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STMicroelectronics AST1S31

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

Details

TopologieAbwärtswandler
Eingangsspannung2.8-4 V
Schaltfrequenz1200-1900 kHz
Ausgang 13.3 V / 3 A
IC-Revision5

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 ProduktserieL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
BauformVersionLR
(µH)
RDC
(mΩ)
Material Muster
744770015
IGS STP ALT EAG CAD LTS PSP SPE CADWE-PD SMT-Speicherdrossel 1.5 10 12 5 6 42 1280 Standard
744310150
STE ALT EAG CAD LTS PSP SPE IGS CADWE-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 CADWE-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 CADWE-PD SMT-Speicherdrossel 2.4 10.1 14.3 9 12 41 1280 Standard
74477003
IGS STP ALT EAG CAD LTS PSP SPE CADWE-PD SMT-Speicherdrossel 3.5 8.9 9.6 11 14 37.5 1280 Standard
Muster
Artikel Nr. Daten­blatt Downloads ProduktserieL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
BauformVersionLR
(µH)
RDC
(mΩ)
Material Muster