LTC3400BES6 Linear Technology Corporation, LTC3400BES6 Datasheet

LTC3400BES6

Manufacturer Part Number

LTC3400BES6

Description

Manufacturer

Linear Technology Corporation

Datasheets

1.LTC3400ES6-TRPBF.pdf (12 pages)

2.LTC3400ES6.pdf (12 pages)

3.LTC3400BES6.pdf (12 pages)

Specifications of LTC3400BES6

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FEATURES

TYPICAL APPLICATIO

APPLICATIO S

Pagers

MP3 Players

Digital Cameras

LCD Bias Supplies

Handheld Instruments

Wireless Handsets

GPS Receivers

Up to 92% Efficiency

Generates 3.3V at 100mA from a Single AA Cell

Low Start-Up Voltage: 0.85V

1.2MHz Fixed Frequency Switching

Internal Synchronous Rectifier

2.5V to 5V Output Range

Automatic Burst Mode

Continuous Switching at Light Loads (LTC3400B)

Logic Controlled Shutdown (< 1 A)

Antiringing Control Minimizes EMI

Tiny External Components

Low Profile (1mm) SOT-23 Package

Figure 1. Single Cell to 3.3V Synchronous Boost Converter

C1, C2: TAIYO-YUDEN X5R EMK316BJ475ML

L1: COILCRAFT DO160C-472

SINGLE

AA CELL

4.7 F

OFF ON

Operation (LTC3400)

4.7 H

SHDN

LTC3400

GND

OUT

1.02M

604k

3400 F01

4.7 F

3.3V

100mA

OUT

Synchronous Boost Converter

600mA, 1.2MHz Micropower

DESCRIPTIO

The LTC

quency, step-up DC/DC converters delivering high effi-

ciency in a 6-lead ThinSOT™ package. Capable of supplying

3.3V at 100mA from a single AA cell input, the devices

contain an internal NMOS switch and PMOS synchronous

rectifier.

A switching frequency of 1.2MHz minimizes solution

footprint by allowing the use of tiny, low profile inductors

and ceramic capacitors. The current mode PWM design is

internally compensated, reducing external parts count.

The LTC3400 features automatic shifting to power saving

Burst Mode operation at light loads, while the LTC3400B

features continuous switching at light loads. Antiringing

control circuitry reduces EMI concerns by damping the

inductor in discontinuous mode, and the devices feature

low shutdown current of under 1 A.

Both devices are available in the low profile (1mm)

SOT-23 package.

ThinSOT is a trademark of Linear Technology Corporation.

, LTC, LT and Burst Mode are registered trademarks of Linear Technology Corporation.

3400/LTC3400B are synchronous, fixed fre-

100

0.1

LTC3400/LTC3400B

FIGURE 1 CIRCUIT

WITH OPTIONAL SCHOTTKY DIODE

(SEE APPLICATIONS INFORMATION)

LOAD CURRENT (mA)

Efficiency

= 2.4V

in ThinSOT

= 1.5V

100

3400 F01a

1000

3400fa

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