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TPS548B23 4V to 16V Input, 20A, Remote Sense, D-CAP4, Synchronous Buck Converter
SLVSHN0
September 2024
TPS548B23
ADVANCE INFORMATION
CONTENTS
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TPS548B23 4V to 16V Input, 20A, Remote Sense, D-CAP4, Synchronous Buck Converter
1
1
Features
2
Applications
3
Description
4
Device Comparison Table
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
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
D-CAP4 Control
7.3.2
Internal VCC LDO and Using External Bias On the VCC Pin
7.3.2.1
Powering the Device From a Single Bus
7.3.2.2
Powering the Device From a Split-Rail Configuration
7.3.3
Multifunction Configuration (CFG1-5) Pins
7.3.3.1
Multifunction Configuration (CFG1-2) Pins (Internal Feedback)
7.3.3.2
Multifunction Configuration (CFG1-2) Pins (External Feedback)
7.3.3.3
Multifunction Configuration (CFG3-5) Pins
7.3.4
Enable
7.3.5
Soft Start
7.3.6
Power Good
7.3.7
Overvoltage and Undervoltage Protection
7.3.8
Remote Sense
7.3.9
Low-side MOSFET Zero-Crossing
7.3.10
Current Sense and Positive Overcurrent Protection
7.3.11
Low-side MOSFET Negative Current Limit
7.3.12
Output Voltage Discharge
7.3.13
UVLO Protection
7.3.14
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Auto-Skip (PFM) Eco-mode Light Load Operation
7.4.2
Forced Continuous-Conduction Mode
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
Output Voltage Setting Point
8.2.2.2
Choose the Switching Frequency
8.2.2.3
Choose the Inductor
8.2.2.4
Choose the Output Capacitor
8.2.2.5
Choose the Input Capacitors (CIN)
8.2.2.6
VCC Bypass Capacitor
8.2.2.7
BOOT Capacitor
8.2.2.8
PG Pullup Resistor
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
Documentation Support
9.1.1
Related Documentation
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
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
VAN|19
Thermal pad, mechanical data (Package|Pins)
Orderable Information
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Data Sheet
TPS548B23
4V to 16V Input,
20
A, Remote Sense,
D-CAP4, Synchronous Buck Converter
1
Features
4V to 16V input voltage range
3.13V to 5.3V external VCC bias support
10mΩ and 3.3mΩ MOSFETs (V
VCC
= 3.3V)
20
A continuous output current
Optimized 19-pin WQFN-HR package for efficiency and thermal performance
±1.0% reference (VREF) for T
J
= –40°C to +125°C
0.5V
to 5.5V output voltage range
Differential remote sense
D-CAP4 with ultra fast load-step response
Supports all ceramic output capacitors
Selectable auto-skip Eco-mode for high light-load efficiency
Programmable valley current limit
600kHz, 800kHz, 1.0MHz, 1.2MHz selectable switching frequency:
Programmable soft-start time
Prebiased start-up capability
Open-drain power-good output
Overvoltage and undervoltage fault protection
3mm × 3mm (0.4mm pin pitch), 19-pin QFN package
Pin-to-pin compatible with 12A TPS548A23 and 6A TPS548623
2
Applications
Rack server and blade server
Data center switches
