SLVS889C October 2008 – November 2014 TPS54140
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Simplified Schematic
- 5 Revision History
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Fixed Frequency PWM Control
- 8.3.2 Slope Compensation Output Current
- 8.3.3 Bootstrap Voltage (BOOT)
- 8.3.4 Low Dropout Operation
- 8.3.5 Error Amplifier
- 8.3.6 Voltage Reference
- 8.3.7 Adjusting the Output Voltage
- 8.3.8 Enable and Adjusting Undervoltage Lockout
- 8.3.9 Slow Start and Tracking Pin (SS/TR)
- 8.3.10 Overload-Recovery Circuit
- 8.3.11 Sequencing
- 8.3.12 Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
- 8.3.13 Overcurrent Protection and Frequency Shift
- 8.3.14 Selecting the Switching Frequency
- 8.3.15 How to Interface to RT/CLK Pin
- 8.3.16 Power Good (PWRGD Pin)
- 8.3.17 Overvoltage Transient Protection
- 8.3.18 Thermal Shutdown
- 8.3.19 Small-Signal Model for Loop Response
- 8.3.20 Simple Small-Signal Model for Peak-Current Mode Control
- 8.3.21 Small-Signal Model for Frequency Compensation
- 8.4 Device Functional Modes
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical Application
- 9.2.1 Design Requirements
- 9.2.2
Detailed Design Procedure
- 9.2.2.1 Selecting the Switching Frequency
- 9.2.2.2 Output Inductor Selection (LO)
- 9.2.2.3 Output Capacitor
- 9.2.2.4 Catch Diode
- 9.2.2.5 Input Capacitor
- 9.2.2.6 Slow-Start Capacitor
- 9.2.2.7 Bootstrap Capacitor Selection
- 9.2.2.8 Undervoltage-Lockout Set Point
- 9.2.2.9 Output Voltage and Feedback Resistors Selection
- 9.2.2.10 Compensation
- 9.2.2.11 Power Dissipation Estimate
- 9.2.3 Application Curves
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
12 Device and Documentation Support
12.1 Device Support
12.1.1 Third-Party Products Disclaimer
TI'S PUBLICATION OF INFORMATION REGARDING THIRD-PARTY PRODUCTS OR SERVICES DOES NOT CONSTITUTE AN ENDORSEMENT REGARDING THE SUITABILITY OF SUCH PRODUCTS OR SERVICES OR A WARRANTY, REPRESENTATION OR ENDORSEMENT OF SUCH PRODUCTS OR SERVICES, EITHER ALONE OR IN COMBINATION WITH ANY TI PRODUCT OR SERVICE.
12.1.2 Development Support
For the WEBENCH Software Tool, go to www.TI.com/WEBENCH.
12.2 Documentation Support
12.3 Trademarks
Eco-mode, PowerPAD are trademarks of Texas Instruments.
WEBENCH is a registered trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
12.4 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
12.5 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.