0.7 A step-down switching regulator

Topologie: Buck
Eingangsspannung (min.): 3.30 V
Eingangsspannung (max.): 18.00 V
Schaltfrequenz (min.): 250.00 kHz
Schaltfrequenz (max.): 1000.00 kHz
Ausgang 1: 3.30 V / 0.700 A

Erstveröffentlichung am 21.02.2013, Version 7 vom


The L5980 is a step-down switching regulator with a 1 A (min.) current limited embedded Power MOSFET, so it is able to deliver in excess of 0.7 ADC current to the load depending on the application condition.The input voltage can range from 2.9 V to 18 V, while the output voltage can be set starting from 0.6 V to VIN. Having a minimum input voltage of2.9 V, the device is suitable also for a 3.3 V bus.Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externallyadjusted up to 1 MHz.The VFQFPN8 package with an exposed pad allows reducing the RthJA down to approximately 60 °C/W.


  • 0.7 A DC output current
  • 2.9 V to 18 V input voltage
  • Output voltage adjustable from 0.6 V
  • 250 kHz switching frequency, programmable up to 1 MHz
  • Internal soft-start and inhibit
  • Low dropout operation: 100% duty cycle
  • Voltage feedforward
  • Zero load current operation
  • Overcurrent and thermal protection
  • VFQFPN8 3 x 3 mm packageRemarks
  • Suggested inductor values ranges is also given in table 7. from page number 16.
  • 45uH inductor value is added from design example, refer page number 16.
  • Output current to be taken from general value. i.e 0.7A
  • Some of the Product and series to be added nearest inductor values rangesREMARKS:-TABLE 7


  Artikel Nr. SPEC Produktserie L
RDC typ.
RDC max.
Version Muster
7447779115 PDF WE-PD SMT-Speicherdrossel 15 1.6 2.2 70 81 19.5 Robust

Weitere Anwendungen und Artikel von Würth Elektronik zu diesem IC

  • L5980
    Topologie: Buck, Eingangsspannung (min.): 2.90 V, Eingangsspannung (max.): 18.00 V, Schaltfrequenz (min.): 250.00 kHz, Schaltfrequenz (max.): 1000.00 kHz