STMicroelectronics

ST1S31

3 A DC step-down switching regulator

Topologie: Buck
Eingangsspannung (min.): 2.80 V
Eingangsspannung (max.): 5.50 V
Schaltfrequenz (min.): 1200.00 kHz
Schaltfrequenz (max.): 1900.00 kHz
Ausgang 1: 2.80 V / 3.000 A

Erstveröffentlichung am 20.02.2013, Version 3 vom

Beschreibung

The ST1S31 device is an internally compensated 1.5 MHz fixed-frequency PWM synchronous step-down regulator. The ST1S31 operates from 2.8 V to 5.5 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.The ST1S31 integrates a 60 mΩ high-side switch and a 45 mΩ synchronous rectifier allowing very high efficiency with very low output voltages.The peak current mode control with internal compensation delivers a very compact solution with a minimum component count.The ST1S31 device is available in 3 mm x 3 mm, 8 lead VFDFPN and SO8 packages.

Merkmale

  • 3 A DC output current
  • 2.8 V to 5.5 V input voltage
  • Output voltage adjustable from 0.8 V
  • 1.5 MHz switching frequency
  • Internal soft-start and enable
  • Integrated 60 mΩ and 45 mΩ power MOSFETs
  • All ceramic capacitor
  • Power Good (POR)
  • Cycle-by-cycle current limiting
  • Current foldback short-circuit protection
  • VFDFPN 3 x 3
  • 8L, SO8 packagesRemarks:
  • Refer page num 17 for inductor series.
  • Refer Page num 19 for inductor series.

Artikel

  Artikel Nr. SPEC Produktserie RDC
(mΩ)
L
(µH)
Material IR
(A)
LR
(µH)
ISAT
(A)
fres
(MHz)
Version Muster
744310200 PDF WE-HCI SMT-Hochstrominduktivität 14.2 2 Superflux 6.5 1.55 9 58 SMT