STMicroelectronics

L5987

3 A step-down switching regulator

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

Erstveröffentlichung am 20.02.2013, Version 4 vom

Beschreibung

The L5987 is a step-down switching regulator with a 3.5 A (minimum) current limited embedded Power MOSFET, so it is able to deliver an up to 3 A current to the load depending on the application conditions.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 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 externally adjusted up to 1 MHz.The VFQFPN8 and the HSOP packages with an exposed pad allow reducing the RthJAdown to 60 °C/W and 40 °C/W respectively.

Merkmale

  • 3 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
  • VFQFPN 3 x 3
  • 8L and HSOP8 package

Artikel

  Artikel Nr. SPEC Produktserie L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Version Muster
7447714047 PDF WE-PD SMT-Speicherdrossel 4.7 7 8 10.4 12.4 34 Performance
7447714033 PDF WE-PD SMT-Speicherdrossel 3.3 7.5 9 8.9 10.5 42 Performance
7447714022 PDF WE-PD SMT-Speicherdrossel 2.2 8.6 9.5 6.8 8 53 Performance
7447713082 PDF WE-PD SMT-Speicherdrossel 8.2 3 4.7 41 49 30 Performance
7447713100 PDF WE-PD SMT-Speicherdrossel 10 2.6 4.1 52 62 25 Performance
7447713150 PDF WE-PD SMT-Speicherdrossel 15 2.2 3.4 74 89 19.5 Performance