SNVSCC4C October   2023  – February 2025 LP5811

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 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
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Synchronous Boost Converter
        1. 7.3.1.1 Undervoltage Lockout
        2. 7.3.1.2 Enable and Soft Start
        3. 7.3.1.3 Switching Frequency
        4. 7.3.1.4 Current Limit Operation
        5. 7.3.1.5 Boost PWM Mode
        6. 7.3.1.6 Boost PFM Mode
      2. 7.3.2 Analog Dimming
      3. 7.3.3 PWM Dimming
      4. 7.3.4 Autonomous Animation Engine Control
        1. 7.3.4.1 Animation Engine Pattern
        2. 7.3.4.2 Sloper
        3. 7.3.4.3 Animation Engine Unit (AEU)
        4. 7.3.4.4 Animation Pause Unit (APU)
      5. 7.3.5 Protections and Diagnostics
        1. 7.3.5.1 Overvoltage Protection
        2. 7.3.5.2 Output Short-to-Ground Protection
        3. 7.3.5.3 LED Open Detections
        4. 7.3.5.4 LED Short Detections
        5. 7.3.5.5 Thermal Shutdown
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
    6. 7.6 Register Maps
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Application
      2. 8.2.2 Design Parameters
      3. 8.2.3 Detailed Design Procedure
        1. 8.2.3.1 Inductor Selection
        2. 8.2.3.2 Output Capacitor Selection
        3. 8.2.3.3 Input Capacitor Selection
        4. 8.2.3.4 Program Procedure
        5. 8.2.3.5 Programming Example
      4. 8.2.4 Application Performance Plots
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.4 Application Performance Plots

The following figures show the application performance plots.

LP5811 PWM Alignment Disabled
phase_align_a0 = 0h, phase_align_a1 = 0h, phase_align_a2 = 0h, PWM = 127
Figure 8-3 PWM Alignment Disabled
LP5811 PWM Alignment Enabled
phase_align_a0 = 1h, phase_align_a1 = 2h, phase_align_a2 = 3h, PWM = 127
Figure 8-4 PWM Alignment Enabled
LP5811 Switching Waveform at Heavy Load
VIN = 3.6V, VOUT = 5V, IOUT = 1A
Figure 8-5 Switching Waveform at Heavy Load
LP5811 Start-up Waveform
VIN = 2.0V, VOUT = 3.3V, 6.6Ω resistance load
Figure 8-7 Start-up Waveform
LP5811 Load Transient
VIN = 3.6V, VOUT = 5V, IOUT = 400mA to 800mA with 20μs slew rate
Figure 8-9 Load Transient
LP5811 Load Sweep
VIN = 3.6V, VOUT = 5V, IOUT = 0A to 800mA Sweep
Figure 8-11 Load Sweep
LP5811 Output Short Protection (Entry)
VIN = 2.5V, VOUT = 3V, 6.6Ω resistance load
Figure 8-13 Output Short Protection (Entry)
LP5811 Switching Waveform at Light Load
VIN = 3.6V, VOUT = 5V, IOUT = 50mA
Figure 8-6 Switching Waveform at Light Load
LP5811 Shutdown Waveform
VIN = 2.0V, VOUT = 3.3V, 6.6Ω resistance load
Figure 8-8 Shutdown Waveform
LP5811 Line Transient
VIN = 2.5V to 4.6V with 20μs slew rate, VOUT = 5V
IOUT = 800mA
Figure 8-10 Line Transient
LP5811 Line Sweep
VIN = 0V to 3V Sweep, VOUT = 3V, 6.6Ω resistance load
Figure 8-12 Line Sweep
LP5811 Output Short Protection (Recover)
VIN = 2.5V, VOUT = 3V, 6.6Ω resistance load
Figure 8-14 Output Short Protection (Recover)