LTM4637_15 Datasheet, PDF (8/30 Pages) Linear Technology – 20A DC/DC Module Step-Down Regulator

LTM4637
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, B11, C10, C11, C12, D11, D12): Extra mounting
pads used for increased solder integrity strength. Leave
floating.
BLOCK DIAGRAM
V_{OUT_LCL}
V_IN
> 1.4V = ON
R1 ^{< 1.1V = OFF}
MAX = 5V _RUN
R2
COMP
SGND
R_FB
90.9k
V_FB
f_SET
R_fSET
50k
C SOFT-START TRACK/SS
MODE_PLLIN
INTV_CC
2.2µF
EXTV_CC
8
V_OUT
1M
INTERNAL
COMP
60.4k
5.1V
POWER
CONTROL
INTERNAL
LOOP
FILTER
250k
PTC
OTP
~135°C
499k
+
400mV
INTV_CC
10k
PGOOD
1.5µF
V_IN
TEMP
V_IN
+
4.5V TO 20V
C_IN
PNP
M1
0.6µH
V_OUT
V_OUT
1V
20A
+
M2
10µF
C_OUT
GND
INTV_CC
2.2Ω
SGND
DIFF
AMP
V_OSNS–
V_OSNS+
C
DIFF_OUT
4637 F01
Figure 1. Simplified LTM4637 Block Diagram
4637fc
For more information www.linear.com/LTM4637