SNVS773D April   2000  – September 2015 LM117HV , LM317HV


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Load Regulation
      2. 8.3.2 Current Limit
    4. 8.4 Device Functional Modes
      1. 8.4.1 External Capacitors
      2. 8.4.2 Protection Diodes
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1  1.25-V to 45-V High Voltage Adjustable Regulator
        1. Design Requirements
        2. Detailed Design Procedure
        3. Application Curve
      2. 9.2.2  Digitally Selected Outputs
      3. 9.2.3  Logic Regulator (5-V) With Electronic Shutdown
      4. 9.2.4  Slow Turnon 15-V Regulator
      5. 9.2.5  Adjustable Regulator With Improved Ripple Rejection
      6. 9.2.6  High Stability 10-V Regulator
      7. 9.2.7  High Current Adjustable Regulator
      8. 9.2.8  Emitter Follower Current Amplifier
      9. 9.2.9  1-A Current Regulator
      10. 9.2.10 Common Emitter Amplifier
      11. 9.2.11 Low-Cost, 3-A Switching Regulator
      12. 9.2.12 Adjustable Multiple On-Card Regulators With Single Control
      13. 9.2.13 AC Voltage Regulator
      14. 9.2.14 12-V Battery Charger
      15. 9.2.15 Adjustable 4-A Regulator
      16. 9.2.16 Current Limited 6-V Charger
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Related Links
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Up to 60 V Input to Output Differential
  • 1.5-A Output Current
  • Line Regulation 0.01%/V (Typical)
  • Load Regulation 0.1% (Typical)
  • 80-dB Ripple Rejection (Typical)
  • Internal Short-Circuit Current Limiting Protection
  • Thermal Overload Protection
  • –55 to 150°C Operating Temperature Range (LM117HV)
  • 0 to 125°C Operating Temperature Range (LM317HV)

2 Applications

  • Industrial Power Supplies
  • PLC Systems
  • Factory Automation Systems
  • Building Automation Systems
  • Battery Charger

1.2-V to 50-V Adjustable Regulator With High Voltage Input

LM117HV LM317HV 00906201.png
*Needed if device is more than 6 inches from filter capacitors. .
†Optional—improves transient response
†† LM117HV LM317HV eq1_VOUT_SNVS773.gif

3 Description

The LMx17HV is an adjustable 3-terminal positive voltage regulator capable of supplying 1.5 A or more currents over a 1.25-V to 57-V output voltage range. It requires only two external resistors to set the output voltage. The LMx17HV is packaged in standard transistor packages that are easily mounted and handled.

The LMx17HV offers overload protection like current limit, thermal overload protection and safe area protection, which make the device blowout proof. The overload protection circuitry remains fully functional even if the adjustment terminal is disconnected.

Typically, no capacitors are needed unless the device is situated more than 6 inches from the input filter capacitors, in which case an input bypass is needed. An optional output capacitor can be added to improve transient response. The adjustment terminal can be bypassed to achieve very high ripple rejection ratios which are difficult to achieve with standard 3-terminal regulators.

Since the regulator is floating and sees only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input to output differential is not exceeded, or in other words, do not short the output to ground.

By connecting a fixed resistor between the adjustment and output, the LMx17HV can also be used as a precision current regulator. Supplies with electronic shutdown can be achieved by clamping the adjustment terminal to ground, which programs the output to 1.25 V where most loads draw little current.

Device Information(1)

TO-39 (3) 8.255 mm × 8.255 mm
TO-3 (2) 19.507 mm × 19.507 mm
LM317HV TO-220 (3) 14.986 mm × 10.16 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

4 Revision History

Changes from C Revision (April 2013) to D Revision

  • Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go

Changes from B Revision (November 2004) to C Revision

  • Changed layout of National Data Sheet to TI formatGo