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TPS51116 Complete DDR, DDR2, DDR3, DDR3L, LPDDR3 and DDR4 Power Solution Synchronous Buck Controller, 3-A LDO, Buffered Reference
SLUS609J
May 2004 – January 2018
TPS51116
PRODUCTION DATA.
CONTENTS
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TPS51116 Complete DDR, DDR2, DDR3, DDR3L, LPDDR3 and DDR4 Power Solution Synchronous Buck Controller, 3-A LDO, Buffered Reference
1
Features
2
Applications
3
Description
Device Images
3.1
Typical Application
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
Dissipation Ratings
6.5
Thermal Information
6.6
Electrical Characteristics
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
VDDQ SMPS, Light Load Condition
7.3.2
Low-Side Driver
7.3.3
High-Side Driver
7.3.4
Current Sensing Scheme
7.3.5
PWM Frequency and Adaptive On-Time Control
7.3.6
VDDQ Output Voltage Selection
7.3.7
VTT Linear Regulator and VTTREF
7.3.8
Controling Outputs Using the S3 and S5 Pins
7.3.9
Soft-Start Function and Powergood Status
7.3.10
VDDQ and VTT Discharge Control
7.3.11
Current Protection for VDDQ
7.3.12
Current Protection for VTT
7.3.13
Overvoltage and Undervoltage Protection for VDDQ
7.3.14
Undervoltage Lockout (UVLO) Protection, V5IN (PWP), V5FILT (RGE)
7.3.15
Input Capacitor, V5IN (PWP), V5FILT (RGE)
7.3.16
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
VDDQ SMPS, Dual PWM Operation Modes
7.4.2
Current Mode Operation
7.4.3
D-CAP™ Mode Operation
8
Application and Implementation
8.1
Application Information
8.2
DDR3 Application With Current Mode
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Pin Connections
8.2.2.2
Choose the inductor
8.2.2.3
Choose rectifying (low-side) MOSFET
8.2.2.4
Choose output capacitance
8.2.2.5
Determine f0 and calculate RC
8.2.2.6
Calculate CC2
8.2.2.7
Calculate CC.
8.2.2.8
Determine the value of R1 and R2.
8.2.3
Application Curves
8.3
DDR3 Application With D−CAP™ Mode
8.3.1
Design Requirements
8.3.2
Detailed Design Procedure
8.3.2.1
Pin Connections
8.3.2.2
Choose the Components
8.3.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Receiving Notification of Documentation Updates
11.2
Community Resources
11.3
Trademarks
11.4
Electrostatic Discharge Caution
11.5
Glossary
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
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