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IC-Hersteller STMicroelectronics

IC-Hersteller (79)

STMicroelectronics AST1S31

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

Details

Topologie Abwärtswandler
Eingangsspannung 2.8-4 V
Schaltfrequenz 1200-1900 kHz
Ausgang 1 3.3 V / 3 A
IC-Revision 5

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.

Eigenschaften

  • 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

Typische Anwendungen

  • Designed for automotive systems / Car body applications
  • Battery powered applications

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Downloads Produktserie L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Bauform Version LR
(µH)
RDC
(mΩ)
Material Muster
744770015
IGS STP ALT EAG CAD LTS PSP SPE CAD WE-PD SMT-Speicherdrossel 1.5 10 12 5 6 42 1280 Standard
744310150
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-HCI SMT-Hochstrominduktivität 1.5 7.5 12 13.97 80 7030 SMT 1.25 12.7 Superflux
744310200
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-HCI SMT-Hochstrominduktivität 2 6.5 9 15.62 58 7030 SMT 1.55 14.2 Superflux
74477002
IGS STP ALT EAG CAD LTS PSP SPE CAD WE-PD SMT-Speicherdrossel 2.4 10.1 14.3 9 12 41 1280 Standard
74477003
IGS STP ALT EAG CAD LTS PSP SPE CAD WE-PD SMT-Speicherdrossel 3.5 8.9 9.6 11 14 37.5 1280 Standard
Artikel Nr. Daten­blatt
744770015
744310150
744310200
74477002
74477003
Muster
Artikel Nr. Daten­blatt Downloads Produktserie L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Bauform Version LR
(µH)
RDC
(mΩ)
Material Muster