SLVSAF7C
September 2010 – April 2019
TPS61251
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Device Images
Simplified Schematic
4
Revision History
5
Description (Continued)
6
Device Options
7
Pin Configuration and Functions
Pin 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
8.6
Typical Characteristics
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Current Limit Operation
9.3.2
Soft Start
9.3.3
Enable
9.3.4
Undervoltage Lockout (UVLO)
9.3.5
Power Good
9.3.6
Input Overvoltage Protection
9.3.7
Load Disconnect and Reverse Current Protection
9.3.8
Thermal Regulation
9.3.9
Thermal Shutdown
9.4
Device Functional Modes
9.4.1
Power-Save Mode
9.4.2
Snooze Mode
9.4.3
100% Duty-Cycle Mode
10
Application and Implementation
10.1
Application Information
10.2
Typical Application
10.2.1
Design Requirements
10.2.2
Detailed Design Procedure
10.2.2.1
Custom Design With WEBENCH® Tools
10.2.2.2
Output Voltage Setting
10.2.2.3
Average Input Current Limit
10.2.2.4
Maximum Output Current
10.2.2.5
Inductor Selection
10.2.2.6
Output Capacitor
10.2.2.7
Input Capacitor
10.2.2.8
Checking Loop Stability
10.2.3
Application Curves
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
12.3
Thermal Consideration
13
Device and Documentation Support
13.1
Device Support
13.1.1
Third-Party Products Disclaimer
13.2
Development Support
13.2.1
Custom Design With WEBENCH® Tools
13.3
Receiving Notification of Documentation Updates
13.4
Community Resource
13.5
Trademarks
13.6
Electrostatic Discharge Caution
13.7
Glossary
14
Mechanical, Packaging, and Orderable Information
6
Device Options
OUTPUT VOLTAGE
(1)
PART NUMBER
(2)
Adjustable
TPS61251
(1)
Contact TI for other fixed output voltage options
(2)
For detailed ordering information check the
Mechanical, Packaging, and Orderable Information
section at the end of this data sheet.