SBOU323 June   2025 XTR200

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Evaluation Setup
    2. 2.2 Jumper Information
    3. 2.3 Output Mode Configuration
      1. 2.3.1 Current Mode Configuration
      2. 2.3.2 Voltage Mode Configuration
    4. 2.4 SET Pin
    5. 2.5 Error Flag
    6. 2.6 Power Requirements
    7. 2.7 Optional External Transistor
    8. 2.8 Optional External Protection Circuitry
  8. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  9. 4Additional Information
    1. 4.1 Trademarks
  10. 5Related Documentation
    1. 5.1 Supplemental Content

2.7 Optional External Transistor

The XTR200EVM PCB board layout includes a transistor footprint (Q1) for either a PNP or PMOS transistor. This transistor is not necessary for the XTR200 to operate as the XTR200 has an internal transistor. An external transistor can be used in applications that want to minimize the power dissipated in the device.

To properly choose an external transistor, the transistor must be rated for the maximum supply voltage and must be capable of dissipating the power generated by the load current and voltage across the transistor.

If Q1 is installed, R6 must be removed for the external transistor to operate properly.