SNVS469F October   2006  – December 2015 LP5952

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  Electrical Characteristics: Quiescent Currents
    7. 6.7  Electrical Characteristics: Shutdown Currents
    8. 6.8  Electrical Characteristics: Enable Control
    9. 6.9  Electrical Characteristics: Thermal Protection
    10. 6.10 Electrical Characteristics: Transient Characteristics
    11. 6.11 Input and Output Capacitors (Recommended)
    12. 6.12 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 Dual-Rail Supply
      2. 7.3.2 No-Load Stability
      3. 7.3.3 Fast Turnon
      4. 7.3.4 Short-Circuit Protection
      5. 7.3.5 Thermal-Overload Protection
      6. 7.3.6 Reverse Current Path
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enable Operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Dual-Rail Linear Regulator
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 External Capacitors
          2. 8.2.1.2.2 Input Capacitor
          3. 8.2.1.2.3 Output Capacitor
          4. 8.2.1.2.4 Capacitor Characteristics
          5. 8.2.1.2.5 Power Dissipation and Device Operation
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Additional Application Circuit
  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 Device Support
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    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

1 Features

  • Input Voltage Range: 0.7 V to 4.5 V
  • 2.5 V ≤ VBATT ≤ 5.5 V
  • 0.5V ≤ VOUT ≤ 2 V
  • Ensured 350-mA Output Current
  • For ILOAD = 350 mA:
    • VBATT ≥ VOUT(NOM) + 1.5 V or 2.5 V
      (Whichever is Higher)
  • For ILOAD = 150 mA:
    • VBATT ≥ VOUT(NOM) + 1.3 V or 2.5 V
      (Whichever is Higher)
  • Excellent Load Transient Response: ±15 mV Typical
  • Excellent Line Transient Response: ±1 mV Typical
  • 50-µA Typical Quiescent Current from VBATT
  • 10-µA Typical Quiescent Current from VIN
  • 0.1-µA Typical Quiescent Current in Shutdown
  • Noise voltage = 100 µVRMS Typical
  • Operates from a Single Li-Ion Cell or 3-Cell NiMH/NiCd Battery
  • Thermal-Overload and Short-Circuit Protection

2 Applications

  • Mobile Phones
  • Hand-Held Radios
  • Personal Digital Assistants
  • Palm-Top PCs
  • Portable Instruments
  • Battery-Powered Devices

3 Description

The LP5952 is a dual-supply-rail linear regulator optimized for powering ultralow-voltage circuits from a single Li-Ion cell or 3-cell NiMH/NiCd battery.

In the typical post-regulation application VBATT is directly connected to the battery (range 2.5 V to
5.5 V), and VIN is supplied by the output voltage of the DC-DC converter (range 0.7 V to 4.5 V).

The device offers superior dropout and transient features combined with very low quiescent currents. In shutdown mode (Enable (EN) pin pulled low) the device turns off and reduces battery consumption to 0.1 µA (typical). The LP5952 also features internal protection against overtemperature, overcurrent, and undervoltage conditions.

Depending upon application, only one or two tiny surface-mount external components are required; performance is specified for a –40°C to +125°C junction temperature range. The device is available in fixed output voltages from 0.5 V to 2 V. For availability, please contact your local Texas Instruments sales office.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LP5952 DSBGA (5) 1.326 mm × 0.96 mm
USON (6) 2.00 mm × 2.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Circuit

LP5952 20208502.gif