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IC-Hersteller STMicroelectronics

IC-Hersteller (79)

STMicroelectronics ST1S31

3 A DC step-down switching regulator

Details

Topologie Abwärtswandler
Schaltfrequenz 1200-1900 kHz
IC-Revision 4

Beschreibung

The ST1S31 device is an internally compensated1.5 MHz fixed-frequency PWM synchronous stepdownregulator. The ST1S31 operates from 2.8 Vto 5.5 V input, while it regulates an output voltageas low as 0.8 V and up to VIN.The ST1S31 integrates a 60 m high-side switchand a 45 m synchronous rectifier allowing veryhigh efficiency with very low output voltages.The peak current mode control with internalcompensation delivers a very compact solutionwith a minimum component count.The ST1S31 device is available in 3 mm x 3 mm,8 lead VFDFPN and SO8 packages.

Eigenschaften

 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 m and 45 m power MOSFETs
  • All ceramic capacitor
  • Power Good (POR)
  • Cycle-by-cycle current limiting
  • Current foldback short-circuit protection
  • VFDFPN 3 x 3 - 8L, SO8 packages

Typische Anwendungen

  • μP/ASIC/DSP/FPGA core and I/O supplies, Optical storage, hard disk drive, printers, audio/graphic cards
  • Point of load for: STB, TVs, DVDs

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
744771001
IGS STP ALT EAG CAD LTS PSP SPE CAD WE-PD SMT-Speicherdrossel 1.5 10.5 12.5 4 6 60 1260 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
744311150
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-HCI SMT-Hochstrominduktivität 1.5 11 14 7.26 72 7040 SMT 1.12 6.6 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
744771002
IGS STP ALT EAG CAD LTS PSP SPE CAD WE-PD SMT-Speicherdrossel 2.2 10 11 5 8 50 1260 Standard
744316220
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-HCI SMT-Hochstrominduktivität 2.2 7.5 7.5 11.3 12.43 108 5040 SMT 1.5 11.3 Superflux
7443551280
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-HCI SMT-Hochstrominduktivität 2.8 20 17.5 3.74 35 1365 SMT 1.85 3.3 WE-PERM
744314330
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-HCI SMT-Hochstrominduktivität 3.3 9 8 9.9 65 7050 SMT 2.2 9 Superflux
744771003
IGS STP ALT EAG CAD LTS PSP SPE CAD WE-PD SMT-Speicherdrossel 3.5 9.25 9 5 8 40 1260 Standard
7443556350
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-HCI SMT-Hochstrominduktivität 3.5 22.5 37 3.348 38 1890 SMT 3 3.1 WE-PERM 2
744325420
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-HCI SMT-Hochstrominduktivität 4.2 11 14 7.87 33 1050 SMT 3.3 7.1 Superflux
744316470
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-HCI SMT-Hochstrominduktivität 4.7 4.6 4.7 26.95 57 5040 SMT 3.3 24.5 Superflux
744311470
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-HCI SMT-Hochstrominduktivität 4.7 6 7 21.45 33 7040 SMT 3.5 19.5 Superflux
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