Datasheet > LP3981

LP3981

更新时间： 2024-11-14 22:13:47

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
11页	337K
描述
Micropower, 300mA Ultra Low-Dropout CMOS Voltage

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LP3981 数据手册

March 2003

LP3981

Micropower, 300mA Ultra Low-Dropout CMOS Voltage

Regulator

n 60dB PSRR at 1kHz

n ≤1µA quiescent current when shut down

n Fast Turn-On time: 120 µs (typ.) with C_BYPASS= 0.01uF

n 132mV typ dropout with 300mA load

General Description

The LP3981’s performance is optimized for battery powered

systems to deliver ultra low noise, extremely low dropout

voltage and low quiescent current. Regulator ground current

n 35µVrms output noise over 10Hz to 100kHz

n −40 to +125˚C junction temperature range for operation

n 2.5V, 2.7V, 2.8V, 2.83V, 3.0V, 3.03V, and 3.3V outputs

standard

increases only slightly in dropout, further prolonging the

battery life.

Power supply rejection is better than 60 dB at low frequen-

cies. This high power supply rejection is maintained down to

lower input voltage levels common to battery operated cir-

cuits.

Features

The device is ideal for mobile phone and similar battery

powered wireless applications. It provides up to 300 mA,

from a 2.5V to 6V input, consuming less than 1µA in disable

mode.

n Small, space saving MSOP-8

n Low Thermal Resistance in LLP-6 package gives

excellent power capability

n Logic controlled enable

The LP3981 is available in MSOP-8 package. For LP3981 in

LLP-6 package, contact NSC sales offices. Performance is

specified for −40˚C to +125˚C temperature range. The de-

vice available in the following output voltages; 2.5V, 2.7V,

2.8V, 2.83V, 3.0V, 3.03V and 3.3V as standard. Other output

options can be made available, please contact your local

NSC sales office.

n Stable with ceramic and high quality tantalum capacitors

n Fast turn-on

n Thermal shutdown and short-circuit current limit

Applications

n CDMA cellular handsets

n Wideband CDMA cellular handsets

n GSM cellular handsets

n Portable information appliances

n Tiny 3.3V 5% to 2.5V, 300mA converter

Key Specifications

n 2.5 to 6.0V input range

n 300mA guaranteed output

Typical Application Circuit

20020302

Note: Pin Numbers in parenthesis indicate LLP-6 package.

DS200203

www.national.com

12 3 4 5 6 7...11

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与LP3981相关器件

型号	品牌	获取价格	描述	数据表
LP3981-12B5F		获取价格	300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator
LP3981-15B5F		获取价格	300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator
LP3981-18B5F		获取价格	300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator
LP3981-25B5F		获取价格	300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator
LP3981-28B5F		获取价格	300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator
LP3981-30B5F		获取价格	300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator
LP3981-33B5F		获取价格	300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator
LP3981-50B5F		获取价格	300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator
LP3981H	LOWPOWER	获取价格	Shutdown,High PSRR
LP3981ILD-2.5	NSC	获取价格	Micropower, 300mA Ultra Low-Dropout CMOS Voltage

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