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TPS54308 4.5-V to 28-V Input, 3-A Output, Synchronous 350-kHz FCCM Step-Down Converter in SOT23 Package
SLUSCV2A
June 2017 – April 2021
TPS54308
PRODUCTION DATA
CONTENTS
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TPS54308 4.5-V to 28-V Input, 3-A Output, Synchronous 350-kHz FCCM Step-Down Converter in SOT23 Package
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
Timing Requirements
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
Force Continuous Conduction Mode (FCCM)
7.3.3
Error Amplifier
7.3.4
Slope Compensation and Output Current
7.3.5
Enable and Adjusting Undervoltage Lockout
7.3.6
Safe Start-Up into Pre-Biased Outputs
7.3.7
Voltage Reference
7.3.8
Adjusting Output Voltage
7.3.9
Internal Soft Start
7.3.10
Bootstrap Voltage (BOOT)
7.3.11
Overcurrent Protection
7.3.11.1
High-Side MOSFET Overcurrent Protection
7.3.11.2
Low-Side MOSFET Overcurrent Protection
7.3.12
Output Overvoltage Protection (OVP)
7.3.13
Thermal Shutdown
7.4
Device Functional Modes
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
TPS54308 8-V to 28-V Input, 5-V Output Converter
8.2.2
Design Requirements
8.2.3
Detailed Design Procedure
8.2.3.1
Custom Design With WEBENCH® Tools
8.2.3.2
Input Capacitor Selection
8.2.3.3
Bootstrap Capacitor Selection
8.2.3.4
Output Voltage Set Point
8.2.3.5
Undervoltage Lockout Set Point
8.2.3.6
Output Filter Components
8.2.3.6.1
Inductor Selection
8.2.3.6.2
Output Capacitor Selection
8.2.3.6.3
Feedforward Capacitor
8.2.4
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
Third-Party Products Disclaimer
11.1.2
Development Support
11.1.2.1
Custom Design With WEBENCH® Tools
11.2
Receiving Notification of Documentation Updates
11.3
Support Resources
11.4
Trademarks
11.5
Electrostatic Discharge Caution
11.6
Glossary
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DDC|6
MPDS124I
Thermal pad, mechanical data (Package|Pins)
Orderable Information
sluscv2a_oa
sluscv2a_pm
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