LTC1986 3V/5V SIM Power Supply in ThinSOT

The LTC®1986 is a micropower charge pump DC/DC converter that provides power for either 3V or 5V GSM SIM cards. It operates in one of three modes: VOUT = 5V (5V mode), VOUT = VIN (3V mode) or shutdown. The input voltage range is 2.6V to 4.4V and the part can provide 10mA of output current. The LTC1986 allows VIN to drop as low as 2.6V by providing a boost feature in 3V mode. In 3V mode, VOUT is connected directly to VIN through a 2.5W switch until VIN drops below 2.85V. When VIN is below 2.85V, the part automatically boosts VOUT to maintain a regulated 2.9V output, thereby ensuring VOUT stays within the 3V SIM VCC specification.

Extremely low operating current (14µA typical with no load) and low external parts count make the part ideally suited for small, light load battery-powered applications. The total PCB area of the application circuit shown below is less than 0.045in². Protection features include inrush current limiting, undervoltage lockout, short circuit and thermal overload protection. The LTC1986 is available in a low profile (1mm) SOT-23 package

产品特点 Features

VIN Range: 2.6V to 4.4V
Ultralow Power
Operating Current: 14µA
Shutdown Current: <1µA
No Inductors
Short-Circuit/Thermal Protected
Ultrasmall Application Circuit (<0.045in² )
Low Profile (1mm) ThinSOT™
Step-Up Charge Pump Generates 5V
Output Current: 10mA
VIN to VOUT Direct Connection for 3V SIMs
Switching Frequency: 900kHz
Soft-Start Limits Inrush Current at Turn-On
Output Driven to Ground During Shutdown

应用

GSM Cellular Telephones
PCS/DCS Cellular Telephones
Portable POS Terminals

典型应用图

参数

LTC1986 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) *
LTC1986ES6	SOT	6	E	$1.70
LTC1986ES6#PBF	SOT	6	E	$1.70
LTC1986ES6#TR	SOT	6	E	$1.70	$1.43
LTC1986ES6#TRM	SOT	6	E	$1.70	$1.48
LTC1986ES6#TRMPBF	SOT	6	E	$1.70	$1.48
LTC1986ES6#TRPBF	SOT	6	E	$1.70	$1.43

LTC1986 数据手册及相关资料下载

数据手册(英文) : LTC1986 - 3V/5V SIM Power Supply in ThinSOTPDF
可靠性数据 : R415 Reliability Data .PDF