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IC-Hersteller STMicroelectronics

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STMicroelectronics L5980

0.7 A step-down switching regulator

Details

Topologie Abwärtswandler
Eingangsspannung 2.9-18 V
Schaltfrequenz 250-1000 kHz
IC-Revision 7

Beschreibung

The L5980 is a step-down switching regulator with a 1 A (min.) current limited embedded Power MOSFET, so it is able to deliver in excess of 0.7 ADC 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 of2.9 V, the device is suitable also 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

  • 0.7 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 x 3 mm package

Remarks

  • Suggested inductor values ranges is also given in table 7. from page number 16.
  • 45uH inductor value is added from design example, refer page number 16.
  • Output current to be taken from general value. i.e 0.7A
  • Some of the Product and series to be added nearest inductor values rangesREMARKS:-TABLE 7

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 L1
(µH)
IR 1
(A)
ISAT 1
(A)
RDC1 typ
(Ω)
RDC1 max.
(Ω)
fres 1
(MHz)
Muster
74454133
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-PD3 SMT-Speicherdrossel 33 1.2 1.8 0.127 0.16 12
74454147
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-PD3 SMT-Speicherdrossel 47 1 1.4 0.158 0.19 10
74454168
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-PD3 SMT-Speicherdrossel 68 0.82 1.35 0.285 0.34 8
Artikel Nr. Daten­blatt
74454133
74454147
74454168
Muster
Artikel Nr. Daten­blatt Downloads Produktserie L1
(µH)
IR 1
(A)
ISAT 1
(A)
RDC1 typ
(Ω)
RDC1 max.
(Ω)
fres 1
(MHz)
Muster