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TPS5450 5-A, Wide Input Range, Step-Down Converter
SLVS757E
March 2007 – July 2022
TPS5450
PRODUCTION DATA
CONTENTS
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TPS5450 5-A, Wide Input Range, Step-Down Converter
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and Functions
Pin 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
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Oscillator Frequency
7.3.2
Voltage Reference
7.3.3
Enable (ENA) and Internal Slow-Start
7.3.4
Undervoltage Lockout (UVLO)
7.3.5
Boost Capacitor (BOOT)
7.3.6
Output Feedback (VSENSE) and Internal Compensation
7.3.7
Voltage Feed-Forward
7.3.8
Pulse-Width-Modulation (PWM) Control
7.3.9
Overcurrent Limiting
7.3.10
Overvoltage Protection
7.3.11
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Operation near Minimum Input Voltage
7.4.2
Operation With ENA 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
Switching Frequency
8.2.2.2
Output Voltage Setpoint
8.2.2.3
Input Capacitors
8.2.2.4
Output Filter Components
8.2.2.5
Inductor Selection
8.2.2.6
Capacitor Selection
43
8.2.2.7
Boot Capacitor
8.2.2.8
Catch Diode
8.2.2.9
Advanced Information
8.2.2.9.1
Output Voltage Limitations
8.2.2.9.2
Internal Compensation Network
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.3
Thermal Calculations
11
Device and Documentation Support
11.1
Device Support
11.1.1
Third-Party Products Disclaimer
11.2
Trademarks
11.3
Electrostatic Discharge Caution
11.4
Glossary
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
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