STMicroelectronics

AST1S31

Up to 4 V, 3 A step-down 1.5 MHz switching regulator for automotive applications

Topologie: Buck
Eingangsspannung (min.): 2.80 V
Eingangsspannung (max.): 4.00 V
Schaltfrequenz (min.): 1200.00 kHz
Schaltfrequenz (max.): 1900.00 kHz
Ausgang 1: 3.30 V / 3.000 A

Erstveröffentlichung am 10.03.2016, Version 5 vom

Beschreibung

The AST1S31 device is an internally compensated 1.5 MHz fixed-frequency PWM synchronous step-down regulator. The AST1S31 device operates from 2.8 V to 4 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.The AST1S31 integrates a 70 mΩ high-side switch and a 55 mΩ synchronous rectifier allowing very high efficiency with very low output voltages.The peak current mode control with an internal compensation deliver a very compact solution with a minimum component count.The AST1S31 device is available in a 3 x 3 mm, 8 leads VFDFPN package.

Merkmale

  • AECQ100 qualification
  • 3 A DC output current
  • 2.8 V to 4 V input voltage
  • Output voltage adjustable from 0.8 V
  • 1.5 MHz switching frequency
  • Internal soft-start and enable
  • Integrated 70 mΩ and 55 mΩ power MOSFETs
  • All ceramic capacitor
  • Power Good (POR)
  • Cycle-by-cycle current limiting
  • Current foldback short-circuit protection
  • VFDFPN 3 x 3
  • 8L package

Artikel

  Artikel Nr. SPEC Produktserie RDC
(mΩ)
L
(µH)
Material IR
(A)
LR
(µH)
ISAT
(A)
fres
(MHz)
Version RDC typ.
(mΩ)
RDC max.
(mΩ)
Muster
744310150 PDF WE-HCI SMT-Hochstrominduktivität 12.7 1.5 Superflux 7.5 1.25 12 80 SMT
744310200 PDF WE-HCI SMT-Hochstrominduktivität 14.2 2 Superflux 6.5 1.55 9 58 SMT
74477002 PDF WE-PD SMT-Speicherdrossel 2.4 10.1 14.3 41 Standard 9 12
74477003 PDF
744770015 PDF