SLVAFG8 February   2023 TPS22995H-Q1

 

  1.   Abstract
  2.   Trademarks
  3. 1Test setup
    1. 1.1 Schematic
    2. 1.2 Layout
    3. 1.3 Test Conditions
  4. 2Results
    1. 2.1 Functional Test Results
    2. 2.2 Base Measurements
    3. 2.3 Test 1: 100 kΩ Short From RT to GND 5 V
    4. 2.4 Test 2: 100 kΩ Short From RT to GND 1.8 V
    5. 2.5 Test 3: 100kΩ short from RT to VIN 5V
    6. 2.6 Test 4: 100 kΩ Short From RT to VIN 1.8 V
    7. 2.7 Test 5: 100 kΩ Short From RT to VOUT 5 V
    8. 2.8 Test 6: 100 kΩ Short From RT to VOUT 1.8 V
  5. 3Summary
  6. 4References
  7. 6Appendix A

Abstract

Many automotive applications exist in humid environments where conformal coating is necessary to prevent potential shorts between pins of ICs on the electrical control unit. These conformal coatings are expensive, increase manufacturing time, and make trouble shooting afterward very difficult. With more humidity resistant devices this conformal coating material does not have to be as extensive which can reduce prices and manufacturing time. The worst case resistive short due to humidity is expected to be 100 kΩ and the device needs to be tested adjacent pins-to-pins and each pin-to-ground showing the device still functions.