STMicroelectronics A5970AD

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 DCcurrent 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 m) 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 applicationsrequiring the device operation even in cold crank conditions. Pulse by pulse current limit with the internal frequency modulation offers an effectiveconstant current short-circuit protection.

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

Typical applications

• Dedicated to automotive applications

More information

• Datasheet
• IC product information