SLVAFL4 august   2023 TPS61299

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction of Smart Watch Fast Transient Performance Requirements
  5. 2TPS61299 Fast Transient Performance Introduction
    1. 2.1 Fast Transient Mode Setting
  6. 3Standby Time Calculation
  7. 4Test Report Based on TPS61299 Solution
    1. 4.1 Load Transient Test for TPS61299 and TPS61099
    2. 4.2 Efficiency and Load Regulation
    3. 4.3 Output Ripple Test for TPS61299 and TPS61099
  8. 5Conclusion
  9. 6References

2.1 Fast Transient Mode Setting

TPS61299 supports high switching frequency and obtain high bandwidth, both contributing to the utra fast transient performance. As is seen in figure Figure 2-1, pulling the Vsel pin up to Vout can easily achieve 5V output voltage under fast mode.

TPS61299 can also supports other output voltage except 5V output voltage. Refer to Table 2-1 to select target output with fast transient performance by connecting Vsel pin to ground through an resistor.

GUID-20230820-SS0I-7NBH-SQQQ-LZNQJN6QT9TP-low.svg Figure 2-1 Schematic of TPS61299 Power Supply Under 5 V Vout Fast Transient Mode
Table 2-1 Vsel Pin Setting
Resistance (kΩ) VOUT_REG (V) Resistance (kΩ) VOUT_REG (V) Resistance (kΩ) VOUT_REG (V) Resistance (kΩ) VOUT_REG (V)
4.75 5.5(fast) 14.7 4.5(fast) 442 5(fast) Vout pin, 442 5(fast)