Datasheet

LT3756/LT3756-1/LT3756-2
9
375612fb
block DiagraM
+
–
+
–
+
–
+
–
+
–
+
+
–
A1
A3
A6
+
+
–
FREQ
PROG
1.25V
SSCLAMP
1.1V
CTRL
V
REF
SHDN/UVLO
ISP
ISN
Q2
150mV
50k
170k
140µA
2.1µA
CTRL
BUFFER
g
m
EAMP
PWM
COMPARATOR
DRIVER
I
SENSE
A4
g
m
A10
A5
OVFB
COMPARATOR
1.25V
FB
SHORT-CIRCUIT
DETECT
(LT3756
AND
LT3756-2)
SCILMB
SCILMB
5k
PWMOUT PWM
1.25V
V
IN
INTV
CC
VC
+
–
+
–
A2
R Q
S
RAMP
GENERATOR
100kHz TO 1MHz
OSCILLATOR
+
–
+
–
A8
7.15V
LDO
GATE
SENSE
375612 BD
OPENLED
GND
1.2V
FB
+
–
1.22V
+
–
2V
1.3V
RT
SYNC (LT3756-1 ONLY)SS
SHDN
A7
10µA
10µA AT
FB = 1.25V
VC
T
LIM
165°C
FAULT
LOGIC
10µA
10µA AT
A1
+
= A1
–