Datasheet

LT8705
13
8705fb
For more information www.linear.com/LT8705
block DiagraM
Figure 1. Block Diagram
V
IN
CSNIN
R
SENSE1
R
SENSE
R
SENSE2
V
OUT
V
IN
CSN CSP
CSPIN
IMON_IN
MODE
CLKOUT
SYNC
RT
SS
2.5V
EXTV
CC
R
SHDN2
INTV
CC
BOOST1
TG1
C
B1
M1
M2
M3
D1
(OPT)
D2
(OPT)
M4
C
B2
D
B2
D
B1
SW1
GATEV
CC
BG1
GND
BG2
SW2
TG2
BOOST2
CSPOUT
CSNOUT
IMON_OUT
FBIN
R
FBIN1
R
FBOUT1
R
FBOUT2
R
FBIN2
FBOUT
V
C
SWEN
OSC
FAULT_INT
STARTUP
AND FAULT
LOGIC
–
+
8705 F01
A7
SHDN
1.234V
–
+
–
+
A5
UV_INTV
CC
OT OI_IN OI_OUT
UV_V
IN
UV_LDO33 UV_GATEV
CC
6.35V
LDO
REG
6.35V
LDO
REG
3.3V
LDO
REG
6.4V
EN EN INTERNAL
SUPPLY2
INTERNAL
SUPPLY1
V
IN
–
+
–
+
–
+
BUCK
LOGIC
BOOST CAPACITOR
CHARGE CONTROL
BOOST
LOGIC
LDO
REG
–
+
A6
SRVO_FBOUTSRVO_FBINSRVO_IOUT SRVO_IINLDO33
–
+
EA4
–
+
EA3
–
+
EA2
1.205V
1.207V
1.208V
IMON_IN
–
+
EA1
V
IN
R
SHDN1
A8
A9