SLUSF22
November 2024
TPS54538
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Typical Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
Fixed Frequency Peak Current Mode
6.3.2
Mode Selection
6.3.3
Voltage Reference
6.3.4
Output Voltage Setting
6.3.5
Switching Frequency Selection / Synchronization
6.3.6
Phase Shift
6.3.7
Enable and Adjusting Undervoltage Lockout
6.3.8
External Soft Start and Prebiased Soft Start
6.3.9
Power Good
6.3.10
Minimum On Time, Minimum Off Time, and Frequency Foldback
6.3.11
Frequency Spread Spectrum
6.3.12
Overvoltage Protection
6.3.13
Overcurrent and Undervoltage Protection
6.3.14
Thermal Shutdown
6.4
Device Functional Modes
6.4.1
Modes Overview
6.4.2
Heavy Load Operation
6.4.3
Pulse Frequency Modulation
6.4.4
Forced Continuous Conduction Modulation
6.4.5
Dropout Operation
6.4.6
Minimum On-Time Operation
6.4.7
Shutdown Mode
7
Application and Implementation
7.1
Application Information
7.2
Typical Application
7.2.1
Design Requirements
7.2.2
Detailed Design Procedure
7.2.2.1
Custom Design With WEBENCH® Tools
7.2.2.2
Output Voltage Resistors Selection
7.2.2.3
Choosing Switching Frequency
7.2.2.4
Soft-Start Capacitor Selection
7.2.2.5
Output Inductor Selection
7.2.2.6
Output Capacitor Selection
7.2.2.7
Input Capacitor Selection
7.2.2.8
Feedforward Capacitor CFF Selection
7.2.2.9
Maximum Ambient Temperature
7.2.3
Application Curves
7.3
Best Design Practices
7.4
Power Supply Recommendations
7.5
Layout
7.5.1
Layout Guidelines
7.5.2
Layout Example
8
Device and Documentation Support
8.1
Device Support
8.1.1
Third-Party Products Disclaimer
8.1.2
Development Support
8.1.2.1
Custom Design With WEBENCH® Tools
8.2
Documentation Support
8.2.1
Related Documentation
8.3
Receiving Notification of Documentation Updates
8.4
Support Resources
8.5
Trademarks
8.6
Electrostatic Discharge Caution
8.7
Glossary
9
Revision History
10
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RQF|9
MPQF566
Thermal pad, mechanical data (Package|Pins)
Orderable Information
slusf22_oa
8.2
Documentation Support