SLUSAE1F December   2010  – December 2018 TPS51916

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Simplified Application
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  VDDQ Switch Mode Power Supply Control
      2. 7.3.2  VREF and REFIN, VDDQ Output Voltage
      3. 7.3.3  Soft-Start and Powergood
      4. 7.3.4  Power State Control
      5. 7.3.5  Discharge Control
      6. 7.3.6  VTT and VTTREF
      7. 7.3.7  VDDQ Overvoltage and Undervoltage Protection
      8. 7.3.8  VDDQ Out-of-Bound Operation
      9. 7.3.9  VDDQ Overcurrent Protection
      10. 7.3.10 VTT Overcurrent Protection
      11. 7.3.11 V5IN Undervoltage Lockout Protection
      12. 7.3.12 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 MODE Pin Configuration
      2. 7.4.2 D-CAP™ Mode
    5. 7.5 D-CAP2™ Mode Operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 DDR3, D-CAP™ 400-kHz Application with Tracking Discharge
        1. 8.1.1.1 Design Requirements
        2. 8.1.1.2 Detailed Design Procedure
          1. 8.1.1.2.1 1. Determine the value of R1 AND R2
          2. 8.1.1.2.2 2. Choose the inductor
          3. 8.1.1.2.3 3. Choose the OCL setting resistance, RTRIP
          4. 8.1.1.2.4 Choose the output capacitors
        3. 8.1.1.3 Application Curves
      2. 8.1.2 DDR3, DCAP-2 500-kHz Application, with Tracking Discharge
        1. 8.1.2.1 Design Requirements
        2. 8.1.2.2 Detailed Design Procedure
          1. 8.1.2.2.1 Select Mode and Switching Frequency
          2. 8.1.2.2.2 Determine output capacitance
        3. 8.1.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3.4 Power State Control

The TPS51916 device has two input pins, S3 and S5, to provide simple control scheme of power state. All of VDDQ, VTTREF and VTT are turned on at S0 state (S3=S5=high). In S3 state (S3=low, S5=high), VDDQ and VTTREF voltages are kept on while VTT is turned off and left at high impedance state (high-Z). The VTT output floats and does not sink or source current in this state. In S4/S5 states (S3=S5=low), all of the three outputs are turned off and discharged to GND according to the discharge mode selected by MODE pin. Each state code represents as follow; S0 = full ON, S3 = suspend to RAM (STR), S4 = suspend to disk (STD), S5 = soft OFF. (See Table 1)

Table 1. S3 or S5 Power State Control

STATE S3 S5 VREF VDDQ VTTREF VTT
S0 HI HI ON ON ON ON
S3 LO HI ON ON ON OFF(High-Z)
S4/S5 LO LO OFF OFF(Discharge) OFF(Discharge) OFF(Discharge)