Datasheet > LP38855S-0.8

LP38855S-0.8

更新时间： 2024-02-10 19:00:50

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	357K
描述
1.5A Fast-Response High-Accuracy LDO Linear Regulator with Enable

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LP38855S-0.8 数据手册

December 2006

LP38855

1.5A Fast-Response High-Accuracy LDO Linear Regulator

with Enable

General Description

Features

The LP38855 is a high-current, fast-response regulator which

can maintain output voltage regulation with an extremely 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 circuits, 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 reg-

ulators, the CMOS architecture consumes extremely low qui-

escent current at any output load current. The use of an N-

MOS power transistor results in wide bandwidth, yet minimum

external capacitance is required to maintain loop stability.

Standard V_OUTvalues of 0.8V and 1.2V

■

Wide V_BIASSupply operating range of 3.0V to 5.5V

Stable with 10 µF ceramic capacitors

Dropout voltage of 130 mV (typical) at 1.5A load current

Precision Output Voltage across all line and load

conditions:

■

±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

Over-Temperature and Over-Current protection

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

Custom V_OUTvalues between 0.8V and 1.2V are available

-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 LP38855 is

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

Dropout Voltage: 130 mV (typical) at 1.5A load current.

Low Ground Pin Current: 14 mA (typical) at 1.5A load cur-

rent.

Applications

ASIC Power Supplies In:

■

- Desktops, Notebooks, and Graphics Cards, Servers

- Gaming Set Top Boxes, Printers and Copiers

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

Server Core and I/O Supplies

■

DSP and FPGA Power Supplies

SMPS Post-Regulator

Typical Application Circuit

20202601

202026

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与LP38855S-0.8相关器件

型号	品牌	获取价格	描述	数据表
LP38855S-0.8/NOPB	TI	获取价格	1.5A Fast-Response High-Accuracy LDO Linear Regulator with Enable 5-DDPAK/TO-263 -40 to 12
LP38855S-1.2	NSC	获取价格	1.5A Fast-Response High-Accuracy LDO Linear Regulator with Enable
LP38855S-1.2	TI	获取价格	1.5A Fast-Response High-Accuracy LDO Linear Regulator with Enable
LP38855S-1.2/NOPB	TI	获取价格	1.5A Fast-Response High-Accuracy LDO Linear Regulator with Enable
LP38855SX-0.8	NSC	获取价格	1.5A Fast-Response High-Accuracy LDO Linear Regulator with Enable
LP38855SX-0.8/NOPB	TI	获取价格	1.5A Fast-Response High-Accuracy LDO Linear Regulator with Enable 5-DDPAK/TO-263
LP38855SX-1.2	NSC	获取价格	1.5A Fast-Response High-Accuracy LDO Linear Regulator with Enable
LP38855SX-1.2/NOPB	TI	获取价格	1.5A Fast-Response High-Accuracy LDO Linear Regulator with Enable
LP38855T-0.8	NSC	获取价格	1.5A Fast-Response High-Accuracy LDO Linear Regulator with Enable
LP38855T-0.8	TI	获取价格	0.8V FIXED POSITIVE LDO REGULATOR, 0.18V DROPOUT, ZFM5, TO-220, 5 PIN

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