LTC1701 1MHz Step-Down DC/DC Converter in SOT-23

The LTC®1701/LTC1701B are the industry's first SOT-23 step-down, current mode, DC/DC converters. Intended for low to medium power applications, they operate from 2.5V to 5.5V input voltage range and switch at 1MHz, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. The output voltage is adjustable from 1.25V to 5V. A built-in 0.28 Ohm switch allows up to 0.5A of output current at high efficiency. OPTI-LOOP™ compensation allows the transient response to be optimized over a wide range of loads and output capacitors.

The LTC1701 incorporates automatic power saving BurstMode™ operation to reduce gate charge losses when the load current drops below the level required for continuous operation. The LTC1701B operates continuously to very low load currents to provide low ripple at the expense of light load efficiency. With no load, the LTC1701 draws only 135µA. In shutdown, both devices draw less than 1µA, making them ideal for current sensitive applications.

Their small size and switching frequency enables a complete DC/DC converter function to consume less than 0.3 square inches of PC board area

产品特点 Features

Tiny 5-Lead SOT-23 Package
Uses Tiny Capacitors and Inductor
High Frequency Operation: 1MHz
High Output Current: 500mA
Low RDS(ON) Internal Switch: 0.28 Ohms
High Efficiency: Up to 94%
Current Mode Operation for Excellent Line and Load Transient Response
Short-Circuit Protected
Low Quiescent Current: 135µA (LTC1701)
Low Dropout Operation: 100% Duty Cycle
Ultralow Shutdown Current: IQ < 1µA
Peak Inductor Current Independent of Inductor Value
Output Voltages from 5V Down to 1.25V

参数

应用

PDAs/Palmtop PCs
Digital Cameras
Cellular Phones
Portable Media Players
PC Cards
Handheld Equipment

典型应用图

LTC1701 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) *
LTC1701BES5	SOT	5	E	$2.36
LTC1701BES5#PBF	SOT	5	E	$2.36
LTC1701BES5#TR	SOT	5	E	$2.36	$2.00
LTC1701BES5#TRM	SOT	5	E	$2.36	$2.02
LTC1701BES5#TRMPBF	SOT	5	E	$2.36	$2.02
LTC1701BES5#TRPBF	SOT	5	E	$2.36	$2.00
LTC1701ES5	SOT	5	E	$2.36
LTC1701ES5#PBF	SOT	5	E	$2.36
LTC1701ES5#TR	SOT	5	E	$2.36	$2.00
LTC1701ES5#TRM	SOT	5	E	$2.36	$2.02
LTC1701ES5#TRMPBF	SOT	5	E	$2.36	$2.02
LTC1701ES5#TRPBF	SOT	5	E	$2.36	$2.00

LTC1701 数据手册及相关资料下载

数据手册(英文) : LTC1701/LTC1701B - 1MHz Step-Down DC/DC Converter in SOT-23.PDF
设计要点 (英文) : DN280 - Tiny and Efficient Boost Converter Generates 5V at 3A from 3.3V Bus.PDF
可靠性数据 : R419 Reliability Data .PDF