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TPS54260 3.5-V to 60-V Input, 2.5-A, Step-Down Converter With Eco-mode™
SLVSA86D
March 2010 – October 2018
TPS54260
PRODUCTION DATA.
CONTENTS
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TPS54260 3.5-V to 60-V Input, 2.5-A, Step-Down Converter With Eco-mode™
1
Features
2
Applications
3
Description
Device Images
Simplified Schematic
Efficiency vs Load Current
4
Revision History
5
Pin Configuration and Functions
Pin 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
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 Output Current
7.3.3
Pulse-Skip Eco-Mode
7.3.4
Low-Dropout Operation and Bootstrap Voltage (BOOT)
7.3.5
Error Amplifier
7.3.6
Voltage Reference
7.3.7
Adjusting the Output Voltage
7.3.8
Enable and Adjusting Undervoltage Lockout
7.3.9
Slow-Start / Tracking Pin (SS/TR)
7.3.10
Overload Recovery Circuit
7.3.11
Sequencing
7.3.12
Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
7.3.13
Overcurrent Protection and Frequency Shift
7.3.14
Selecting the Switching Frequency
7.3.15
How to Interface to RT/CLK Pin
7.3.16
Powergood (PWRGD Pin)
7.3.17
Overvoltage Transient Protection
7.3.18
Thermal Shutdown
7.3.19
Small Signal Model for Loop Response
7.3.20
Simple Small Signal Model for Peak Current Mode Control
7.3.21
Small Signal Model for Frequency Compensation
7.4
Device Functional Modes
7.4.1
Operation Near Minimum Input Voltage
7.4.2
Operation With Enable Control
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
3.3-V Output Application
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Custom Design With WEBENCH® Tools
8.2.1.2.2
Selecting the Switching Frequency
8.2.1.2.3
Output Inductor Selection (LO)
8.2.1.2.4
Output Capacitor
8.2.1.2.5
Catch Diode
8.2.1.2.6
Input Capacitor
8.2.1.2.7
Slow-Start Capacitor
8.2.1.2.8
Bootstrap Capacitor Selection
8.2.1.2.9
Undervoltage Lock Out Set Point
8.2.1.2.10
Output Voltage and Feedback Resistors Selection
8.2.1.2.11
Compensation
8.2.1.2.12
Discontinuous Mode and Eco-Mode Boundary
8.2.1.2.13
Power Dissipation Estimate
8.2.1.3
Application Curves
8.2.2
Inverting Power Supply
8.2.3
Split-Rail Power Supply
8.2.4
12-V to 3.8-V GSM Power Supply
8.2.5
24-V to 4.2-V GSM Power Supply
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
Third-Party Products Disclaimer
11.1.2
Development Support
11.1.2.1
Custom Design With WEBENCH® Tools
11.2
Receiving Notification of Documentation Updates
11.3
Community Resources
11.4
Trademarks
11.5
Electrostatic Discharge Caution
11.6
Glossary
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DGQ|10
MPDS043F
DRC|10
MPDS117L
Thermal pad, mechanical data (Package|Pins)
DGQ|10
PPTD325B
DRC|10
QFND013N
Orderable Information
slvsa86d_oa
slvsa86d_pm
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DATA SHEET
TPS54260 3.5-V to 60-V Input, 2.5-A, Step-Down Converter With Eco-mode™
1
Features
3.5-V to 60-V Input Voltage Range
200-mΩ High-Side MOSFET
High Efficiency at Light Loads With a Pulse-Skipping Eco-mode™
138-μA Operating Quiescent Current
1.3-μA Shutdown Current
100-kHz to 2.5-MHz Switching Frequency
Synchronizes to External Clock
Adjustable Slow Start and Sequencing
UV and OV Powergood Output
Adjustable UVLO Voltage and Hysteresis
0.8-V Internal Voltage Reference
10-Pin MSOP and
10-Pin 3-mm × 3-mm VSON With PowerPAD™ Packages
Create a Custom Design Using the TPS54260 With
WEBENCH® Power Designer
2
Applications
12-V, 24-V and 48-V Industrial and Commercial Low-Power Systems
GSM, GPRS Modules in Fleet Management, E-Meters, and Security Systems