A5970AD中文资料最高1 A的降压开关稳压器，用于汽车应用数据手册ST规格书

描述 Description

The A5970AD is a step-down monolithic power switching regulator with a minimum switch current limit of 1.35 A so it is able to deliver up to 1 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to VIN.

The device uses an internal P-channel DMOS transistor (with a typical RDS(on)of 250 mΩ) as switching element to minimize the size of the external components.

An internal oscillator fixes the switching frequency at 500 kHz. Having a minimum input voltage of 4 V only it fits the automotive applications requiring the device operation even in cold crank conditions. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short-circuit protection.

特性 Features

• Qualified following the AEC-Q100 requirements (see PPAP for more details)
• 1 A DC output current
• Operating input voltage from 4 V to 36 V
• 3.3 V / (± 2%) reference voltage
• Output voltage adjustable from 1.235 V to VIN
• Low dropout operation: 100% duty cycle
• 500 kHz Internally fixed frequency
• Voltage feed-forward
• Zero load current operation
• Internal current limiting
• Inhibit for zero current consumption
• Synchronization
• Protection against feedback disconnection
• Thermal shutdown

简介

A5970AD属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的A5970AD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。