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http://www.union-ic.com Rev.02 Dec.2014

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UM365xx

300mA, Micropower, VLDO Linear Regulator

UM365xxS SOT23-3

UM365xxP SOT323

General Description

The UM365xx series are VLDO (very low dropout) linear regulators designed for low power

portable applications. Maximum dropout is just 200mV at the load current of 100mA.The internal

P-channel MOSFET pass transistor requires no base current, allowing the device to draw only

90μA during normal operation at the maximum load current of 300mA.

Other features include high output voltage accuracy, under voltage lockout, stability with ultra low

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

The UM365xx series are available in a low profile SOT23-3 or SOT323 package.

Applications

Features



Bluetooth/802.11 Cards



PDAs and Notebook Computers



Portable Instruments and

Battery-Powered Systems



Cellular Phones



Very Low Dropout: 200mV(Max) at 100mA



Maximum Input Voltage: 6.0V





±2% Voltage Accuracy at 150mA



Fixed Output Voltage:

1.2V to 5.0V with 100mV Interval



Output Current Limit



Stable with 1μF Output Capacitor



Thermal Overload Protection



Low Profile SOT23-3 or SOT323 Package

Pin Configurations

Top View

Pin Description

M: Month Code

UM365xx

SOT23-3/SOT323

Pin Number

Symbol

Function

1

GND

Ground

2

OUT

Voltage Regulated Output

3

IN

Power Supply