ZHCSI17B December 2008 – May 2018 TPS650250
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
-
6 Specifications
- 6.1 Absolute Maximum Ratings
- 6.2 ESD Ratings
- 6.3 Recommended Operating Conditions
- 6.4 Thermal Information
- 6.5 Dissipation Ratings
- 6.6 Electrical Characteristics
- 6.7 Electrical Characteristics VDCDC1
- 6.8 Electrical Characteristics VDCDC2
- 6.9 Electrical Characteristics VDCDC3
- 6.10 Typical Characteristics
- 7 Detailed Description
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機(jī)械、封裝和可訂購信息
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RHB|32
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RHB|32
訂購信息
7.3.4 100% Duty Cycle Low Dropout Operation
The TPS650250x converters offer a low input to output voltage difference while still maintaining operation with the use of the 100% duty cycle mode. In this mode the P-channel switch is constantly turned on. This is particularly useful in battery-powered applications to achieve the longest operation time by taking full advantage of the whole battery voltage range. The minimum input voltage required to maintain DC regulation depends on the load current and output voltage and can be calculated as:
Equation 3. 
where
- Ioutmax = Maximum load current (note: ripple current in the inductor is zero under these conditions)
- RDSonmax = Maximum P-channel switch RDSon
- RL = DC resistance of the inductor
- Voutmin = Nominal output voltage minus 2% tolerance limit