LM3488_05 datasheet(1/24 Pages) NSC | High Efficiency Low-Side N-Channel Controller for Switching Regulators

1 page

LM3488

High Efficiency Low-Side N-Channel Controller for

Switching Regulators

General Description

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.

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.

Key Specifications

Wide supply voltage range of 2.97V to 40V

100kHz to 1MHz Adjustable and Synchronizable clock

frequency

n ±

1.5% (over temperature) internal reference

5µA shutdown current (over temperature)

Features

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

Internal push-pull driver with 1A peak current capability

Current limit and thermal shutdown

Frequency compensation optimized with a capacitor and

a resistor

Internal softstart

Current Mode Operation

Undervoltage Lockout with hysteresis

Applications

Distributed Power Systems

Notebook, PDA, Digital Camera, and other Portable

Applications

Offline Power Supplies

Set-Top Boxes

Typical Application Circuit

10138844

Typical SEPIC Converter

May 2005

DS101388

Part Number	Components Description	Html View	Manufacturer
LM3481	High Efficiency Low-Side N-Channel Controller for Switching Regulators	Coming Soon	National Semiconductor
RJK6014DPP	Silicon N Channel MOS FET High Speed Power Switching	1 2 3 4	Renesas Technology Corp
NCP4331	Synchronous Buck Controller for High Efficiency Post Regulation	1 2 3 4 5 More	ON Semiconductor
LTC1142_00	Dual High Efficiency Synchronous Step-Down Switching Regulators	1 2 3 4 5 More	Linear Technology
LTC1148_04	High Efficiency Synchronous Step-Down Switching Regulators	1 2 3 4 5 More	Linear Technology
LTC1159_01	High Efficiency Synchronous Step-Down Switching Regulators	1 2 3 4 5 More	Linear Technology
LTC3819	2-Phase High Efficiency Step-Down Controller for Sun Server CPUs	1 2 3 4 5 More	Linear Technology
LTC1267_02	Dual High Efficiency Synchronous Step-Down Switching Regulators	1	Linear Technology
AAT3141	High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications	1 2 3 4 5 More	Advanced Analog Technology, Inc.
MBT35200MT1_05	High Current Surface Mount PNP Silicon Switching Transistor for Load Management in Portable Applications	1 2 3 4 5 More	ON Semiconductor

Related Electronics Part Number

Link URL

Sponsor of Alldatasheet