ZHCSKG6 November 2019 TPS61391
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Application
- 8.2.1 Design Requirement
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 Selecting the Rectifier Diode
- 8.2.2.2 Selecting the Inductor
- 8.2.2.3 Selecting Output Capacitor
- 8.2.2.4 Selecting Filter Resistor and Capacitor
- 8.2.2.5 Setting the Output Voltage
- 8.2.2.6 Selecting Capacitor for CAP pin
- 8.2.2.7 Selecting Capacitor for AVCC pin
- 8.2.2.8 Selecting Capacitor for APD pin
- 8.2.2.9 Selecting the Resistors of MON1 or MON2
- 8.2.2.10 Selecting the Capacitors of MON1 or MON2
- 8.2.2.11 Selecting the Short Current Limit
- 8.2.3 Application Curves
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文档支持
- 12机械、封装和可订购信息
8.2.2.5 Setting the Output Voltage
The output voltage of the TPS61391 is externally adjustable using a resistor divider network. The relationship between the output voltage and the resistor divider is given by Equation 3.
Equation 3. 
where
- VOUT is the output voltage
- RUP the top divider resistor
- RDOWN is the bottom divider resistor
Choose RDOWN to be approximately 10 kΩ. Slightly increasing or decreasing RDOWN can result in closer output voltage matching when using standard value resistors. In this design, RDOWN = 10 kΩ and RUP = 487 kΩ, resulting in an output voltage of 60 V.