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1 A step down switching regulator

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Parameter NameParameter Value
Input Voltage Min Volt8.0
Input Voltage Max Volt55.0
Operating Temp Min Celsius-40.0
Operating Temp Max Celsius150.0
Packing TypeTape And Reel
RoHs compliantEcopack1
Package NameSO-16W

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