SNOSAS1B November   2010  – September 2025 LMD18200QML

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Functional Diagram
  6. 5 Absolute Maximum Ratings
  7. 6 Operating Ratings
  8. 7 Quality Conformance Inspection
  9. 8 LMD18200 Electrical Characteristics DC Parameters
  10. 9 Typical Performance Characteristics
  11. 10Test Circuit
    1. 10.1 Switching Time Definitions
  12. 11Pinout Description
    1. 11.1 Application Information
      1. 11.1.1 TYPES OF PWM SIGNALS
      2. 11.1.2 SIGNAL TRANSITION REQUIREMENTS
      3. 11.1.3 USING THE CURRENT SENSE OUTPUT
      4. 11.1.4 USING THE THERMAL WARNING FLAG
      5. 11.1.5 SUPPLY BYPASSING
      6. 11.1.6 CURRENT LIMITING
      7. 11.1.7 INTERNAL CHARGE PUMP AND USE OF BOOTSTRAP CAPACITORS
      8. 11.1.8 INTERNAL PROTECTION DIODES
    2. 11.2 Typical Applications
      1. 11.2.1 FIXED OFF-TIME CONTROL
      2. 11.2.2 TORQUE REGULATION
      3. 11.2.3 VELOCITY REGULATION
  13. 12Revision History

11.1.5 SUPPLY BYPASSING

During switching transitions the levels of fast current changes experienced may cause troublesome voltage transients across system stray inductance.

It is normally necessary to bypass the supply rail with a high quality capacitor(s) connected as close as possible to the VS Power Supply (Pin 6) and GROUND (Pin 7). A 1 μF high-frequency ceramic capacitor is recommended. Care should be taken to limit the transients on the supply pin below the Absolute Maximum Rating of the device. When operating the chip at supply voltages above 40V a voltage suppressor (transorb) such as P6KE62A is recommended from supply to ground. Typically the ceramic capacitor can be eliminated in the presence of the voltage suppressor. Note that when driving high load currents a greater amount of supply bypass capacitance (in general at least 100 μF per Amp of load current) is required to absorb the recirculating currents of the inductive loads.