SLCS144E July   2004  – October 2014 LM317L

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 NPN Darlington Output Drive
      2. 8.3.2 Overload Block
      3. 8.3.3 Programmable Feedback
    4. 8.4 Device Functional Modes
      1. 8.4.1 Normal operation
      2. 8.4.2 Operation With Low Input Voltage
      3. 8.4.3 Operation at Light Loads
      4. 8.4.4 Operation In Self Protection
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Input Capacitor
        2. 9.2.2.2 Output Capacitor
        3. 9.2.2.3 Feedback Resistors
        4. 9.2.2.4 Adjustment Terminal Capacitor
        5. 9.2.2.5 Design Options and Parameters
        6. 9.2.2.6 Output Voltage
        7. 9.2.2.7 Ripple Rejection
        8. 9.2.2.8 Input Short Protection
      3. 9.2.3 Application Curves
    3. 9.3 General Configurations
      1. 9.3.1 Regulator Circuit With Improved Ripple Rejection
      2. 9.3.2 0-V to 30-V Regulator Circuit
      3. 9.3.3 Precision Current-Limiter Circuit
      4. 9.3.4 Tracking Preregulator Circuit
      5. 9.3.5 Slow-Turn On 15-V Regulator Circuit
      6. 9.3.6 50-mA Constant-Current Battery-Charger Circuit
      7. 9.3.7 Current-Limited 6-V Charger
      8. 9.3.8 High-Current Adjustable Regulator
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Trademarks
    2. 12.2 Electrostatic Discharge Caution
    3. 12.3 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|8
  • PK|3
  • PW|8
  • LP|3
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7 Specifications

7.1 Absolute Maximum Ratings(1)

over operating temperature range (unless otherwise noted)
MIN MAX UNIT
Vl – VO Input-to-output differential voltage 35 V
TJ Operating virtual-junction temperature 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

7.2 Handling Ratings

MIN MAX UNIT
Tstg Storage temperature range –65 150 °C
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1) 0 3000 V
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins(2) 0 2000
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

7.3 Recommended Operating Conditions

MIN MAX UNIT
VO Output voltage 1.25 32 V
VI – VO Input-to-output voltage differential 2.5 32 V
IO Output current 2.5 100 mA
TJ Operating virtual-junction temperature LM317LC 0 125 °C
LM317LI –40 125

7.4 Thermal Information

THERMAL METRIC(1) LM317L UNIT
D
8 PINS		 LP
3 PINS		 PK
3 PINS		 PW
8 PINS
RθJA Junction-to-ambient thermal resistance 97.1 139.5 51.5 149.4 °C/W
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report (SPRA953).

7.5 Electrical Characteristics

over recommended operating virtual-junction temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS(1) MIN TYP MAX UNIT
Input voltage regulation(2) VI – VO = 5 V to 35 V TJ = 25°C 0.01 0.02 %V
IO = 2.5 mA to 100 mA 0.02 0.05
Ripple regulation VO = 10 V, f = 120 Hz 65 dB
VO = 10 V,
10-μF capacitor between ADJUSTMENT and ground		 66 80
Output voltage regulation VI = 5 V to 35 V, TJ = 25°C,
IO = 2.5 mA to 100 mA,		 VO ≤ 5 V 25 mV
VO ≥ 5 V 5 mV/V
VI = 5 V to 35 V,
IO = 2.5 mA to 100 mA		 VO ≤ 5 V 50 mV
VO ≥ 5 V 10 mV/V
Output voltage change with temperature TJ = 0°C to 125°C 10 mV/V
Output voltage long-term drift After 1000 hours at TJ = 125°C and VI – VO = 35 V 3 10 mV/V
Output noise voltage f = 10 Hz to 10 kHz, TJ = 25°C 30 μV/V
Minimum output current to maintain regulation VI – VO = 35 V 1.5 2.5 mA
Peak output current VI – VO ≤ 35 V 100 200 mA
ADJUSTMENT current 50 100 μA
Change in ADJUSTMENT current VI – VO = 2.5 V to 35 V, IO = 2.5 mA to 100 mA 0.2 5 μA
Reference voltage (output to ADJUSTMENT) VI – VO = 5 V to 35 V,
P ≤ rated dissipation		 IO = 2.5 mA to 100 mA, 1.2 1.25 1.3 V
(1) Unless otherwise noted, these specifications apply for the following test conditions: VI – VO = 5 V and IO = 40 mA. Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible. All characteristics are measured with a 0.1-μF capacitor across the input and a 1-μF capacitor across the output.
(2) Input voltage regulation is expressed here as the percentage change in output voltage per 1-V change at the input.

7.6 Typical Characteristics

deliadj_fixed.pngFigure 1. Change in Adjustment Current Over Temperature