A7986ATR datasheet(1/42 Pages) STMICROELECTRONICS

Part #	A7986ATR

Description	3 A step-down switching regulator for automotive applications

PDF	42 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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This is information on a product in full production.

August 2013

DocID022801 Rev 5

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A7986A

3 A step-down switching regulator for automotive applications

Datasheet

- production data

Features

• Qualified following AEC-Q100 requirements

• 3 A DC output current

• 4.5 V to 38 V input voltage

• Output voltage adjustable from 0.6 V

• 250 kHz switching frequency, programmable

up to 1 MHz

• Internal soft-start and enable

• Low dropout operation: 100% duty cycle

• Voltage feed-forward

• Zero load current operation

• Overcurrent and thermal protection

• HSOP8 package

Applications

• Dedicated to automotive applications

• Automotive LED driving

Description

The A7986A is a step-down switching regulator

with a 3.7 A (min.) current limited embedded

power MOSFET, so it is able to deliver up to 3 A

current to the load depending on the application

conditions.

The input voltage can range from 4.5 V to 38 V,

while the output voltage can be set starting from

0.6 V to VIN.

Requiring a minimum set of external components,

the device includes an internal 250 kHz switching

frequency oscillator that can be externally

adjusted up to 1 MHz.

The HSOP8 package with exposed pad allows

the reduction of Rth(JA) down to 40 °C/W.

Figure 1. Application circuit

HSOP8 exposed pad

www.st.com

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