LM3102

更新时间： 2024-11-23 04:20:11

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
18页	378K
描述
SIMPLE SWITCHER㈢ Synchronous 1MHz 2.5A Step-Down Voltage Regulator

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LM3102 数据手册

September 2007

LM3102

SIMPLE SWITCHER® Synchronous 1MHz 2.5A

Step-Down Voltage Regulator

General Description

Features

The LM3102 Synchronously Rectified Buck Converter fea-

tures all required functions to implement a highly efficient and

cost effective buck regulator. It is capable of supplying 2.5A

to loads with an output voltage as low as 0.8V. Dual N-Chan-

nel synchronous MOSFET switches allow a low component

count, thus reducing complexity and minimizing board size.

Low component count and small solution size

Stable with ceramic and other low ESR capacitors

No loop compensation required

High efficiency at a light load by DCM operation

Pre-bias startup

■

Ultra-fast transient response

Different from most other COT regulators, the LM3102 does

not rely on output capacitor ESR for stability, and is designed

to work exceptionally well with ceramic and other very low

ESR output capacitors. It requires no loop compensation, re-

sults in a fast load transient response and simple circuit

implementation. The operating frequency remains nearly con-

stant with line variations due to the inverse relationship be-

tween the input voltage and the on-time. The operating

frequency can be externally programmed up to 1 MHz. Pro-

tection features include V_CCunder-voltage lock-out, output

over-voltage protection, thermal shutdown, and gate drive

under-voltage lock-out. The LM3102 is available in the ther-

mally enhanced eTSSOP-20 package.

Programmable soft-start

Programmable switching frequency up to 1 MHz

Valley current limit

Output over-voltage protection

Precision internal reference for an adjustable output

voltage down to 0.8V

Thermal shutdown

■

Typical Applications

5VDC, 12VDC, 24VDC, 12VAC, and 24VAC systems

■

Embedded Systems

Key Specifications

Industrial Control

Automotive Telematics and Body Electronics

Input voltage range 4.5V-42V

■

Point of Load Regulators

2.5A output current

Storage Systems

0.8V, ±1.5% reference

Broadband Infrastructure

Integrated dual N-Channel main and synchronous

MOSFETs

Direct Conversion from 2/3/4 Cell Lithium Batteries

Systems

Thermally enhanced eTSSOP-20 package

■

Typical Application

30021301

SIMPLE SWITCHER® is a registered trademark of National Semiconductor Corporation

300213

www.national.com

12 3 4 5 6 7...18

中文翻译

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与LM3102相关器件

型号	品牌	获取价格	描述	数据表
LM3102_15	TI	获取价格	LM3102/-Q1 SIMPLE SWITCHERÂ® Synchronous 1-MH
LM3102MH	NSC	获取价格	SIMPLE SWITCHER㈢ Synchronous 1MHz 2.5A Step-D
LM3102MH/NOPB	TI	获取价格	LM3102/-Q1 SIMPLE SWITCHERÂ® Synchronous 1-MH
LM3102MH/NOPB	NSC	获取价格	IC SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO20, PLASTIC, TSSOP-20, Switching
LM3102MHX	NSC	获取价格	SIMPLE SWITCHER㈢ Synchronous 1MHz 2.5A Step-D
LM3102MHX/NOPB	NSC	获取价格	IC SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO20, LEAD FREE, PLASTIC, TSSOP-20,
LM3102MHX/NOPB	TI	获取价格	LM3102/-Q1 SIMPLE SWITCHERÂ® Synchronous 1-MH
LM3102-Q1	TI	获取价格	LM3102/-Q1 SIMPLE SWITCHERÂ® Synchronous 1-MH
LM3102QMH/NOPB	TI	获取价格	LM3102/-Q1 SIMPLE SWITCHERÂ® Synchronous 1-MH
LM3102QMHX/NOPB	TI	获取价格	LM3102/-Q1 SIMPLE SWITCHERÂ® Synchronous 1-MH

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