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UM1430/1440

18V Input, 100mA Current Limited, Micropower

Linear Regulator

UM1430S-xx SOT23-3

UM1430S5-xx/UM1440S-xx SOT23-5

UM1430Y-xx/UM1430B-xx SOT89-3

UM1440Y-xx SOT89-5

General Description

The UM1430/1440 series are high input voltage low quiescent current regulators implemented in

CMOS technology. It can accept input voltage as high as 18V with 100mA output current limit.

The output voltages are selectable in 100mV step within a range of 2.0V to 6.0V. 100mA output

current limiting is built in to provide protection for the regulators against fault conditions. CMOS

technology ensures low voltage drop and low quiescent current.

With a chip enable control pin, the UM1440 can turn off the output and greatly reduce the power

consumption by setting the enable pin low.

The UM1430 is available in SOT23-3, SOT23-5 and SOT89-3 packages. The UM1440 is

available in SOT23-5 and SOT89-5 packages.

Applications

Features



Communication Equipment



Audio/Video Equipment



Input Voltage Range: 3.6V to 18V



30mA Guaranteed Output Current



±3% Voltage Accuracy at 30mA



Low Dropout Voltage:

250mV (Typical) at 30mA



Low Quiescent Current:



Available Fixed Output Voltage from 2.0V to

6.0V with 0.1V Step



With Enable Control (UM1440S-xx,

UM1440Y-xx)



Output Current Limit



UM1430: Low Profile SOT23-3, SOT23-5

and SOT89-3 Packages

UM1440: Low Profile SOT23-5 and

SOT89-5 Packages

Typical Application Circuit

VIN

VOUT

GND

UM1430

VIN

VOUT

1µF

10µF

VIN

VOUT

GND

EN

UM1440

VIN

VOUT

Chip Enable

1µF

10µF