SNVSC73B January   2022  – September 2023 LMR38010

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 System Characteristics
    7. 7.7 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  Fixed Frequency Peak Current Mode Control
      2. 8.3.2  Adjustable Output Voltage
      3. 8.3.3  Enable
      4. 8.3.4  Switching Frequency and Synchronization (RT/SYNC)
      5. 8.3.5  Power-Good Flag Output
      6. 8.3.6  Minimum On Time, Minimum Off Time, and Frequency Foldback
      7. 8.3.7  Bootstrap Voltage
      8. 8.3.8  Overcurrent and Short Circuit Protection
      9. 8.3.9  Soft Start
      10. 8.3.10 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Auto Mode
      2. 8.4.2 Forced PWM Operation
      3. 8.4.3 Dropout
      4. 8.4.4 Minimum Switch On Time
  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 Choosing the Switching Frequency
        3. 9.2.2.3 FB for Adjustable Output
        4. 9.2.2.4 Inductor Selection
        5. 9.2.2.5 Output Capacitor Selection
        6. 9.2.2.6 Input Capacitor Selection
        7. 9.2.2.7 CBOOT
        8. 9.2.2.8 External UVLO
        9. 9.2.2.9 Maximum Ambient Temperature
      3. 9.2.3 Application Curves
    3. 9.3 Best Design Practices
    4. 9.4 Power Supply Recommendations
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
        1. 9.5.1.1 Ground and Thermal Considerations
      2. 9.5.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
        1. 10.1.1.1 Custom Design With WEBENCH® Tools
      2. 10.1.2 Third-Party Products Disclaimer
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

9.2.3 Application Curves

Unless otherwise specified the following conditions apply: VIN = 48 V, L = 15 µH , TA = 25°C.

GUID-20220123-SS0I-VJVN-MS6K-N6QMFKXCCVFG-low.png
LMR38010VOUT = 5 V400 kHz
Figure 9-3 Start-Up by VIN
GUID-20220123-SS0I-HD6J-KWL7-LG02LRHLML6T-low.png
LMR38010VOUT = 5 V

AC Coupled

No Load
Figure 9-5 PFM Switching
GUID-20220123-SS0I-LGK8-B8HT-8X0M36KNVXRN-low.png
LMR38010VOUT = 5 V1 A to Short
Figure 9-7 Short Circuit Applied
GUID-20220123-SS0I-CB3K-KJKN-CWMSCZHZD7SC-low.png

LMR38010

FPWM

VOUT = 5 V

Bias to 3 V

No Load
Figure 9-9 Start-Up with Prebias
GUID-20220123-SS0I-XBPS-KL0W-GQ6JVCC36QRJ-low.png
LMR38010VOUT = 5 V

(AC Coupled)

400 kHz
100 mA to 900 mA at 200 mA/µs
Figure 9-11 Load Transient
GUID-20220122-SS0I-KXB3-VLFB-RN6PS1VPTTWW-low.svg
LMR38010VOUT = 5 V

PFM Version

400 kHz
Figure 9-13 5-V Load Regulation
GUID-20220123-SS0I-W7BQ-WDKD-ZWCN0MXBZ3LR-low.png
LMR38010VOUT = 5 V400 kHz
Figure 9-4 Start-Up by EN
GUID-20220123-SS0I-KTR4-BVKK-K7H3RVR01HQC-low.png
LMR38010VOUT = 5 V

AC Coupled

400 kHz
Figure 9-6 Full Load Switching
GUID-20220123-SS0I-JTFR-WKRB-ZJM7GVV8G5GF-low.png
LMR38010VOUT = 5 VShort Recovery
Figure 9-8 Short-Circuit Recovery
GUID-20220123-SS0I-2MTZ-ZHTJ-TJXLTXHSW9Q2-low.png
LMR38010VOUT = 5 V400 kHz
Figure 9-10 Frequency Synchronization
GUID-20220123-SS0I-7KHR-Z7Q4-J2CW4SFGSMZV-low.png
LMR38010VOUT = 5 V

(AC Coupled)

400 kHz
10 V to 70 V at 200 V/ms
Figure 9-12 Line Transient
GUID-20220122-SS0I-94V7-BD2Q-BMN4M24SS7MN-low.svg
LMR38010VOUT = 12 V

PFM Version

400 kHz
Figure 9-14 12-V Load Regulation