ZHCSB85F November 2011 – October 2021 TPS62140 , TPS62140A , TPS62141 , TPS62142 , TPS62143
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Detailed Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
9.2.2.2.2.3 Soft-Start Capacitor
A capacitance connected between the SS/TR pin and AGND allows a user-programmable start-up slope of the output voltage. A constant-current source provides 2.5 μA to charge the external capacitance. The capacitor required for a given soft-start ramp time for the output voltage is given by:
Equation 10. 
where
- CSS is the capacitance (F) required at the SS/TR pin
- tSS is the desired soft-start ramp time (s).