SLVSCT3
March 2015
TPS51275B-1
PRODUCTION DATA.
1
Features
2
Applications
3
Description
4
Typical Application Diagram
5
Revision History
6
Pin Configuration and 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
Timing Requirements
7.7
Switching Characteristics
7.8
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
PWM Operations
8.3.2
Adaptive On-Time and PWM Frequency Control
8.3.3
Light-Load Condition in Out-of-Audio Operation
8.3.4
Enable and Power Good
8.3.5
Soft-Start and Discharge
8.3.6
VREG5 and VREG3 Linear Regulators
8.3.7
VCLK for Charge Pump
8.3.8
Overcurrent Protection
8.3.9
Output Overvoltage and Undervoltage Protection
8.3.10
Undervoltage Lockout Protection
8.3.11
Over-Temperature Protection (OTP)
8.4
Device Functional Modes
8.4.1
D-CAP Mode
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
External Components Selection
9.2.2.1.1
Step 1. Determine the Value of R1 and R2
9.2.2.1.2
Step 2. Select the Inductor
9.2.2.1.3
Step 3. Select Output Capacitors
9.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.1.1
Placement
11.1.2
Routing (Sensitive Analog Portion)
11.1.3
Routing (Power portion)
11.2
Layout Example
12
Device and Documentation Support
12.1
Device Support
12.1.1
Third-Party Products Disclaimer
12.2
Trademarks
12.3
Electrostatic Discharge Caution
12.4
Glossary
13
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RUK|20
MPQF220D
Thermal pad, mechanical data (Package|Pins)
RUK|20
QFND191D
Orderable Information
slvsct3_oa
slvsct3_pm
5 Revision History
DATE
REVISION
NOTES
March 2015
*
Initial release.