FP701

Single Operational Amplifier and Voltage Reference

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Rev.1.0

1/9

General Description

The FP701 is a single chip composed one op-amp (OPA) with a 1.25V precision voltage

reference on non-inverting input and an open collector output. It offers space and low cost in many

applications such as the secondary feedback control of power supply, AC to DC converter or adaptor.

The FP701 is designed to used as OCP detector with few external components. The circuit

diagram for typical application example is shown as below.

Features



Fixed Reference Voltage: 1.25V



High Precision Over Temperature: 1%



Wide Operating Voltage From 3.0V~25V



Sink Current up to 20mA



Low Input Offset Voltage: 1mV



Package: SOT23-5L

Applications



Battery Charger



High Side Rail Current Detector



SPS (Adaptor)



Current Sense Networking System

Typical Application Circuit

FP130

FP130

PWM

Controller

FP701

1.25V

REF

IN-

OUT

GND