ISL6422B Datasheet, PDF (3/18 Pages) Intersil Corporation – Dual Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-Top Box Designs

Block Diagram
17
COUNTER
OVERCURRENT
PROTECTION
LOGIC SCHEME 1
OLF1
DCL1
12
GATE1
PWM
LOGIC
Q
S
CLK1
OC1
PGND1
11
CS ILIM1
AMP
CS1
15
∑
SLOPE
COMPENSATION
TDOUT1
23
TONE
DECODER
22
TDIN1
TXT1
VREF1
14
VSW1
20,21
19,32
VO1
AGND
24
VCC
ON CHIP
LINEAR
UVLO
SGND
POR
2
SOFT-START
INT 5V
SOFT-START
EN1/EN2
10
16
NOTE:
1. Pinouts shown are for the QFN package.
56
8
4
7
OLF2
DCL2
OVERCURRENT
PROTECTION
LOGIC SCHEME 2
COUNTER
SDA SCL ADDR1
OC2
ADDR0OUVFO11UVF2
CLK2
PWM
LOGIC
Q
S
GATE2
39
PGND2
40
ISEL1L AND
ISEL1H
EN1
ENT1
OLF1 FLT OLF2
I²C
INTERFACE
ISEL2L AND
ISEL2H
EN2
ENT2
ILIM2 _CS
AMP
∑
CS2
36
OTF
VTOP1 VBOT1
DCL
VBOT2 VTOP2
SLOPE
COMPENSATION
BAND GAP
REF VOLTAGE
REF
VOLTAGE
ADJ1
BGV
CLK1
OSC. _CLK2
1.1MHz
DIV AND
WAVE SHAPING
TONE
INJ
CKT 1
INT
TONE
TONE
INJ
CKT 2
BGV
REF
VOLTAGE
ADJ2
VREF2
SELVTOP2
34
VSW2
37
+
VO2
30,31
+
-
-
EXT TONE CKT
ENT1
ENT2
TDOUT2
28
TONE
DECODER
TDIN2
29
OTF
THERMAL _{CHARGE PUMP} ^CPSWIN
SHUTDOWN
25
CPVOUT CPSWOUT
18
9
1
33 ³⁵
27
26