Datasheet

LTM4637
8
4637fc
For more information www.linear.com/LTM4637
blocK DiagraM
Figure 1. Simplified LTM4637 Block Diagram
POWER
CONTROL
C
V
OUT
V
IN
5.1V
1M
60.4k
f
SET
RUN
V
FB
SGND
COMP
V
OUT_LCL
R2
R1
MODE_PLLIN
TRACK/SS
R
fSET
50k
R
FB
90.9k
C SOFT-START
4637 F01
0.6µH
M1
V
OUT
V
OUT
1V
20A
V
IN
V
IN
4.5V TO 20V
M2
INTERNAL
COMP
2.2Ω
SGND
INTERNAL
LOOP
FILTER
INTV
CC
2.2µF
250k
DIFF_OUT
V
OSNS
+
V
OSNS
–
GND
PGOOD
INTV
CC
EXTV
CC
> 1.4V = ON
< 1.1V = OFF
MAX = 5V
–
–
+
+
1.5µF
10µF
+
C
IN
C
OUT
+
TEMP
PNP
10k
400mV
499k
PTC
INTV
CC
DIFF
AMP
+
–
+
OTP
~135°C
pin FuncTions
V
OSNS
+
: (J12) (+) Input to the Remote Sense Amplifier.
This pin connects to the output remote sense point. The
remote sense amplifier can be used for V
OUT
≤ 3.3V. Con-
nect to ground when not used.
V
OSNS
–
: (M12) (–) Input to the Remote Sense Amplifier.
This pin connects to the ground remote sense point. The
remote sense amplifier can be used for V
OUT
≤ 3.3V. Con-
nect to ground when not used.
DIFF_OUT
: (K12) Output of the Remote Sense Amplifier.
This pin connects to the V
OUT_LCL
pin for remote sense
applications. Otherwise float when not used. The remote
sense amplifier can be used for V
OUT
≤ 3.3V.
MTP1, MTP2, MTP3, MTP4, MTP5, MTP6, MTP7,
(A12, B
11, C10, C11, C12, D11, D12): Extra
mounting
pads used for increased solder integrity strength. Leave
floating.