LTM4641
TYPICAL APPLICATION
4.5V START-UP
IN
OPERATION UP TO 38V
AND DOWN TO 4V
MSP
C
C
IN(MLCC)
IN(BULK)
100µF
50V
×2
10µF
50V
×4
V
V
V
SW
V
ING INGP INH
OUT
V
V
1V
INL
OUT
C
R
FF1
100pF
20A
MLCC(OUT)
fSET1
750k
MCB
CROWBAR
C
f
SET
100µF
6.3V
×6
UVLO
HYST
FCB
LATCH
R
+
SET1A
2.74k
V
ORB
+
V
OSNS
LOCAL HIGH
FREQUENCY
DECOUPLING
U1
LTM4641
1
1
R
C
SET1B
2.74k
DM1
22pF
LOAD
INTV
DRV
CC
–
–
V
OSNS
CC
C
V
FF2
100pF
IOVRETRY
OVLO
ORB
TEMP
1V
REF
OVPGM
OTBH
RUN ENABLE
RUN
PGOOD
1
TRACK/SS
TMR COMP SGND GND
FAULT INDICATOR
LATCHOFF RESET
TO SYSTEM µP
(OPTIONAL)
C
SS
22nF
C
TMR1
N/U
1
1
1
PULL LATCH NORMALLY LOW FOR
LATCHOFF RESPONSE TO OUTPUT
OVERVOLTAGE AND OVER-
TEMPERATURE EVENTS. PULL
LATCH HIGH TO RESTART 1V OUTPUT
V
V
V
SW
ING INGP
INH
V
V
OUT
INL
R
fSET2
750k
CROWBAR
f
SET
ALTERNATIVELY, CONNECT LATCH
UVLO
HYST
FCB
LATCH
TO INTV AND INSTALL C
TMR2
AUTONOMOUS RESTART AFTER
FAULT SHUTDOWN EVENTS
AND
CC
TO SET 1V OUTPUT FOR TIMED
TMR1
+
V
ORB
C
+
V
OSNS
U2
LTM4641
2
2
C
DM2
22pF
INTV
DRV
CC
–
–
V
OSNS
CC
MCB: NXP PSMN5R0-30YL
MSP: NXP PSMN7R0-60YS
V
IOVRETRY
OVLO
ORB
TEMP
1V
REF
OVPGM
OTBH
PGOOD
RUN
2
TRACK/SS
TMR COMP SGND GND
C
TMR2
N/U
2
4641 F66
2
) CONNECT TO GND INTERNAL TO THEIR RESPECTIVE MODULES. KEEP MODULE
2
U1 AND U2 SGND (
SGND ROUTES/PLANES SEPARATE FROM OTHER MODULES AND FROM GND ON MOTHERBOARD
,
1
Figure 66. 1V, 20A Fault-Protected Load Powered by Paralleled LTM4641—from Up to 38VIN. cf. Typical Performance Characteristics
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
Up to 100A with Four Devices; 4.5V ≤ V ≤ 16V; 0.6V ≤ V
LTM4620
Dual 13A, Single 26A µModule
Regulator
≤ 2.5V. See LTM4620A for Higher
OUT
IN
V
; 15mm × 15mm × 4.41mm LGA
OUT
LTM4613
LTM4627
LTM8027
LTM4609
LT4356
EN55022B Certified 36V, 8A
5V ≤ V ≤ 36V; 3.3V ≤ V
≤ 15V; Synchronizable, Parallelable,
OUT
IN
Step-Down µModule Regulator
15mm × 15mm × 4.32mm LGA
4.5V ≤ V ≤ 20V; 0.6V ≤ V ≤ 5V; Synchronizable, Parallelable,
20V, 15A Step-Down µModule
Regulator
IN
OUT
Remote Sensing, 15mm × 15mm × 4.32mm LGA or 15mm × 15mm × 4.92mm BGA
60V, 4A Step-Down µModule
Regulator
4.5V ≤ V ≤ 60V; 2.5V ≤ V
≤ 24V; Synchronizable,
IN
OUT
15mm × 15mm × 4.32mm LGA
4.5V ≤ V ≤ 36V; 0.8V ≤ V
36V, 4A Buck-Boost µModule
Regulator
≤ 34V; Synchronizable, Parallelable, Up to 4A in Boost Mode
OUT
IN
and 10A in Buck Mode, 15mm × 15mm × 2.82mm LGA or 15mm × 15mm × 3.42mm BGA
High Voltage Surge Stopper
100V Overvoltage and Overcurrent Protection, Latchoff and Auto-Retry Options
IN
4641f
LT 1012 • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
64
●
●
LINEAR TECHNOLOGY CORPORATION 2012
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
Linear [ Linear ]
