SLIS132A October   2008  – March 2015 TPS55065-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and 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 Dissipation Ratings
    6. 6.6 Electrical Characteristics
    7. 6.7 Switching Characteristics
    8. 6.8 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  Switched-Mode Input/Output Terminals (L1, L2)
      2. 7.3.2  Supply Terminal (Vdriver)
      3. 7.3.3  Internal Supply Decoupling Terminal (Vlogic)
      4. 7.3.4  Input Voltage Monitoring Terminal (AIN)
      5. 7.3.5  Input Undervoltage Alarm Terminal (AOUT)
      6. 7.3.6  Reset Delay Timer Terminal (REST)
      7. 7.3.7  Reset Terminal (RESET)
      8. 7.3.8  Main Regulator Output Terminal (VOUT)
      9. 7.3.9  Low-Power-Mode Terminal (CLP)
      10. 7.3.10 Switch-Output Terminal (5Vg)
      11. 7.3.11 5Vg-Enable Terminal (5Vg_ENABLE)
      12. 7.3.12 Slew-Rate Control Terminals (SCR0, SCR1)
      13. 7.3.13 Modulator Frequency Setting (Terminal Rmod)
      14. 7.3.14 Ground Terminal (PGND)
      15. 7.3.15 Enable Terminal (ENABLE)
      16. 7.3.16 Bootstrap Terminals (CBOOT1 and CBOOT2)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Clock Modulator
      2. 7.4.2 Buck/Boost Transitioning
      3. 7.4.3 Buck SMPS
      4. 7.4.4 Boost SMPS
      5. 7.4.5 Extension of the Input Voltage Range on V(driver)
      6. 7.4.6 Low-Power Mode
      7. 7.4.7 Temperature and Short-Circuit Protection
      8. 7.4.8 Switch Output Terminal (5Vg) Current Limitation
      9. 7.4.9 Soft Start
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Buck Mode
        2. 8.2.2.2 Boost Mode
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Inductor
      2. 10.1.2 Filter Capacitors
      3. 10.1.3 Traces and Ground Plane
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

1 Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 1B
    • Device CDM ESD Classification Level C4B
  • Switched-Mode Regulator
    • 5 V ±2%, Normal Mode
    • 5 V ±3%, Low-Power or Crossover Mode
  • Switching Frequency, 440 kHz (Typical)
  • Input Operating Range, 1.5 V to 40 V, (Vdriver)
    • 500-mA Load-Current Capability
    • 200-mA Load-Current Capability Down to 2-V Input (Vdriver)
    • 120-mA Load-Current Capability Down to
      1.5-V Input (Vdriver)
  • Enable Function
  • Low-Power Operation Mode
  • Switched 5-V Regulated Output on 5Vg With Current Limit
  • Programmable Slew Rate and Frequency Modulation for EMI Consideration
  • Reset Function With Deglitch Timer and Programmable Delay
  • Alarm Function for Undervoltage Detection and Indication
  • Thermally Enhanced Package for Efficient Heat Management

2 Applications

  • Automotive Infotainment and Cluster
  • 12-V Industrial Power Systems
  • Servers

3 Description

The TPS55065 is a switched-mode regulator with integrated switches for voltage-mode control. With the aid of external components (LC combination), the device regulates the output to 5 V ±3% for a wide input-voltage range.

The TPS55065 device offers a reset function to detect and indicate when the 5-V output rail is outside of the specified tolerance. This reset delay is programmable using an external timing capacitor on the REST terminal. Additionally, an alarm (AOUT) feature is activated when the input supply rail Vdriver is below a prescaled specified value (set by the AIN terminal).

The TPS55065 device has a frequency-modulation scheme to minimize EMI. The clock modulator permits a modulation of the switching frequency to reduce interference energy in the frequency band.

The 5-Vg output is a switched 5-V regulated output with internal current limiting to prevent assertion of RESET when powering a capacitive load on the supply line. This function is controlled by the 5Vg_ENABLE terminal. If there is a short to ground on this output (5Vg output), the output self-protects by operating in a chopping mode. This does, however, increase the output ripple voltage on VOUT during this fault condition.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS55065-Q1 HTSSOP (20) 6.50 mm x 4.40 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

TPS55065-Q1 b0130-01_lis122.gif
All component values are typical.

4 Revision History

Changes from * Revision (October 2008) to A Revision

  • Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go