LM3488

更新时间： 2024-11-22 22:51:55

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	620K
描述
High Efficiency Low-Side N-Channel Controller for Switching Regulators

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM3488 数据手册

May 2003

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

12 3 4 5 6 7...24

中文翻译

下载PDF

与LM3488相关器件

型号	品牌	获取价格	描述	数据表
LM3488_05	NSC	获取价格	High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488_09	NSC	获取价格	High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488MM	TI	获取价格	High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488MM	NSC	获取价格	High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488MM/NOPB	NSC	获取价格	IC 1 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO8, MSOP-8, Switching Regulat
LM3488MM/NOPB	TI	获取价格	适用于开关稳压器的 2.97V 至 40V 宽输入电压低侧 N 沟道控制器 \| DGK \|
LM3488MMX	TI	获取价格	High Efficiency Low-Side N-Channel Controller for Switching Regulators
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