IC-Hersteller STMicroelectronics

IC-Hersteller (95)

STMicroelectronics L7980

2 A step-down switching regulator

Details

TopologieAbwärtswandler
Eingangsspannung4.5-28 V
Schaltfrequenz250-1000 kHz
IC-Revision6

Beschreibung

The L7980 device is a step-down switching regulator with a 2.5 A (minimum) current limited embedded Power MOSFET, so it is able to deliver up to 2 A current to the load depending on the application conditions.

The input voltage can range from 4.5 V to 28 V, while the output voltage can be set starting from 0.6 V to VIN.

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 QFN and the HSOP packages with exposed pad allow reducing the RthJA down to 60 °C/W and 40 °C/W respectively.

Eigenschaften

  • 2 A DC output current
  • 4.5 V to 28 V input voltage
  • Output voltage adjustable from 0.6 V
  • 250 kHz switching frequency, programmable up to 1 MHz
  • Internal soft-start and enable
  • Low dropout operation: 100% duty cycle
  • Voltage feed-forward
  • Zero load current operation
  • Overcurrent and thermal protection
  • VFQFPN 3 x 3 - 8L and HSOP8 package

Remarks

  • 27uH inductor value is added from design example, refer page number 22
  • Suggested inductor values ranges also given table 7 from page number 17
  • 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.inductors

Typische Anwendungen

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

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieL
(mm)
f
(mm)
L
(µH)
IRP,40K
(A)
ISAT
(A)
RDC max.
(mΩ)
fres
(MHz)
BauformVersionIR
(A)
Montageart Muster
7447779002SPEC
8 Dateien WE-PD SMT-Speicherdrossel 7.3 2.2 6.2 20 60 7345 Robust 4.2 SMT
7447779003SPEC
8 Dateien WE-PD SMT-Speicherdrossel 7.3 3.3 4.75 30 55 7345 Robust 3.3 SMT
7447779004SPEC
8 Dateien WE-PD SMT-Speicherdrossel 7.3 4.7 4.6 32 37 7345 Robust 3.16 SMT
744771008SPEC
8 Dateien WE-PD SMT-Speicherdrossel 12 8.2 8.5 6.2 20 25 1260 Standard 6.2 SMT
74477110SPEC
8 Dateien WE-PD SMT-Speicherdrossel 12 10 7.7 5.5 24 21.5 1260 Standard 5 SMT
744771112SPEC
8 Dateien WE-PD SMT-Speicherdrossel 12 12 7.4 4.9 26 19.7 1260 Standard 4.5 SMT
744771115SPEC
8 Dateien WE-PD SMT-Speicherdrossel 12 15 7 4.5 28 16.6 1260 Standard 4.2 SMT
74458122SPEC
8 Dateien WE-PD4 SMT-Speicherdrossel 18.54 22 7 47 13 X 3.5 SMT
74458133SPEC
8 Dateien WE-PD4 SMT-Speicherdrossel 18.54 33 5.5 66 10 X 3 SMT
74458147SPEC
8 Dateien WE-PD4 SMT-Speicherdrossel 18.54 47 4.5 86 8.4 X 2.6 SMT
701518000SPEC
3 Dateien WA-SNSN Snap-In Keyslot Snap Locking on both ends 31.7 3.2
Muster
Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieL
(mm)
f
(mm)
L
(µH)
IRP,40K
(A)
ISAT
(A)
RDC max.
(mΩ)
fres
(MHz)
BauformVersionIR
(A)
Montageart Muster