Description
The FA531X series are bipolar ICs for switching power supply
control that can drive a power MOSFET.
These ICs contain many functions in a small 8-pin package.
With these ICs, a high-performance and compact power
supply can be created because not many external discrete
components are needed.

Features
High current transfer ratio – 1800% typical
Low input current requirements – 0.5 mA
Low output saturation voltage – 0.1 V
High density packaging
Performance guaranteed over temperature 0°Cto70°C
LSTTL compatible
High output current – 60mA

CMR 86dB min OVER TEMPERATURE
GAIN ERROR: 0.01% max
NONLINEARITY: 0.001% max
NO EXTERNAL ADJUSTMENTS
REQUIRED
EASY TO USE
COMPLETE SOLUTION
HIGHLY VERSATILE
LOW COST,

APPLICATIONS
DIFFERENTIAL AMPLIFIER
INSTRUMENTATION AMPLIFIER
BUILDING BLOCK
UNITY-GAIN INVERTING AMPLIFIER
GAIN-OF-1/2 AMPLIFIER
NONINVERTING GAIN-OF-2 AMPLIFIER
AVERAGE VALUE AMPLIFIER
ABSOLUTE VALUE AMPLIFIER
SUMMING AMPLIFIER
SYNCHRONOUS DEMODULATOR
CURRENT RECEIVER WITH COMPLIANCE
TO RAILS
4mA TO 20mA TRANSMITTER
VOLTAGE-CONTROLLED CURRENT
SOURCE
ALL-PASS FILTERS

FEATURES
Current transfer ratio, 50 % typical
Leakage current, 1.0 nA typical
Two isolated channels per package

Automatic Feedforward Compensation
Pulse-by-Pulse Current Limiting
Enhanced Load Response Characteristics
Undervoltage Lockout With Hysteresis
Double Pulse Suppression
High-Current Totem Pole Output
Internally-Trimmed Bandgap Reference

Features
Open ground protection
High output current
Adjustable short-circuit protection
Internal thermal protection with external reset
Large supply voltage range
Alarm output
Input voltage can be higher than VCC
Output voltage can be lower than ground
(VCC – VO ≤ VCC[max])