SBVS067U January   2006  – September 2024 TPS737

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Thermal Information
    6. 5.6 Electrical Characteristics
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagrams
    3. 6.3 Feature Description
      1. 6.3.1 Output Noise
      2. 6.3.2 Internal Current Limit
      3. 6.3.3 Enable Pin and Shutdown
      4. 6.3.4 Reverse Current
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Input and Output Capacitor Requirements
        2. 7.2.2.2 Dropout Voltage
        3. 7.2.2.3 Transient Response
      3. 7.2.3 Application Curves
    3. 7.3 Best Design Practices
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
        1. 7.5.1.1 Power Dissipation
        2. 7.5.1.2 Thermal Protection
        3. 7.5.1.3 Estimating Junction Temperature
      2. 7.5.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 Evaluation Modules
        2. 8.1.1.2 Spice Models
      2. 8.1.2 Device Nomenclature
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

5.5 Thermal Information

THERMAL METRIC(1) TPS737 Legacy silicon(2) UNIT
DRB (VSON) DCQ (SOT-223) DRV (WSON)(3)
8 PINS 6 PINS 5 PINS
RθJA Junction-to-ambient thermal resistance(4) 49.5 53.1 67.2 °C/W
RθJC(top) Junction-to-case (top) thermal resistance(5) 58.9 35.2 87.6 °C/W
RθJB Junction-to-board thermal resistance(6) 25.1 7.8 36.8 °C/W
ψJT Junction-to-top characterization parameter(7) 1.7 2.9 1.8 °C/W
ψJB Junction-to-board characterization parameter(8) 25.2 7.7 37.2 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance(9) 8.6 N/A 7.7 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application note.
(2) Thermal data for the DRB, DCQ, and DRV packages are derived by thermal simulations based on JEDEC-standard methodology as specified in the JESD51 series. The following assumptions are used in the simulations:
(a) i. DRB: The exposed pad is connected to the PCB ground layer through a 2x2 thermal via array.
 ii. DCQ: The exposed pad is connected to the PCB ground layer through a 3x2 thermal via array.
 iii. DRV: The exposed pad is connected to the PCB ground layer through a 2x2 thermal via array. Due to size limitation of thermal pad, 0.8mm pitch array is used which is off the JEDEC standard.
(b) The top copper layer has a detailed copper trace pattern. The bottom copper layer is assumed to have a 20% thermal conductivity of copper, representing a 20% copper coverage.
(c) These data were generated with only a single device at the center of a JEDEC high-K (2s2p) board with 3inch × 3inch copper area. To understand the effects of the copper area on thermal performance, see the Power Dissipation and Estimating Junction Temperature sections of this data sheet.
(3) Power dissipation can limit operating range.
(4) The junction-to-ambient thermal resistance under natural convection is obtained in a simulation on a JEDEC-standard, high-K board, as specified in JESD51-7, in an environment described in JESD51-2a.
(5) The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the top of the package. No specific JEDEC-standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
(6) The junction-to-board thermal resistance is obtained by simulating in an environment with a ring cold plate fixture to control the PCB temperature, as described in JESD51-8.
(7) The junction-to-top characterization parameter, ψJT, estimates the junction temperature of a device in a real system and is extracted from the simulation data to obtain RθJA using a procedure described in JESD51-2a (sections 6 and 7).
(8) The junction-to-board characterization parameter, ψJB, estimates the junction temperature of a device in a real system and is extracted from the simulation data to obtain RθJA using a procedure described in JESD51-2a (sections 6 and 7).
(9) The junction-to-case (bottom) thermal resistance is obtained by simulating a cold plate test on the exposed (power) pad. No specific JEDEC standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.