SNVS321O January   2005  – December 2015 LP38691 , LP38691-Q1 , LP38693 , LP38693-Q1

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: LP38691 and LP38693
    3. 6.3 ESD Ratings: LP38691-Q1 and LP38693-Q1
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Thermal Information
    6. 6.6 Electrical Characteristics
    7. 6.7 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 Enable (EN)
      2. 7.3.2 Thermal Overload Protection (TSD)
      3. 7.3.3 Foldback Current Limiting
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enable (EN)
      2. 7.4.2 Minimum Operating Input Voltage (VIN)
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Reverse Voltage
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Power Dissipation and Device Operation
        2. 8.2.2.2 External Capacitors
        3. 8.2.2.3 Input Capacitor
        4. 8.2.2.4 Output Capacitor
        5. 8.2.2.5 No-Load Stability
        6. 8.2.2.6 Capacitor Characteristics
        7. 8.2.2.7 RFI/EMI Susceptibility
        8. 8.2.2.8 Output Noise
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 WSON Mounting
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Related Links
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • Wide Input Voltage Range (2.7 V to 10 V)
  • All WSON Options are Available as AEC-Q100 Grade 1
  • 2% Output Accuracy (25°C)
  • Low Dropout Voltage: 250 mV at 500 mA (Typical,
    5 V Out)
  • Precision (Trimmed) Bandgap Reference
  • Ensured Specifications for –40°C to 125°C
  • 1-µA Off-State Quiescent Current
  • Thermal Overload Protection
  • Foldback Current Limiting
  • Ground Pin Current: 55 µA (typical) at full load
  • Enable Pin (LP38693)

2 Applications

  • Hard Disk Drives
  • Notebook Computers
  • Battery-Powered Devices
  • Portable Instrumentation

3 Description

The LP3869x low-dropout CMOS linear regulators provide tight output tolerance (2% typical), extremely low dropout voltage (250 mV at 500-mA load current, VOUT = 5 V), and excellent AC performance using ultralow equivalent series resistance (ESR) ceramic output capacitors.

The low thermal resistance of the WSON, SOT-223, and TO-252 packages allow use of the full operating current even in high ambient temperature environments.

The use of a PMOS power transistor means that no DC base-drive current is required to bias it, thus allowing ground pin current to remain below 100 µA regardless of load current, input voltage, or operating temperature.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LP38691 TO-252 (3) 6.58 mm × 6.10 mm
WSON (6) 3.00 mm × 3.00 mm
LP38693 SOT-223 (5) 6.50 mm × 3.56 mm
WSON (6) 3.00 mm × 3.00 mm
LP38691-Q1 WSON (6) 3.00 mm × 3.00 mm
LP38693-Q1
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Circuits

LP38691 LP38693 LP38691-Q1 LP38693-Q1 20126501.gif
* Minimum value required for stability
** WSON package devices only
LP38691 LP38693 LP38691-Q1 LP38693-Q1 20126502.gif
* Minimum value required for stability
** WSON package devices only