Datasheet > UM1770DA-10

UM1770DA-10

更新时间： 2024-10-16 00:28:03

品牌	Logo	应用领域
英联电子 - UNIONSEMI		/
页数	文件大小	规格书
13页	847K
描述
500mA, Micropower, VLDO Linear Regulator

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UM1770DA-10 数据手册

UM1770

500mA, Micropower, VLDO Linear Regulator

UM1770Y-xx SOT89-5

UM1770DA-xx DFN6 2.0×2.0

General Description

The UM1770 series are VLDO (very low dropout) linear regulators designed for low power

portable applications. Typical output noise is only 90μV_RMS(Fixed Output, V_OUT=1.0V) and

maximum dropout is just 320mV at the load current of 500mA.The internal P-channel MOSFET

pass transistor requires no base current, allowing the device to draw only 250μA during normal

operation at the maximum load current of 500mA.

Other features include high output voltage accuracy, excellent transient response, under voltage

lockout, stability with ultra low ESR ceramic capacitors as small as 1μF, short-circuit and thermal

overload protection and output current limiting.

The UM1770Y-xx series are available in SOT89-5 package and the UM1770DA-xx series are

available in a low profile DFN6 2.0×2.0 package.

Applications

Features



Very Low Dropout: 320mV(max) at 500mA

Maximum Input Voltage: 6.0V



Bluetooth/802.11 Cards

PDAs and Notebook Computers

Portable Instruments and

Battery-Powered Systems

Cellular Phones



Low Noise (10Hz to 100kHz):

90μV_RMS(Fixed Output, V_OUT=1.0V);

60μV_RMS(Adjustable Output, V_OUT=1.0V);

194μV_RMS(Adjustable Output, V_OUT=3.3V);



305μV_RMS(Adjustable Output, V_OUT=5.0V)

±2% Voltage Accuracy at 500mA

Fast Transient Response



Under Voltage Lockout

Fixed Output Voltage of UM1770Y/DA-xx:

1.0V to 4.0V with 0.1V Interval

Adjustable Output Voltage of

UM1770Y/DA-00:



1.0V to 5.0V



Output Current Limit

Stable with 1μF Output Capacitor

Short-Circuit and Thermal Overload

Protection



Low Profile SOT89-5 and DFN6 2.0×2.0

Packages

________________________________________________________________________

http://www.union-ic.com Rev.05 Jan.2015 1/13

12 3 4 5 6 7...13

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