ISL6421A Datasheet, PDF (2/12 Pages) Intersil Corporation – Single Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-top Box Designs

Block Diagram
COUNTER
OVERCURRENT
PROTECTION
LOGIC SCHEME 1
OLF
DCL
SEL18V
GATE
PGND
PWM
OC
LOGIC
Q
S
CLK
CS
COMP
CS ^ILIM
AMP
∑
SLOPE
COMPENSATION
FB
VREF
VSW
BAND GAP
REF VOLTAGE
REF
VOLTAGE
ADJ
ISEL
EN
ENT
OLF
I²C
INTERFACE
SDA
ADDR
SCL
OTF
LLC VSEL
DCL
CLK
OSC.
220kHz
BGV
÷ 10 AND
WAVE SHAPING
TONE
INJ
CKT
22kHz
TONE
VOUT
+
-
VCC
SGND
ON CHIP
LINEAR
UVLO
POR
SOFT-START
INT 5V
SOFT-START
EN
OTF
THERMAL
SHUTDOWN
CHARGE PUMP
CPSWOUT
SDA
ADDR
SCL
ENT
DSQIN
CPVOUT
CPSWIN