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Manufacturer Part #


NCP1117 Series 1 A 1.25-18.8 V Adj Output LDO Positive Voltage Regulator-TO-252

ECAD Model:
Mfr. Name: ON Semiconductor
Standard Pkg:
Date Code: 1926
Product Specification Section
Technical Attributes
Attributes Table
Input Voltage-Max: 20V
Output Voltage Range: 1.27V to 1.225V
Output Voltage Fixed: 1.25V/18.8V
Dropout Voltage-Max: 1.2V
Output Current-Max: 1A
Rated Power: 1.86W
Tolerance (%): ±1%
Operating Temp Range: 0°C to 125°C
Regulator Topology: Adjustable
Quiescent Current: 10mA
No. of Outputs: Single
Load Regulation (%): 0.4%
Current - Limit: 2200mA
Line Regulation (%): 0.1%
Package Style:  TO-252-3 (DPAK)
Mounting Method: Surface Mount
Features & Applications
The NCP1117 series are low dropout (LDO) positive linear voltage regulators that are capable of providing an output current that is in excess of 1.0 A with a maximum dropout voltage of 1.2 V at 800 mA over temperature.

This series contains eight fixed output voltages of 1.5 V, 1.8 V, 2.0 V, 2.5 V, 2.85 V, 3.3 V, 5.0 V, and 12 V that have no minimum load requirement to maintain regulation. Also included is an adjustable output version that can be programmed from 1.25 V to 18.8 V with two external resistors. On chip trimming adjusts the reference/output voltage to within +/- 1.0% accuracy. Internal protection features consist of output current limiting, safe operating area compensation, and thermal shutdown. The NCP1117 series can operate with up to 20 V input. Devices are available in SOT223 and DPAK packages.


  • Output Current in Excess of 1.0 A
  • 1.2 V Maximum Dropout Voltage at 800 mA Over Temperature
  • Fixed Output Voltages of 1.5 V, 1.8 V, 2.0 V, 2.5 V, 2.85 V, 3.3 V, 5.0 V, and 12 V
  • Adjustable Output Voltage Option
  • No Minimum Load Requirement for Fixed Voltage Output Devices
  • Reference/Output Voltage Trimmed to +/- 1.0%
  • Current Limit, Safe Operating and Thermal Shutdown Protection
  • Operation to 20 V Input
  • Pb-Free Packages are Available


  • Consumer and Industrial Equipment Point of Regulation
  • Active SCSI Termination for 2.85 V Version
  • Switching Power Supply Post Regulation
  • Hard Drive Controllers
  • Battery Chargers
  • Automotive
Pricing Section
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Factory Lead Time:
21 Weeks
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