SLVAF55 July   2021 TPS62130 , TPS62901 , TPS62902 , TPS62903

 

  1.   Trademarks
  2. 1Introduction
  3. 2Power Density
  4. 3Achieving a Smaller Solution
    1. 3.1 Smaller Package and Fewer External Components
    2. 3.2 Smart Configuration Pin
    3. 3.3 VSET
  5. 4Reducing Power Loss
    1. 4.1 Junction Temperature
    2. 4.2 Automatic Efficiency Enhancement (AEE™)
    3. 4.3 1MHz and 2.5MHz Switching Frequencies
    4. 4.4 Auto PFM/PWM vs. Forced PWM
  6. 5Application Flexibility
    1. 5.1 Quiescent Current
    2. 5.2 Lower and More Accurate Output Voltages
    3. 5.3 Capacitive Discharge
  7. 6Summary
  8. 7References

4.3 1MHz and 2.5MHz Switching Frequencies

The TPS6290x switching frequency can be set to 1MHz or 2.5MHz using the smart configuration pin. This is useful to provide the user the flexibly to set the switching frequency that fits the applications. To improve the efficiency and reduce switching losses of the converter, 1MHz can be selected, with the trade-off of using a larger inductor. This selection is ideal for applications that may not have huge space constrains, but efficiency or thermals are the main concern. For applications needing the smaller inductor, optimized overall solution size, and can afford a slight drop in efficiency, 2.5MHz is the ideal choice.



Figure 4-1 Efficiency Curves of TPS6290x vs. TPS621x0, VIN=12V, VO=1.2V, L=2.2uH (XGL4020-222ME)