STMicroelectronics

L5985

2 A step-down switching regulator

Topologie: Buck
Eingangsspannung (min.): 3.30 V
Eingangsspannung (max.): 18.00 V
Schaltfrequenz (min.): 250.00 kHz
Schaltfrequenz (max.): 1000.00 kHz
Ausgang 1: 3.30 V / 2.000 A

Erstveröffentlichung am 21.02.2013, Version 6 vom

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.

Merkmale

  • 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 packageRemarks
  • 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

Artikel

  Artikel Nr. SPEC Produktserie L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Version Muster
7447779115 PDF WE-PD SMT-Speicherdrossel 15 1.6 2.2 70 81 19.5 Robust

Weitere Anwendungen und Artikel von Würth Elektronik zu diesem IC

  • L5985
    Topologie: Buck, Eingangsspannung (min.): 3.30 V, Eingangsspannung (max.): 18.00 V, Schaltfrequenz (min.): 250.00 kHz, Schaltfrequenz (max.): 1000.00 kHz, Ausgang 1: 3.30 V / 2.000 A
  • L5985
    Topologie: Buck, Eingangsspannung (min.): 2.90 V, Eingangsspannung (max.): 18.00 V, Schaltfrequenz (min.): 250.00 kHz, Schaltfrequenz (max.): 1000.00 kHz