ZLDO1117

Issue 1

1 of 12

June 2009

www.diodes.com

1A Low Dropout Positive Regulator

1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V and Adjustable outputs

Description

Pin Assignments

ZLDO1117 is a low dropout positive adjustable or fixed-

mode regulator with 1A output current capability.

The ZLDO1117 has a 2% tolerance across the industrial

temperature range and is guaranteed to have lower than

1.2V dropout at full load current making it ideal to provide

well-regulated outputs of 1.2V to 5.0V with input supply

voltages up to 18V.

The ZLDO1117 is ideally suited to provide well-regulated

supplies for low voltage IC applications such as high-

speed bus termination and low current 3.3V logic supply

across the whole industrial temperature range.

SOT223

TO252

Features

•

1.2V Maximum Dropout at Full Load Current

•

2% tolerance over temperature, line and load

variations

•

Fast Transient Response

•

Output Current Limiting

•

Built-in Thermal Shutdown

•

Good Noise Rejection

•

Suitable for use with MLCC capacitors

•

-40 to 125°C Junction temperature range

with lead free Finish/RoHS Compliant (Note 1)

Typical Application circuit

1A I/O – 1.8V core regulator

3.3V

4.7µF

MLCC

ZLDO1117-18

1.8V

4.7µF

MLCC