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LTC3872 Datasheet(PDF) 8 Page - Linear Technology

Part # LTC3872
Description  Wide Input Voltage Range
Download  32 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3872 Datasheet(HTML) 8 Page - Linear Technology

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LT3759
8
3759fb
BLOCK DIAGRAM
M1
1.22V
1.2V
2.5V
CIN
CVCC
INTVCC
DRIVE
VIN
RSENSE
VISENSE
+
IS1
2μA
10
9
8
1
12
EN/UVLO
BANDGAP
REFERENCE
TSD
~165˚C
A10
Q3
VC
VC
BG_LOW
UVLO
IS2
10μA
IS3
CC1
CC2
RC
DRIVER
SLOPE
SENSE
GND
GATE
50mV
SR1
RAMP
GENERATOR
+
RQ
S
2.5V
RT
RT
SS
CSS
SYNC
FREQ
FOLDBACK
1.25V
FBX
PGOOD
FBX
Q4
1.6V
–0.8V
+
+
2
6
3
5
4
+
+
7
13
RAMP
PWM
COMPARATOR
FREQUENCY
FOLDBACK
100kHz ~ 1MHz
OSCILLATOR
R1
R2
L2
FBX
D1
CDC
VOUT
COUT2
COUT1
+
3759 F01
A1
A2
1.72V
–0.86V
+
+
A11
A12
A3
1.25V
FREQ
PROG
+
+
Q1
A4
A5
A6
G5
G6
A7
Q2
G4
R3
R4
VIN
11
INTERNAL BIAS
GENERATOR
DRIVE LDO
CURRENT
LIMIT
INTERNAL BIAS
CURRENT
LIMIT
VIN LDO
A8
+
G8
1.52V
–0.76V
+
+
A13
A14
G7
2.7V
A15
+
G2
G1
L1
BG
Figure 1. LT3759 Block Diagram Working as a SEPIC Converter


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