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TPS81256 3-W, High Efficiency Step-Up Converter In MicroSiP Packaging
SLVSAZ9D
June 2012 – February 2018
TPS81256
PRODUCTION DATA.
CONTENTS
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TPS81256 3-W, High Efficiency Step-Up Converter In MicroSiP Packaging
1
Features
2
Applications
3
Description
Device Images
Typical Application
Efficiency vs Load Current
4
Revision History
5
Device Options
6
Pin Configuration and Functions
Pin Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Operation
8.3.2
Power-Save Mode
8.3.3
Current Limit Operation, Maximum Output Current
8.4
Device Functional Modes
8.4.1
Softstart, Enable
8.4.2
Load Disconnect and Reverse Current Protection
8.4.3
Undervoltage Lockout
8.4.4
Thermal Regulation
8.4.5
Thermal Shutdown
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Output Capacitor Selection CEXT
9.2.2.2
Input Capacitor Selection
9.2.3
Application Curves
9.3
System Examples
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
11.3
Surface Mount Information
11.4
Thermal and Reliability Information
12
Device and Documentation Support
12.1
Device Support
12.1.1
Third-Party Products Disclaimer
12.2
Community Resources
12.3
Trademarks
12.4
Electrostatic Discharge Caution
12.5
Glossary
13
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
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DATA SHEET
TPS81256 3-W, High Efficiency Step-Up Converter In MicroSiP Packaging
1
Features
91% Efficiency at 4MHz Operation
Wide V
IN
Range From 2.5V to 5.5V
I
OUT
≥550mA at V
OUT
= 5.0V, V
IN
≥3.3V
Fixed Output Voltage 5.0V
±2% Total DC Voltage Accuracy
43µA Supply Current
Best-in-Class
Line and Load Transient
V
IN
≥ V
OUT
Operation
Low-Ripple Light-Load PFM Mode
True Load Disconnect During Shutdown
Thermal Shutdown and Overload Protection
Sub 1-mm Profile Solution
Total Solution Size <9mm
2
9-Pin MicroSiP Packaging
2
Applications
Cell Phones, Smart-Phones, Tablet PCs
Mono and Stereo APA Applications
USB-OTG, HDMI Applications
USB Charging Port (5V)
