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TPS54331 3-A, 28-V Input, Step Down DC-DC Converter With Eco-mode
SLVS839H
July 2008 – October 2023
TPS54331
PRODUCTION DATA
CONTENTS
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TPS54331 3-A, 28-V Input, Step Down DC-DC Converter With Eco-mode
1
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Switching Characteristics
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Fixed-Frequency PWM Control
7.3.2
Voltage Reference (VREF)
7.3.3
Bootstrap Voltage (BOOT)
7.3.4
Enable and Adjustable Input Undervoltage Lockout (VIN UVLO)
7.3.5
Programmable Slow Start Using SS Pin
7.3.6
Error Amplifier
7.3.7
Slope Compensation
7.3.8
Current-Mode Compensation Design
7.3.9
Overcurrent Protection and Frequency Shift
7.3.10
Overvoltage Transient Protection
7.3.11
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Eco-mode
7.4.2
Operation With VIN < 3.5 V
7.4.3
Operation With EN Control
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Custom Design with WEBENCH® Tools
8.2.2.2
Switching Frequency
8.2.2.3
Output Voltage Set-Point
8.2.2.4
Input Capacitors
8.2.2.5
Output Filter Components
8.2.2.5.1
Inductor Selection
8.2.2.6
Capacitor Selection
8.2.2.7
Compensation Components
8.2.2.8
Bootstrap Capacitor
8.2.2.9
Catch Diode
8.2.2.10
Output Voltage Limitations
8.2.2.11
Power Dissipation Estimate
8.2.3
Application Curves
8.3
Power Supply Recommendations
8.4
Layout
8.4.1
Layout Guidelines
8.4.2
Layout Example
8.4.3
Electromagnetic Interference (EMI) Considerations
9
Device and Documentation Support
9.1
Device Support
9.1.1
Development Support
9.1.1.1
Custom Design with WEBENCH® Tools
9.2
Support Resources
9.3
Receiving Notification of Documentation Updates
9.4
Trademarks
9.5
Electrostatic Discharge Caution
9.6
Glossary
10
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
D|8
MSOI002K
DDA|8
MPDS092F
Thermal pad, mechanical data (Package|Pins)
DDA|8
PPTD087E
Orderable Information
slvs839h_oa
slvs839h_pm
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TPS54331 3-A, 28-V Input, Step Down DC-DC Converter With Eco-mode