UM475xx
300mA, Micropower, Dual Channel VLDO Linear Regulator
UM475xxS SOT23-6
UM475xxDA DFN8 3.0×3.0
General Description
The UM475xx series are dual channel VLDO (very low dropout) linear regulators designed for
low power portable applications. The range of output voltage is from 1.2V to 5.0V while operated
from 2.5V to 5.5V input. Typical output noise is only 200μVRMS and maximum dropout is just
200mV at the load current of 100mA. The shutdown current is near zero current which is suitable
for battery powered devices.
The UM475xx series offer high 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 UM475xxS series are available in a low profile SOT23-6 package and UM475xxDA series
are available in a low profile DFN8 3.0×3.0 package.
Applications
Bluetooth/802.11 Cards
PDAs and Notebook Computers
Portable Instruments and
Battery-Powered Systems
Cellular Phones
Pin Configurations
Features
Very Low Dropout: 200mV(max) at 100mA
Maximum Input Voltage: 5.5V
Low Noise:200μVRMS (10Hz to 100kHz)
±2%Voltage Accuracy at 150mA
Fast Transient Response
Dual LDO Outputs(300mA/300mA)
Output Current Limit
Stable with 1μF Output Capacitor
Thermal Overload Protection
Low Profile SOT23-6 and 8 leads DFN3.0×3.0
Packages
Top View
M: Month Code
UM475xxS
SOT23-6
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http://www.union-ic.com Rev.02 Sep.2012
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