SNVS179F February   2003  – September 2015 LP3995

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 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 Input Test Signals
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Enable (EN)
      2. 8.3.2 Fast Turnoff
      3. 8.3.3 Low Output Noise
      4. 8.3.4 Output Capacitor
      5. 8.3.5 Thermal Overload Protection (TSD)
    4. 8.4 Device Functional Modes
      1. 8.4.1 Enable Operation
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 External Capacitors
        2. 9.2.2.2 Input Capacitor
        3. 9.2.2.3 Output Capacitor
        4. 9.2.2.4 No-Load Stability
        5. 9.2.2.5 Capacitor Characteristics
        6. 9.2.2.6 Noise Bypass Capacitor
        7. 9.2.2.7 Fast Turnoff and Turnon
        8. 9.2.2.8 Power Dissipation
        9. 9.2.2.9 Estimating Junction Temperature
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Examples
    3. 11.3 DSBGA Mounting
    4. 11.4 DSBGA Light Sensitivity
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

1 Features

  • Input Range: 2.5 V to 6 V
  • Accurate Output Voltage: ±75 mV / 2%
  • Typical Dropout with 150 mA Load: 60 mV
  • Virtually Zero Quiescent Current When Disabled
  • Low Output Voltage Noise
  • Stable With a 1-µF Output Capacitor
  • Output Current: 150 mA
  • Fast Turnon: 30 µs (Typical)
  • Fast Turnoff: 175 µs (Typical)
  • Stable With Ceramic Capacitor
  • Logic Controlled Enable
  • Fast Turnon
  • Active Disable for Fast Turnoff
  • Thermal-Overload and Short-Circuit Protection
  • −40 to +125°C Junction Temperature Range for Operation

2 Applications

  • GSM Portable Phones
  • CDMA Cellular Handsets
  • Wideband CDMA Cellular Handsets
  • Bluetooth Devices
  • Portable Information Appliances

3 Description

The LP3995 linear regulator is designed to meet the requirements of portable battery-powered applications, providing an accurate output voltage with low noise and low quiescent current. Ideally suited for powering RF and analog devices, this device can also be used to meet more general circuit needs in which a fast turnoff is essential.

For battery-powered applications the low dropout and low ground current provided by the device allows the lifetime of the battery to be maximized. The Enable(/Disable) control function allows the system to further extend the battery lifetime by reducing the power consumption to virtually zero. This function also incorporates an active discharge circuit on the output for faster device shutdown. Where the fast turnoff is not required the LP3999 linear regulator is recommended. The LP3995 also features internal protection against short-circuit currents and overtemperature conditions.

The LP3995 is designed to be stable with small 1-µF ceramic capacitors. The small outline of the LP3995 DSBGA package with the required ceramic capacitors can realize a system application within minimal board area. Performance is specified for a −40°C to +125°C temperature range.

The LP3995 is available in fixed output voltages from 1.5 V to 3.3 V, in DSBGA or WSON packages. For other package options or output-voltage options, contact your local TI sales office.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE
LP3995 DSBGA (5) 1.502 mm × 1.045 mm (MAX)
WSON (6) 3.29 mm × 2.92 mm (NOM)
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Circuit

LP3995 20034901.gif