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Manufacturer Part #


L5970D Series 1 A Step Down Monolithic Power Switching Regulator - SOIC-8

ECAD Model:
Mfr. Name: STMicroelectronics
Standard Pkg:
Product Variant Information section
Date Code: 1916
Product Specification Section
Technical Attributes
Attributes Table
Topology: Buck
Input Voltage: 4.4V to 36V
Output Current-Max: 1A
Output Voltage Range: 1.2V to 35V
Output Type: Adjustable
Switching Frequency-Max: 250kHz
Operating Temp Range: -40°C to +150°C
Duty Cycle-Max: 100%
Efficiency: 90%
No. of Outputs: 1
Quiescent Current: 2.5mA
Storage Temperature Range: -55°C to +150°C
Load Regulation: 15mV
Package Style:  SOIC-8
Mounting Method: Surface Mount
Features & Applications
The L5970D013TR is a step down monolithic power switching regulator capable to deliver up to 1 A at output voltages from 1.2 V to 35 V. 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 4.4 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.


  • Up to 1 A output current
  • Operating input voltage from 4.4 V to 36 V
  • 3.3 V / (±2%) reference voltage
  • Output voltage adjustable from 1.2 V to 35 V
  • Low dropout operation: 100% duty cycle
  • 250 kHz Internally fixed frequency
  • Voltage feedforward
  • Zero load current operation
  • Internal current limiting
  • Inhibit for zero current consumption
  • Synchronization
  • Protection against feedback disconnection
  • Thermal shutdown


  • Consumer: STB, DVD, TV, VCR, car radio, LCD monitors
  • Networking: XDSL, modems, DC-DC modules
  • Computer: printers, audio/graphic cards, optical storage, hard disk drive
  • Industrial: changers, car battery, DC-DC converters
Pricing Section
Global Stock:
Factory Stock:Factory Stock:
Factory Lead Time:
30 Weeks
Minimum Order:
Multiple Of:
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Web Price
Product Variant Information section