SLUAAT3 November   2023 TPS56837

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Why Soft Start is Needed
  5. 2Soft Start Principle
    1. 2.1 General Principle
    2. 2.2 Internal and External Soft Start
  6. 3Behaviors Related to Soft Start of TPS56837
    1. 3.1 Soft Start Sequence
    2. 3.2 Soft Start Discharge
    3. 3.3 UVP Hiccup Time
  7. 4How to Co-Lay TPS56837 and TPS56637
    1. 4.1 Pinout Differences of TPS56837 and TPS56637
    2. 4.2 Co-lay Guidance TPS56837 and TPS56637
  8. 5Summary
  9. 6References

4.1 Pinout Differences of TPS56837 and TPS56637

Both TPS56837 and TPS56637 are 10-pin, VQFN-HR, RPA packages. Figure 4-1 are the pinouts of TPS56837 and TPS56637. The only difference between the two is pin 5.

The pin 5 of TPS56837 is a SS pin, which is the soft-start time configuration pin. Leaving SS pin floating leads to default 1.8-ms soft start time. Connecting an external capacitor between SS and AGND leads to longer soft start time.

The pin 5 of TPS56637 is a NC pin. NC pin must not be connected and stay floating during use.

GUID-20231121-SS0I-WJXP-MTBM-CNVR176V73JM-low.svgFigure 4-1 Pinouts of TPS56837 and TPS56637