Datasheet > LP38843T-1.5

LP38843T-1.5

更新时间： 2024-11-14 03:00:47

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器电容器
页数	文件大小	规格书
11页	633K
描述
3A Ultra Low Dropout Linear Regulators Stable with Ceramic Output Capacitors

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LP38843T-1.5 数据手册

December 2004

LP38843

3A Ultra Low Dropout Linear Regulators

Stable with Ceramic Output Capacitors

General Description

Features

n Ideal for conversion from 1.8V or 1.5V inputs

n Designed for use with low ESR ceramic capacitors

n 0.8V, 1.2V and 1.5V standard voltages available

The LP38843 is a high-current, fast-response regulator

which can maintain output voltage regulation with minimum

input to output voltage drop. Fabricated on a CMOS process,

the device operates from two input voltages: Vbias provides

voltage to drive the gate of the N-MOS power transistor,

while Vin is the input voltage which supplies power to the

load. The use of an external bias rail allows the part to

operate from ultra low Vin voltages. Unlike bipolar regula-

tors, the CMOS architecture consumes extremely low quies-

cent current at any output load current. The use of an

N-MOS power transistor results in wide bandwidth, yet mini-

mum external capacitance is required to maintain loop sta-

bility.

n Ultra low dropout voltage (210mV 3A typ)

n 1.5% initial output accuracy

n Load regulation of 0.1%/A (typical)

n 30nA quiescent current in shutdown (typical)

n Low ground pin current at all loads

n Over temperature/over current protection

n Available in 5 lead TO220 and TO263 packages

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

The fast transient response of these devices makes them

suitable for use in powering DSP, Microcontroller Core volt-

ages and Switch Mode Power Supply post regulators. The

parts are available in TO-220 and TO-263 packages.

Applications

n ASIC Power Supplies In:

- Desktops, Notebooks, and Graphics Cards, Servers

- Gaming Set Top Boxes, Printers and Copiers

n Server Core and I/O Supplies

Dropout Voltage: 210 mV (typ) 3A load current.

Quiescent Current: 30 mA (typ) at full load.

n DSP and FPGA Power Supplies

n SMPS Post-Regulator

Shutdown Current: 30 nA (typ) when S/D pin is low.

Precision Output Voltage: 1.5% room temperature accu-

racy.

Typical Application Circuit

20102901

* Minimum value required if Tantalum capacitor is used (see Application Hints).

DS201029

www.national.com

12 3 4 5 6 7...11

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与LP38843T-1.5相关器件

型号	品牌	获取价格	描述	数据表
LP38843T-1.5/NOPB	NSC	获取价格	IC VREG 1.5 V FIXED POSITIVE LDO REGULATOR, 0.5 V DROPOUT, PSFM5, TO-220, 5 PIN, Fixed Pos
LP38843T-1.5/NOPB	TI	获取价格	3A Ultra Low Dropout Linear Regulators Stable with Ceramic Output Capacitors
LP38843T-1.5LB03	NSC	获取价格	IC VREG 1.5 V FIXED POSITIVE LDO REGULATOR, 0.5 V DROPOUT, PSFM5, TO-220, 5 PIN, Fixed Pos
LP38851	TI	获取价格	LP38851 800 mA Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and
LP38851	NSC	获取价格	800 mA Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and Soft-St
LP38851MR-ADJ	NSC	获取价格	800 mA Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and Soft-St
LP38851MR-ADJ	TI	获取价格	LP38851 800 mA Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and
LP38851MR-ADJ/NOPB	TI	获取价格	LP38851 800 mA Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and
LP38851MRX-ADJ	TI	获取价格	LP38851 800 mA Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and
LP38851MRX-ADJ	NSC	获取价格	800 mA Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and Soft-St

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