LTM4641
TYPICAL APPLICATIONS
3.3V NOMINAL
IN
MSP
3V RISING START-UP
IN
C
+
IN(MLCC)
2.3V FALLING SHUTDOWN
IN
47µF
6.3V
×2
C
IN(BULK)
V
V
V
SW
V
0.9V
10A
ING INGP
INH
OUT
5V
LOW POWER BIAS
<50mA PEAK
V
INL
V
OUT
R
fSET
360k
100µF
6.3V
×4
R
TUV
MCB
R
CROWBAR
150k
f
SET
UVLO
LATCH
R
R
HYST
1M
+
BUV
SET1A
4.12k
V
ORB
30.9k
+
HYST
FCB
V
OSNS
LOCAL HIGH
FREQUENCY
DECOUPLING
LTM4641
R
SET1B
4.12k
LOAD
–
–
V
OSNS
INTV
CC
V
DRV
ORB
CC
TEMP
1V
IOVRETRY
OVLO
REF
MCB: NXP PH2625L
MSP: NXP PSMN013-30LL
OVPGM
OTBH
PGOOD
100k
RUN
TRACK/SS
TMR
COMP SGND GND
C
SS
4.7nF
4641 F49
SGND CONNECTS TO GND INTERNAL TO MODULE, KEEP SGND
ROUTES/PLANES SEPARATE FROM GND ON MOTHERBOARD
Figure 49. LTM4641 Producing 0.9VOUT at 10A, from 3.3VIN, and Providing Advanced Output Overvoltage
Protection. VINL, INTVCC, and DRVCC Biased from a Low Power Auxiliary 5V Rail
V
IN
1V/DIV
V
OUT
1V/DIV
HYST
5V/DIV
PGOOD
5V/DIV
4641 F50
4ms/DIV
Figure 50. Oscilloscope Snap-Shot of Figure 49 Circuit, 2Ω Load on VOUT
.
3.3VIN Applied Briefly to Highlight UVLO Rising and Falling Thresholds
4641f
50
Linear [ Linear ]
