L5973AD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 L5973AD is a step down monolithic power switching regulator with a switch current limit of 2A so it is able to deliver more than 1.5 A DC current to the load depending on the application conditions.

The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an SO8 package with exposed frame, that allows to reduce the RthJA down to approximately 40 °C/W.

The device uses an internal P-Channel D-MOS transistor (with a typical of 200 mΩ) as switching element to avoid the use of bootstrap capacitor and guarantee high efficiency.

An internal oscillator fixes the switching frequency at 500 kHz to minimize the size of external components.

Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V 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

• Inhibit for zero current consumption
• Internal current limiting
• Protection against feedback disconnection
• Synchronization
• Thermal shutdown
• Voltage feedforward
• 500 kHz Internally fixed frequency
• 2 A Internal switch
• 3.3 V / (±2 %) reference voltage
• Operating input voltage from 4 V to 36 V
• Low dropout operation: 100 % duty cycle
• Zero load current operation
• Output voltage adjustable from 1.235 V to 35 V

简介

L5973AD属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的L5973AD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。