描述 Description

The A5970D 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 250 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
? 250 kHz internally fixed frequency
? Voltage feedforward
? Zero load current operation
? Internal current limiting
? Inhibit for zero current consumption
? Synchronization
? Protection against feedback disconnection
? Thermal shutdown

簡介

A5970D屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器。由制造生產(chǎn)的A5970D穩(wěn)壓器 - DC-DC 開關(guān)穩(wěn)壓器DC-DC 開關(guān)穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級設(shè)備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應(yīng)用。這些器件與稱為“控制器”PMIC 的類似產(chǎn)品的區(qū)別在于集成了主開關(guān)元件，設(shè)備提供的電力會通過該元件。