SNVS361E July   2007  – November 2015 LP38513

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 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 Protection
      2. 7.3.2 Enable
      3. 7.3.3 ERROR Flag
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enable Operation
      2. 7.4.2 ERROR Flag Operation
  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 Input Capacitor
          2. 8.2.2.1.2 Output Capacitor
        2. 8.2.2.2 Reverse Voltage
        3. 8.2.2.3 Power Dissipation
        4. 8.2.2.4 Estimating Junction Temperature
      3. 8.2.3 Application Curves
  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 Related Documentation
    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

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1 Features

  • Input Supply Voltage 2.25 V to 5.5 V
  • Conversions from 2.5-V Rail to 1.8-V Rail
  • Stable with Ceramic Capacitors
  • Low Ground Pin Current
  • Load Regulation of 0.1% for 10 mA to 3-A Load Current
  • 60-μA Typical Quiescent Current in Shutdown Mode
  • Specified Output Current of 3 A
  • Specified VOUT Accuracy of ±2.6% With
    TJ from 0°C to +125°C
  • ERROR Flag Indicates VOUT Status
  • Overtemperature and Overcurrent Protection
  • −40°C to +125°C Operating TJ Range

2 Applications

  • Microprocessor Power Supplies
  • GTL, GTL+, BTL, and SSTL Bus Terminators
  • Power Supplies for DSPs
  • SCSI Terminator
  • Post Regulators
  • Battery Chargers
  • Other Battery Powered Applications

3 Description

The LP38513 fast-response ultra-low dropout linear regulator operates from a 2.25-V to 5.5-V input supply. This device responds very quickly to step changes in line or load conditions, making it suitable for low-voltage microprocessor applications. Developed on a CMOS process, with a PMOS pass transistor, the LP38513 has low quiescent-current operation independent of the output load current.

  • Ground Pin Current: Typically 12 mA at 3-A load current.
  • Disable Mode: Typically 60 µA quiescent current when the enable (EN) pin is pulled low.
  • ERROR Flag: The ERROR flag goes low if VOUT falls more than typically 15% below the nominal value.
  • Precision Output Voltage: A specified VOUT accuracy of ±2.6% with TJ from 0°C to 125°C.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LP38513 TO-220 (5) 14.986 mm × 10.16 mm
DDPAK/TO-263 (5) 10.16 mm × 8.42 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application

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