LM2733XMF+ National Semiconductor, LM2733XMF+ Datasheet

LM2733XMF+

Manufacturer Part Number

LM2733XMF+

Description

Manufacturer

National Semiconductor

Datasheets

1.LM2733YMFX.pdf (16 pages)

2.LM2733XMF.pdf (13 pages)

Specifications of LM2733XMF+

Notes

NEW

Date_code

10+

Current page: 1 of 13
Download datasheet (508Kb)

LM2733

0.6/1.6 MHz Boost Converters With 40V Internal FET

Switch in SOT-23

General Description

The LM2733 switching regulators are current-mode boost

converters operating fixed frequency of 1.6 MHz (“X” option)

and 600 kHz (“Y” option).

The use of SOT-23 package, made possible by the minimal

power loss of the internal 1A switch, and use of small induc-

tors and capacitors result in the industry’s highest power

density. The 40V internal switch makes these solutions per-

fect for boosting to voltages of 16V or greater.

These parts have a logic-level shutdown pin that can be

used to reduce quiescent current and extend battery life.

Protection is provided through cycle-by-cycle current limiting

and thermal shutdown. Internal compensation simplifies de-

sign and reduces component count.

Typical Application Circuit

1.6 MHz

Switch Frequency

0.6 MHz

DS200554

20055424

20055401

Features

n 40V DMOS FET switch

n 1.6 MHz (“X”), 0.6 MHz (“Y”) switching frequency

n Low R

n Switch current up to 1A

n Wide input voltage range (2.7V–14V)

n Low shutdown current (

n 5-Lead SOT-23 package

n Uses tiny capacitors and inductors

n Cycle-by-cycle current limiting

n Internally compensated

Applications

n White LED Current Source

n PDA’s and Palm-Top Computers

n Digital Cameras

n Portable Phones and Games

n Local Boost Regulator

(ON) DMOS FET

1 µA)

20055457

20055458

February 2003

www.national.com

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