Datasheet TPS62933 (Texas Instruments) - 4

link to page 4 link to page 21
TPS62933, TPS62932 , TPS62933F, TPS62933P, TPS62933O
SLUSEA4D – JUNE 2021 – REVISED AUGUST 2022
www.ti.com Table 7-1. Pin Functions (continued) Pin Type
(1)
Description Name NO.
TPS62932, TPS62933, and TPS62933F soft-start control pin. An external capacitor connected to this pin sets the internal voltage reference rising time. See Section 9.3.7 for A details. A minimum 6.8-nF ceramic capacitor must be connected at this pin, which sets the SS/PG 7 minimum soft-start time to approximately 1 ms. Do not float. TPS62933P and TPS62933O open-drain power good indicator, which is asserted low if A output voltage is out of PG threshold, overvoltage, or if the device is under thermal shutdown, EN shutdown, or during soft start. Output feedback input. Connect FB to the tap of an external resistor divider from the output FB 8 A to GND to set output voltage. (1) A = Analog, P = Power, G = Ground 4 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: TPS62933 TPS62932 TPS62933F TPS62933P TPS62933O Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Description (continued) 6 Device Comparison Table 7 Pin Configuration and Functions 8 Specifications 8.1 Absolute Maximum Ratings 8.2 ESD Ratings 8.3 Recommended Operating Conditions 8.4 Thermal Information 8.5 Electrical Characteristics 8.6 Typical Characteristics 9 Detailed Description 9.1 Overview 9.2 Functional Block Diagram 9.3 Feature Description 9.3.1 Fixed Frequency Peak Current Mode 9.3.2 Pulse Frequency Modulation 9.3.3 Voltage Reference 9.3.4 Output Voltage Setting 9.3.5 Switching Frequency Selection 9.3.6 Enable and Adjusting Undervoltage Lockout 9.3.7 External Soft Start and Prebiased Soft Start 9.3.8 Power Good 9.3.9 Minimum On Time, Minimum Off Time, and Frequency Foldback 9.3.10 Frequency Spread Spectrum 9.3.11 Overvoltage Protection 9.3.12 Overcurrent and Undervoltage Protection 9.3.13 Thermal Shutdown 9.4 Device Functional Modes 9.4.1 Modes Overview 9.4.2 Heavy Load Operation 9.4.3 Light Load Operation 9.4.4 Out of Audio Operation 9.4.5 Forced Continuous Conduction Operation 9.4.6 Dropout Operation 9.4.7 Minimum On-Time Operation 9.4.8 Shutdown Mode 10 Application and Implementation 10.1 Application Information 10.2 Typical Application 10.2.1 Design Requirements 10.2.2 Detailed Design Procedure 10.2.2.1 Custom Design With WEBENCH® Tools 10.2.2.2 Output Voltage Resistors Selection 10.2.2.3 Choosing Switching Frequency 10.2.2.4 Soft-Start Capacitor Selection 10.2.2.5 Bootstrap Capacitor Selection 10.2.2.6 Undervoltage Lockout Setpoint 10.2.2.7 Output Inductor Selection 10.2.2.8 Output Capacitor Selection 10.2.2.9 Input Capacitor Selection 10.2.2.10 Feedforward Capacitor CFF Selection 10.2.2.11 Maximum Ambient Temperature 10.2.3 Application Curves 10.3 What to Do and What Not to Do 11 Power Supply Recommendations 12 Layout 12.1 Layout Guidelines 12.2 Layout Example 13 Device and Documentation Support 13.1 Device Support 13.1.1 Third-Party Products Disclaimer 13.1.2 Development Support 13.1.2.1 Custom Design With WEBENCH® Tools 13.2 Receiving Notification of Documentation Updates 13.3 Support Resources 13.4 Trademarks 13.5 Electrostatic Discharge Caution 13.6 Glossary 14 Mechanical, Packaging, and Orderable Information