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Manufacturer Part #


ST1S10 Series 18 V 1.1 MHz Surface Mount Buck Switching Regulator - DFN-8

Mfr. Name: STMicroelectronics
Standard Pkg:
Product Variant Information section
Date Code: 1829
Product Specification Section
Technical Attributes
Attributes Table
Topology: Buck
Input Voltage: 18V
Output Current-Max: 3A
Output Type: Adjustable
Switching Frequency-Max: 1.1MHz
Operating Temp Range: -40°C to +125°C
Duty Cycle-Max: 90%
Efficiency: 90%
No. of Outputs: 1
Quiescent Current: 2.5mA
Storage Temperature Range: -40°C to +150°C
Load Regulation (%): 0.5%
Package Style:  DFN-8
Mounting Method: Surface Mount
Features and Applications

The ST1S10PUR is a high efficiency step-down PWM current mode switching regulator capable of providing up to 3 A of output current.

This device provides excellent transient response, and is fully protected against thermal overheating, switching over-current and output short circuit.


  • Step-down current mode PWM regulator
  • Output voltage adjustable from 0.8 V
  • Input voltage from 2.5 V up to 18 V
  • 2 % DC output voltage tolerance
  • Synchronous rectification
  • Inhibit function
  • Synchronizable switching frequency from 400 kHz up to 1.2 MHz
  • Internal soft start
  • Dynamic short circuit protection
  • Typical efficiency 90 %
  • 3 A output current capability
  • Stand-by supply current max 6 μA over temperature range


  • Consumer
    • STB, DVD and DVD recorders
    • TV, VCR, car audio and LCD monitors
  • Networking
    • XDSL, modems and DC-DC modules
  • Computer
    • Optical storage and HD drivers
    • Printers and audio/graphic cards
  • Industrial and security
    • Battery chargers and DC-DC converters
    • PLD, PLA, FPGA and LED drivers

View the Available ST1S series of switching regulators

Pricing Section
Minimum Order:
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Factory Stock:Factory Stock:
Factory Lead Time:
20 Weeks
Web Price
Product Variant Information section