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http://www.union-ic.com Rev.03 May.2015

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UM3730

150mA, Micropower, Low Dropout Linear Regulator

UM3730DA-xx DFN4 1.0×1.0

UM3730P-xx SOT353

General Description

The UM3730 series are low dropout linear regulators designed for low power portable applications.

150mA. Ideal for battery powered applications, the UM3730 draws only 29μA current during no

load operation. The UM3730 includes an auto-discharge feature that is activated when the enable

pin is low.

Other features include 2% output voltage accuracy, excellent transient response, stability with ultra

low ESR ceramic capacitors as small as 1μF, thermal overload protection and output current

limiting.

The UM3730 series are available in low profile DFN4 1.0×1.0 and SOT353 packages.

Applications

Features



Digital Camera



PDAs and Notebook Computers



Portable Instruments and

Battery-Powered Systems



Cellular Phones



Input Voltage Range: 2.5V to 5.5V



Guaranteed 150mA Output Current



±2% Voltage Accuracy at 150mA



Low Dropout Voltage:

155mV(Typical) at 150mA



Low Quiescent Current: 29μA(Typical)





Available Fixed Output Voltage from 1.0V to

3.3V with 0.1V Step



Output Current Limit



Thermal Overload Protection



Stable with 1μF Output Capacitor



Low Profile DFN4 1.0×1.0 and SOT353

Packages

Typical Application Circuit

VIN

VOUT

GND

EN

UM3730

VIN

VOUT

Chip Enable

1uF

1uF