LTC1626中文资料Low Voltage, High Efficiency Step-Down DC/DC Converter数据手册ADI规格书

描述 Description

OBSOLETE: For Information Purposes Only. Contact Analog Devices for Potential Replacement.

The LTC1626 is a monolithic, low voltage, step-down current mode DC/DC converter featuring Burst Mode™ operation at low output current.

The input supply voltage range of 2.5V to 6V makes the LTC1626 ideal for single cell Li-Ion and 3- or 4-cell NiCd/NiMH applications. A built-in 0.32Ω switch (VIN = 4.5V) allows up to 0.6A of output current.

The LTC1626 incorporates automatic power saving Burst Mode operation to reduce gate charge losses when the load current drops below the level required for continuous operation. With no load, the converter draws only 165µA. In shutdown, it draws a mere 0.5µA—making it ideal for current sensitive applications.

The inductor current is user-programmable via an external current sense resistor. In dropout, the internal P-channel MOSFET switch is turned on continuously, maximizing battery life.

Applications

• Single Cell Li-Ion Step-Down Converters

• 3- or 4-Cell NiMH Step-Down Converters

• Cellular Telephones

• 5V to 3.3V Conversion

• 3.3V to 2.5V Conversion

• Inverting Converters

• Portable Instruments

特性 Features

• OBSOLETE: For Information Purposes Only. Contact Analog Devices for Potential Replacement.
• Wide Input Supply Voltage Range: 2.5V to 6V
• High Efficiency: Up to 95%
• Low RDS(ON) Internal Switch: 0.32Ω (VIN = 4.5V)
• Current Mode Operation for Excellent Line and Load Transient Response
• Short-Circuit Protected
• Low Dropout Operation: 100% Duty Cycle
• Built-In Low-Battery Detector
• Low Quiescent Current at Light Loads: IQ = 165µA
• Ultralow Shutdown Current: IQ = 0.5µA
• Peak Inductor Current Independent of Inductor Value
• Available in 14-Pin SO Package

简介

LTC1626属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的LTC1626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。