en

Cart

Your cart is empty.

IC reference design search

STMicroelectronics L5981

1 A step-down switching regulator

Overview

TopologyBuck Converter
Input voltage3.3-18 V
Switching frequency250-1000 kHz
Output 13.3 V
IC revision7

Description

The L5981 is a step-down switching regulator with a 1.5 A (min.) current limited embedded Power MOSFET, so it is able to deliver in excess of 1 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 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.

Features

  • 1 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:-Refer page no 16Table 7. Inductors

Typical applications

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

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples
7447779115SPEC
7 files WE-PD SMT Power Inductor 15 1.6 2.2 70 81 19.5 7345 Robust
Order Code Data­sheet
7447779115SPEC
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples