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TPS55340-EP Integrated 5-A, 40-V Wide Input Range Boost/SEPIC/Flyback DC-DC Regulator
SLVSCG7A
July 2014 – September 2021
TPS55340-EP
PRODUCTION DATA
CONTENTS
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TPS55340-EP Integrated 5-A, 40-V Wide Input Range Boost/SEPIC/Flyback DC-DC Regulator
1
Features
2
Applications
3
Description
4
Revision History
5
Description (continued)
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
Handling Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Switching Frequency
8.3.2
Voltage Reference and Setting Output Voltage
8.3.3
Soft Start
8.3.4
Slope Compensation
8.3.5
Overcurrent Protection and Frequency Foldback
8.3.6
Enable and Thermal Shutdown
8.3.7
Undervoltage Lockout (UVLO)
8.3.8
Minimum On-Time and Pulse Skipping
8.3.9
Layout Considerations
8.3.10
Thermal Considerations
8.4
Device Functional Modes
8.4.1
Operation With VIN < 2.9 V (Minimum VIN)
8.4.2
Synchronization
8.4.3
Oscillator
9
Application and Implementation
9.1
Application Information
9.2
Typical Applications
9.2.1
Boost Converter Application
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.2.1
Selecting the Switching Frequency (R4)
9.2.1.2.2
Determining the Duty Cycle
9.2.1.2.3
Selecting the Inductor (L1)
9.2.1.2.4
Computing the Maximum Output Current
9.2.1.2.5
Selecting the Output Capacitor (C8 to C10)
9.2.1.2.6
Selecting the Input Capacitors (C2, C7)
9.2.1.2.7
Setting Output Voltage (R1, R2)
9.2.1.2.8
Setting the Soft-Start Time (C7)
9.2.1.2.9
Selecting the Schottky Diode (D1)
9.2.1.2.10
Compensating the Control Loop (R3, C4, C5)
9.2.1.3
Application Curves
9.2.2
SEPIC Converter Application
9.2.2.1
Design Requirements
9.2.2.2
Detailed Design Procedure
9.2.2.2.1
Selecting the Switching Frequency (R4)
9.2.2.2.2
Duty Cycle
9.2.2.2.3
Selecting the Inductor (L1)
9.2.2.2.4
Calculating the Maximum Output Current
9.2.2.2.5
Selecting the Output Capacitor (C8 to C10)
9.2.2.2.6
Selecting the Series Capacitor (C6)
9.2.2.2.7
Selecting the Input Capacitor (C2, C7)
9.2.2.2.8
Selecting the Schottky Diode (D1)
9.2.2.2.9
Setting the Output Voltage (R1, R2)
9.2.2.2.10
Setting the Soft-Start Time (C3)
9.2.2.2.11
MOSFET Rating Considerations
9.2.2.2.12
Compensating the Control Loop (R3, C4)
9.2.2.3
SEPIC Converter Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Examples
12
Device and Documentation Support
12.1
Device Support
12.1.1
Third-Party Products Disclaimer
12.2
Receiving Notification of Documentation Updates
12.3
Support Resources
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
Glossary
13
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
RTE|16
MPQF149D
Thermal pad, mechanical data (Package|Pins)
RTE|16
QFND525B
Orderable Information
slvscg7a_oa
slvscg7a_pm
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