SLVSDN9A December   2016  – January 2017 TPS54260-EP

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 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  Fixed Frequency PWM Control
      2. 7.3.2  Slope Compensation Output Current
      3. 7.3.3  Pulse Skip Eco-mode Control Scheme
      4. 7.3.4  Low Dropout Operation and Bootstrap Voltage (Boot)
      5. 7.3.5  Error Amplifier
      6. 7.3.6  Voltage Reference
      7. 7.3.7  Adjusting the Output Voltage
      8. 7.3.8  Enable and Adjusting Undervoltage Lockout (UVLO)
      9. 7.3.9  Slow-Start and Tracking Pin (SS/TR)
      10. 7.3.10 Overload Recovery Circuit
      11. 7.3.11 Constant Switching Frequency and Timing Resistor (RT and CLK Pin)
      12. 7.3.12 Overcurrent Protection and Frequency Shift
      13. 7.3.13 Selecting the Switching Frequency
      14. 7.3.14 How to Interface to RT/CLK Pin
      15. 7.3.15 Power Good (PWRGDPin)
      16. 7.3.16 Overvoltage Transient Protection (OVTP)
      17. 7.3.17 Thermal Shutdown
      18. 7.3.18 Small Signal Model for Loop Response
      19. 7.3.19 Simple Small-Signal Model for Peak Current Mode Control
      20. 7.3.20 Small-Signal Model for Frequency Compensation
    4. 7.4 Device Functional Modes
      1. 7.4.1 Sequencing
  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  Selecting The Switching Frequency
        2. 8.2.2.2  Output Inductor Selection (LO)
        3. 8.2.2.3  Output Capacitor
        4. 8.2.2.4  Catch Diode
        5. 8.2.2.5  Input Capacitor
        6. 8.2.2.6  Slow-Start Capacitor
        7. 8.2.2.7  Bootstrap Capacitor Selection
        8. 8.2.2.8  UVLO Set Point
        9. 8.2.2.9  Output Voltage and Feedback Resistors Selection
        10. 8.2.2.10 Compensation
        11. 8.2.2.11 Discontinuous Mode and Eco-mode Control Scheme Boundary
        12. 8.2.2.12 Power Dissipation
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Estimated Circuit Area
    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

1 Features

  • 3.5-V to 60-V Input Voltage Range
  • 200-mΩ High-Side MOSFET
  • High-Efficiency at Light Loads With a Pulse Skipping Eco-mode™ Control Scheme
  • 138-μA Operating Quiescent Current
  • 1.3-μA Shutdown Current
  • 100-kHz to 2.5-MHz Switching Frequency
  • Synchronizes to External Clock
  • Adjustable Slow-Start and Sequencing
  • UV and OV Power Good Output
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8-V Internal Voltage Reference
  • 10-Pin HVSSOP and 10-Pin 3-mm × 3-mm VSON Packages
  • Supported by WEBENCH® Software Tool
  • Supports Defense, Aerospace, and Medical Applications
    • Controlled Baseline
    • One Assembly and Test Site
    • One Fabrication Site
    • Available in Military (–55°C to 125°C) Temperature Range
    • Extended Product Life Cycle
    • Extended Product-Change Notification
    • Product Traceability

2 Applications

  • 12-V and 24-V Automotive and Industrial Systems
  • Infotainment, Cluster, and ADAS Applications

3 Description

The TPS54260-EP device is a 60-V, 2.5-A, step-down regulator with an integrated high-side MOSFET. Current mode control provides simple external compensation and flexible component selection. A low-ripple pulse skip mode reduces the no load, regulated output supply current to 138 μA. Using the enable pin, shutdown supply current is reduced to
1.3 μA when the enable pin is low.

Under voltage lockout is internally set at 2.5 V, but can be increased using the enable pin. The output voltage startup ramp is controlled by the slow-start pin that can also be configured for sequencing and tracking. An open drain power good signal indicates the output is within 94% to 107% of the nominal voltage.

A wide switching frequency range allows efficiency and external component size to be optimized. Frequency fold back and thermal shutdown protects the part during an overload condition.

The TPS54260-EP is available in 10-pin thermally-enhanced HVSSOP and 10-pin 3-mm × 3-mm VSON package.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS54260-EP HVSSOP (10) 3.00 mm × 4.90 mm
VSON (10) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.


Simplified Schematic

TPS54260-EP sim_sch_slvsdn9.gif

Efficiency vs Load Current

TPS54260-EP eff_il2_lvsa86.gif