LP3964

更新时间： 2024-11-23 00:01:07

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器
页数	文件大小	规格书
21页	365K
描述
800mA Fast Ultra Low Dropout Linear Regulators

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中文翻译

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LP3964 数据手册

May 2000

LP3961/LP3964

800mA Fast Ultra Low Dropout Linear Regulators

General Description

Features

n Ultra low dropout voltage

n Low ground pin current

The LP3961/LP3964 series of fast ultra low-dropout linear

regulators operate from a +2.5V to +7.0V input supply. Wide

range of preset output voltage options are available. These

ultra low dropout linear regulators respond very fast to step

changes in load which makes them suitable for low voltage

microprocessor applications. The LP3961/LP3964 are de-

veloped on a CMOS process which allows low quiescent

current operation independent of output load current. This

CMOS process also allows the LP3961/LP3964 to operate

under extremely low dropout conditions.

n Load regulation of 0.02%

n 15µA quiescent current in shutdown mode

n Guaranteed output current of 0.8A DC

n Available in SOT-223,TO-263 and TO-220 packages

n Output voltage accuracy 1.5%

n Error flag indicates output status (LP3961)

n Sense option improves better load regulation (LP3964)

n Extremely low output capacitor requirements

n Overtemperature/overcurrent protection

Dropout Voltage: Ultra low dropout voltage; typically 24mV

at 80mA load current and 240mV at 800mA load current.

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

Ground Pin Current: Typically 4mA at 800mA load current.

Shutdown Mode: Typically 15µA quiescent current when

the shutdown pin is pulled low.

Applications

n Microprocessor power supplies

n GTL, GTL+, BTL, and SSTL bus terminators

n Power supplies for DSPs

n SCSI terminator

Error Flag: Error flag goes low when the output voltage

drops 10% below nominal value (for LP3961).

SENSE: Sense pin improves regulation at remote loads.

(For LP3964)

n Post regulators

Precision Output Voltage: Multiple output voltage options

n High efficiency linear regulators

n Battery chargers

are available ranging from 1.2V to 5.0V and adjustable, with

a guaranteed accuracy of 1.5% at room temperature, and

3.0% over all conditions ( varying line, load, and tempera-

n Other battery powered applications

ture).

Typical Application Circuits

DS101129-1

# Minimum output capacitance is 10 µF to ensure stability over full load current range. More capacitance provides superior dynamic performance and additional

stability margin.

*SD and ERROR pins must be pulled high through a 10kΩ pull-up resistor. Connect the ERROR pin to ground if this function is not used. See applications sec-

tion for more information.

DS101129

www.national.com

12 3 4 5 6 7...21

中文翻译

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与LP3964相关器件

型号	品牌	获取价格	描述	数据表
LP3964EMP-1.8	NSC	获取价格	800mA Fast Ultra Low Dropout Linear Regulators
LP3964EMP-1.8	TI	获取价格	1.8V FIXED POSITIVE LDO REGULATOR, 0.7V DROPOUT, PDSO5, SOT-223, 5 PIN
LP3964EMP-1.8/NOPB	TI	获取价格	LP396x 800-mA Fast Ultra-Low-Dropout Linear Regulators
LP3964EMP-2.5	NSC	获取价格	800mA Fast Ultra Low Dropout Linear Regulators
LP3964EMP-2.5	TI	获取价格	LP396x 800-mA Fast Ultra-Low-Dropout Linear Regulators
LP3964EMP-2.5/NOPB	ROCHESTER	获取价格	2.5V FIXED POSITIVE LDO REGULATOR, 0.35V DROPOUT, PDSO5, SOT-223, 5 PIN
LP3964EMP-2.5/NOPB	TI	获取价格	LP396x 800-mA Fast Ultra-Low-Dropout Linear Regulators
LP3964EMP-3.3	NSC	获取价格	800mA Fast Ultra Low Dropout Linear Regulators
LP3964EMP-3.3/NOPB	NSC	获取价格	IC VREG 3.3 V FIXED POSITIVE LDO REGULATOR, 0.35 V DROPOUT, PDSO5, SOT-223, 5 PIN, Fixed P
LP3964EMP-3.3/NOPB	ROCHESTER	获取价格	3.3V FIXED POSITIVE LDO REGULATOR, 0.35V DROPOUT, PDSO5, SOT-223, 5 PIN

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