Datasheet > LP38856

LP38856

更新时间： 2024-09-21 04:44:07

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
14页	835K
描述
3A Fast-Response High-Accuracy LDO Linear Regulator with Enable

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LP38856 数据手册

June 2006

LP38856

3A Fast-Response High-Accuracy LDO Linear Regulator

with Enable

General Description

Features

n Standard V_OUTvalues of 0.8V and 1.2V

n Stable with 10 µF ceramic capacitors

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

n Precision Output Voltage across all line and load

conditions:

The LP38856 is a high-current, fast-response regulator

which can maintain output voltage regulation with an ex-

tremely low input to output voltage drop. Fabricated on a

CMOS process, the device operates from two input voltages:

V_BIASprovides power for the internal bias and control cir-

cuits, as well as drive for the gate of the N-MOS power

transistor, while V_INsupplies 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 architec-

ture consumes extremely low quiescent current at any out-

put load current. The use of an N-MOS power transistor

results in wide bandwidth, yet minimum external capacitance

is required to maintain loop stability.

—

1.0% for T_J= 25˚C

2.0% for 0˚C ≤ T_J≤ +125˚C

3.0% for -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 LP38856 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.

Shutdown Current: 1 µA (typical) I_IN(GND)when EN pin is

low.

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

20131101

DS201311

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与LP38856相关器件

型号	品牌	获取价格	描述	数据表
LP38856_15	TI	获取价格	3A Fast-Response High-Accuracy LDO Linear Regulator With Enable
LP38856S-0.8	NSC	获取价格	3A Fast-Response High-Accuracy LDO Linear Regulator with Enable
LP38856S-0.8/NOPB	TI	获取价格	3A Fast-Response High-Accuracy LDO Linear Regulator With Enable
LP38856S-1.2	NSC	获取价格	3A Fast-Response High-Accuracy LDO Linear Regulator with Enable
LP38856S-1.2/NOPB	TI	获取价格	3A Fast-Response High-Accuracy LDO Linear Regulator With Enable
LP38856SX-0.8	NSC	获取价格	3A Fast-Response High-Accuracy LDO Linear Regulator with Enable
LP38856SX-1.2	NSC	获取价格	3A Fast-Response High-Accuracy LDO Linear Regulator with Enable
LP38856SX-1.2/NOPB	TI	获取价格	3A Fast-Response High-Accuracy LDO Linear Regulator With Enable
LP38856T-0.8	NSC	获取价格	3A Fast-Response High-Accuracy LDO Linear Regulator with Enable
LP38856T-1.2	NSC	获取价格	3A Fast-Response High-Accuracy LDO Linear Regulator with Enable

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