SLVS004I April   1979  – August 2016 TL317

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristic
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 NPN Darlington Output Drive
      2. 7.3.2 Programmable Feedback
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation
      2. 7.4.2 Operation With Low Input Voltage
      3. 7.4.3 Operation in Light Loads
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Adjustable Voltage Regulator
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 0-V to 30-V Regulator Circuit
      3. 8.2.3 Regulator Circuit With Improved Ripple Rejection
      4. 8.2.4 Precision Current-Limiter Circuit
      5. 8.2.5 Tracking Preregulator Circuit
      6. 8.2.6 Slow-Turnon 15-V Regulator Circuit
      7. 8.2.7 50-mA Constant-Current Battery-Charger Circuit
      8. 8.2.8 Current-Limited 6-V Charger
      9. 8.2.9 High-Current Adjustable Regulator
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • Output Voltage Range Adjustable From
    1.25 V to 32 V When Used With an External
    Resistor Divider
  • Output Current Capability of 100 mA
  • Input Regulation Typically 0.01% Per
    Input-Voltage Change
  • Output Regulation Typically 0.5%
  • Ripple Rejection Typically 80 dB

2 Applications

  • Power Supplies
  • Portable Devices
  • Computing and Servers
  • Telecommunications
  • HVAC: Heating, Ventilation, and Air Conditioning
  • Desktop PC
  • Digital Signage
  • Programmable Logic Controller
  • Appliances

    • Functional Block Diagram

    TL317 fbd.gif

3 Description

The TL317 is an adjustable three-terminal positive-voltage regulator capable of supplying 100 mA over an output-voltage range of 1.25 V to 32 V. It is exceptionally easy to use and requires only two external resistors to set the output voltage.

This regulator offers full overload protection available only in integrated circuits. Included on the chip are current-limiting and thermal-overload protection. All overload-protection circuitry remains fully functional, even when ADJUSTMENT is disconnected. Normally, no capacitors are required unless the device is situated far from the input filter capacitors, in which case an input bypass is required. An optional output capacitor can be added to improve transient response. ADJUSTMENT can be bypassed to achieve very high ripple rejection.

In addition to replacing fixed regulators, the TL317 regulator is useful in a wide variety of other applications. Because 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. Its primary application is that of a programmable output regulator, but by connecting a fixed resistor between ADJUSTMENT and OUTPUT, this device can be used as a precision current regulator. Supplies with electronic shutdown can be achieved by clamping ADJUSTMENT to ground, programming the output to 1.25 V, where most loads draw little current.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TL317D SOIC (8) 4.90 mm × 3.90 mm
TL317PW TSSOP (8) 4.30 mm × 3.00 mm
TL317PS SOP (8) 6.20 mm × 5.30 mm
TL317LP TO-92 (3) 4.83 mm × 3.68 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

4 Revision History

Changes from H Revision (September 2011) to I Revision

  • Added 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 sectionGo
  • Deleted Ordering Information table, see POA at the end of the datasheet.Go

Changes from G Revision (September 2009) to H Revision

  • Changed datasheet format from QuickSilver to DocZoneGo
  • Changed low end output voltage range from 1.2 V to 1.25Go
  • Added MIN value of 2.5 V for VI – VO parameter in the Recommended Operating Conditions tableGo