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TPS54362-Q1 3-A, 60-V Step-Down DC-DC Converter With Low I(q)
SLVS845G
March 2009 – August 2014
TPS54362-Q1
PRODUCTION DATA.
CONTENTS
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TPS54362-Q1 3-A, 60-V Step-Down DC-DC Converter With Low I(q)
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
Handling 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
6.8.1
Efficiency Data of Power Supply
6.8.2
Output Voltage Dropout
6.8.3
Quiescent and Standby Current
6.8.4
Reference Voltages
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Input Voltage
7.3.2
Function Mode
7.3.3
Output Voltage V(VReg)
7.3.4
Oscillator Frequency (RT)
7.3.5
Synchronization (SYNC)
7.3.6
Enable or Shutdown (EN)
7.3.7
Reset Delay (Cdly)
7.3.8
Reset Pin (RST)
7.3.9
Boost Capacitor (BOOT)
7.3.10
Soft Start (SS)
7.3.11
Short-Circuit Protection
7.3.12
Overcurrent Protection
7.3.13
Slew Rate Control (Rslew)
7.3.14
Thermal Shutdown
7.3.15
Regulation Voltage (VSENSE)
7.3.16
RESET Threshold (RST_TH)
7.3.17
Overvoltage Supervisor for V(VReg) (OV_TH)
7.3.18
Noise Filter on RST_TH and OV_TH Pins
7.3.19
Output Tolerances Based on Modes of Operation
7.3.20
Load Regulation and Line Regulation in Hysteretic Mode
7.3.21
Internal Undervoltage Lockout (UVLO)
7.3.22
Loop-Control Frequency Compensation
7.3.22.1
Type III Compensation
7.3.23
Bode Plot of Converter Gain
7.4
Device Functional Modes
7.4.1
Low-Power Mode (LPM)
7.4.2
Buck-Mode Low-Power-Mode Operation
7.4.3
External LPM Operation
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 (CO)
8.2.2.4
Flyback Schottky Diode
8.2.2.5
Input Capacitor, C(I)
8.2.2.6
Output Voltage and Feedback Resistor Selection
8.2.2.7
Overvoltage Resistor Selection
8.2.2.8
Reset-Threshold Resistor Selection
8.2.2.9
Low-Power Mode Threshold
8.2.2.10
Undervoltage Threshold for Low-Power Mode and Load-Transient Operation
8.2.2.11
Soft-Start Capacitor
8.2.2.12
Bootstrap Capacitor Selection
8.2.2.13
Guidelines for Compensation Components
8.2.2.14
Compensation
8.2.2.14.1
Calculate the Loop Compensation
8.2.2.14.2
Power Dissipation
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
Inductor
10.1.2
Input Filter Capacitors
10.1.3
Feedback
10.1.4
Traces and Ground Plane
10.2
Layout Example
11
Device and Documentation Support
11.1
Trademarks
11.2
Electrostatic Discharge Caution
11.3
Glossary
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
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