SLVSB69C
June 2012 – September 2021
TPS54719
PRODUCTION DATA
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
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
Slow Start/Tracking Pin
7.3.9
Sequencing
7.4
Device Functional Modes
7.4.1
Constant Switching Frequency And Timing Resistor (RT Pin)
7.4.2
Overcurrent Protection
7.4.3
Frequency Shift
7.4.4
Reverse Overcurrent Protection
7.4.5
Power Good (PWRGD Pin)
7.4.6
Overvoltage Transient Protection
7.4.7
Thermal Shutdown
7.4.8
Small Signal Model For Loop Response
7.4.9
Simple Small Signal Model For Peak Current Mode Control
7.4.10
Small Signal Model For Frequency Compensation
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
High Frequency, 1.8-V Output Power Supply Design With Adjusted UVLO
8.2.2
Design Requirements
8.2.3
Detailed Design Procedure
8.2.3.1
Selecting The Switching Frequency
8.2.3.2
Output Inductor Selection
8.2.3.3
Output Capacitor
8.2.3.4
Input Capacitor
8.2.3.5
Slow-Start Capacitor
8.2.3.6
Bootstrap Capacitor Selection
8.2.3.7
Undervoltage Lockout Set Point
8.2.3.8
Output Voltage And Feedback Resistors Selection
8.2.3.9
Compensation
8.2.4
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.2.1
Power Dissipation Estimate
11
Device and Documentation Support
11.1
Receiving Notification of Documentation Updates
11.2
Support Resources
11.3
Trademarks
11.4
Electrostatic Discharge Caution
11.5
Glossary
12
Mechanical, Packaging, and Orderable Information
10.2
Layout Example
Figure 10-1
PCB Layout Example