ZHCSQS5F April 2006 – January 2024 TPS5420
PRODUCTION DATA
- 1
- 1特性
- 2应用
- 3说明
- 4静电放电警告
- 5Ordering Information
- 6Pin Assignments
- 7Specifications
-
8Application Information
- 8.1 Functional Block Diagram
- 8.2
Detailed Description
- 8.2.1 Oscillator Frequency
- 8.2.2 Voltage Reference
- 8.2.3 Enable (ENA) and Internal Slow Start
- 8.2.4 Undervoltage Lockout (UVLO)
- 8.2.5 Boost Capacitor (BOOT)
- 8.2.6 Output Feedback (VSENSE)
- 8.2.7 Internal Compensation
- 8.2.8 Voltage Feed Forward
- 8.2.9 Pulse-Width-Modulation (PWM) Control
- 8.2.10 Overcurrent Limiting
- 8.2.11 Overvoltage Protection
- 8.2.12 Thermal Shutdown
- 8.2.13 PCB Layout
- 8.2.14 Application Circuits
- 8.2.15
Design Procedure
- 8.2.15.1 Design Parameters
- 8.2.15.2 Switching Frequency
- 8.2.15.3 Input Capacitors
- 8.2.15.4 Output Filter Components
- 8.2.15.5 Output Voltage Setpoint
- 8.2.15.6 Boot Capacitor
- 8.2.15.7 Catch Diode
- 8.2.15.8 Additional Circuits
- 8.2.15.9 Circuit Using Ceramic Output Filter Capacitors
- 8.2.15.10 Output Filter Component Selection
- 8.2.15.11 External Compensation Network
- 8.3 Advanced Information
- 8.4 Performance Graphs
- 9Revision History
8.2.15.5 Output Voltage Setpoint
The output voltage of the TPS5420 is set by a resistor divider (R1 and R2) from the output to the VSENSE pin. Calculate the R2 resistor value for the output voltage of 5 V using Equation 12:
Equation 12. 
For any TPS5420 design, start with an R1 value of 10 kΩ. R2 is then 3.24 kΩ.