SNVSBU4D june   2022  – august 2023 LM5177

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 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
  8. 7 Parameter Measurement Information
    1. 7.1 Gate Driver Rise Time and Fall Time
    2. 7.2 Gate Driver Dead (Transition) Time
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Power-On Reset (POR System)
      2. 8.3.2  Buck-Boost Control Scheme
        1. 8.3.2.1 Boost Mode
        2. 8.3.2.2 Buck Mode
        3. 8.3.2.3 Buck-Boost Mode
      3. 8.3.3  Power Save Mode
      4. 8.3.4  Supply Voltage Selection – VMAX Switch
      5. 8.3.5  Enable and Undervoltage Lockout
      6. 8.3.6  Oscillator Frequency Selection
      7. 8.3.7  Frequency Synchronization
      8. 8.3.8  Voltage Regulation Loop
      9. 8.3.9  Output Voltage Tracking
      10. 8.3.10 Slope Compensation
      11. 8.3.11 Configurable Soft Start
      12. 8.3.12 Peak Current Sensor
      13. 8.3.13 Current Monitoring and Current Limit Control Loop
      14. 8.3.14 Short Circuit - Hiccup Protection
      15. 8.3.15 nFLT Pin and Protections
      16. 8.3.16 Device Configuration Pin
      17. 8.3.17 Dual Random Spread Spectrum – DRSS
      18. 8.3.18 Gate Driver
    4. 8.4 Device Functional Modes
  10. 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  Custom Design with WEBENCH Tools
        2. 9.2.2.2  Frequency
        3. 9.2.2.3  Feedback Divider
        4. 9.2.2.4  Inductor and Current Sense Resistor Selection
        5. 9.2.2.5  Slope Compensation
        6. 9.2.2.6  Output Capacitor
        7. 9.2.2.7  Input Capacitor
        8. 9.2.2.8  UVLO Divider
        9. 9.2.2.9  Soft-Start Capacitor
        10. 9.2.2.10 MOSFETs QH1 and QL1
        11. 9.2.2.11 MOSFETs QH2 and QL2
        12. 9.2.2.12 Frequency Compensation
        13. 9.2.2.13 External Component Selection
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
      1. 9.3.1 Bi-Directional Power Backup
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Power Stage Layout
      2. 11.1.2 Gate Driver Layout
      3. 11.1.3 Controller Layout
    2. 11.2 Layout Example
  13. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
      2. 12.1.2 Development Support
        1. 12.1.2.1 Custom Design with WEBENCH Tools
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

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

9.2.2.13 External Component Selection

Table 9-3 Components Example for Typical Application
ReferenceDescriptionPart NumberComment
RCOMP1.91 kΩ
CCOMP147-nF, 50-V Ceramic Capacitor
CCOMP21.8-nF, 50-V Ceramic Capacitor
CSS18-nF, 50-V Ceramic Capacitor or 20-nF, 80-V Ceramic CapacitorGCM21B5C1H183JA16 or GCM21B5C1K203JA16
RFB,top71. 5kΩ
RFB,bot4.7 kΩ
RnFLT10 kΩ
RIMONOUT82 kΩ
CIN12× 10-µF, 50-V Ceramic CapacitorGCM32EC71H106KA03
CIN21× 100-μF, 63-V Aluminum Capacitor PCR1J101MCL1GS
M1 N-Channel 40-V MOSFET, RDS(on) = 4.3 mΩSQJ422EP
M2 N-Channel 40-V MOSFET, RDS(on) = 4.3 mΩSQJ422EP
M3 N-Channel 40-V MOSFET, RDS(on) = 4.3 mΩSQJ422EP
M4 N-Channel 40-V MOSFET, RDS(on) = 4.3 mΩSQJ422EP
RCS

1.00 mΩ

3xKRL2012E-C-R003-F
L11.8 μH, DCR = 3.2 mΩIHLP-5050FD-A1
COUT15× 10-µF, 50-V Ceramic CapacitorGCM32EC71H106KA03
COUT21× 100-μF, 63-V Aluminum Capacitor PCR1J101MCL1GS
RISNS4 mΩ KRL2012E-C-R004-F
CBST10.1-µF, 35-V Ceramic Capacitor GRT033R6YA104KE01
CBST20.1-µF, 35-V Ceramic Capacitor GRT033R6YA104KE01
CVCC47-µF, 6.3-V Ceramic CapacitorGRM188R60J476ME15D
RUVLO,top75 kΩ
RUVLO,bot20.5 kΩ
RSLOPE69.8 kΩ
RCFG13.3 kΩ
RRT75 kΩ