SLVAFH3 December   2022 TPS6213013A-Q1 , TPS62130A-Q1 , TPS62133A-Q1 , TPS62150A-Q1 , TPS62152A-Q1 , TPS62153A-Q1 , TPS62901-Q1 , TPS62902-Q1 , TPS62903-Q1 , TPS62992-Q1 , TPS62993-Q1

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2Achieving a Smaller Solution
    1. 2.1 Smaller Package and Fewer External Components
    2. 2.2 Smart Configuration Pin
    3. 2.3 VSET
  5. 3Reducing Power Loss
    1. 3.1 Junction Temperature
    2. 3.2 Automatic Efficiency Enhancement (AEE)
    3. 3.3 Quiescent Current
    4. 3.4 Auto PFM/PWM vs. Forced PWM
  6. 4Application Flexibility
    1. 4.1 1.0 MHz and 2.5 MHz Switching Frequencies
    2. 4.2 Lower and More Accurate Output Voltages
    3. 4.3 Output Voltage Discharge
    4. 4.4 Wettable Flanks
  7. 5Summary
  8. 6References

3.3 Quiescent Current

Low Iq is a key parameter for applications where the device is operated in standby or shutdown mode for the majority of the time. For battery powered applications, the quiescent current is critical to extending the life of the battery and improving light load efficiency. The TPS621x0A-Q1 has a low quiescent current of 17 µA. The TPS629xx-Q1 quiescent current is reduced even further to 4 µA. The batteries in these applications are meant to last an extended amount of time without having to be replaced. The reduction of the Iq by 76% will reduce the amount of current being drawn from the battery, therefore extending the battery life significantly. Figure 3-1 shows how a decrease in Iq boosts the efficiency at light loads and a decrease in MOSFET RDS(ON) improves the full load condition.

Figure 3-1 Efficiency Comparison of TPS6290x-Q1 vs. TPS621x0A-Q1, VIN=12 V, VO=1.2 V, L=2.2 uH (XGL4020-222MEC)