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LM2731

SNVS217G – MAY 2004 – REVISED SEPTEMBER 2015

LM2731 0.6/1.6-MHz Boost Converters With 22-V Internal FET Switch in SOT-23

1 Features

3 Description

The LM2731 switching regulators are current-mode

1

•

22-V DMOS FET Switch

boost converters operating at fixed frequencies of 1.6

•

1.6-MHz (X Option), 0.6-MHz (Y Option) Switching

MHz (X option) and 600 kHz (Y option).

Frequency

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

•

minimal power loss of the internal 1.8-A switch, and

•

Switch Current Up to 1.8 A

use of small inductors and capacitors result in the

•

Wide Input Voltage Range (2.7 V to 14 V)

highest power density of the industry. The 22-V

internal switch makes these solutions perfect for

•

Low Shutdown Current (<1 µA)

boosting to voltages up to 20 V.

•

5-Lead SOT-23 Package

These parts have a logic-level shutdown pin that can

•

Uses Tiny Capacitors and Inductors

reduce quiescent current and extend battery life.

•

Cycle-by-Cycle Current Limiting

Protection is provided through cycle-by-cycle current

•

Internally Compensated

limiting and thermal shutdown. Internal compensation

simplifies design and reduces component count.

2 Applications

Device Information(1)

•

White LED Current Sources

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

PDAs and Palm-Top Computers

LM2731

SOT-23 (5)

1.60 mm × 2.90 mm

•

Digital Cameras

(1) For all available packages, see the orderable addendum at

•

Portable Phones and Games

the end of the data sheet.

•

Local Boost Regulators

Block Diagram

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.