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TPS5401 0.5-A, 42-V Input, Step-Down Converter
SLVSAB0B
December 2010 – November 2014
TPS5401
PRODUCTION DATA.
CONTENTS
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TPS5401 0.5-A, 42-V Input, Step-Down Converter
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
Voltage Reference
7.3.6
Adjusting the Output Voltage
7.3.7
Enabling and Adjusting Undervoltage Lockout
7.3.8
Slow-Start/Tracking Pin (SS/TR)
7.3.9
Overload Recovery Circuit
7.3.10
Sequencing
7.3.11
Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
7.3.12
Overcurrent Protection and Frequency Shift
7.3.13
Selecting the Switching Frequency
7.3.14
How to Interface to RT/CLK Pin
7.3.15
Power Good (PWRGD Pin)
7.3.16
Overvoltage Transient Protection
7.3.17
Thermal Shutdown
7.3.18
Current-Mode Compensation Design
7.4
Device Functional Modes
7.4.1
Pulse-Skip Eco-mode Control Scheme
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 Capacitor
8.2.2.4
Output Inductor Selection
8.2.2.5
Output Capacitor
8.2.2.6
Catch Diode
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
Compensation
8.2.2.11
Discontinuous Mode and Eco-mode Control-Scheme Boundary
8.2.2.12
Power Dissipation Estimate
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.3
Estimated Circuit Area
11
Device and Documentation Support
11.1
Device Support
11.1.1
Development Support
11.1.2
Third-Party Products Disclaimer
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Trademarks
11.4
Electrostatic Discharge Caution
11.5
Glossary
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
封装选项
机械数据 (封装 | 引脚)
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MPDS043F
散热焊盘机械数据 (封装 | 引脚)
DGQ|10
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订购信息
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