SNVS769J March   2000  – December 2014 LM2940-N , LM2940C

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 (5 V and 8 V)
    6. 6.6 Electrical Characteristics (9 V and 10 V)
    7. 6.7 Electrical Characteristics (12 V and 15 V)
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Short-Circuit Current Limit
      2. 7.3.2 Overvoltage Shutdown (OVSD)
      3. 7.3.3 Thermal Shutdown (TSD)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation with Enable Control
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 External Capacitors
          1. 8.2.2.1.1 Minimum Capacitance
          2. 8.2.2.1.2 ESR Limits
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
    3. 10.3 Heatsinking
      1. 10.3.1 Heatsinking TO-220 Package Parts
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Related Links
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • NDE|3
  • NDG|3
  • KTT|3
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Pin Configuration and Functions

DDPAK/TO-263 (KTT) Package
3 Pins
Top View
882211.png
TO-220 (NDE) Package
4 Pins
Front View
882202.png
SOT-223 (DCY) Package
3 Pins
Front View
882242.png
DDPAK/TO-263 ( KTT) Package
Side View
882212.png
WSON (NGN) Package
8 Pins
Top View
882246.gif
Pin 2 and pin 7 are fused to center DAP
Pin 5 and 6 need to be tied together on PCB board

Pin Functions

PIN I/O DESCRIPTION
NAME NDE KTT DCY NGN
IN 1 1 1 3 I Unregulated input voltage.
GND 2 2 2 2 — Ground
OUT 3 3 3 5, 6 O Regulated output voltage. This pin requires an output capacitor to maintain stability. See Detailed Design Procedure for output capacitor details.
GND 4 4 4 7 — Ground
N/C — — — 1, 4, 8 — No connection