LTC1872B Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23

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 undervoltage lockout feature that shuts down the LTC1872 when the input voltage falls below 2.0V.

The LTC1872 boasts a ±2.5% output voltage accuracy and consumes only 270µA of quiescent current. For applications where efficiency is a prime consideration, the LTC1872 is configured for Burst Mode operation, which enhances efficiency at low output current.

In shutdown, the device draws a mere 8µA. The high 550kHz constant operating frequency allows the use of a small external inductor.

The LTC1872 is available in a small footprint 6-lead SOT-23

产品特点 Features

High Efficiency: Up to 90%
High Output Currents Easily Achieved
Wide VIN Range: 2.5V to 9.8V
VOUT Limited Only by External Components
Constant Frequency 550kHz Operation
Burst Mode™ Operation at Light Load
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

应用

Lithium-Ion-Powered Applications
Cellular Telephones
Wireless Modems
Portable Computers
Scanners

典型应用图

参数

LTC1872B 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC1872BES6	SOT	6	E	$2.21
LTC1872BES6#PBF	SOT	6	E	$2.21
LTC1872BES6#TR	SOT	6	E	$2.21	$1.85
LTC1872BES6#TRM	SOT	6	E	$2.21	$1.87
LTC1872BES6#TRMPBF	SOT	6	E	$2.21	$1.87
LTC1872BES6#TRPBF	SOT	6	E	$2.21	$1.85
LTC1872ES6	SOT	6	E	$2.21
LTC1872ES6#PBF	SOT	6	E	$2.21
LTC1872ES6#TR	SOT	6	E	$2.21	$1.85
LTC1872ES6#TRM	SOT	6	E	$2.21	$1.87
LTC1872ES6#TRMPBF	SOT	6	E	$2.21	$1.87
LTC1872ES6#TRPBF	SOT	6	E	$2.21	$1.85

LTC1872B 数据手册及相关资料下载

数据手册(英文) : LTC1872 - Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23.PDF
可靠性数据 : R402 Reliability Data .PDF