描述 Description

The UC39431 is an adjustable shunt voltage regulator with 100mA sink capability. The architecture, comprised of an error amplifier and transconductance amplifier, gives the user separate control of the small signal error voltage frequency response along with a fixed linear transconductance. A minimum 3MHz gain bandwidth product for both the error and transconductance amplifiers assures fast response. In addition to external programming, the IC has threeinternal resistors that can be connected in six different configurations to provide regulated voltages of 2.82V, 3.12V, 5.1V, 7.8V, 10.42V, and 12.24V. A sister device (UC39432) provides access to the non-inverting error ampilifer input and reference, while eliminating the three internal resistors.

特性 Features

·Multiple On-Chip Programmable Reference Voltages·0.4% Initial Accuracy·0.7% Overall Reference Tolerance·2.2V to 36.0V Operating Supply Voltage and User Programmable Reference·36.0V Operating Supply Voltage·Reference Accuracy Maintained For Entire Range of Supply Voltage·Superior Accuracy and Easier Compensation for Optoisolator Application·Improved Architecture Provides a Known Linear Transconductance with a +5% Typical Tolerance