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TPS54341 4.5-V to 42-V Input, 3.5-A Step-Down DC-DC Converter With Soft-Start And Eco-Mode™
SLVSC61A
November 2013 – October 2016
TPS54341
PRODUCTION DATA.
CONTENTS
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TPS54341 4.5-V to 42-V Input, 3.5-A Step-Down DC-DC Converter With Soft-Start And Eco-Mode™
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
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
Slope Compensation Output Current
7.3.3
Low Dropout Operation and Bootstrap Voltage (BOOT)
7.3.4
Error Amplifier
7.3.5
Adjusting the Output Voltage
7.3.6
Enable and Adjusting Undervoltage Lockout
7.3.7
Soft-Start/Tracking Pin (SS/TR)
7.3.8
Sequencing
7.3.9
Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
7.3.10
Accurate Current Limit Operation and Maximum Switching Frequency
7.3.11
Synchronization to RT/CLK Pin
7.3.12
Power Good (PWRGD Pin)
7.3.13
Overvoltage Protection
7.3.14
Thermal Shutdown
7.3.15
Small-Signal Model for Loop Response
7.3.16
Simple Small-Signal Model for Peak-Current-Mode Control
7.3.17
Small Signal Model for Frequency Compensation
7.4
Device Functional Modes
7.4.1
Pulse Skip Eco-mode
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
Selecting the Switching Frequency
8.2.2.2
Output Inductor Selection (LO)
8.2.2.3
Output Capacitor
8.2.2.4
Catch Diode
8.2.2.5
Input Capacitor
8.2.2.6
Slow-Start Capacitor
8.2.2.7
Bootstrap Capacitor Selection
8.2.2.8
Undervoltage Lockout Set Point
8.2.2.9
Output Voltage and Feedback Resistors Selection
8.2.2.10
Compensation
8.2.2.11
Discontinuous Conduction Mode and Eco-mode Boundary
8.2.2.12
Estimated Circuit Area
8.2.2.13
Power Dissipation Estimate
8.2.3
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
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Receiving Notification of Documentation Updates
11.4
Community Resources
11.5
Trademarks
11.6
Electrostatic Discharge Caution
11.7
Glossary
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DPR|10
MPSS046B
Thermal pad, mechanical data (Package|Pins)
Orderable Information
slvsc61a_oa
slvsc61a_pm
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