SLVSA31A
November 2009 – December 2014
TPS61029-Q1
PRODUCTION DATA.
1
Features
2
Applications
3
Description
4
Simplified Schematic
5
Revision History
6
Device Comparison Table
7
Pin Configuration and Functions
8
Specifications
8.1
Absolute Maximum Ratings
8.2
ESD Ratings
8.3
Recommended Operating Conditions
8.4
Thermal Information
8.5
Electrical Characteristics
9
Typical Characteristics
10
Parameter Measurement Information
11
Detailed Description
11.1
Functional Block Diagram (TPS61029)
11.2
Feature Description
11.2.1
Controller Circuit
11.2.1.1
Synchronous Rectifier
11.2.1.2
Down Regulation
11.2.1.3
Device Enable
11.2.1.4
Softstart and Short Circuit Protection
11.2.1.5
Low Battery Detector Circuit—LBI/LBO
11.2.1.6
Low-EMI Switch
11.3
Device Functional Modes
11.3.1
Undervoltage Lockout
11.3.2
Power Save Mode
11.4
Programming
11.4.1
Programming the Output Voltage
11.4.2
Programming the LBI/LBO Threshold Voltage
12
Application and Implementation
12.1
Application Information
12.1.1
Application Examples
12.2
Typical Application
12.2.1
Design Requirements
12.2.1.1
Inductor Selection
12.2.1.2
Input Capacitor
12.2.1.3
Output Capacitor
12.2.2
Detailed Design Procedure
12.2.2.1
Small Signal Stability
12.2.2.2
Thermal Information
12.2.3
Application Curves
13
Power Supply Recommendations
14
Layout
14.1
Layout Guidelines
14.2
Layout Example
15
Device and Documentation Support
15.1
Documentation Support
15.1.1
Third-Party Products Disclaimer
15.2
Related Links
15.3
Trademarks
15.4
Electrostatic Discharge Caution
15.5
Glossary
16
Mechanical, Packaging, and Orderable Information
6 Device Comparison Table
PART NUMBER
(1)
OUTPUT VOLTAGE (DC/DC)
NOMINAL SWITCH CURRENT LIMIT
TPS61029-Q1
Adjustable
1800 mA
TPS61025-Q1
(2)
3.3 V
1500 mA
TPS61027-Q1
(2)
5 V
1500 mA
(1) For all available packages, see the orderable addendum at the end of the datasheet
(2) Product preview. Contact TI factory for more information