L5972D中文资料最高1.5 A步降开关稳压器数据手册ST规格书

描述 Description

The L5972D is a step down monolithic power switching regulator with a minimum switch current limit of 2A so it is able to deliver more than 1.5A DC current to the load depending on the application conditions.

The output voltage can be set from 1.235V to 35V.

The device uses an internal P-Channel D-MOS transistor (with a typical Rdson of 250mΩ) as switching element to minimize the size of the external components.

An internal oscillator fixes the switching frequency at 250kHz.

Having a minimum input voltage of 4.4V only, it is particularly suitable for 5V bus, available in all computer related applications.

Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection.

特性 Features

• Thermal shutdown
• Protection against feedback disconnection
• Zero load current operation
• Voltage feedforward
• 2A internal switch
• Output voltage adjustable from 1.235V to 35V
• Operating input voltage from 4.4V to 36V
• 250kHz Internally fixed frequency
• Internal current limiting
• Low dropout operation: 100% duty cycle

简介

L5972D属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的L5972D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。