SLVSAV0B April   2011  – October 2014 TPS55010

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Rating
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Switching Characteristics
    8. 7.8 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  Fixed Frequency PWM Control
      2. 8.3.2  Half Bridge and Bootstrap Voltage
      3. 8.3.3  Error Amplifier
      4. 8.3.4  Voltage Reference
      5. 8.3.5  Adjusting the Output Voltage
      6. 8.3.6  Enable and Adjusting Undervoltage Lockout
      7. 8.3.7  Adjusting Slow Start Time
      8. 8.3.8  Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
      9. 8.3.9  How to Interface to RT/CLK Pin
      10. 8.3.10 Overcurrent Protection
      11. 8.3.11 Reverse Overcurrent Protection
      12. 8.3.12 FAULT Pin
      13. 8.3.13 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Operation of the Fly-Buck™ Converter
  9. 9 Application And Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1  Design Guide - Step-by-Step Design Procedure
      2. 9.2.2  Primary Side Voltage
      3. 9.2.3  Voltage Feedback
        1. 9.2.3.1 Turns Ratio
      4. 9.2.4  Selecting the Switching Frequency and Primary Inductance
      5. 9.2.5  Primary Side Capacitor
      6. 9.2.6  Secondary Side Diode
      7. 9.2.7  Secondary Side Capacitor
      8. 9.2.8  Input Capacitor
      9. 9.2.9  Y - Capacitor
      10. 9.2.10 Slow Start Capacitor
      11. 9.2.11 Bootstrap Capacitor Selection
      12. 9.2.12 UVLO Resistors
      13. 9.2.13 Compensation
      14. 9.2.14 Design Tips
      15. 9.2.15 How to Specify a Fly-Buck Transformer
      16. 9.2.16 Application Curves
    3. 9.3 Typical Application, Dual Output
      1. 9.3.1 Design Guide Requirements
      2. 9.3.2 Detailed Design Procedures
        1. 9.3.2.1 Primary Side Voltage for Dual Output
        2. 9.3.2.2 Turns Ratio
        3. 9.3.2.3 Voltage Feedback
        4. 9.3.2.4 Selecting the Switching Frequency and Primary Inductance
          1. 9.3.2.4.1 Primary Side Capacitor
          2. 9.3.2.4.2 Secondary Side Diode
          3. 9.3.2.4.3 Secondary Side Capacitor
          4. 9.3.2.4.4 Input Capacitor
        5. 9.3.2.5 Compensation
        6. 9.3.2.6 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

6 Pin Configuration and Functions

RTE PACKAGE
(TOP VIEW)
TPS55010 po_lvsav0.gif

Pin Functions

Name Number Description
VIN 1, 2, 16 Supplies the control circuitry and switches of the power converter.
GND 3, 4, 5 Power Ground. This pin should be electrically connected directly to the thermal pad under the IC.
VSENSE 6 Inverting node of the transconductance error amplifier.
COMP 7 Error amplifier output, and input to the output switch current comparator. Connect frequency compensation components to this pin.
RT/CLK 8 Resistor Timing and External Clock. An internal amplifier holds this pin at a fixed voltage when using an external resistor to ground to set the switching frequency. If the pin is pulled above the PLL upper threshold, a mode change occurs and the pin becomes a synchronization input. The internal amplifier is disabled and the pin is a high impedance clock input to the internal PLL. If clocking edges stop, the internal amplifier is re-enabled and the mode returns to a resistor set function.
SS 9 Slow-start. An external capacitor connected to this pin sets the output rise time.
PH 10, 11, 12 The source of the internal high side power MOSFET, and drain of the internal low side MOSFET.
BOOT 13 A bootstrap capacitor is required between BOOT and PH. If the voltage on this capacitor is below the minimum required by the output device, the output is forced to switch off until the capacitor is refreshed.
FAULT 14 An open drain output. Active low if the output voltage is low due to thermal shutdown, dropout, overvoltage or EN shut down.
EN 15 Enable pin, internal pull-up current source. Pull below 1.2V to disable. Float to enable. Adjust the input undervoltage lockout with two resistors.
THERMAL PAD 17 GND pin should be connected to the exposed thermal pad for proper operation. This thermal pad should be connected to any internal PCB ground plane using multiple vias for good thermal performance.