STMicroelectronics A5974AD Step-Down Switching Regulator Datasheet

The A5974AD is a step-down switching regulator designed for automotive applications. It can deliver up to 2A DC current to the load with an input voltage range of 4V to 36V. The output voltage can be adjusted from 1.235V to 35V. It utilizes an internal P-channel DMOS transistor as the switching element, and has a minimum input voltage of 4V, making it suitable for automotive applications even in cold crank conditions.


STMicroelectronics A5974AD Step-Down Switching Regulator Datasheet - cover page
Brand
STMicroelectronics
Category
Other Electronics
Document type
Datasheet
Language
English
Pages
49
File format
PDF
File size
1.7 MB
Published
10 August, 2012
Updated
29 September, 2023
MD5 checksum
6FB22586D28147B07F25BC3D1FCFADDE

About this manual

The A5974AD is a step-down monolithic power switching regulator designed specifically for automotive applications. It features a minimum switch current limit of 2.5 A, allowing it to deliver up to 2 A of DC output current. The device operates with an input voltage range from 4 V to 36 V and includes a 3.3 V reference voltage.

What's inside

  • Pin description
  • Maximum ratings
  • Electrical characteristics
  • Functional description
  • Error amplifier
  • Current protection
  • Thermal shutdown
  • Application information
  • Component selection
  • Package mechanical data

Specifications

Output current2 A
Input voltage range4 V to 36 V
Reference voltage3.3 V
Output voltage range1.235 V to 35 V
Switching frequency500 kHz
Operating junction temperature-40 to 150 °C

Frequently asked questions

What is the minimum input voltage for the A5974AD?

The device fits automotive applications requiring operation even in cold crank conditions with a minimum input voltage of only 4 V.

Is the A5974AD qualified for automotive use?

Yes, the device is qualified following the AEC-Q100 requirements.

What is the switching frequency of the regulator?

The device uses an internal oscillator that fixes the switching frequency at 500 kHz.

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