Datasheet > LM2735_08

LM2735_08

更新时间： 2024-11-06 05:42:03

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
42页	743K
描述
520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator

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LM2735_08 数据手册

September 10, 2008

LM2735

520kHz/1.6MHz – Space-Efficient Boost and SEPIC DC-DC

Regulator

General Description

Features

The LM2735 is an easy-to-use, space-efficient 2.1A low-side

switch regulator ideal for Boost and SEPIC DC-DC regulation.

It provides all the active functions to provide local DC/DC

conversion with fast-transient response and accurate regula-

tion in the smallest PCB area. Switching frequency is inter-

nally set to either 520kHz or 1.6MHz, allowing the use of

extremely small surface mount inductor and chip capacitors

while providing efficiencies up to 90%. Current-mode control

and internal compensation provide ease-of-use, minimal

component count, and high-performance regulation over a

wide range of operating conditions. External shutdown fea-

tures an ultra-low standby current of 80 nA ideal for portable

applications. Tiny SOT23-5, LLP-6, and eMSOP-8 packages

provide space-savings. Additional features include internal

soft-start, circuitry to reduce inrush current, pulse-by-pulse

current limit, and thermal shutdown.

Input voltage range 2.7V to 5.5V

■

Output voltage range 3V to 24V

2.1A switch current over full temperature range

Current-Mode control

Logic high enable pin

Ultra low standby current of 80 nA in shutdown

170 mΩ NMOS switch

±2% feedback voltage accuracy

Ease-of-use, small total solution size

Internal soft-start

Internal compensation

Two switching frequencies

520 kHz (LM2735-Y)

1.6 MHz (LM2735-X)

Uses small surface mount inductors and chip capacitors

Tiny SOT23-5, LLP-6, and eMSOP-8 packages

Applications

LCD Display Backlighting For Portable Applications

■

OLED Panel Power Supply

USB Powered Devices

Digital Still and Video Cameras

White LED Current Source

Automotive

Typical Boost Application Circuit

20215801

Efficiency vs Load Current V_O= 1²2⁰²V¹⁵⁸¹⁵

202158

www.national.com

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