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STMicroelectronics L5983

1.5 A step-down switching regulator

Overview

TopologyLLC Resonant Converter
Input voltage3.3-18 V
Output 13.3 V
IC revision8

Description

The L5983 is a step-down switching regulator with a 2.0 A (min.) current limited embedded Power MOSFET, so it is able to deliver an output current in excess of 1.5 A DC to the load.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 VFQFPN package with an exposed pad allows reducing the RthJA down to approximately 60 °C/W.

Features

  • 1.5 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 packageREMARKS:-REFERPage no.16Table 7.Inductors

Typical applications

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

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples
7447779006SPEC
7 files WE-PD SMT Power Inductor 6.8 2.91 3.3 33 35 32 7345 Robust
Order Code Data­sheet
7447779006SPEC
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples