LTC1701B中文资料1MHz Step-Down DC/DC Converter in SOT-23数据手册ADI规格书

描述 Description

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.
 

特性 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

应用 Application

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

简介

LTC1701B属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的LTC1701B稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。