LTC1872ES6

更新时间： 2024-02-27 19:42:48

品牌	Logo	应用领域
凌特 - Linear		控制器
页数	文件大小	规格书
12页	183K
描述
Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23

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LTC1872ES6 数据手册

LTC1872

Constant Frequency

Current Mode Step-Up

DC/DC Controller in SOT-23

FEATURES

DESCRIPTIO

The LTC^®1872 is a constant frequency current mode step-

up DC/DC controller providing excellent AC and DC load

and line regulation. The device incorporates an accurate

undervoltagelockoutfeaturethatshutsdowntheLTC1872

when the input voltage falls below 2.0V.

■

High Efficiency: Over 90%

■

High Output Currents Easily Achieved

■

Wide V_INRange: 2.5V to 9.8V

■

V_OUTLimited Only by External Components

■

Constant Frequency 550kHz Operation

Burst Mode^TMOperation at Light Load

■

TheLTC1872boastsa±2.5%outputvoltageaccuracyand

consumes only 270µA of quiescent current. For applica-

tionswhereefficiencyisaprimeconsideration,theLTC1872

is configured for Burst Mode operation, which enhances

efficiency at low output current.

■

Current Mode Operation for Excellent Line and Load

Transient Response

Low Quiescent Current: 270µA

Shutdown Mode Draws Only 8µA Supply Current

±2.5% Reference Accuracy

Tiny 6-Lead SOT-23 Package

■

In shutdown, the device draws a mere 8µA. The high

550kHz constant operating frequency allows the use of a

small external inductor.

APPLICATIO S

The LTC1872 is available in a small footprint 6-lead

SOT-23.

■

Lithium-Ion-Powered Applications

■

Cellular Telephones

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

Burst Mode is a trademark of Linear Technology Corporation.

■

Wireless Modems

■

Portable Computers

■

Scanners

TYPICAL APPLICATION

Efficiency vs Load Current

3.3V

10µF

10V

100

0.03Ω

= 3.3V

= 5V

OUT

147k

4.7µH

/RUN

–

LTC1872

220pF

80.6k

OUT

GND

SENSE

NGATE

2× 22µF

6.3V

422k

C1: TAIYO YUDEN CERAMIC EMK325BJ106MNT

C2: MURATA GRM42-2X5R226K6.3

D1: IR10BQ015

L1: MURATA LQN6C4R7M04

M1: IRLMS2002

R1: DALE 0.25W

1872 TA01

100

1000

LOAD CURRENT (mA)

Figure 1. LTC1872 High Output Current 3.3V to 5V Boost Converter

1872 TA01b

12 3 4 5 6 7...12

中文翻译

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与LTC1872ES6相关器件

型号	品牌	获取价格	描述	数据表
LTC1872ES6#TR	Linear	获取价格	LTC1872 - Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23; Package: SOT
LTC1872ES6#TRMPBF	Linear	获取价格	LTC1872 - Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23; Package: SOT
LTC1872ES6#TRPBF	Linear	获取价格	LTC1872 - Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23; Package: SOT
LTC1873	Linear	获取价格	Dual 550kHz Synchronous 2-Phase Switching Regulator Controller with 5-Bit VID
LTC1873	ADI	获取价格	带 5 位 VID 的 550kHz 同步式两相双通道开关稳压器
LTC1873EG	Linear	获取价格	Dual 550kHz Synchronous 2-Phase Switching Regulator Controller with 5-Bit VID
LTC1873EG#PBF	Linear	获取价格	LTC1873 - Dual 550kHz Synchronous 2-Phase Switching Regulator Controller with 5-Bit VID; P
LTC1873EG#TR	Linear	获取价格	LTC1873 - Dual 550kHz Synchronous 2-Phase Switching Regulator Controller with 5-Bit VID; P
LTC1873EG#TRPBF	Linear	获取价格	LTC1873 - Dual 550kHz Synchronous 2-Phase Switching Regulator Controller with 5-Bit VID; P
LTC1874	Linear	获取价格	Dual Constant Frequency Current Mode Step-Down DC/DC Controller

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