SNVSAG0A November   2016  – February 2017 LP5922

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 Input and Output Capacitors
    7. 6.7 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 Output Voltage
      2. 7.3.2 Enable
      3. 7.3.3 Output Automatic Discharge
      4. 7.3.4 Programmable Soft Start and Noise Reduction
      5. 7.3.5 Internal Current Limit
      6. 7.3.6 Thermal Overload Protection
      7. 7.3.7 Power Good Output
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enable (EN)
      2. 7.4.2 Undervoltage Lockout (UVLO)
      3. 7.4.3 Minimum Operating Input Voltage
  8. 8 Applications 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  Custom Design With WEBENCH® Tools
        2. 8.2.2.2  External Capacitors
        3. 8.2.2.3  Input Capacitor, CIN
        4. 8.2.2.4  Output Capacitor, COUT
        5. 8.2.2.5  Soft-Start and Noise-Reduction Capacitor, CSS/NR
        6. 8.2.2.6  Feed-Forward Capacitor, CFF
        7. 8.2.2.7  No-Load Stability
        8. 8.2.2.8  Power Dissipation
        9. 8.2.2.9  Estimating Junction Temperature
        10. 8.2.2.10 Recommended Continuous Operating Area
      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 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 Custom Design With WEBENCH® Tools
    2. 11.2 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 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: 1.3 V to 6 V
  • Low VIN Voltage Without Extra Bias Voltage
  • Adjustable Output Voltage: 0.5 V to 5 V
  • Low Dropout: 200 mV at 2-A Load
  • Low Output Voltage Noise: 25 μVRMS
  • Output Current: 2 A
  • –40˚C to +125°C Operating Junction Temperature
  • Programmable Soft Start Limits Inrush Current
  • 3-mm × 3-mm × 0.75-mm 10-Pin WSON Package
  • Thermal-Overload and Short-Circuit Protection
  • Output Voltage Tolerance: ±1.5%
  • Shutdown Supply Current : 0.1 μA
  • PSRR: 70 dB at 1 kHz
  • Power Good Output
  • Create a Custom Design Using the LP5922 With the WEBENCH® Power Designer

2 Applications

  • Space-Constrained Applications
  • Noise- and Ripple-Sensitive High Current Analog or RF Systems
  • Target Sectors
    • Medical, Test and Measurement Equipment
    • Portable and Consumer electronics
    • Telecom and Networking Cards
    • Wireless Infrastructure
    • Industrial Applications
  • Typical Systems
    • Radio Transceivers, Power Amplifiers, PLL/Synthesizer, Clocking, VCO, GPRS, 3G Modules, FPGAs, DSP, GPUs, and others

3 Description

The LP5922 is 2-A low dropout (LDO) linear regulator with 200-mV typical dropout voltage at maximum current levels. The LP5922 device can operate from a voltage rail down to 1.3 V without additional bias supply. System efficiency is maximized and power dissipation minimized by the low dropout and low VIN capability. The device also features low quiescent current and very low shutdown current.

The LP5922 device was designed to have high PSRR and low output noise to support sensitive analog applications without additional filtering. The output noise can be reduced even further by implementing a small capacitor on the SS/NR pin.

The output voltage is adjustable from 0.5 V to 5 V by an external resistor divider. Enable pin, adjustable soft start and optional Power Good features help with system power sequencing. Inrush current is controlled with the soft start and the device has short circuit and thermal protections.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LP5922 WSON (10) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

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Simplified Schematic

LP5922 simp_schem_snvsag0.gif

PSRR

LP5922 D014_SNVSAG0.gif