55V High Efficiency Buck-Boost Power Manager and Ultraflacher

Ultrathin
Dual
2.5A
or
Single
5A
µModule
Regulator
Fits
on
the
Ultrathin
Dual
2.5A
or
Single
5A
µModule
Regulator
Fits
on
the
Ultraflacher
µModule-Regler
mit einem
5-A-Ausgang
oder
Backside
of
PCBs,
Allowing
Space
on
the
Topside
for
Digital
ICs
55V
High
Efficiency
Buck-Boost
Power
Manager
and
Backside
of
PCBs,
Allowing
Space
on
the
Topside
for
Digital
ICs
zwei
2,5-A-Ausgängen
passt
auf
die
Platinenrückseite
und
Design Note 546
Design
Multi-Chemistry
Battery Charger
lässt Note
auf 546
der Oberseite
Platz für digitale ICs
Sam Young, Afshin Odabaee
Sam
Young,
Afshin
Design
Note
531
Design
Note
546Odabaee
Introduction
Sam
Young,
Charlie
Zhao Afshin Odabaee
Introduction
2
Flexible Dual Supply in a Simple <0.5cm
2
Flexible
Dual
Supply
in
a
Simple
<0.5cm
The top side of a typical system board, such as a Footprint
Flexible Doppel-Stromversorgung mit unkompliziertem FootEinführung
The
top card,
side of
typicalpopulated
system board,
such as a Footprint
PCIe
is adensely
with FPGAs/ASICs/
LTM4622
a wide
input voltage
rangeofofbattery
3.6V
Introduction
The
charger
is has
easily
optimized
for a variety
von weniger
0,5 input
cm² voltage range of 3.6V
Die Oberseiten
typischer populated
Systemplatinen
(z.FPGAs/ASICs/
B. von PCIe-Karten)Theprint
PCIe
card, is densely
with
LTM4622
has
aals
wide
to
20V,
and
it
can
be
configured
to
operate
down
to
microprocessors,
transceivers,
connectors,
memory
chemistries.
For
instance,
it
can
follow
a
constantToday,
battery
chargers
areMikroprozessoren,
expected
to easily
supportto 20V,
sind dicht
mit FPGAs,
ASICs,
Transceivern,
Der LTM4622
bietet
einen weitentoEingangsspannungsbereich
andoperation
it can
befrom
configured
operate
down
to
microprocessors,
transceivers,
connectors,
memory
3.1V
for
a
3.3V
input
supply.
It
regulates
ICs
and
DC/DC
regulators,
while
the
backside
is
often
current/constant-voltage
(CC/CV)
charge
algorithm,
aSteckverbindern,
variety
of battery
chemistries
and
accept is
a range
of3.1Vvon
Speicher-ICs
und Gleichspannungswandlern
V bis 20 from
V und alässt
für supply.
den Betrieb
bis 3,1 V herab
for2,6
operation
3.3Vsich
input
It regulates
ICs
and DC/DC
regulators,
while
backside
often betwo
voltages
for3,3
a compact
multi-rail
solution,
where
unused.
Thisdie
isUnterseite
a common
sidethe
effect
ofbleibt.
thepanels.
significant
with
eitherfor
C/10
or
timed
termination
for
lithium-based
voltage
inputs,
including
wide-ranging
solar
It
is
konfigurieren
(bei
V
Eingangsspannung).
Er
regelt
zwei Spanstückt,
während
häufig
ungenutzt
Dies
ist
ein
two
voltages
a
compact
multi-rail
solution,
where
unused.
This
is
a
common
side
effect
of
the
significant
each
output
can
supply
up
to
2.5A
(3A
peak)
andDabei
is
difference
in topdervsunterschiedlichen
side
height
restrictions,
battery
systems,
a constant-current
(CC)
characteristic
üblicher
Nebeneffekt
Höhenbeschränkunnungen
und
ergibt
dann
eine
kompakte
Multi-Rail-Lösung.
increasingly
common
forback
input
voltage
ranges
to spaneach
output
can
supply
up
to
2.5A 0.6V
(3A
peak)
andwithin
is
difference
in
top
vs
back
side
height
restrictions,
capable
of
precisely
regulating
to
5.5V
specifications
maywährend
allow
topside
devices with
termination,
4-step,
3-stage
kann timed
jederprecisely
Ausgang
bis
zu or
2,5an
A optimized
(maximal
A) liefern,
und die
genwhere
für and
dieboard
Oberund
Unterseite:
die Bauelemente
above
below
thedieoutput
battery
voltage,
requiring
capable
regulating
0.6V voltage
to 35.5V
within
where
board
specifications
may
allow
topside
devices
±1.5%ofmaximum
total
DC output
error
over
to
reach
a
few
centimeters,
but
restrict
backside
zwischen
0,6
V
und
5,5
V
liegende
Ausgangsspannung
wird
auf
der
Oberseite
gemäß
den
Leiterplatten-Spezifikationen
einige
lead-acid
charge
profile.
step-down
and step-up capability
(buck-boost
to-±1.5% maximum total DC output voltage error over mit
toboth
reach
a
few
centimeters,
but
restrict
backside
line,
load
and
temperature.
For
higher
output
current
packages
to less dürfen,
than
2.3mm.
Whatmanager
if für
functions
einem maximalen Gesamtfehler von ±1,5 % über EingangsspanZentimeter
emporragen
ist die Gehäusehöhe
Bauelepology).
The
LTC4020
buck-boost
power
andline,6.3A
andsimply
temperature.
For
higher
output
current
packages
to Unterseite
lessonthan
2.3mm.
if beschränkt.
functions
Charger
fortie25.2V
Battery
Float
Voltage
upload
toLast
5A,
thegeregelt.
outputs
current
sharing.
mente
auf der
auf
wenigersuch
alsWhat
2,3
mm
Wie nung,
und Temperatur
Fürfor
höhere
Ausgangsströme
usually
found
the
topside,
as
DC/DC
regulator
multi-chemistry
battery-charging
controller
can
take
up
to
5A,
simply
tie
the
outputs
for
current
sharing.
usually
found
on
the
topside,
such
as
DC/DC
regulator
wäre
es,
wenn
Funktionen
etwa
wie
Gleichspannungswandler,
die
bis
zu
5
A
werden
beide
Ausgänge
einfach
zusammengeschaltet
Figure
1
shows
a
15V
to
55V
input,
25.2V/6.3A
buckcircuits could
be to
thinner
and moved
to the bottom?
The LTM4622 requires only three ceramic capacitors
wide-ranging
4.5V
55V
inputs
and
produce
output
circuits
could
be
thinner
and
moved
to
the
bottom?
normalerweise
auf
der
Oberseite
der
Leiterplatte
platziert
werden,
(Current
Sharing).
The
LTM4622
requires
only
three
ceramic
capacitors
efficiency
boost
charger,
featuring
a highoccupying
Real estate
on55V.
top Its
would
be available
for expanding
and twobattery
resistors
to complete
a solution
voltages
upontodass
buck-boost
DC/DC
controller
Real
estate
top sie
would
beUnterseite
available
for expanding
so memory
flach
wären,
auf die
verlagert
kön-and4-switch
Der
LTM4622
benötigt
lediglich
drei
Keramik-Kondensatoren
und
two
resistors
complete
aorsolution
(M2–M5)
synchronous
buck-boost
DC/DC
2 to
2occupying
or enhancing
the
board/given
thewerden
additional
less
than
1cm
single-sided
0.5cm
on
a
doublesupports
battery
system
voltages
above,
2 single-sided
2 on aalsdoublenen? Hierdurch
wäre and
an der
Oberseite
mehr the
Fläche
frei, below,
um bei-lesszwei
memory
or
enhancing
the
board/given
additional
Widerstände
für
eine
Lösung,
die
weniger
1
cm²
auf
eithan
1cm
or
0.5cm
top side space.
sided
PCB.
L,
LT, LTC,
LTM, Linear Technology and the Linear logo are registered
or
equal
toden
theSpeicher
input voltage.
spielsweise
zu erweitern oder den Funktionsumfangsided
top
side space.
ner PCB.
einseitigen
oder 0,5is cm²
auf einer
doppelseitigen
Leiterplatte
trademarks
and
PowerPath
a
trademark
of
Linear
Technology
Corporation.
desThe
Boards
zu®vergrößern.
4622 is a dual 2.5A, or single two-phase All
LTM
beansprucht.
other trademarks
the property
of theircircuit
respective
Figure
1 showsarethe
LTM4622
inowners.
a typical dual
®
two-phase
The
LTM
®
® 4622 is a dual 2.5A, ®or single
Figure
1
shows
the
LTM4622
circuit
in
a
typicalsolution
dual
4622 iststep-down
ein als µModule
(Power-Modul)
implemenDer5A,
LTMoutput
(power
module)
µModule
Bild
1
zeigt
die
LTM4622-Schaltung
in
einer
typischen
Dual-Outoutput application, illustrating the compact
®
(power
module)
5A,
output
step-down
application,
illustrating
the
compact
solution
tierter
Abwärtswandler
mit µModule
zwei
2,5-A-Ausgängen
oder
einemoutput
regulator
in a 6.25mm
× 6.25mm
× 1.82mm
ultrathin
put-Anwendung
und
illustriert
die
Kompaktheit
der
Lösung.
size. Efficiency and power loss for the circuit operatingDie
regulator
in a in6.25mm
× 6.25mm ×6,25
1.82mm
and
power
loss
for
the circuit
5-A-Ausgang
einem ultraflachen,
mm ×ultrathin
6,25 mm ×size.
Effizienz
und die
Verluste
der
bei 12 operating
V gehen aus Bild
LGA package.
atEfficiency
12V input
are
shown
inSchaltung
Figure
2.
+ At nearly the height of a soldered down
LGA
package.
At
nearly
the
height
of
a
soldered
down
1,82
mm
messenden
LGA-Gehäuse.
Mit
der
ungefähren
Höhe
at
12V
input
are
shown
in
Figure
2.
1206 case size capacitor, its ultralow height allows 2 hervor.
1206
case
sizeoncapacitor,
its im
ultralow
height
allows
eines
aufgelöteten
Kondensators
lässt
sich
der Zuverlässige,
Reliable High
Performance Regulation
+
mounting
the
backside
of1206-Format
a PCB,
freeing
space
High leistungsfähige
PerformanceRegelung
Regulation
LTM4622 auf
derthe
Unterseite
einerofLeiterplatte
montieren,
wodurchReliable
mounting
on
backside
a
PCB,
freeing
space
The LTM4622
LTM4622basiert
features
a controlled
on-time currentmit
auf einer
Current-Mode-Architektur
on the topside of the board. The thin profile allows it Der
The
LTM4622
features
a
controlled
on-timeAnsprechverhalcurrentand
aufthe
dertopside
OberseiteofPlatz
wird. The
Dankthin
seines
flachenallows
Profils itkann geregelter
on
thefrei
board.
profile
mode architecture
a fast
transient
Einschaltzeit,forwas
für ein
schnellesresponse
to
meet
demanding
height
restrictions
such
as
those
der
Baustein
ehrgeizige
Höhenbeschränkungen
einhalten,
wie
mode
architecture
for
a
fast
transient
response
and
to meet
demanding
height
restrictions
such as those
required
by PCIe
and advanced
mezzanine
cards in L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are
sie
beispielsweise
für
PCIe-Karten
und
fortschrittliche
Mezzanine
LT, LTC, LTM,
Linear Technology,
the Linear logo
and µModule
are trademarks
trademarks
of Linear Technology
Corporation.
All other
required
by PCIe
and advanced
mezzanine cards in L, registered
embedded
computing
systems.
registered
Linear
Technology
Corporation. All other trademarks
Cards
in eingebetteten
Rechnersystemen
are thetrademarks
property ofoftheir
respective
owners.
embedded
computing
systems. gelten.
are the property of their respective owners.
C1, 0.1µF
100V, 0603
VIN
15V TO 55V
C2
56µF
63V
63HVH56M
R38
5.1Ω
0805
R1
100k
C23
C16
4.7µF
100V
1210
C3
56µF
63V
63HVH56M
GND
PVIN
R2
510k
SHDN
VIN_REG
R4
51k
C40
0.22µF
0603
R5
OPT
C39
0.22µF
0603
VIN
3.6V VTO
IN 20V
3.6V TO 20V
VBAT
MODE
R14
10k
12/15/546
12/15/546
12/15/546
10/14/531
C4
100pF
0603
RNG/SS
ILIMIT
VOUT
R8
226k
0603
0.1%
R9
226k
0603
1%
R10
24.9k
0.1%
R11
24.9k
1%
VFBMIN
VFBMAX
VFB
FBG
NTC
CSOUT
MODE
TIMER
RT
SENSVIN
SENSTOP
LTC4020
INTVCC
STAT2
STAT1
BST1
BST2
R13
100k
C21
10µF
6.3V
0805
D1
SBR0560S1
R27
3k
D3
RED
D2
SBR0560S1
D4
GRN
R26
3k
C19
0.22µF
25V
0603
SW1
SW2
M2
SiR664DP
TG1
L1
5.6µH
C20
0.22µF
25V
0603
D6
B360A
C14
VOUT110µF
WÜRTH 7443556560
35V
BG1
PGOOD1 M4 PGOOD2
VOUT1
1.5V, 2.5A
1210
SiR664DP
47µF
SENSBOT
PGOOD1
PGOOD2
1.5V,
2.5A
V
V
R
IN
CBRB1
OUT1
0.002 Ω
4.7µF V C12
C18
M5 47µF
V
LTM4622
IN 0.033µF
OUT1
RUN1 1W
10µF
SiR422DP
4.7µF
VOUT2
SENSGND
25V
2512
35V
LTM4622
VOUT2
RUN2
VOUT2
25V BG2 RUN1
1.2V, 1210
2.5A
V
OUT2
47µF
RUN2
1.2V,
2.5A
INTVCC
COMP1
TG2
47µF
CSP INTV
COMP1
CC
SYNC/MODE
COMP2 R20
R19
RCBAT1
C11
100Ω
0.008Ω
20Ω
SYNC/MODE
COMP2
TRACK/SS14.7µF
1W
FB1 R18
6.3V
2512
TRACK/SS1
TRACK/SS20603 FB1 FB2 100Ω
CSN
TRACK/SS2
M1
BGATE
FREQ
GND FB2
60.4k
40.2k
Si7145DP
VBAT FREQ
GND
60.4k
40.2k
ACTUAL SIZE
ACTUAL SIZE
C5
0.22µF
0603
RCBRT1
0.002Ω
1W
2512
M3
SiR422DP
VC
ITH
R15
36k
0603
R16
47k
0603
C27
10µF
35V
1210
C28
10µF
35V
1210
BAT
25.2V FLOAT
6.3A MAX
GND
dn546 F01
dn546 F01
SGND
SGND
PGND
C6
C5
Figure
1. Typical
Application:
6.8nF
47pF 1.5V/2.5A, 1.2V/2.5A Dual
0603
Figure
1. Typical
Application:
1.5V/2.5A,
1.2V/2.5A
Dual
Bild 1.
Typische
Anwendung
mit
1,50603
V/2,5 V (Single)
oder 1,2
V/2,5 V (Dual)
dn531 F01
Figure 1. 15V to 55V Input, 25.2V/6.3A Buck-Boost Battery Charger
+
C15
220µF
35V
35HVH220M
C17
220µF
35V
35HVH220M
VOUT
21V TO 28V
8A MAX
+
GND
EFFICIENCY
(%) (%)
EFFICIENCY
EFFICIENCY
(%)
POWER
POWER
LOSS
LOSS
(W)
(W) (W)
POWER
LOSS
86
1.0
two
outputs
to
be
combined
in
parallel
for
load
von
0,5reset.
V übersteigt.
die Spannung
anschließend
wieder
Der
MCB
externer crowbar
Crowbar-Baustein,
der
an den its
MCB
is ist
anein
external
optional
device
residing
These
pins
give
added
flexibility
to to
86 optionaler
1.0
itsbeen
two
outputs
to Fällt
bethree
combined
ingive
parallel
forflexibility
load unMCB
is
an
been
reset.
These
three
pins
added
84 external optional crowbar device residing
86
1.0 adjustable
tertwo
0,5 the
V,up
wird
das
Schalten
jedoch
erst
dann
wieder
ermöglicht,
Ausgang
angeschlossen
wird.
Sobaldexceeds
die Ausgangsspannung
ei- its
currents
to
5A.
84
outputs
to
be
combined
in
parallel
for
load
.
If
the
output
voltage
an
onon
VOUT
tailor
behavior
of
the
LTM4641.
currents
tobehavior
5A.
Dietailor
Bilderup
5 und
6 verdeutlichen
die
thermischen Eigenschaften
If the
outputüberschreitet
voltage exceeds
VOUT.8482
the
of thewurde.
LTM4641.
0.8an adjustable
wenn
das
Latch
zurückgesetzt
Diese
drei Pins
bieten zunen
einstellbaren
Grenzwert
(voreingestellt
ist eine currents
82
0.8nominal—
EFFICIENCY
MCB
is
an
external
optional
crowbar
device
residing
been
reset.
These
three
pins
give
added
flexibility
to
up
to
5A.
threshold
—default
value
is
11%
above
und
die
Current-Sharing-Eigenschaften
des
LTM4622
in einer
80
EFFICIENCY
Figures
55 and
66 demonstrate
the
thermal
and
current
threshold8280 —default
value
is 11%
above
nominal—
0.8
sätzliche
Flexibilität,
um
das
Verhalten
des
LTM4641
individuell
Ansprechschwelle
von
11
%
über
der
Nennspannung),
legt
der
Figures
and
demonstrate
the
thermal
and
current
V
IN
.
If
the
output
voltage
exceeds
an
adjustable
on
V
tailor
the
behavior
of
the
LTM4641.
thethe
LTM4641
its
CROWBAR
output
high
EFFICIENCY
OUT
78 pulls
Konfiguration
für
zweiphasiges
Current
Sharing,
wobei
aus 5 V
0.6 logic
Vperformance
CIN(MLCC)
+and
IN
sharing
of
the
LTM4622
when
configured
LTM4641
pulls
its
CROWBAR
output
highFigures
80
5performance
6 demonstrate
the thermal
and
current
78 CROWBAR-Ausgang
0.6
CIN(MLCC)
einzustellen.
LTM4641
seinen
umgehend
(d.nominal—
h.logic
mit einer
+CIN(BULK)
sharing
ofAusgangsspannung
the10µF
LTM4622
when
configured
threshold
—default
value
is
11%
above
76
immediately
(500ns
response
time,
maximum)
and
Eingangsspannung
eine
von
3,3
V
bei
5 A er10µF
C
78
0.6
IN(BULK)
for
two-phase
current
sharing,
generating
×2LTM4622
immediately
(500ns500
response
time,High
maximum)
andsharing
76
performance
of the
when configured
Reaktionszeit
von maximal
ns) auf logisch
und schaltet
VINH a
×2
for
two-phase
current
sharing,
generating
a 3.3V
3.3V
Vwird
IN
74 output
0.4 logic
VINH
zeugt
(16,5
W).
the
LTM4641
pulls
its
CROWBAR
output
high
VINL
latches
off
its
voltage:
the
power
stage
becomes
C
76
+
IN(MLCC)
74
0.4
output
at
from
a 5V input.
VINL
latches
off
its outputdauerhaft
voltage:
theDie
power
stage becomes
seine
Ausgangsspannung
ab.
Leistungsstufe
wird for
two-phase
current
sharing,
generating
a 3.3V
output
at 5A
5A C(16.5W)
(16.5W)
from
10µFa 5V input.
POWER LOSS
72 (500ns response
TUV
IN(BULK) R
immediately
time,
maximum)
and
Gespiegeltes
Layout
ergibt
kleinere
Leiterplatte bei höherer
74
0.4
high
impedance,
with
both
internal
andand
bottom
UVLO
< 0.5V = OFF
RTUV
POWER
LOSS top
72 der obere
×2UVLO
hochohmig,
und
interne
MOSFET
wirdtop
ebenso
wie
der output
high
impedance,
with
both
internal
bottom
< 0.5V
= OFF
at
5A
(16.5W)
from
a
5V
input.
VINH
70
0.2
UVLO
POWER
LOSS
72
VINL
latches
offlatched
its
voltage:
the power
stage
becomes
UVLO
70 output
0.2
MOSFETs
off.off.
The
CROWBAR
output
turns
onon Leistung
untere
abgeschaltet.
Der
CROWBAR-Ausgang
MCB
ein,
RHYST
LTM4641
MOSFETs
The
CROWBAR
output
turns
1.2V, 1MHzschaltet
RBUV
68 latched
86
1.0
RTUV
RHYST in angeordnet.
LTM4641
R
70
0.2
1.2V,
1MHz
its
two
outputs
to
be
combined
parallel
forInload
BUV
68
Die
Pins
des
LTM4622
sind
symmetrisch
An1.5V,
1MHz
high
impedance,
with
both
internal
top
and
bottom
UVLO < 0.5V = OFF HYST
MCB,
discharging
the
output
capacitors
and
preventing
wodurch
die
Ausgangskondensatoren
entladen
werden
und
ein
86
1.0
1.5V,1MHz
1MHz 0and preventing its two outputs to be combined in parallel
66 84
MCB, discharging
the
output
capacitors
for load
HYST
1.2V,
HYST
PULLS
UP
WHEN
UVLO
68
66
0
0
0.5
1.0
2.0
2.5
1.5
wendungen
mit
höherem
Strombedarf,
in
denen
für
Ausgangscurrents
up
to
5A.
HYST
PULLS
UP
WHEN
MOSFETs
latched
The
output
turns
any
further
positive
excursion
the
output
voltage.
weiteres
Ansteigen
der0.5off.
Ausgangsspannung
unterbunden
wird. on
ON, HYST PULLS
DOWN
0 84
1.0 CROWBAR
2.0 1MHz
2.5
1.5 of1.5V,
RHYST
LTM4641
R
0.8 voltage.
any
further
positive
excursion
LOAD
CURRENT (A) of the output
BUV
currents
upA to
5A.LTM4622
ON,WHEN
HYST OFF
PULLS
DOWN
66 82
0
ströme
bis 10
zwei
parallelgeschaltet
werden, lässt
LOAD
CURRENT
(A) 2.0
0 82 ist0.5
1.0EFFICIENCY
2.5
1.5
MCB,
discharging
the
output
capacitors
and preventing
0.8
WHEN OFF
HYST and current
R
Der
Baustein
MSP
zwischen
die
eingangsseitige
SpannungsTOV
80
Figures
5
and
6
demonstrate
the
thermal
R
HYST
PULLS
UP
WHEN
EFFICIENCY
IOVRETRY
>
0.5V
=
OFF
MSP
is
placed
between
the
input
TOV
LOAD CURRENT
(A) power source (VIN)
sich
einer
der
Bausteine
an
der
Oberseite
und
der
andere direkt
80
IOVRETRY
>
0.5V
=
OFF
)
MSP
is
placed
between
the
input
power
source
(V
IOVRETRYand current
5 and 6 demonstrate
the
thermal
any further
positive
excursion
of) der
the
output
Figure
Efficiency,
Power
Loss
at
12V
Input
quelle
(VIN) und2.
Eingangs-Pin
(VINH
Leistungsstufe
desIN Figures
ON,of
HYST
PULLS
DOWN
78
0.6voltage.
IOVRETRY
sharing performance
the
LTM4622
configured
Figure
2.den
Efficiency,
Power
Loss
at
12V
Input
gegenüber
an derRMOV
Unterseite
platzieren,
waswhen
die benötigte
Lei),
and
is
and
the
LTM4641's
power
stage
input
pins
(V
WHEN
OFF
INH
78
0.6
Bild
2.
Effizienz
und
Verluste
bei
12
V
),
and
is
and
the
LTM4641's
power
stage
input
pins
(V
(Figure
1
Design)
sharing
performance
of
the
LTM4622
when configured
LTM4641
geschaltet.
Der Baustein
dient
RTOV
INH elektRcurrent
Figure
2.1 76
Efficiency,
Power
Lossals
atrückstellbarer
12Vsource
Input
MOV
OVLO
> 0.5V
=>LATCHOFF
for
two-phase
sharing,
generating
a
3.3V
(Figure
Design)
terplattenfläche
minimiert,
aber
die
Ausgangsleistung
und
die
IOVRETRY
0.5V
=
OFF
)
MSP
is
placed
between
the
input
power
(V
used
as
a
resettable
electronic
power-interrupt
switch.
OVLO > 0.5V = LATCHOFF
76
OVLO
IN
Eingangsspannung
(für die Sobald
Schaltung
aus Bild
1)switch.
0.4 SchaltunIOVRETRY
used
as
a resettable
power-interrupt
ronischer
Stromkreisunterbrecher.
die internen
for
two-phase
current
sharing,
generating
a 3.3V
OVLO
(Figure
1 74
Design) electronic
output
at
5A
(16.5W)
from
a
5V
input.
Leistungsdichte
erhöht.
SGND
GND
R
74
0.4
),
and
is
and
the
LTM4641's
power
stage
input
pins
(V
When
a
fault
condition,
such
as
an
output
overvoltage
INH
POWER
LOSS
RBOV
72
loop
over
wide
voltage
range.
It provides
RBOV
MOV
gen
desstability
LTM4641
einenaa Fehler
wie
etwa
eine
Überspannung
am
When
a fault
condition,
asüber
an
output
overvoltage
output at 5A (16.5W)
from a 5V input.SGND GND
loop
over
wide such
voltage
range.
provides
OVLO > 0.5V = LATCHOFF
ten
undstability
eine
hohe72
Regelkreis-Stabilität
einenItweiten
Span- Figure
POWER
LOSS
used
as
a
resettable
electronic
power-interrupt
switch.
== 5V,
V
=
25°C
5.
V
(OOV)
condition,
is
detected
by
the
LTM4641’s
70
0.2 internal
IN
OUT
Ausgang
(Output
Overvoltage
–
OOV)
registrieren,
wird
das
Gate
short-circuit,
overvoltage
and
overtemperature
3.3V/5A, TTAA == OVLO
25°C Thermals
Thermals
(OOV)
condition,
detected
by
the
LTM4641’s
internalFigure 5. VIN 5V, VOUT = 3.3V/5A,
loop
stability
over
aiswide
voltage
range.
ItKurzschluss-,
provides
short-circuit,
overvoltage
and
overtemperature
nungsbereich
sorgt.
Der
Baustein
verfügt
über
70
0.2
SGND
GND
1.2V,
1MHz
R
68
When
a
fault
condition,
such
as
an
output
overvoltage
BOV
circuitry,
gate
of of
MSP
is maximal
discharged
2.6μs
SGNDV
CONNECTS
TO GND INTERNAL
MODULE.
= 3.3V/5A,
TA = TO
25°C
Thermals
des
MSP in the
einer
Zeitspanne
von
2,6
µswithin
entladen,
wo- Figure 5. VIN = 5V,
protection
and
ensures
monotonic
output
voltage
OUT
1.5V,
1MHz
circuitry,
the
gate
MSP
is
discharged
within
2.6μs
short-circuit,
overvoltage
and
overtemperature
SGND
CONNECTS
TO GNDSEPARATE
INTERNAL
TO MODULE.
1.2V,
1MHz
Überspannungsund
Übertemperaturschutz
und
gewährleistet
68
KEEP
SGND
ROUTES/PLANES
FROM
GND
protection
and
ensures
monotonic
output
voltage
66
0
(OOV)
condition,
is
detected
by
the
LTM4641’s
internal
KEEP
SGND
ROUTES/PLANES
SEPARATE
FROM
GND
1.5V,
1MHz
3.0
(maximum)
and
MSP
The
input
source
supdurch
der MSP
abschaltet.
Damit
wird
dieThe
Stromversorgung
vom
ON MOTHERBOARD
0ensures
0.5turns
1.0off.
2.0
2.5ability
1.5
ramping
with
tracking,
soft-start
and
the
to
(maximum)
and
MSP
off.
input
supprotection
and
monotonic
output
voltage
3.0
66
0source
einen
monotonen
Anstieg
derturns
Ausgangsspannung
mit
Tracking,
ON MOTHERBOARD
ramping
with
tracking,
soft-start
and
the
ability
to
LOAD
CURRENT
(A)
0
0.5
1.0
2.0
2.5
1.5
Vply
-Anschluss,
dem
Eingang
der
Leistungsstufe
des
LTM4641,
circuitry,
the
gate
of
MSP
is
discharged
within
2.6μs
SGND CONNECTS TO GND INTERNAL TO MODULE.
thus
disconnected
from
the
LTM4641’s
power
3.0
INH is into
start
aader
prebiased
output.
It
places
no
limitation
ramping
with
tracking,zum
soft-start
and
the
ability
tounSoftstart
und
Fähigkeit
Hochfahren
anLTM4641’s
einem
bereits
ply into
is
thus
disconnected
from
the
power
2.5
LOAD
CURRENT
(A)
KEEP SGND ROUTES/PLANES SEPARATE FROM GND
start
prebiased
output.
Itthe
places
no
limitation
2.5
Figure
2. 2.
Circuit
to to
SetSet
thethe
Input
UVLO,
IOVRETRY
getrennt.
Die
gefährliche
Eingangsspannung
kann
auf
diese
(maximum)
and
MSP
turns
off.
The
input
source
sup),
preventing
hazardous
(input)
stage
input
(V
ONCircuit
MOTHERBOARD
on
input
supply
slew
rate.
Figure
Input
UVLO,
IOVRETRY
INH
ter
Spannung
stehenden
Ausgang.
Die
Anstiegsgeschwindigkeit
start
intoFigure
a prebiased
output.
It places
no12V
limitation
),
preventing
the
hazardous
(input)
stage
input
(V
2.
Efficiency,
Power
Loss
at
Input
INH
2.5
on
input
supply
slew
rate.
and
OVLO
Thresholds
Weise
nicht
mehr
an
den
wertvollen
Verbraucher
gelangen.
Zur
2.0
ply
is
thus
disconnected
from
the
LTM4641’s
power
voltage
from
reaching
the
precious
load.
LTM4641
and
OVLO
Thresholds
Figure
2.
Efficiency,
Power
Loss
at
12V
Input
der
Eingangsspannung
unterliegt
keinen
Beschränkungen.
2.0
Design)
on
input(Figure
rate. the
voltage
from
reaching
precious
load.ferner
LTM4641
Figures
3supply
and
4411slew
demonstrate
the
transient
and
Erzeugung
des
OOV-Grenzwerts
nutzt
derfast
LTM4641
eine
Figure
2. Circuit zum
to Set
the Input
IOVRETRY
Bild
2. Beschaltung
Festlegen
derUVLO,
Ansprechschwellen
(Figure
Design)
), preventing
the
hazardous
(input)
stage
input
(V
also
uses
an
independent
voltage
to to
gener2.0
Figures
and
demonstrate
the
fast
transient
and
INH
Die
Bilder
33und
4 illustrieren
dasreference
schnelle
Ansprechverhalten
und
1.5
also
uses
an
independent
reference
voltage
generunabhängige
Referenzspannung,
die
nicht
mit
der
Bandlücken
and
OVLO
Thresholds
prebias
start-up
performance
for
the
1.5V
output
rail
Efficiency
1.5
für
UVLO,
IOVRETRY
und
OVLO
CHANNEL
2
Figures
3
and
4
demonstrate
the
fast
transient
and
voltage
from
reaching
the
precious
load.
Efficiency CHANNEL 2
ate
anan
OOV
threshold,
from
the
control
IC’s
prebias
start-up
performance
for
the
1.5V
output
rail
das
Anlaufverhalten
an
einem
bereits
unter
Spannung
stehenden
loop
stability
over
aseparate
wide
voltage
range.
ItLTM4641
provides
ate
OOV
threshold,
separate
from
the
control
(bandgap)
-Spannung
des Regelungs-IC
zusammenhängt.
of
the
Figure
111,5-V-Ausgang
circuit.
Effizienz
1.0Thermisches
prebias
start-up
performance
for
the
1.5V
rail IC’s Figure
Bild 5.
Verhalten
31.5
below
shows
the
efficiency
forfor
thethe
loop
stability
over
a wide
voltage
range.
1
= 5V,
VOUT
= 3.3V/5A,
TA = curves
25°C
Thermals
Figure
5.
V below
CHANNEL
2 CHANNEL
also
uses
an
independent
reference
voltage
generAusgang
für
den
der
Schaltung
aus output
BildItto
1.provides
bandgap
voltage.
of
the
Figure
circuit.
Figure
shows
the
curves
1.03 IN
short-circuit,
overvoltage
and
overtemperature
CHANNEL
1 efficiency
bandgap
voltage.
=Vtypical
5V,
V3,3
= (bei
3.3V/5A,
TA =TA25°C
Thermals
Figure
5.
V5IN
Efficiency
bei
V
=
V,
=
V
5
A)
und
=
25
°C
OUT
of
the
Figure
1
circuit.
Bild
3
zeigt
die
typischen
Wirkungsgradkurven
des
LTM4641
bei
short-circuit,
overvoltage
and
overtemperature
LTM4641
for
a
12V
input
voltage
for
the
circuit
IN
OUT
1.0
ateprotection
an OOV threshold,
separate
from the
control
IC’s
and
ensures
monotonic
output
voltage
LTM4641
for a typicalCHANNEL
12V 1input voltage for the circuit
0.5
waveforms
Figure
1
shows
the
CROWBAR
and
V
Bild
1
zeigt
den
Verlauf
der
CROWBAR-Spannung
und
von
V
,
0.51.
OUT
einer
typischen
Eingangsspannung
von
12
V
für
die
Schaltung
aus
Figure
3
below
shows
the
efficiency
curves
for
the
OUT
protection
and
ensures
monotonic
output
voltage
in
Figure
With
all
the
protection
circuits,
LTM4641
waveforms
Figure
1
shows
the
CROWBAR
and
V
3.0
bandgap
voltage.
OUT
ramping
with
tracking,
soft-start
and
the
ability
to in Figure
1. With all the protection circuits, LTM4641
VOUT
0.5 3.0
wenn
der
obere
MOSFET
(MTOP
ausfällt
undcausing
es
zuthe
einem
Kurzfails,
aability
shortwhen
the
top
MOSFET
M)TOP
Bild
1.still
Auch
allen
Schutzschaltungen
kommt der
auf
0 mit
VOUT
LTM4641
for
a typical
12V
input4 voltage
forLTM4641
the circuit
ramping
with
tracking,
soft-start
and
to can
achieve
high
efficiency.
fails,
causing
a
shortwhen
the
top
MOSFET
M
100mV/DIV
TOP
0
3
0
1
2
5
start
into
a
prebiased
output.
It
places
no
limitation
can
still
achieve
high
efficiency.
100mV/DIV
AC-COUPLED
schluss
zwischen
undCROWBAR
demand
Knoten
SW
kommt.
Das
CROW- eine
waveforms
Figure
1
shows
the
and
V
VOUT VIN
3
02.5
1
2
4
5
SW
nodes.
CROWBAR
circuit
between
V
hohe
Effizienz.
OUT
IN
TOTAL
LOAD
CURRENT
(A)
in
Figure
1.
With
all
the
protection
circuits,
LTM4641
start
into
a
prebiased
output.
It
places
no
limitation
AC-COUPLED
0
and SW nodes. CROWBAR
circuit
between
the
100mV/DIV
IN500
onhigh
input
supply
slewVrate.
CURRENT
(A)4
3
0 2.5
1 TOTAL LOAD
2
5
BAR-Signal
wechselt
binnen
nsfails,
in den
High-Status
und
95
causing
a to
shortwhen
the
top
MOSFET
M
goes
within
500ns
and
turns
on
MCB
to
short
TOP
can still achieve
high
efficiency.
LOAD
STEP
onAC-COUPLED
input
supply
slew
rate.
2.095
goes
high
within
500ns
and
turns
on
MCB
short
TOTAL
LOAD
CURRENT (A)
LOAD
STEP
Figure
6.
Accurate
Current
Sharing
Over
schaltet
damit
ein,
der
den
Ausgang
mit
der
Masse
1A/DIVden MCB
and
SW
nodes.
CROWBAR
circuit
between
the
V
2.0
exceeds
of of
the
thethe
output
to3 ground.
Figures
and 4 demonstrate
theexceeds
fast 110%
transient
and
INV never
6. 90
Accurate Current Sharing Over the
the Entire
Entire
never
110%
the Figure
output
LOAD1A/DIV
STEPto ground.OUT
OUT
90
Load
Range
[V
=
5V,
V
=
3.3V
at
5A]
verbindet.
V
steigt
zu
keinem
Zeitpunkt
auf
mehr
als
110
%
der
Figures
3
and
4
demonstrate
the
fast
transient
and
IN
OUT
1.5
95
Figure
6.
Accurate
Current
Sharing
Over
the
Entire
OUT
1A/DIV
goes
high
within
500ns
and
turns
on
MCB
to
short
Load
Range
[V
=
5V,
V
=
3.3V
at
5A]
specified
output
voltage.
prebias
start-up
performance
for
the
1.5V
output
rail
IN
OUT
CHANNEL
2
specifiedstart-up
output voltage.
851.5[V = 5V, V
Nenn-Ausgangsspannung
an.
performance
for
theaus
1.5V
output
rail Load Range
Bild
Sprungantwort
dernever
Schaltung
Bild
1 of the
CHANNEL
2 = 3.3V at 5A]
OUT
85 IN
Figure
3.
Load
Step
Response
(Figure
11110%
Design)
exceeds
theprebias
to
ground.
VOUT
ofoutput
the 3.Figure
1 circuit.
90
1.0
CHANNEL 1
Figure
3.
Load
Step
Response
(Figure
Design)
Input
Overvoltage
and
Undervoltage
Protections
Überund
Unterspannungsschutz
für
den
Eingang
Mirrored
Layout
for
Smaller
PCB
but
(12
V
Eingangsspannung,
1,5
V
Ausgangsspannung
of
the
Figure
1
circuit.
[12V
Input,
1.5V
Output,
1.25A
to
2.5A]
1.0
Input
Overvoltage
and
Undervoltage
Protections
80
CHANNEL
1 but
specified
output
voltage.
Mirrored Layout
for Smaller
PCB
Figure
3. Load
Step
Response
[12V Input,
1.5V
Output,
1.25A(Figure
to 2.5A]1 Design)
6.0V
80
OUT
85
6.0V
und
1,5
A
bis
2,5
A
Ausgangsstrom)
0.5
Der
Eingang
des
LTM4641
ist
mit
einem
Überund
UnterspanHigher
Power
OUT
The
LTM4641
has
input
undervoltage
and
overvoltage
Mirrored
Layout
for
Smaller
PCB
but
5.0V
OUT
[12V
Input,
1.5V
Output,
1.25A
to
2.5A]
The LTM4641
has input
undervoltage and
overvoltageHigher Power
OUT
750.5
3.3V5.0V
Input
Overvoltage
andthresholds
Undervoltage
Protections
OUT
nungsschutz
versehen,
dessen
Ansprechschwellen
vom
Benutzer
protections,
whose
trip
cancan
be
setset
byby
thetheHigher
3.3V
VOUT
Power
OUT is organized
The
LTM4622’s
pin
configuration
80 75
2.5V
protections,
whose
trip
thresholds
be
OUT
0
6.0V
The
LTM4622’s
pin
configuration
is organized
OUT
2.5V
100mV/DIV
Vkönnen
1.8V
gewählt
werden
(Bild
2). 2.
OUT
3 OUT OUT
1
2
4
5
70 0 0 So for
The
LTM4641
has
input
undervoltage
and
overvoltage
user.
Please
refer
to
Figure
5.0V
symmetrically.
higher
current
AC-COUPLED
OUT
1.8V
70
OUT isapplications
100mV/DIV
The
LTM4622’s
configuration
organized
user. Please
refer to Figure 2.
1.5V
LOAD
CURRENT
(A)
OUT
3
1TOTAL
2
4
5
75 0 Sopin
symmetrically.
for
higher
current
applications
3.3V
OUT
1.5V
AC-COUPLED
OUT
Der
UVLO-Pin
(UVLO
=
Undervoltage-Lockout)
ist
direkt
mit
dem
VOUTwhose trip thresholds can be set by the
protections,
1.2V
OUT(A)
where
can
paralleled
for
TOTAL
LOAD be
CURRENT
2.5V
symmetrically.
So for
higher
current
VOUT
OUTOUT applications
1.2V
1V/DIV
where two
two 65LTM4622s
LTM4622s
can
be
paralleled
for up
up to
to
LOAD
STEP
The
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pin
feeds
directly
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inverting
input
1.0V
OUT
1.8V
invertierenden
Eingang
Komparators
verbunden,
dessen
1V/DIV
70 65
The
UVLO
pin
feeds
directly
into
inverting
inputwhere
OUTOUT Over the Entire
1.0V
user.
Please
refer
toeines
Figure
2.into
Figure
6.
Accurate
Current
Sharing
VOUT
1A/DIV
0.9V
,
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device
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on
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topside
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PCB
and
10A
LOAD
STEP
OUT
two
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can
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paralleled
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up
to
OUT
1.5V
OUT
0.9V
,
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device
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on
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topside
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PCB
and
10A
of
a
comparator
whose
trip
threshold
is
0.5V.
When
OUT Over the Entire
1V/DIV
60
Figure
6. 60Accurate
Current
Sharing
OUT
1A/DIV0,5 Vwhose
Ansprechschwelle
beträgt.trip
Wennthreshold
die Spannung
am UVLORUN
Bild
6.
Präzises
Current
Sharing
über
den
gesamten
of a comparator
is 0.5V.
When10A
Load
Range
=3 5V,
=topside
3.3V
5A]
1.2V
OUT
IN
0 1[V
7 minimizing
10
2 the
4 V5OUT
6side,
8 at9 of
the
other
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65
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10V/DIV
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1can
3 on
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7minimizing
9 PCB
10 PCB
2 5V,
4 the
63.3V
8 5A]
OUT
The
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inverting
input
the
other
mirrored
on
the
bottom
side,
Load
Range
=
V
=
at
the
UVLO
pin
falls
below
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switching
action
is
OUT
Pin
auf
unter
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V
fällt,
wird
das
Schalten
des
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unterIN
OUT
Laststrombereich.
V
=
5
V,
V
=
3,3
V
(bei
5 A)
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OUTPUT
CURRENT
(A)
INOUTPUT CURRENT
OUT
the UVLO
RUN pin falls below 0.5V, switching action is
0.9V
(A)
area
while
increasing
output
power
and
power
density.
OUT
Figure
3.
Load
Step
Response
(Figure
1
Design)
the
other
mirrored
on
the
bottom
side,
minimizing
PCB
10V/DIV
of
a
comparator
whose
trip
threshold
is
0.5V.
When
area
while
increasing
output
power
and
power
density.
60
inhibited;
when
UVLO
exceeds
0.5V,
switching
bunden.
Sobald
die3.the
Spannung
anpin
UVLO
wieder(Figure
über
0,5
ansteigt,
Figure
Load
Step
Response
1VDesign)
inhibited;
the
UVLO
pin
exceeds
0.5V,
switching
Mirrored
Layout
0 1 2 for
3 Smaller
7 8 but
9 10
4 5 6 PCB
[12Vwhen
Input,
1.5V
Output,
1.25A
to 2.5A]
area
whileBild
increasing
output
power
and
power
density.
Fazit
Figure
4.
12V
,
1.8V
Start-Up
into
the
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pin
falls
below
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switching
action
is
3.
Wirkungsgrad-Kennlinien
LTM4641
kann
das
Schalten
wieder
beginnen.
Die
Pins
IOVRETRY
und
OVLO
Figure
3. 3.
Efficiency
Curves
LTM4641
action
can
resume.
The
IOVRETRY
and
OVLO
pins
each
Mirrored
Layout
for
Smaller
PCB
IN
OUT
Conclusion
OUTPUT
CURRENT
(A)ofdes
Bild
4.
Anlaufverhalten
der
Schaltung
mit
12
V
[12V
Input,
1.5V
Output,
1.25A
to
2.5A]
Figure
Efficiency
Curves
ofbut
LTM4641
Figure
4. 12V
1.8VOUT Start-Up
into pins eachConclusion
action can
resume.
The
and OVLO
Higher
Power
IN, IOVRETRY
Prebiased
Output
sind
direkt
an
die
nicht
invertierenden
Eingänge
von
KomparatoDer
ultraflache
LTM4622
ermöglicht
die
Anordnung
eines
inhibited;
when
the
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pin
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switching
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feed
directly
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of of
comparators
Eingangsspannung
1,8OUT
Vinputs
Ausgangsspannung
Figure
4.noninverting
12V
, 1.8V
Start-Up
into
Higher
Power
Prebiased
Output
INund
Conclusion
The
ultrathin
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itit possible
put
aaleisfeed
directly
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inputs
comparators
The
LTM4622’s
pinSingleconfiguration
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organized
The
ultrathin
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ren
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Ansprechschwellen
ebenfalls
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V
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tungsfähigen
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für
und
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Figure
3.
Efficiency
Curves
of
LTM4641
Conclusion
Prebiased
Output
an
einem
unter
Spannung
stehenden
Ausgang
action
can
resume.
The
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and
OVLO
pins
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thresholds
areare
0.5V.
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thethe
IOVRETRY
Das
µModule
LTM4641
überwacht
diepossible
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The
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Conclusion
high
performance
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and
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0.5V.
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ultrathin
LTM4622
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symmetrically.
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high
performance
regulator
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single
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Parallel
Operation
for
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Steigt
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über
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comparators
pin
exceeds
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switching
action
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inhibited;
when
The
LTM4641
μModule
regulator
monitors
Parallel
Operation
for
Higher
Current
symmetrically.
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for
higher
current
applications
applications
on
the
backside
of
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PCB,
or
into
tight
VOUT
pin
exceeds
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switching
action
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when
high
performance
regulator
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single
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The
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μModule
regulator
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Parallelbetrieb
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where
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verhältnissen
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der
Oberseite.
weite
Spannungsbereich,
applications
on
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backside
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PCB,
or
into
tight
das
Schalten
des
Wandlers
ebenfalls
unterbrochen.
Erst
wenn
die
Applications
Conclusion
Parallel
Operation
for
Higher
Current
1V/DIV
stein
bietet
Verbrauchern
wie
etwa
Prozessoren,
ASICs
und
anwhose
trip thresholds
0.5V.
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VOUT beloware
IOVRETRY
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0.5V,
switching
cancanapplications
voltage,
output
voltage
and
temperature
conditions.
Applications
where
two
LTM4622s
can
be
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for
up
to
spaces
on
the
topside.
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wide
operating
range,
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switching
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voltage,
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voltage
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1V/DIV
die
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Lösungsabmessungen
Die
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OUT
spruchsvollen
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einen
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und
therApplications
The
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pin
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inhibited;
when spaces
The
LTM4641
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regulator
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input
resume.
When
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OVLO
pin
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It
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,provide
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The
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When
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comprehensive
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compact
solution
size
make
highly
mischen
Schutz
vor
überhöhten
Spannungen.
10V/DIV
RUN current
reliable
cycle-by-cycle
current
monitoring,
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IOVRETRY
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switching
action
can
voltage,
output
voltage
and
temperature
conditions.
The
LTM4622's
mode
architecture
yields
action
is
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when
OVLO
subsequently
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protection
from
excessive
voltage
stress
for
loads
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bottom
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flexible
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protection
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excessive
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power
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density.
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4. 12V
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Conclusion
Prebiased
Output
Data Sheet
Download
0.5V,
switching
action
cannot
occur
until theinto
latch has as
processors,
ASICs
andmakes
high
end
FPGAs. to put a
applications
help,
The
ultrathin For
LTM4622
it possible
Data Sheet
Download
Prebiased
Output
For
applications
help,it
Data
Sheet
Download
The
ultrathin
LTM4622
makes
possible
to put a
Data
Sheet
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For
applications
help,
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performance
regulator
for
single
For applications
help,
For
applications
help, and multi-rail
call (408)
432-1900,
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Parallel
Operation
for
Higher
Current
high
performance
regulator
for
single
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a• PRINTED
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spaces
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Its
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