SNVSBB3 October   2019 LM5163

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application
      2.      Typical Application Efficiency, VOUT = 12 V
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin 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 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  Control Architecture
      2. 7.3.2  Internal VCC Regulator and Bootstrap Capacitor
      3. 7.3.3  Regulation Comparator
      4. 7.3.4  Internal Soft Start
      5. 7.3.5  On-Time Generator
      6. 7.3.6  Current Limit
      7. 7.3.7  N-Channel Buck Switch and Driver
      8. 7.3.8  Synchronous Rectifier
      9. 7.3.9  Enable/Undervoltage Lockout (EN/UVLO)
      10. 7.3.10 Power Good (PGOOD)
      11. 7.3.11 Thermal Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Active Mode
      3. 7.4.3 Sleep Mode
  8. 8 Application 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 Switching Frequency (RRON)
        3. 8.2.2.3 Buck Inductor (LO)
        4. 8.2.2.4 Output Capacitor (COUT)
        5. 8.2.2.5 Input Capacitor (CIN)
        6. 8.2.2.6 Type 3 Ripple Network
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Compact PCB Layout for EMI Reduction
      2. 10.1.2 Feedback Resistors
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Development Support
        1. 11.1.2.1 Custom Design With WEBENCH® Tools
    2. 11.2 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support 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

8.2.1 Design Requirements

The target full-load efficiency is 92% based on a nominal input voltage of 48 V and an output voltage of 12 V. The required input voltage range is 15 V to 100 V. The LM5163 delivers a fixed 12-V output voltage. The switching frequency is set by resistor RRON at 300 kHz. The output voltage soft-start time is 3 ms. Table 2 lists the required components. Refer to the LM5164-Q1EVM-041 User's Guide for more detail.

Table 2. List of Components

COUNT REF DES VALUE DESCRIPTION PART NUMBER MANUFACTURER
2 CIN 2.2 µF Capacitor, Ceramic, 2.2 µF, 100 V, X7R, 10% CGA6N3X7R2A225K230AB TDK
1 COUT 22 µF Capacitor, Ceramic, 22 µF, 25 V, X7R, 10% TMK325B7226KMHT Taiyo Yuden
1 CA 3300 pF Capacitor, Ceramic, 3300 pF, 16 V, X7R, 10% CGA3E2X7R2A332K080AA TDK
1 CB 56 pF Capacitor, Ceramic, 56 pF, 50 V, X7R, 10% C0603C560J5GACTU Kemet
1 CBST 2.2 nF Capacitor, Ceramic, 2200 pF, 50 V, X7R, 10% GCM155R71H222KA37D MuRata
1 LO 120 µH Inductor, 120 µH, 210 mΩ, 1.65 A MSS1260-124KL Coilcraft
1 RRON 100 kΩ Resistor, Chip, 100 k, 1%, 0.1 W, 0603 RG1608P-1053-B-T5 Susumu Co Ltd
1 RFB1 453 kΩ Resistor, Chip, 453 k, 1%, 0.1 W, 0603 RT0603BRD07448KL Yageo
1 RFB2 49.9 kΩ Resistor, Chip, 49.9 k, 1%, 0.1 W, 0603 RG1608P-4992-B-T5 Susumu Co Ltd
1 RA 226 kΩ Resistor, Chip, 226 k, 1%, 0.1W, 0603 RT0603BRD07226KL Yageo
1 U1 Wide VIN synchronous buck converter LM5163DDAR TI