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TPS55285 22V, 8A Buck-Boost Converter with I2C Interface
SLVSI72
April 2025
TPS55285
ADVANCE INFORMATION
CONTENTS
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TPS55285 22V, 8A Buck-Boost Converter with I2C Interface
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
Recommended Operating Conditions
5.3
Thermal Information
5.4
Electrical Characteristics
5.5
I2C Timing Characteristics
5.6
Typical Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
VCC Power Supply
6.3.2
Default Output Enable(OE) bit Status
6.3.3
Input Undervoltage Lockout
6.3.4
Enable and Programmable UVLO
6.3.5
Soft Start
6.3.6
Shutdown and Load Discharge
6.3.7
Switching Frequency
6.3.8
Switching Frequency Dithering
6.3.9
Inductor Current Limit
6.3.10
Internal Charge Path
6.3.11
Output Voltage Setting
6.3.12
Output Current Limit
6.3.13
Output Cable Voltage Drop Compensation
6.3.14
Input Overvoltage Protection
6.3.15
Output Overvoltage Protection
6.3.16
Output Short Circuit Protection
6.3.17
Thermal Shutdown
6.4
Device Functional Modes
6.4.1
PWM Mode
6.4.2
Power Save Mode
6.5
Programming
6.5.1
Data Validity
6.5.2
START and STOP Conditions
6.5.3
Byte Format
6.5.4
Acknowledge (ACK) and Not Acknowledge (NACK)
6.5.5
Target Address and Data Direction Bit
6.5.6
Single Read and Write
6.5.7
Multi-Read and Multi-Write
7
Register Maps
7.1
REF Register (Address = 0h, 1h) [reset = 10100100b, 00000001b]
7.2
IOUT_LIMIT Register (Address = 2h) [reset = 11100100b]
7.3
VOUT_SR Register (Address = 3h) [reset = 00000001b]
7.4
VOUT_FS Register (Address = 4h) [reset = 00000011b]
7.5
CDC Register (Address = 5h) [reset = 11110000b]
7.6
MODE Register (Address = 6h) [reset = 00100000b]
7.7
STATUS Register (Address = 7h) [reset = 00000001b]
7.8
Register Summary
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 Setting
8.2.2.3
Inductor Selection
8.2.2.4
Input Capacitor
8.2.2.5
Output Capacitor
8.2.2.6
Output Current Limit
8.2.2.7
Loop Stability
8.2.3
Application Curves
8.3
Power Supply Recommendations
8.4
Layout
8.4.1
Layout Guidelines
8.4.2
Layout Example
9
Device and Documentation Support
9.1
Device Support
9.1.1
Third-Party Products Disclaimer
9.1.2
Development Support
9.2
Receiving Notification of Documentation Updates
9.3
Support Resources
9.4
Trademarks
9.5
Electrostatic Discharge Caution
9.6
Glossary
10
Revision History
11
Mechanical, Packaging, and Orderable Information
11.1
Tape and Reel Information
83
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
VAL|15
Thermal pad, mechanical data (Package|Pins)
Orderable Information
slvsi72_oa
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Data Sheet
TPS55285 22V, 8A Buck-Boost Converter with I
2
C Interface