L4976:1 A step down switching regulator

The L4976 is a step down monolithic power switching regulator delivering 1A at a voltage between 3.3V and 50V (selected by a simple external divider). Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rds(ON) of 0.25W) to obtain very high efficency and high switching speed. A switching frequency up to 300KHz is achievable (the maximum power dissipation of the packages must be observed). A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 40V cover the majority of today’s applications. Features of this new generations of DC-DC converter include pulse-by-pulse current limit, hiccup mode for short circuit protection, voltage feedforward regulation, protection against feedback loop disconnection and thermal shutdown. The device is available in plastic dual in line, DIP8 for standard assembly, and SO16W for SMD assembly.

Key Features

  • Protection against feedback disconnection
  • and hiccup mode)
  • Thermal shutdown
  • Zero load current operation
  • Voltage feedforward
  • Up to 1A step down converter
  • Precise 5.1V reference voltage
  • Operating input voltage from 8v to 55v
  • Switching frequency adjustable up to 300kHz
  • Internal current limiting (pulse-bypulse
  • Output voltage adjustable from 0.5V to 50V
产品规格
DescriptionVersionSize
DS1411: 1A step down switching regulator7.2253 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
样片和购买
型号PackagePacking TypeUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
L4976DIP-8Tube1.7291000NECEAR99MALAYSIA
L4976DSO-16WTube1.7881000NECEAR99MALAYSIA
L4976D013TRSO-16WTape And Reel1.7881000NECEAR99MALAYSIA
质量和可靠性
型号PackageGradeRoHS Compliance GradeMaterial Declaration**
L4976DIP-8IndustrialEcopack2 (**)
L4976DSO-16WIndustrialEcopack1
L4976D013TRSO-16WIndustrialEcopack1
1A step down switching regulator L4976
circuit_diagram_6006_thumbnail.png L4976
ST1S03 alternative topology: Using a buck in a negative buck-boost configuration L5986
Very low drop voltage regulators with inhibit KFXX