LP38859T-0.8

更新时间： 2024-11-14 03:03:31

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器软启动
页数	文件大小	规格书
14页	852K
描述
3A Fast-Response High-Accuracy LDO Linear Regulator with Soft-Start

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LP38859T-0.8 数据手册

June 2006

LP38859

3A Fast-Response High-Accuracy LDO Linear Regulator

with Soft-Start

General Description

Features

n Standard V_OUTvalues of 0.8V and 1.2V

n Stable with 10µF Ceramic capacitors

n Dropout voltage of 240 mV (typical) at 3A load current

n Precision Output Voltage across all line and load

conditions:

The LP38859 is a high current, fast response regulator

which can maintain output voltage regulation with extremely

low input to output voltage drop. Fabricated on a CMOS

process, the device operates from two input voltages: V_BIAS

provides voltage to drive the gate of the N-MOS power

transistor, while V_INis the input voltage which supplies

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

part to operate from ultra low V_INvoltages. Unlike bipolar

regulators, the CMOS architecture consumes extremely low

quiescent 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.

—

1.0% V_OUTfor T_J= 25˚C

2.0% V_OUTfor 0˚C ≤ T_J≤ +125˚C

3.0% V_OUTfor -40˚C ≤ T_J≤ +125˚C

n Over-Temperature and Over-Current protection

n Available in 5 lead TO-220 and TO-263 packages

n Custom V_OUTvalues between 0.8V and 1.2V are

available

n −40˚C to +125˚C Operating Temperature Range

The fast transient response of this device makes it suitable

for use in powering DSP, Microcontroller Core voltages and

Switch Mode Power Supply post regulators. The LP38859 is

available in TO-220 and TO-263 5-Lead 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

n DSP and FPGA Power Supplies

n SMPS Post-Regulator

Dropout Voltage: 240 mV (typical) at 3A load current.

Low Ground Pin Current: 14 mA (typical) at 3A load cur-

rent.

Soft-Start: Programmable Soft-Start time.

Precision Output Voltage: 1.0% for T_J= 25˚C and 2.0%

for 0˚C ≤ T_J≤ +125˚C, across all line and load conditions

Typical Application Circuit

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与LP38859T-0.8相关器件

型号	品牌	获取价格	描述	数据表
LP38859T-0.8/NOPB	TI	获取价格	3A Fast-Response High-Accuracy LDO Linear Regulator With Soft Start
LP38859T-1.2	NSC	获取价格	3A Fast-Response High-Accuracy LDO Linear Regulator with Soft-Start
LP38859T-1.2/NOPB	TI	获取价格	3A Fast-Response High-Accuracy LDO Linear Regulator With Soft Start
LP38869	TI	获取价格	1A FlexCap, Low-Dropout Linear Regulator with 0.75% Accuracy
LP38869_15	TI	获取价格	1A FlexCap, Low-Dropout Linear Regulator with 0.75% Accuracy
LP38869MH/NOPB	TI	获取价格	1A FlexCap, Low-Dropout Linear Regulator with 0.75% Accuracy
LP38869MHE/NOPB	TI	获取价格	1A FlexCap, Low-Dropout Linear Regulator with 0.75% Accuracy
LP38869MHX/NOPB	TI	获取价格	1A FlexCap, Low-Dropout Linear Regulator with 0.75% Accuracy
LP388F1YCHT	CTS	获取价格	Parallel - Fundamental Quartz Crystal, 38.88MHz Nom,
LP388FYXCBT	CTS	获取价格	Parallel - Fundamental Quartz Crystal, 38.88MHz Nom,

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