LT1308

更新时间： 2024-09-09 22:55:51

品牌	Logo	应用领域
凌特 - Linear		转换器
页数	文件大小	规格书
8页	270K
描述
Single Cell High Current Micropower 600kHz Boost DC/DC Converter

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Final Electrical Specifications

LT1308

Single Cell High Current

Micropower 600kHz

Boost DC/DC Converter

January 1998

DESCRIPTION

FEATURES

The LT^®1308 is a micropower, fixed frequency boost

DC/DC converter that operates from an input voltage as

low as 1V. Capable of delivering 5V at load current of 1A

from a single Li-Ion cell, the LT1308 also features power

savingBurstModeoperationatlightloads. Highefficiency

is maintained over a broad 1mA to 1A load range.

■

5V at 1A from a Single Li-Ion Cell

■

3.3V at 300mA from a Single NiCd Cell

■

Low Quiescent Current: 100µA

■

Operates with V_INas Low as 1V

■

Fixed Frequency Operation: 600kHz

■

Current Mode PWM Delivers Low Output Ripple

■

Guaranteed Start-Up into Full Load

The device contains a low-battery detector with a 200mV

reference and shuts down to less than 5µA quiescent

current. No-load quiescent current is 100µA and the

internal NPN power switch handles a 2A current with a

voltage drop of just 300mV.

■

Low Shutdown Current: 3µA

■

Low-Battery Comparator

Automatic Burst Mode^TMOperation at Light Load

■

Low V_CESAT

^SwitU^{ch: 300mV at 2A}

High frequency 600kHz switching allows the use of small,

surface mount components. The LT1308’s current mode

architecture provides fast response to load and line varia-

tions. The device is available in an 8-lead SO package.

APPLICATIONS

■

GSM Terminals

Digital Cameras

Answer-Back Pagers

Cordless Telephones

DECT Phones

GPS Receivers

■

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

Burst Mode is a trademark of Linear Technology Corporation.

■

Battery Backup Supplies

TYPICAL APPLICATION

Converter Efficiency

4.2V TO 3V

= 3.6V

4.7µH

SHDN

LBI

= 4.2V

301k

LT1308

Li-Ion

CELL

10µF

LBO

GND

= 3V

100µF

100k

47k

22nF

1308F01

C1: CERAMIC

C2: AVX TPS SERIES

100

1000

D1: INTERNATIONAL RECTIFIER 10BQ015

L1: COILTRONICS CTX5-1

LOAD CURRENT (mA)

1308 F01a

COILCRAFT DO3316-472

Figure 1. Single Li-Ion Cell to 5V/1A DC/DC Converter

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.

12 3 4 5 6 7 8

中文翻译

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与LT1308相关器件

型号	品牌	获取价格	描述	数据表
LT1308A	Linear	获取价格	High Current, Micropower Single Cell, 600kHz DC/DC Converters
LT1308A	ADI	获取价格	大电流、微功率、单电池、600kHz DC/DC 变换器
LT1308A_1	Linear	获取价格	High Current, Micropower Single Cell, 600kHz DC/DC Converters
LT1308A_15	Linear	获取价格	High Current, Micropower Single Cell, 600kHz DC/DC Converters
LT1308ACF	Linear	获取价格	High Current, Micropower Single Cell, 600kHz DC/DC Converters
LT1308ACF#PBF	Linear	获取价格	IC 4.5 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, PDSO14, 4.40 MM, LEAD FREE, PLAS
LT1308ACF#TR	Linear	获取价格	IC 4.5 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, PDSO14, 4.40 MM, PLASTIC, TSSOP-
LT1308ACF#TRPBF	Linear	获取价格	IC 4.5 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, PDSO14, 4.40 MM, LEAD FREE, PLAS
LT1308ACF-PBF	Linear	获取价格	High Current, Micropower Single Cell, 600kHz DC/DC Converters
LT1308ACF-TR	Linear	获取价格	High Current, Micropower Single Cell, 600kHz DC/DC Converters

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