ZHCSHQ2B November 2017 – May 2018 TPS62821 , TPS62822 , TPS62823
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 修訂歷史記錄
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Detailed Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機(jī)械、封裝和可訂購信息
封裝選項
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- DLC|8
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- DLC|8
訂購信息
9.2.2.7 Feed-forward Capacitor Selection
To improve regulation speed, TPS6282x preferably operates with a feed-forward capacitor, connected between VOUT and FB. The appropriate value is calculated using Equation 8.
space
Equation 8. 
space
Therewith, for typical values of feedback resistors (R2=100kΩ), the feed-forward capacitance is 120pF.
Figure 44 and Figure 45 show the results of a frequency domain analysis for both use cases, with and without a feed-forward capacitor. The larger unity gain frequency, caused by the feed forward capacitor, results in a significant improvement of the transient response.