Datasheet

LT3571
7
3571fa
BLOCK DIAGRAM
–
+
+
+
+
MON
1V
1V
V
OUT
A3
A2
–
+
–
+
A4
–
+
1V
3571 F01
A6
MAIN SWITCH
DRIVER
EAMP
PWM
COMPARATOR
Q1
MAIN
SWITCH
S
RQ
MONIN
7, 10
GND
APD
FB
FB
C3
R4
R5
CTRL
C
C
R
C
SYNC
R
T
V
IN
FREQ
ADJUST
A5
V
REF
RAMP GENERATOR
2MHz TO 250kHz
OSCILLATOR
Q2
C2
–
+
SHDN
R
S
, C
S
OPTIONAL SOFT-START COMPONENTS
R3
V
IN
A1
–
+
x5
APD CURRENT
MIRROR
SOFT-START
1.22V
REFERENCE
8
15
14
16
2
3
4
5, 6
SW
13
9
11
12
L1
R1
FB
R2
C
PL
C1 C
IN
R
SENSE
D1
EXTERNAL
CONTROL
BLOCK
C
S
R
S
ONOFF
Figure 1. Block Diagram