LM3488MM+ National Semiconductor, LM3488MM+ Datasheet

LM3488MM+

Manufacturer Part Number

LM3488MM+

Description

Manufacturer

National Semiconductor

Datasheet

1.LM3488MM.pdf (24 pages)

Specifications of LM3488MM+

Notes

NEW

Date_code

10+

Current page: 1 of 24
Download datasheet (2Mb)

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

n Wide supply voltage range of 2.97V to 40V

n 100kHz to 1MHz Adjustable and Synchronizable clock

Typical Application Circuit

frequency

DS101388

Typical SEPIC Converter

n 5µA shutdown current (over temperature)

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

n Internal softstart

n Current Mode Operation

n Undervoltage Lockout with hysteresis

Applications

n Distributed Power Systems

n Notebook, PDA, Digital Camera, and other Portable

n Offline Power Supplies

n Set-Top Boxes

a resistor

Applications

1.5% (over temperature) internal reference

www.national.com

10138844

May 2005

Related parts for LM3488MM+

Related keywords

LM3488MM+ datasheet
LM3488MM+ data sheet
LM3488MM+ pdf datasheet
LM3488MM+ component
LM3488MM+ part
LM3488MM+ distributor
LM3488MM+ RoHS
LM3488MM+ datasheet download