3 A step-down switching regulator

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 1 vom


The R7986A 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 large ambient temperature range makes it ideal for aerospace and defense applications.The HSOP8 package with exposed pad allows the reduction of Rth(JA)down to 40 °C/W.


  • General features
  • 3 A DC output current
  • 4.5 V to 38 V input voltage
  • Large ambient temperature range:
  • 40 °C to 125 °C
  • 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
  • Aerospace and defense features
  • Suitable for use in aerospace and defense applications
  • Dedicated traceability and part marking
  • Production parts approval documents available
  • Adapted extended life time and obsolescence management
  • Extended product change notification process
  • Designed and manufactured to meet sub-ppm quality goals
  • Advanced mold and frame designs for superior resilience in harsh environments (acceleration, EMI, thermal, humidity)
  • Extended screening capability on requestRemarks:List of inductorsRefer page no.17


  Artikel Nr. SPEC Produktserie L
RDC typ.
RDC max.
Version Muster
7447713082 PDF WE-PD SMT-Speicherdrossel 8.2 3 4.7 41 49 30 Performance