LM2733

³;´

SW

FB

GND

SHDN

U1

R3

51K

SHDN

GND

C1

2.22F

R2

13.3K

CF

220pF

D1

MBR0520

R1/117K

L1/102H

C2

4.72F

12V

OUT

330mA

(TYP)

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LM2733

SNVS209F – NOVEMBER 2002 – REVISED DECEMBER 2014

LM2733 0.6 and 1.6-MHz Boost Converters With 40-V Internal FET Switch in SOT-23

1 Features

3 Description

The LM2733 switching regulators are current-mode

1

•

40-V DMOS FET Switch

boost converters operating fixed frequency of 1.6

•

1.6 MHz (“X”), 0.6 MHz (“Y”) Switching Frequency

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

•

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

•

Switch Current up to 1A

minimal power loss of the internal 1-A switch, and

•

Wide Input Voltage Range (2.7 V – 14 V)

use of small inductors and capacitors result in the

industry's highest power density. The 40-V internal

•

Low Shutdown Current (< 1 µA)

switch makes these solutions perfect for boosting to

•

5-Lead SOT-23 Package

voltages of 16 V or greater.

•

Uses Tiny Capacitors and Inductors

These parts have a logic-level shutdown pin that can

•

Cycle-by-Cycle Current Limiting

be used to reduce quiescent current and extend

•

Internally Compensated

battery life.

Protection is provided through cycle-by-cycle current

2 Applications

limiting and thermal shutdown. Internal compensation

•

White LED Current Source

simplifies design and reduces component count.

•

PDA’s and Palm-Top Computers

Device Information(1)

•

Digital Cameras

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Portable Phones and Games

LM2733

SOT-23 (5)

2.90 mm x 1.60 mm

•

Local Boost Regulator

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

the end of the datasheet.

Typical Application Circuit

Efficiency vs. Load Current

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.