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IC-Hersteller STMicroelectronics

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STMicroelectronics L5985

2 A step-down switching regulator

Details

Topologie Abwärtswandler
Eingangsspannung 2.9-18 V
Schaltfrequenz 250-1000 kHz
IC-Revision 6

Beschreibung

The L5985 is a step-down switching regulator with a 2.5 A (min.) current limited embedded Power MOSFET, so it is able to deliver up to 2 A DC current to the load depending on the application condition.

The input voltage can range from 2.9 V to 18 V, while the output voltage can be set starting from 0.6 V to VIN. Having a minimum input voltage of 2.9 V, the device is suitable for a 3.3 V bus.

Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externallyadjusted up to 1 MHz.The VFQFPN8 package with an exposed pad allows reducing the RthJA down to approximately 60 °C/W.

Eigenschaften

  • 2 A DC output current
  • 2.9 V to 18 V input voltage
  • Output voltage adjustable from 0.6 V
  • 250 kHz switching frequency, programmable up to 1 MHz
  • Internal soft-start and inhibit
  • Low dropout operation: 100% duty cycle
  • Voltage feedforward
  • Zero load current operation
  • Overcurrent and thermal protection
  • VFQFPN8 3 mm x 3 mm package

Remarks

  • Inductor value 15uH is added from design example, refer page number 21.
  • Suggested inductor value ranges is also given in table in 7.
  • Another 15uH inductor inductor is added from A VERY COMPACT NEW MONOLITHIC STEP-DOWN REGULATOR MANAGES HIGH CURRENT CONVERSIONS
  • Output current to be taken from general value. i.e 2A
  • Some of the Product and series to be added nearest inductor values rangesREMARKS:-TABLE 7 INDUCTOR

Typische Anwendungen

  • LED driving
  • Networking: XDSL, modems, DC-DC modules
  • Consumer: STB, DVD, DVD recorder, car
  • Industrial: chargers, PLD, PLA, FPGA
  • Computer: optical storage, hard disk drive,

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Downloads Produktserie L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Bauform Version Muster
7447779003
IGS STP ALT EAG CAD LTS PSP SPE CAD WE-PD SMT-Speicherdrossel 3.3 3.3 4.5 26 30 55 7345 Robust
7447779004
IGS STP ALT EAG CAD LTS PSP SPE CAD WE-PD SMT-Speicherdrossel 4.7 3.16 4.4 28 32 37 7345 Robust
Artikel Nr. Daten­blatt
7447779003
7447779004
Muster
Artikel Nr. Daten­blatt Downloads Produktserie L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Bauform Version Muster