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Up to 2 A step down switching regulator

Quantity $ per Unit Savings
1 - 9$3.530%
10 - 24$3.1610%
25 - 99$3.0015%
100 - 231$2.6026%
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Parameter NameParameter Value
Input Voltage Min Volt4.0
Input Voltage Max Volt36.0
Operating Temp Min Celsius-40.0
Operating Temp Max Celsius150.0
Packing TypeTape And Reel
RoHs compliantEcopack2
Package NamePowerSO-8

The L5973D is a step down monolithic power switching regulator with a minimum switch current limit of 2.5 A so it is able to deliver more than 2 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an SO8 package with exposed frame, that allows to reduce the Rth(j-amb) down to approximately 40 °C/W. The device uses an internal P-channel D-MOS transistor (with a typical Rdson of 250 mΩ) as switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 250 kHz. Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V bus, available in all computer related applications. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection.

Key features
  • 2.5 A internal switch
  • Operating input voltage from 4 V to 36 V
  • 3.3 V / (±2%) reference voltage
  • Output voltage adjustable from 1.235 V to 35 V
  • Low dropout operation: 100 % duty cycle
  • 250 kHz internally fixed frequency
  • Voltage feedforward
  • Zero load current operation
  • Internal current limiting
  • Synchronization
  • Adjustable soft-start time
  • Inhibit for zero current consumption
  • Protection against feedback disconnection
  • Thermal shutdown