UM4750
300mA, Micropower, Dual Channel VLDO Linear Regulator
UM4750S-xx SOT23-6
UM4750DA-xx DFN6 2.0×2.0
UM4750DB-xx DFN8 3.0×3.0
General Description
The UM4750 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 UM4750 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 UM4750S-xx series are available in a low profile SOT23-6 package, the UM4750DA-xx
series are available in a low profile DFN6 2.0×2.0 package, and UM4750DB-xx series are
available in a low profile DFN8 3.0×3.0 package.
Applications
Features
z Bluetooth/802.11 Cards
z PDAs and Notebook Computers
z Portable Instruments and
Battery-Powered Systems
z Cellular Phones
z Very Low Dropout: 200mV (Max) at 100mA
z Maximum Input Voltage: 5.5V
z Low Noise:200μVRMS (10Hz to 100kHz)
z Fast Transient Response
z Dual LDO Outputs (300mA/300mA)
z Output Current Limit
z Stable with 1μF Output Capacitor
z Thermal Overload Protection
z Low Profile SOT23-6, 6-Lead DFN 2.0×2.0
and 8-Lead DFN 3.0×3.0 Packages
Pin Configurations
Top View
M: Month Code
UM4750S-xx
SOT23-6
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http://www.union-ic.com Rev.08 Dec.2016
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