SNVSBK7A july   2021  – august 2023 LM5157

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Comparison Table
  7. 6 Pin Configuration and Functions
  8. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Line Undervoltage Lockout (UVLO/SYNC/EN Pin)
      2. 8.3.2  High Voltage VCC Regulator (BIAS, VCC Pin)
      3. 8.3.3  Soft Start (SS Pin)
      4. 8.3.4  Switching Frequency (RT Pin)
      5. 8.3.5  Dual Random Spread Spectrum – DRSS (MODE Pin)
      6. 8.3.6  Clock Synchronization (UVLO/SYNC/EN Pin)
      7. 8.3.7  Current Sense and Slope Compensation
      8. 8.3.8  Current Limit and Minimum On Time
      9. 8.3.9  Feedback and Error Amplifier (FB, COMP Pin)
      10. 8.3.10 Power-Good Indicator (PGOOD Pin)
      11. 8.3.11 Hiccup Mode Overload Protection (MODE Pin)
      12. 8.3.12 Maximum Duty Cycle Limit and Minimum Input Supply Voltage
      13. 8.3.13 Internal MOSFET (SW Pin)
      14. 8.3.14 Overvoltage Protection (OVP)
      15. 8.3.15 Thermal Shutdown (TSD)
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Standby Mode
      3. 8.4.3 Run Mode
        1. 8.4.3.1 Spread Spectrum Enabled
        2. 8.4.3.2 Hiccup Mode Protection Enabled
  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 Recommended Components
        3. 9.2.2.3 Inductor Selection (LM)
        4. 9.2.2.4 Output Capacitor (COUT)
        5. 9.2.2.5 Input Capacitor
        6. 9.2.2.6 Diode Selection
      3. 9.2.3 Application Curve
    3. 9.3 System Examples
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Examples
  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
      3. 12.1.3 Export Control Notice
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Support Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

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

9.2.2.2 Recommended Components

Table 9-2 shows a recommended list of materials for this typical application.

Table 9-2 List of Materials
REFERENCE DESIGNATOR QTY. SPECIFICATION MANUFACTURER(1) PART NUMBER
RT 1 RES, 9.53 k, 1%, 0.1 W, AEC-Q200 Grade 0, 0603 Vishay-Dale CRCW06039K53FKEA
RFBT 1 RES, 49.9 k, 1%, 0.1 W, 0603 Yageo America RC0603FR-0749K9L
RFBB 1 RES, 4.53 k, 1%, 0.1 W, AEC-Q200 Grade 0, 0603 Vishay-Dale CRCW06034K53FKEA
LM 1 Inductor, Shielded, Composite, 1.5 μH, 14 A, 0.01052 Ω, AEC-Q200 Grade 1, SMD Coilcraft XEL6030-152MEB
COUT1 6 CAP, CERM, 4.7 µF, 50 V, ±10%, X7R, 1210 TDK C3225X7R1H475K250AB
COUT2 (Bulk) 2 CAP, Aluminum Polymer, 100 µF, 50 V, ±20%, 0.025 Ω, AEC-Q200 Grade 2, D10xL10mm SMD Chemi-Con HHXB500ARA101MJA0G
CIN1 4 CAP, CERM, 10 µF, 50 V, ±10%, X7R, 1210 MuRata GRM32ER71H106KA12L
CIN2 (Bulk) 1 CAP, AL, 22 uF, 100 V, ±20%, 1.3 Ω, AEC-Q200 Grade 2, SMD Panasonic EEE-FK2A220P
D1 1 Diode, Schottky, 45 V, 10 A, AEC-Q101, CFP15 Nexperia PMEG045V100EPDAZ
RCOMP 1 RES, 2.61 k, 1%, 0.1 W, 0603 Yageo America RC0603FR-072K61L
CCOMP 1 CAP, CERM, 0.01 μF, 50 V, ±10%, X7R, 0603 Kemet C0603X103K5RACTU
CHF 1 CAP, CERM, 100 pF, 50 V, ±5%, C0G/NP0, AEC-Q200 Grade 0, 0603 TDK CGA3E2NP01H101J080AA
RUVLOT 1 RES, 61.9 k, 1%, 0.1 W, AEC-Q200 Grade 0, 0603 Vishay-Dale CRCW060361K9FKEA
RUVLOB 1 RES, 71.5 k, 1%, 0.1 W, AEC-Q200 Grade 0, 0603 Vishay-Dale CRCW060371K5FKEA
RUVLOS 1 RES, 0, 5%, 0.1 W, 0603 Yageo America RC0603JR-070RL
CSS 1 CAP, CERM, 0.022 μF, 50 V, ±10%, X7R, 0603 Kemet C0603X223K5RACTU
RBIAS 1 RES, 0, 5%, 0.1 W, 0603 Yageo America RC0603JR-070RL
CBIAS 1 CAP, CERM, 0.1 μF, 100 V, ±10%, X7R, AEC-Q200 Grade 1, 0603 MuRata GCJ188R72A104KA01D
CVCC 1 CAP, CERM, 1 µF, 16 V, ±10%, X7R, AEC-Q200 Grade 1, 0603 TDK CGA3E1X7R1C105K080AC
RVCC 1 RES, 5.1, 5%, 0.1 W, 0603 Yageo America RC0603JR-075R1L
RPG 1 RES, 100 k, 1%, 0.1 W, AEC-Q200 Grade 0, 0603 Vishay-Dale CRCW0603100KFKEA
RMODE 1 RES, 0, 5%, 0.1 W, 0603 Yageo America RC0603JR-070RL