3 A step-down switching regulator for automotive applications

Topologie: Buck
Eingangsspannung (min.): 4.50 V
Eingangsspannung (max.): 38.00 V
Schaltfrequenz (min.): 210.00 kHz
Schaltfrequenz (max.): 275.00 kHz
Ausgang 1: 4.50 V / 3.000 A

Erstveröffentlichung am 21.02.2013, Version 6 vom


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.


  • 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 packageRemarks:
  • Refer page num 17 more inductor values with series.


  Artikel Nr. SPEC Produktserie L
RDC typ.
RDC max.
Version Muster
74477110 PDF WE-PD SMT-Speicherdrossel 10 5 5.5 18 25 21.5 Standard

Weitere Anwendungen und Artikel von Würth Elektronik zu diesem IC

  • A7986A
    Topologie: Other, Schaltfrequenz (min.): 210.00 kHz, Schaltfrequenz (max.): 275.00 kHz