UM1650 Datasheet, PDF (1/18 Pages) Union Semiconductor, Inc. – 350mA, Micropower, Very Low Dropout Linear Regulator

UM1650 UM1750
350mA, Micropower, Very Low Dropout Linear Regulator
UM1650S-xx SOT23-3
UM1750S-xx SOT23-5
UM1750Y-xx SOT89-5
UM1750DA-xx DFN6 2.0×2.0
General Description
The UM1650/UM1750 series are very low dropout linear regulators designed for low power
portable applications. Typical output noise is only 195μV_RMS and maximum dropout is just
110mV(Typ) at the load current of 150mA.The internal P-channel MOSFET pass transistor
requires no base current, allowing the device to draw only 190μA during normal operation at the
maximum load current of 350mA.With a shutdown control pin, the UM1750 consumes less than
1μA current in shutdown mode.
Other features include high output voltage accuracy, excellent transient response, under voltage
lockout, stability with ultralow ESR ceramic capacitors as small as 1μF, short-circuit and thermal
overload protection and output current limiting.
The UM1650 series are available in a low profile SOT23-3 package. The UM1750 series are
available in low profile SOT23-5, SOT89-5 and DFN6 2.0×2.0 packages.
Applications
Features
 Bluetooth/802.11 Cards
 PDAs and Notebook Computers
 Portable Instruments and
Battery-Powered Systems
 Cellular Phones
 Very Low Dropout: 150mV(max) at 150mA
 Maximum Input Voltage: 6.0V
 ±2% Voltage Accuracy at V_OUT>1.5V
±30mV Voltage Accuracy at V_OUT≤1.5V
 Fast Transient Response
 Under Voltage Lockout
 Fixed Output Voltage of UM1650S-xx and
UM1750S/Y/DA-xx from 1.0V to 4.0V with
0.1V Interval
 Adjustable Output Voltage of
UM1750S/Y/DA-00 from 1.0V to 5.0V
 Output Current Limit
 Stable with 1μF Output Capacitor
 Short-Circuit and Thermal Overload
Protection
 Low Profile SOT23-3, SOT23-5, SOT89-5
and DFN6 2.0×2.0 Packages
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http://www.union-ic.com Rev.02 Dec.2014
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