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TPS54618C-Q1Automotive 2.95-V to 6-V, 6-A, Synchronous Buck Converter
SLVSEW2A
September 2020 – August 2021
TPS54618C-Q1
PRODUCTION DATA
CONTENTS
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TPS54618C-Q1Automotive 2.95-V to 6-V, 6-A, Synchronous Buck 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
Timing Requirements
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
Slope Compensation and Output Current
7.3.3
Bootstrap Voltage (Boot) and Low Dropout Operation
7.3.4
Error Amplifier
7.3.5
Voltage Reference
7.3.6
Adjusting the Output Voltage
7.3.7
Enable and Adjusting Undervoltage Lockout
7.3.8
Soft-Start Pin
7.3.9
Sequencing
7.3.10
Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
7.3.11
Overcurrent Protection
7.3.12
Frequency Shift
7.3.13
Reverse Overcurrent Protection
7.3.14
Synchronize Using the RT/CLK Pin
7.3.15
Power Good (PWRGD Pin)
7.3.16
Overvoltage Transient Protection
7.3.17
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Simple Small Signal Model for Peak Current Mode Control
7.4.2
Small Signal Model for Frequency Compensation
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
Step One: Select the Switching Frequency
8.2.2.2
Step Two: Select the Output Inductor
8.2.2.3
Step Three: Choose the Output Capacitor
8.2.2.4
Step Four: Select the Input Capacitor
8.2.2.5
Step Five: Choose the Soft-Start Capacitor
8.2.2.6
Step Six: Select the Bootstrap Capacitor
8.2.2.7
Step Eight: Select Output Voltage and Feedback Resistors
8.2.2.7.1
Output Voltage Limitations
8.2.2.8
Step Nine: Select Loop Compensation Components
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.3
Power Dissipation Estimate
11
Device and Documentation Support
11.1
Device Support
11.1.1
Developmental Support
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)
RTE|16
MPQF149D
Thermal pad, mechanical data (Package|Pins)
RTE|16
QFND290G
Orderable Information
slvsew2a_oa
slvsew2a_pm
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