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reference designA7986A

STMicroelectronics A7986A

3 A step-down switching regulator for automotive applications

Overview

TopologyBuck-Boost Converter
Input voltage4.5-38 V
Switching frequency210-275 kHz
Output 112 V
IC revision6

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.

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

Remarks:

  • Refer page num 17 more inductor values with series.

Typical applications

  • Automotive LED driving
  • Dedicated to automotive applications

More information

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Product series
L(µH)
IRP,40K(A)
ISAT(A)
RDC max.(mΩ)
fres(MHz)
Size
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744771115
SPECWE-PD SMT Power Inductor, 15 µH, 7 A

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PD SMT Power Inductor
Inductance15 µH
Performance Rated Current7 A
Saturation Current4.5 A
DC Resistance28 mΩ
Self Resonant Frequency16.6 MHz
Size1260 
VersionStandard 
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