8283 Datasheet, PDF (2/8 Pages) Allegro MicroSystems – LNB SUPPLY AND CONTROL-VOLTAGE REGULATOR

8283
LNB SUPPLY AND
CONTROL-VOLTAGE REGULATOR
FUNCTIONAL BLOCK DIAGRAM
47 V
MAX
RS
+
VINT
VOLTAGE
REG.
EN
5V
ENT
CHARGE
PUMP
176 kHz
BOOST
VOLTAGE ⁰
1
–
7V
+
BUCK
CONV.
VREF
352 kHz
÷2
–
OVER-
+
CURRENT
–
+
25 kΩ
800 mV
–
+
150 mV
÷8 &
WAVESHAPING
22 kHz TONE
TSD
OLF
OVER-
CURRENT
5 kΩ
5 kΩ
1 kΩ
TCAP
MI
MIOUT
LNB
EXTM
Dwg. FP-051-1
Output Voltage Select Table
VSEL0
L
L
L
L
H
H
H
H
VSEL1
L
L
H
H
L
L
H
H
LLC
L
H
L
H
L
H
L
H
V_LNB(typ)
13 V
14 V
18 V
19 V
12 V
13 V
20 V
21 V
115 Northeast Cutoff, Box 15036
2
Worcester, Massachusetts 01615-0036 [phone]
Copyright © 2000, Allegro MicroSystems, Inc.