UM3730_15 Datasheet, PDF (1/11 Pages) Union Semiconductor, Inc. – 150mA, Micropower, Low Dropout Linear Regulator

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.
Typical output noise is only 220μV_RMS and typical dropout voltage is 155mV at the load current of
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)
 Low Noise: 220μV_RMS (10Hz to 100kHz)
 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
UM3730
VIN
VIN
VOUT
1uF
VOUT
1uF
Chip Enable
EN
GND
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http://www.union-ic.com Rev.03 May.2015
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