SLVSA86D
March 2010 – October 2018
TPS54260
PRODUCTION DATA.
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
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
6.3
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
UNIT
V
I
Input supply voltage
3.5
60
V
I
O
Output current
2.5
A
T
J
Operating junction temperature
–40
150
°C