FP103

Dual Operational Amplifier and Reference Regulator

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Rev. 1.0

1/9

General Description

The FP103 is a single chip composed of one independent OP-AMP (OPA2) and another

OP-AMP (OPA1) with a 2.5V precision voltage reference on non-inverting input. It offers space and low

cost in many applications such as the secondary feedback control of power supply, DC/DC converter

or adaptor.

The FP103 is designed for regulator feedback circuit with few external components. The circuit

diagram for typical application is shown as below.

Features



Fixed Reference Voltage: 2.5V



Reference Voltage Precision: 1%



Output Sink Current up to 100mA



Low Quiescent Supply Current



Wide Operating Voltage Range: 3~32V (+ / -16V)



Low Input Offset Voltage



Unit Gain Bandwidth: 0.9MHz



Package: SOP-8L

Typical Application Circuit

Va

OPA1

OPA2

Va

Va

AC-DC Adaptor Secondary Feedback Circuits

PWM Control Board

FB