SNVS533D September   2007  – November 2014 LM4510

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 Handling 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 Feedback Fault Protection
      3. 7.3.3 Input Undervoltage Lock-Out
      4. 7.3.4 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Non-Synchronous Operation
      2. 7.4.2 Operation in Synchronous Continuous Conduction Mode (Cycle 1, Cycle 2)
        1. 7.4.2.1 Cycle 1 Description
        2. 7.4.2.2 Cycle 2 Description
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 2.7 V to 5.5 V Input with a 16 V Output
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Adjusting Output Voltage
          2. 8.2.1.2.2 Maximum Output Current
          3. 8.2.1.2.3 Inductor Selection
          4. 8.2.1.2.4 IL_AVE Check
          5. 8.2.1.2.5 Input Capacitor Selection
          6. 8.2.1.2.6 Output Capacitor Selection
          7. 8.2.1.2.7 Soft-Start Function and Soft-Start Capacitor Selection
          8. 8.2.1.2.8 Compensation Component Selection
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Flash and Torch Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curve
  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 Third-Party Products Disclaimer
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • 18 V@ 80 mA from 3.2 V Input
  • 5 V @ 280 mA from 3.2 V Input
  • No External Schottky Diode Required
  • 85% Peak Efficiency
  • Soft Start
  • True Shutdown Isolation
  • Stable with Small Ceramic or Tantalum Output Capacitors
  • Output Short-Circuit Protection
  • Feedback Fault Protection
  • Input Undervoltage Lock Out
  • Thermal Shutdown
  • 0.002-µA Shutdown Current
  • Wide Input Voltage Range: 2.7 V to 5.5 V
  • 1-MHz Fixed Frequency Operation
  • Low-profile 10-pin WSON Package (3 mm x 3 mm x 0.8 mm)

2 Applications

  • Organic LED Panel Power Supply
  • Charging Holster
  • White LED Backlight
  • USB Power Supply
  • Class D Audio Amplifier
  • Camera Flash LED Driver

3 Description

The LM4510 is a current mode step-up DC/DC converter with a 1.2-A internal NMOS switch designed to deliver up to 120 mA at 16 V from a Li-Ion battery.

The device's synchronous switching operation (no external Schottky diode) at heavy-load, and non-synchronous switching operation at light-load, maximizes power efficiency.

True shutdown function by synchronous FET and related circuitry ensures input and output isolation.

A programmable soft-start circuit allows the user to limit the amount of inrush current during start-up. The output voltage can be adjusted by external resistors.

The LM4510 features advanced short-circuit protection to maximize safety during output to ground short condition. During shutdown the feedback resistors and the load are disconnected from the input to prevent leakage current paths to ground.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LM4510 WSON (10) 3.00 mm x 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Typical Application Circuit

30031001.gif

Efficiency at VOUT = 16 V

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