SNAS491C February   2010  – January 2025 LM48580

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics: VDD = 3.6 V #GUID-238D0643-98EF-4676-B2E1-A584A5DF74F7/SNAS491599
    6. 5.6 Typical Performance Characteristics
  7.   Parameter Measurement Information
  8. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Class H Operation
      2. 6.3.2 Properties of Piezoelectric Elements
      3. 6.3.3 Differential Amplifier Explanation
      4. 6.3.4 Thermal Shutdown
      5. 6.3.5 Gain Setting
    4. 6.4 Device Functional Modes
      1. 6.4.1 Shutdown Function
  9. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
        1. 7.2.1.1 Proper Selection of External Components
          1. 7.2.1.1.1 Boost Converter Capacitor Selection
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Boost Converter Output Capacitor Selection
          1. 7.2.2.1.1 Inductor Selection
          2. 7.2.2.1.2 Diode Selection
        2. 7.2.2.2 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  10. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Community Resources
    4. 8.4 Trademarks
  11. 9 Revision History
  12. 10Mechanical, Packaging, and Orderable Information
7.2.2.1.1 Inductor Selection

The LM48580 boost converter is designed for use with a 4.7 μH inductor. Table 7-1 lists various inductors and their manufacturers. Choose an inductor with a saturation current rating greater than the maximum operating peak current of the LM48580 (> 1 A). This ensures that the inductor does not saturate, preventing excess efficiency loss, over heating and possible damage to the inductor. Additionally, choose an inductor with the lowest possible DCR (series resistance) to further minimize efficiency losses.

Table 7-1 Recommended Inductors(1)
MANUFACTURERPART#INDUCTANCE/ISAT
Taiyo YudenBRL3225T4R7M4.7 µH/1.1 A
CoilcraftLP30154.7 µH/1.1 A