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LTM4644 Datasheet(PDF) 9 Page - Linear Technology

Part # LTM4644
Description  Low VIN 20A DC/DC 關Module Step-Down Regulator
PDF  32 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTM4644 Datasheet(HTML) 9 Page - Linear Technology

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LTM4639
9
4639f
For more information www.linear.com/LTM4639
BLOCK DIAGRAM
Figure 1. Simplified LTM4639 Block Diagram
POWER
CONTROL
C
VOUT
VIN
5.1V
1M
60.4k
fSET
RUN
VFB
SGND
COMPA
VOUT_LCL
R2
R1
MODE_PLLIN
TRACK/SS
RfSET
75k
RFB
90.9k
47pF
C SOFT-START
4639 F01
0.3µH
M1
VOUT
CPWR
VOUT
1V
20A
VIN
+5V BIAS
VIN
2.375V TO 7V
M2
INTERNAL
COMP
2.2
SGND
INTERNAL
LOOP
FILTER
COMPB
INTVCC
2.2µF
250k
DIFF_OUT
VOSNS+
VOSNS–
GND
PGOOD
INTVCC
EXTVCC
> 1.4V = ON
< 1.1V = OFF
MAX = 5V
1.5µF
35V
10µF
6.3V
+
CIN
COUT
+
TEMP+
TEMP–
OT_TEST
10k
400mV
499k
PTC
INTVCC
DIFF
AMP
+
–
+
OTP
~135°C
PNP



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