Datasheet > LM3488_05

LM3488_05

更新时间： 2024-11-23 04:44:27

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器开关控制器
页数	文件大小	规格书
24页	1002K
描述
High Efficiency Low-Side N-Channel Controller for Switching Regulators

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LM3488_05 数据手册

May 2005

LM3488

High Efficiency Low-Side N-Channel Controller for

Switching Regulators

1.5% (over temperature) internal reference

General Description

n 5µA shutdown current (over temperature)

The LM3488 is a versatile Low-Side N-FET high perfor-

mance controller for switching regulators. It is suitable for

use in topologies requiring low side FET, such as boost,

flyback, SEPIC, etc. Moreover, the LM3488 can be operated

at extremely high switching frequency in order to reduce the

overall solution size. The switching frequency of LM3488 can

be adjusted to any value between 100kHz and 1MHz by

using a single external resistor or by synchronizing it to an

external clock. Current mode control provides superior band-

width and transient response, besides cycle-by-cycle current

limiting. Output current can be programmed with a single

external resistor.

Features

n 8-lead Mini-SO8 (MSOP-8) package

n Internal push-pull driver with 1A peak current capability

n Current limit and thermal shutdown

n Frequency compensation optimized with a capacitor and

a resistor

n Internal softstart

n Current Mode Operation

n Undervoltage Lockout with hysteresis

The LM3488 has built in features such as thermal shutdown,

short-circuit protection and over voltage protection. Power

saving shutdown mode reduces the total supply current to

5µA and allows power supply sequencing. Internal soft-start

limits the inrush current at start-up.

Applications

n Distributed Power Systems

n Notebook, PDA, Digital Camera, and other Portable

Applications

n Offline Power Supplies

n Set-Top Boxes

Key Specifications

n Wide supply voltage range of 2.97V to 40V

n 100kHz to 1MHz Adjustable and Synchronizable clock

frequency

Typical Application Circuit

10138844

Typical SEPIC Converter

DS101388

www.national.com

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LM3488MMX	NSC	获取价格	High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488MMX/NOPB	TI	获取价格	2.97V to 40V Wide Vin Low-Side N-Channel Controller for Switching Regulators 8-VSSOP -40 t
LM3488Q	NSC	获取价格	High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488-Q1	TI	获取价格	High Efficiency Low-Side N-Channel Controller for Switching Regulators