LTM4641
TYPICAL APPLICATIONS
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
40A
MLCC(OUT)
fSET1
750k
MCB
CROWBAR
C
f
SET
100µF
6.3V
×12
UVLO
HYST
FCB
LATCH
R
+
SET1A
1.37k
V
ORB
+
V
OSNS
LOCAL HIGH
FREQUENCY
DECOUPLING
U1
LTM4641
1
1
R
C
SET1B
1.37k
DM1
10pF
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
,
CC
, C
TMR1
TO SET
+
V
ORB
C
AND C
TMR2 TMR3
1V OUTPUT FOR TIMED
TMR4
+
V
OSNS
U2
LTM4641
2
2
AUTONOMOUS RESTART AFTER
FAULT SHUTDOWN EVENTS
C
DM2
10pF
INTV
DRV
CC
–
–
V
OSNS
CC
MCB: NXP PSMN5R0-30YL
MSP: NXP PSMN3R0-60BS
V
IOVRETRY
OVLO
ORB
TEMP
1V
REF
OVPGM
OTBH
PGOOD
RUN
2
TRACK/SS
TMR COMP SGND GND
C
TMR2
N/U
2
2
V
V
V
SW
ING INGP
INH
V
V
OUT
INL
R
fSET3
750k
CROWBAR
f
SET
UVLO
HYST
FCB
LATCH
+
V
ORB
+
V
OSNS
U3
LTM4641
3
3
C
DM3
10pF
INTV
DRV
CC
–
–
V
OSNS
CC
V
IOVRETRY
OVLO
ORB
TEMP
1V
REF
OVPGM
OTBH
RUN
PGOOD
3
TRACK/SS
TMR COMP SGND GND
C
TMR3
N/U
3
3
V
V
V
SW
ING INGP
INH
V
V
OUT
INL
R
fSET4
750k
CROWBAR
f
SET
UVLO
HYST
FCB
LATCH
+
V
ORB
+
V
OSNS
U4
LTM4641
4
4
C
DM4
10pF
INTV
DRV
CC
–
–
V
OSNS
CC
V
IOVRETRY
OVLO
ORB
TEMP
1V
REF
OVPGM
OTBH
RUN
PGOOD
4
TRACK/SS
TMR COMP SGND GND
C
TMR4
N/U
4
4641 F56
4
) CONNECT TO GND INTERNAL TO THEIR RESPECTIVE MODULES. KEEP MODULE
4
U1, U2, U3 AND U4 SGND (
,
,
,
3
1
2
SGND ROUTES/PLANES SEPARATE FROM OTHER MODULES AND FROM GND ON MOTHERBOARD
Figure 56: 1V, 40A Fault-Protected Load Powered by Four Parallel LTM4641—from Up to 38VIN. cf. Figure 57
4641f
52
Linear [ Linear ]
