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STMicroelectronics A7986A

3 A step-down switching regulator for automotive applications

Overview

TopologyOther Topology
Switching frequency210-275 kHz
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

  • Dedicated to automotive applications
  • Automotive LED driving

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples
744777003
IGS STP ALT EAG CAD LTS PSP SPE CADWE-PD SMT Power Inductor 3.3 3.5 4.6 25 30 55 7345 Standard
744777004
IGS STP ALT EAG CAD LTS PSP SPE CADWE-PD SMT Power Inductor 4.7 3.2 4 25 40 37 7345 Standard
Order Code Data­sheet
744777003
744777004
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples