SNVS522I August   2007  – August 2015 LP38501-ADJ , LP38503-ADJ

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configurations 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 Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Stability and Phase Margin
      2. 7.3.2 Load Transient Response
      3. 7.3.3 Dropout Voltage
      4. 7.3.4 Reverse Current Path
      5. 7.3.5 Short-Circuit Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enable Operation (LP38501-ADJ Only)
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 External Capacitors
        2. 8.2.2.2 Input Capacitor
        3. 8.2.2.3 Output Capacitor
        4. 8.2.2.4 Setting The Output Voltage
        5. 8.2.2.5 RFI/EMI Susceptibility
        6. 8.2.2.6 Output Noise
        7. 8.2.2.7 Power Dissipation/Heatsinking
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Links
    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

5 Pin Configurations and Functions

KTT Package (LP38501)
5-Pin DDPAK/TO-263
Top View
LP38501-ADJ LP38503-ADJ 30028122.png
KTT Package (LP38503)
5-Pin DDPAK/TO-263
Top View
LP38501-ADJ LP38503-ADJ 30028121.png
NDQ Package (LP38501)
5-Pin TO-263
Top View
LP38501-ADJ LP38503-ADJ 30028162.png
NDQ Package (LP38503)
5-Pin TO-263
Top View
LP38501-ADJ LP38503-ADJ 30028163.png

Pin Functions

PIN TYPE DESCRIPTION
LP38501 LP38503 LP38501 LP38503
NAME DDPAK/TO-263 TO-263
ADJ 5 5 5 5 O Sets output voltage.
EN 1 — 1 — I Enable (LP38501-ADJ only). Pull high to enable the output, low to disable the output. This pin has no internal bias and must be either tied to the input voltage, or actively driven.
GND 3 3 3 3 G Ground
IN 2 2 2 2 I Input supply pin.
N/C — 1 — 1 — In the LP38503-ADJ, this pin has no internal connections. It can be left floating or used for trace routing.
OUT 4 4 4 4 O Regulated output voltage pin.
DAP √ √ √ √ — The DAP is used as a thermal connection to remove heat from the device to the circuit board DAP copper clad area which acts as the heatsink. The DAP is electrically connected to the backside of the die. The DAP must be connected to ground potential, but can not be used as the only ground connection.