L5981:Up to 1 A step down switching regulator

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 externally adjusted up to 1 MHz.

The VFQFPN8 package with an exposed pad allows reducing the RthJA down to approximately 60 °C/W.

Key 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 package
产品规格
DescriptionVersionSize
DS5036: 1 A step-down switching regulator7.0795 KB
Design Notes & Tips
DescriptionVersionSize
DN0011: ST1S03 alternative topology: Using a buck in a negative buck-boost configuration1.1359 KB
手册
DescriptionVersionSize
Brochure Power management guide05.20167 MB
解决方案评估工具
型号制造商Description
EVAL5981L5981, 1 A step-down switching regulator, evaluation board
样片和购买
型号PackagePacking TypeUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
L5981TRVDFPN 8 3x3x1.0Tape And Reel0.9181000NECEAR99PHILIPPINES
质量和可靠性
型号PackageGradeRoHS Compliance GradeMaterial Declaration**
L5981TRVDFPN 8 3x3x1.0IndustrialEcopack2
1 A step-down switching regulator L5981
circuit_diagram_13004_thumbnail.png L5981
ST1S03 alternative topology: Using a buck in a negative buck-boost configuration L5986
Very low drop voltage regulators with inhibit KFXX