ISL6455 Datasheet, PDF (3/13 Pages) Intersil Corporation – Low shutdown supply current

Functional Block Diagram
ISL6455, ISL6455A
10nF
3.3V
10k
CT
RESET
PG_LDO
RESET
POR ^POR
Gm
BAND
GAP
REF
1.2V
WINDOW
COMP.
EN_LDO
GND_LDO
EN
CONTROL
LOGIC
THERMAL
SHUTDOWN
+150°C
Gm
WINDOW
COMP.
VIN
VIN
RTN
SGND
FB_PWM
SOFT-
START
SLOPE
COMPENSATION
EA
GM
EN
PWM
OVERCURRENT,
OVERVOLTAGE
LOGIC
COMPENSATION
CURRENT
SENSE
GATE
DRIVE
750kHz
OSCILLATOR
EN
POWER GOOD
PWM
V_OUT
UVLO
+-
LDO1
+-
LDO2
VIN_LDO
VIN_LDO
VIN_LDO
VOUT1
VOUT1
R_c
FB_LDO1
0
10µF
R_d
CC1
CC2
33nF
33nF
VOUT2
VOUT2
R_a
FB_LDO2
0
10µF
R_b
PVCC 3.3V
8.2µH
LX
VOUT
10µF
PGND
R_e
GND
R_f
PWM
REFERENCE
0.45V
SYNC EN
3.3V
10k 10k
3.3V
10k
PG_PWM
VOUT
3
FN9196.1
February 19, 2014