SLVSA67F February 2010 – April 2020 TPS62400-Q1 , TPS62402-Q1 , TPS62404-Q1 , TPS62405-Q1
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Parameter Measurement Information
- 9 Detailed Description
-
10Application and Implementation
- 10.1 Application Information
- 10.2
Typical Application
- 10.2.1 Design Requirements
- 10.2.2
Detailed Design Procedure
- 10.2.2.1
Output Voltage Setting
- 10.2.2.1.1 Converter 1 Adjustable Default Output-Voltage Setting: TPS62400-Q1
- 10.2.2.1.2 Converter 1 Fixed Default Output-Voltage Setting (TPS62402-Q1, TPS62404-Q1, and TPS62405-Q1)
- 10.2.2.1.3 Converter 2 Adjustable Default Output-Voltage Setting (TPS62400-Q1):
- 10.2.2.1.4 Converter 2 Fixed Default Output-Voltage Setting
- 10.2.2.2 Output Filter Design (Inductor and Output Capacitor)
- 10.2.2.1
Output Voltage Setting
- 10.2.3 Application Curves
- 10.3 System Examples
- 11Power Supply Recommendations
- 12Layout
- 13Device and Documentation Support
- 14Mechanical, Packaging, and Orderable Information
10.2.2.1.1 Converter 1 Adjustable Default Output-Voltage Setting: TPS62400-Q1
Calculate the output voltage as:
Equation 4. 
where
- VREF = 0.6-V (typical) internal reference voltage
To keep the operating current to a minimum, TI recommends selecting R12 within a range of 180 kΩ to 360 kΩ. The sum of R12 and R11 must not exceed approximately 1 MΩ. For output voltages higher than 3.3 V, TI recommends choosing lower values than 180 kΩ for R12. Route the DEF_1 line away from noise sources, such as the inductor or the SW1 line. The FB1 line requires a direct connection to the output capacitor. A feedforward capacitor is not necessary.