Datasheet TPS62933 (Texas Instruments) - 3

link to page 4 link to page 19
TPS62933, TPS62932 , TPS62933F, TPS62933P , TPS62933O www.ti.com
SLUSEA4D – JUNE 2021 – REVISED AUGUST 2022
5 Description (continued)
The ULQ (ultra-low quiescent) feature is beneficial for long battery lifetime. The switching frequency can be set by the configuration of the RT pin in the range of 200 kHz to 2.2 MHz, which can optimize system efficiency, solution size, and bandwidth. The soft-start time of the TPS62932, TPS62933, and TPS62933F can be adjusted by the external capacitor at the SS pin. The TPS62932, TPS62933, TPS62933P and TPS62933O are featured with frequency spread spectrum, which helps with lowering down EMI noise. The TPS6293x is in a small SOT583 (1.6 mm × 2.1 mm) package with 0.5-mm pin pitch, and has an optimized pinout for easy PCB layout and promotes good EMI performance.
6 Device Comparison Table Part Number Output Current PFM or FCCM or OOA SS or PG Pin
TPS62932 2 A PFM SS TPS62933 3 A PFM SS TPS62933F 3 A FCCM SS TPS62933P 3 A PFM PG TPS62933O 3 A OOA PG
7 Pin Configuration and Functions
RT 1 8 FB RT 1 8 FB EN 2 7 SS EN 2 7 PG VIN 3 6 BST VIN 3 6 BST GND 4 5 SW GND 4 5 SW
Figure 7-1. TPS62932, TPS62933, and TPS62933F Figure 7-2. TPS62933P and TPS62933O 8-Pin 8-Pin SOT583 DRL Package (Top View) SOT583 DRL Package (Top View) Table 7-1. Pin Functions Pin Type
(1)
Description Name NO.
Frequency programming input. Float for 500 kHz, tie to GND for 1.2 MHz, or connect to an RT 1 A RT timing resistor. See Section 9.3.5 for details. Enable input to the converter. Driving EN high or leaving this pin floating enables the EN 2 A converter. An external resistor divider can be used to implement an adjustable VIN UVLO function. Supply input pin to internal LDO and high-side FET. Input bypass capacitors must be directly VIN 3 P connected to this pin and GND. Ground pin. Connected to the source of the low-side FET as well as the ground pin for the GND 4 G controller circuit. Connect to system ground and the ground side of CIN and COUT. The path to CIN must be as short as possible. Switching output of the convertor. Internally connected to the source of the high-side FET SW 5 P and drain of the low-side FET. Connect to the power inductor. Bootstrap capacitor connection for high-side FET driver. Connect a high-quality, 100-nF BST 6 P ceramic capacitor from this pin to the SW pin. Copyright © 2022 Texas Instruments Incorporated Submit Document Feedback 3 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