ZXRE060

ZXRE060

Document number: DS33611 Rev. 2 - 2

2 of 10

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November 2010

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Diodes Incorporated

Pin Description

Pin

Name

Function

1

PGND

Power Ground: Ground return for emitter of output transistor: Connect PGND and GND together.

2

GND

Analog Ground: Ground return for reference and amplifier: Connect GND and PGND together.

3

IN

Supply Input. Connect a 0.1

μF ceramic capacitor close to the device from IN to GND.

4

FB

Feedback Input. Regulates to 600mV nominal.

5

OUT

Output. Connect a capacitor close to device between OUT and GND. See the Applications

Information section.

Function Block Diagram

The ZXRE060 differs from most other shunt regulators in that it has separate input and output pins and a low voltage reference.

This enables it to regulate rails down to 600mV and makes the part ideal for isolated power supply applications that use opto-

couplers in the feedback loop and where the open-collector output is required to operate down to voltages as low as 200mV.

The wide input voltage range of 2V to 18V and output voltage range of 0.2V to 18V enables the ZXRE060 to be powered from

allows it to operate as a low-dropout voltage regulator for microprocessor/DSP/PLD cores.

As with other shunt regulators (and shunt references), the ZXRE060 compares its internal amplifier FB pin to a high accuracy

internal reference; if FB is below the reference then OUT turns off, but if FB is above the reference then OUT sinks current – up

to a maximum of 15mA.