STMicroelectronics

ST1S31

3 A DC step-down switching regulator

Topologie: Buck
Schaltfrequenz (min.): 1200.00 kHz
Schaltfrequenz (max.): 1900.00 kHz

Erstveröffentlichung am 03.03.2016, Version 4 vom

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.

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 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

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
744310200 PDF WE-HCI SMT-Hochstrominduktivität 14.2 2 Superflux 6.5 1.55 9 58 SMT
744310150 PDF WE-HCI SMT-Hochstrominduktivität 12.7 1.5 Superflux 7.5 1.25 12 80 SMT
744311470 PDF WE-HCI SMT-Hochstrominduktivität 19.5 4.7 Superflux 6 3.5 7 33 SMT
744311150 PDF WE-HCI SMT-Hochstrominduktivität 6.6 1.5 Superflux 11 1.12 14 72 SMT
744314330 PDF WE-HCI SMT-Hochstrominduktivität 9 3.3 Superflux 9 2.2 8 65 SMT
744316220 PDF WE-HCI SMT-Hochstrominduktivität 11.3 2.2 Superflux 7.5 1.5 7.5 108 SMT
744316470 PDF WE-HCI SMT-Hochstrominduktivität 24.5 4.7 Superflux 4.6 3.3 4.7 57 SMT
744325420 PDF WE-HCI SMT-Hochstrominduktivität 7.1 4.2 Superflux 11 3.3 14 33 SMT
7443551280 PDF WE-HCI SMT-Hochstrominduktivität 3.3 2.8 WE-PERM 20 1.85 17.5 35 SMT
7443556350 PDF WE-HCI SMT-Hochstrominduktivität 3.1 3.5 WE-PERM 2 22.5 3 37 38 SMT
744771001 PDF WE-PD SMT-Speicherdrossel 1.5 10.5 12.5 60 Standard 4 6
744771002 PDF WE-PD SMT-Speicherdrossel 2.2 10 11 50 Standard 5 8
744771003 PDF WE-PD SMT-Speicherdrossel 3.5 9.25 9 40 Standard 5 8