SLUSDA9C may   2018  – august 2023 LV3842

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 Timing Requirements
    7. 7.7 Switching Characteristics
    8. 7.8 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 Minimum ON-Time, Minimum OFF-Time and Frequency Foldback
      5. 8.3.5 Bootstrap Voltage
      6. 8.3.6 Overcurrent and Short-Circuit Protection
      7. 8.3.7 Soft Start
      8. 8.3.8 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Active Mode
      3. 8.4.3 CCM Mode
      4. 8.4.4 Light-Load Operation (PFM Version)
      5. 8.4.5 Light-Load Operation (FPWM Version)
  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 Output Voltage Set-Point
        2. 9.2.2.2 Inductor Selection
        3. 9.2.2.3 Output Capacitor Selection
        4. 9.2.2.4 Input Capacitor Selection
        5. 9.2.2.5 Bootstrap Capacitor
        6. 9.2.2.6 Undervoltage Lockout Set-Point
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Compact Layout for EMI Reduction
      3. 9.4.3 Feedback Resistors
      4. 9.4.4 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

7.8 Typical Characteristics

VIN = 12 V, fSW = 1.1 MHz, TA = 25°C, unless otherwise specified.

GUID-9FE0D134-D7B9-44F2-A3B3-AE0FF4B582D2-low.gif
VOUT = 3.3 V
Figure 7-1 Efficiency vs Load Current
GUID-235D9FEF-64EF-438A-B719-F0B4A2005C3E-low.gif
VOUT = 12 V
Figure 7-3 Efficiency vs Load Current
GUID-7EA26EF0-F948-41DE-AB56-C1A84F3973CD-low.gif
VOUT = 5 VFPWM version
Figure 7-5 Line Regulation
GUID-8047302D-196A-4BE8-821B-E02026CBA262-low.gif
VFB = 1.1 VPFM verison
Figure 7-7 IQ vs Temperature
GUID-5771A6D9-0958-4C51-96A9-67489778BA82-low.gif
Figure 7-9 Reference Voltage vs Temperature
GUID-8B02CC8E-A860-4994-BC0E-DCB6D2B92110-low.gif
VOUT = 5 V
Figure 7-2 Efficiency vs Load Current
GUID-54311FD0-3A7F-4187-BBEE-B5DA033085F8-low.gif
VOUT = 5 VFPWM version
Figure 7-4 Load Regulation
GUID-5C4FBE01-B99C-4AF4-90D1-89FA8D6115FE-low.gif
VOUT = 5 VFPWM version
Figure 7-6 Dropout
GUID-08BEA08A-65DA-41FC-B4B3-A6D9A4F5AECF-low.gif
Figure 7-8 VIN UVLO vs Temperature
GUID-FCCF09CB-C17C-4D0B-99B4-B02C4C22EAE2-low.gif
Figure 7-10 HS and LS Current Limit vs Temperature