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UM36512S

Description
300mA, Micropower, VLDO Linear Regulator
File Size372KB,10 Pages
ManufacturerUnion Semiconductor Limited
Websitehttp://www.union-ic.com/
Shanghai Yinglian Electronic Technology Co., Ltd. was established in 2001 and is a fabless integrated circuit design company. The company is committed to the research, development, design and sales of high-performance linear and mixed-signal integrated circuits, and its products are used in various electronic devices. The products of Shanghai Yinglian Electronic Technology Co., Ltd. bridge the analog world and the digital world by detecting, measuring, amplifying, converting power and providing circuit protection.
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300mA, Micropower, VLDO Linear Regulator

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UM365XX
300mA, Micropower, VLDO Linear Regulator
UM365XXS
SOT23-3
General Description
The UM365XXS series are VLDO (very low dropout) linear regulators designed for low power
portable applications. Typical output noise is only 100μV
RMS
and 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, excellent transient response, under voltage
lockout, stability with ultralow ESR ceramic capacitors as small as 1μF, thermal overload
protection and output current limiting.
The UM365XXS series are available in a low profile SOT23-3 package.
Applications
Bluetooth/802.11 Cards
PDAs and Notebook Computers
Portable Instruments and
Battery-Powered Systems
Cellular Phones
Features
Low Dropout: 200mV(max) at 100mA
Maximum Input Voltage: 6.0V
Low Noise:100μV
RMS
(10Hz to 100kHz)
±2%Voltage Accuracy at 150mA
Fast Transient Response
Fixed Output Voltage:
5.0V/4.8V/4.7V/4.5V/4.3V/4.2V/4.0V/3.8V/
3.6V/3.5V/3.3V/3.0V/2.8V/2.7V/2.5V/1.8V/
1.5V/1.3V/1.2V
Output Current Limit
Stable with 1μF Output Capacitor
Thermal Overload Protection
Low Profile SOT23-3 Package
Pin Configurations
Top View
UM365XXS
M: Month Code
SOT23-3
________________________________________________________________________
http://www.union-ic.com Rev.01 Nov.2010
1/10
Can you please help me analyze the principle of this circuit? Thank you.
Can you please help me analyze the principle of this circuit? Thank you....
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