SLUS660I September   2005  – January 2015 TPS40140

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Clock Master and Clock Slave
      2. 8.3.2 Voltage Master and Voltage Slave
      3. 8.3.3 Power Good
      4. 8.3.4 Power-On Reset (POR)
      5. 8.3.5 Overcurrent
      6. 8.3.6 Output Undervoltage Protection
      7. 8.3.7 Output Overvoltage Protection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Protection and Fault Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1  Synchronizing a Single Controller to an External Clock
      2. 9.1.2  Split Input Voltage Operation
      3. 9.1.3  Configuring Single and Multiple ICs
        1. 9.1.3.1 Single Device Operation
        2. 9.1.3.2 Multiple Devices
        3. 9.1.3.3 Clock Master, PHSEL, and CLKIO Configurations
          1. 9.1.3.3.1 One Device Operation
          2. 9.1.3.3.2 Two ICs Operation
          3. 9.1.3.3.3 Three ICs Operation
          4. 9.1.3.3.4 Four ICs Operation
          5. 9.1.3.3.5 Six ICs Operation
          6. 9.1.3.3.6 Eight ICs Operation
      4. 9.1.4  Digital Clock Synchronization
        1. 9.1.4.1 Basic Configurations for 2, 4, 6, 8, 12, or 16 Phases
        2. 9.1.4.2 Configuring for Other Number of Phases
      5. 9.1.5  Typical Start-Up Sequence
      6. 9.1.6  Track (Soft-Start Without PreBiased Output)
      7. 9.1.7  Soft-Start With PreBiased Outputs
      8. 9.1.8  Track Function in Configuring a Slave Channel
      9. 9.1.9  Differential Amplifier, U9
      10. 9.1.10 Setting the Output Voltage
      11. 9.1.11 Programmable Input UVLO Protection
      12. 9.1.12 CLKFLT, CLKIO Pin Fault
      13. 9.1.13 PHSEL Pin Fault
      14. 9.1.14 Overtemperature
      15. 9.1.15 Fault Masking Operation
      16. 9.1.16 Setting the Switching Frequency
      17. 9.1.17 Current Sense
      18. 9.1.18 Current Sensing and Balancing
      19. 9.1.19 Overcurrent Detection and Hiccup Mode
      20. 9.1.20 Calculating Overcurrent Protection Level
      21. 9.1.21 Design Examples Information
        1. 9.1.21.1 Inductor DCR Current Sense
    2. 9.2 Typical Application
      1. 9.2.1 Application 1: Dual-Output Configuration from 12 to 3.3 V and 1.5 V DC-DC Converter Using a TPS40140
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Step 1: Inductor Selection
          2. 9.2.1.2.2 Step 2: Output Capacitor Selection
          3. 9.2.1.2.3 Step 3: Input Capacitor Selection
          4. 9.2.1.2.4 Step 4: MOSFET Selection
          5. 9.2.1.2.5 Step 5: Peripheral Component Design
            1. 9.2.1.2.5.1  Switching Frequency Setting (RT Pin 5)
            2. 9.2.1.2.5.2  Output Voltage Setting (FB1 Pin 36)
            3. 9.2.1.2.5.3  Current Sensing Network Design (CS1 Pin 31 and CSRT1 Pin 32)
            4. 9.2.1.2.5.4  Overcurrent Protection (ILIM1 Pin 34)
            5. 9.2.1.2.5.5  VREG (Pin 21)
            6. 9.2.1.2.5.6  BP5 (Pin 8)
            7. 9.2.1.2.5.7  PHSEL (Pin 4)
            8. 9.2.1.2.5.8  VSHARE (Pin 6)
            9. 9.2.1.2.5.9  PGOOD1 (Pin 30)
            10. 9.2.1.2.5.10 UVLO_CE1 (Pin 29)
            11. 9.2.1.2.5.11 Clkio (Pin 28)
            12. 9.2.1.2.5.12 BOOT1 and SW1 (Pin 27 and 25)
            13. 9.2.1.2.5.13 TRK1 (Pin 33)
            14. 9.2.1.2.5.14 DIFFO, VOUT, and GSNS (Pin 1, Pin 2, and Pin 3)
          6. 9.2.1.2.6 Feedback Compensator Design (COMP1 Pin 35)
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Application 2: Two-Phase Single Output Configuration from 12 to 1.5 V DC-DC Converter Using a TPS40140
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 Step 1: Output Capacitor Selection
          2. 9.2.2.2.2 Step 2: Input Capacitor Selection
          3. 9.2.2.2.3 Step 3: Peripheral Component Design
            1. 9.2.2.2.3.1 Switching Frequency Setting (Rt Pin 5)
            2. 9.2.2.2.3.2 COMP1 and COMP2 (Pin 35 and Pin 10)
            3. 9.2.2.2.3.3 TRK1 and TRK2 (Pin 33 and Pin 12)
            4. 9.2.2.2.3.4 ILIM1 and ILIM2 (Pin 34 and Pin 11)
            5. 9.2.2.2.3.5 FB1 and FB2 (Pin 36 and Pin 9)
            6. 9.2.2.2.3.6 PHSEL (Pin 4)
            7. 9.2.2.2.3.7 PGOOD1 and PGOOD2 (Pin 30 and Pin 15)
            8. 9.2.2.2.3.8 CLKIO (Pin 28)
            9. 9.2.2.2.3.9 DIFFO, VOUT, and GSNS (Pin 1, Pin 2, and Pin 3)
      3. 9.2.3 Application Curves
    3. 9.3 System Example
      1. 9.3.1 Four-Phase Single Output Configuration from 12 to 1.8 V DC-DC Converter Using Two TPS40140
        1. 9.3.1.1 Step 1: Output Capacitor Selection
        2. 9.3.1.2 Step 2: Input Capacitor Selection
        3. 9.3.1.3 Step 3: Peripheral Component Design
          1. 9.3.1.3.1 Master Module
            1. 9.3.1.3.1.1 Rt (Pin 5)
            2. 9.3.1.3.1.2 COMP1 and COMP2 (Pin 35 and Pin 10)
            3. 9.3.1.3.1.3 TRK1 and TRK2 (Pin 33 and Pin 12)
            4. 9.3.1.3.1.4 ILIM1 and ILIM2 (Pin 34 and Pin 11)
            5. 9.3.1.3.1.5 FB1 and FB2 (Pin 36 and Pin 9)
            6. 9.3.1.3.1.6 PHSEL (Pin 4)
            7. 9.3.1.3.1.7 PGOOD1 and PGOOD2 (Pin 30 and Pin 15)
            8. 9.3.1.3.1.8 CLKIO (Pin 28)
          2. 9.3.1.3.2 Slave Module:
            1. 9.3.1.3.2.1 RT (Pin 5)
            2. 9.3.1.3.2.2 COMP1 and COMP2 (Pin 35 and Pin 10)
            3. 9.3.1.3.2.3 TRK1 and TRK2 (Pin 33 and Pin 12)
            4. 9.3.1.3.2.4 ILIM1 and ILIM2 ( Pin 34 and Pin 11)
            5. 9.3.1.3.2.5 FB1 and FB2 (Pin 36 and Pin 9)
            6. 9.3.1.3.2.6 PHSEL (Pin 4)
            7. 9.3.1.3.2.7 PGOOD1 and PGOOD2 (Pin 30 and Pin 15)
            8. 9.3.1.3.2.8 CLKIO (Pin 28)
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Power Stage
      2. 11.1.2 Device Peripheral
      3. 11.1.3 PowerPAD Layout
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • VDD from 4.5 to 15 V, With Internal 5-V Regulator
  • VOUT from 0.7 V to 5.8 V
  • Converts from 15-V Input to 0.7-V Output at
    1 MHz
  • Dual-Output or 2-Phase Interleaved Operation, Stackable to 16 Phases
  • Supports Prebiased Outputs

    • Programmable Switching Frequency up to
    1 MHz/Phase

  • 0.5% Internally Trimmed 0.7-V Reference
  • 10-μA Shutdown Current
  • Current Mode Control With Forced Current Sharing (1)
  • 1- to 40-V Power Stage Operation Range
  • Power Sharing From Different Input Voltage Rails, (for Example, Master From 5 V, Slave From 12 V)
  • True Remote Sensing Differential Amplifier
  • Programmable Input Undervoltage Lockout (UVLO)
  • Resistive or Inductor DCR Current Sensing
  • Provide a 6-Bit Digitally Controlled Output When Used With TPS40120
  • 36-Pin VQFN Package
(1) Patents Pending

2 Applications

  • Graphic Cards
  • Internet Servers
  • Networking Equipment
  • Telecommunications Equipment
  • DC Power Distributed Systems

3 Description

The TPS40140 is a multifunctional synchronous buck controller that can be configured to provide either a single-output 2-phase power supply or a power supply that supports two independent outputs. Several TPS40140 controllers can be stacked up to a 16-phase single output power supply. Alternatively, several controllers providing multiple independent outputs can be synchronized in an interleaving pattern for improved input ripple current.

The TPS40140 can convert from a 15-V input to a 0.7-V output at 1 MHz.

Each phase operates at a switching frequency of up to 1 MHz. The two phases in one device operate 180° out-of-phase. In a multiple-device stackable configuration, the phase shift of the slaves, relative to a master, is programmable.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS40140 VQFN (36) 6.00 mm × 6.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

typapp_lus660.gif