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TPS54361-Q1 4.5-V to 60-V Input, 3.5-A, Step Down DC-DC Converter with Soft-Start and Eco-mode™
SLVSCC4B
April 2014 – January 2017
TPS54361-Q1
PRODUCTION DATA.
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TPS54361-Q1 4.5-V to 60-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
Timing Requirements
6.7
Switching Characteristics
6.8
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
Pulse-Skip Eco-mode
7.3.4
Low Dropout Operation and Bootstrap Voltage (BOOT)
7.3.5
Error Amplifier
7.3.6
Adjusting the Output Voltage
7.3.7
Enable and Adjust Undervoltage Lockout
7.3.8
Soft-Start/Tracking Pin (SS/TR)
7.3.9
Sequencing
7.3.10
Constant Switching Frequency and Timing Resistor (RT/CLK) Pin)
7.3.11
Accurate Current-Limit Operation and Maximum Switching Frequency
7.3.12
Synchronization to RT/CLK Pin
7.3.13
Power Good (PWRGD Pin)
7.3.14
Overvoltage Protection
7.3.15
Thermal Shutdown
7.3.16
Small Signal Model for Loop Response
7.3.17
Simple Small Signal Model for Peak Current Mode Control
7.3.18
Small Signal Model for Frequency Compensation
7.4
Device Functional Modes
7.4.1
Operation with V(VIN) = < 4.5 V (Minimum V(VIN))
7.4.2
Operation with EN Control
7.4.3
Alternate Power Supply Topologies
7.4.3.1
Inverting Power Supply
7.4.3.2
Split Rail Power Supply
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
Selecting the Switching Frequency
8.2.2.3
Output Inductor Selection (LO)
8.2.2.4
Output Capacitor
8.2.2.5
Catch Diode
8.2.2.6
Input Capacitor
8.2.2.7
Slow-Start Capacitor
8.2.2.8
Bootstrap Capacitor Selection
8.2.2.9
Undervoltage Lockout Set Point
8.2.2.10
Output Voltage and Feedback Resistors Selection
8.2.2.11
Compensation
8.2.2.12
Discontinuous Conduction Mode and Eco-mode Boundary
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
Power Dissipation Estimate
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
Development Support
11.2
Documentation Support
11.2.1
Related Documentation
11.2.2
Custom Design with WEBENCH® Tools
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
slvscc4b_oa
slvscc4b_pm
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