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  • TPS566235 4.5-V to 18-V Input, 6-A Synchronous Step-Down Converter

    • SLVSEW1B April   2019  – April 2019 TPS566235

      PRODUCTION DATA.  

  • CONTENTS
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  • TPS566235 4.5-V to 18-V Input, 6-A Synchronous Step-Down Converter
  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application
      2.      Efficiency vs Output Current Eco-mode
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin 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 PWM Operation and D-CAP3 Control
      2. 7.3.2 Power Good
      3. 7.3.3 Soft Start and Pre-Biased Soft Start
      4. 7.3.4 Over current Protection and Undervoltage Protection
      5. 7.3.5 Over Voltage Protection
      6. 7.3.6 UVLO Protection
      7. 7.3.7 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Light Load Operation
      2. 7.4.2 MODE Pin Configuration
      3. 7.4.3 Advanced Eco-Mode Control
      4. 7.4.4 Out-Of-Audio Mode
      5. 7.4.5 Force CCM Mode
      6. 7.4.6 Standby Operation
  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 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Inductor Selection
        3. 8.2.2.3 Output Capacitor Selection
        4. 8.2.2.4 Input Capacitor Selection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Development Support
        1. 11.1.2.1 Custom Design With WEBENCH® Tools
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Package Option Addendum
      1. 12.1.1 Packaging Information
      2. 12.1.2 Tape and Reel Information
  13. IMPORTANT NOTICE
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DATA SHEET

TPS566235 4.5-V to 18-V Input, 6-A Synchronous Step-Down Converter

1 Features

  • Input voltage range: 4.5 V to 18 V
  • Output voltage range: 0.6 V to 7 V
  • ±1% reference voltage at room temperature
  • Supports 6-A continuous output current
  • D-CAP3™ architecture control for fast transient response
  • Integrated 25-mΩ and 12-mΩ RDS(on) power FETs
  • 108-µA low quiescent current
  • Selectable Eco-Mode™, Out-Of-Audio™ and FCCM by MODE pin
  • Out-Of-Audio™ light-load operation with switching frequency over 25 kHz
  • Supports pre-biased start up function
  • 600-kHz switching frequency
  • Internal 1-ms soft start
  • Supports ceramic output capacitors
  • Power good indicator
  • Cycle-by-cycle valley over current protection
  • Non-latched for OC, OV, UV, OT and UVLO protections
  • 3.0-mm × 2.0-mm HotRod™ VQFN package
  • Create a Custom Design Using the TPS566235 With the WEBENCH® Power Designer

2 Applications

  • DTV and STB
  • Switcher and router
  • Server and enterprise SSD
  • Surveillance and single board computer
  • Distributed power systems

3 Description

The TPS566235 is a cost effective, high-voltage input, high efficiency synchronous Buck converter with integrated FETs. It enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution.

The TPS566235 employs the D-CAP3™ mode control that provides a fast transient response and good line/load regulation with no external compensation components. It also has a proprietary circuit that enables the device to support low equivalent series resistance (ESR) output capacitors such as specialty polymer and ultra-low ESR ceramic capacitors. The control topology supports seamless transition between CCM mode at heavy load conditions and DCM operation at light load conditions. There are three operation modes can be configured by MODE pin at light load: Eco-Mode™, Out-Of-Audio™ (OOA) and Forced Continuous Conduction Mode (FCCM). The OOA mode is a unique control feature that keeps the switching frequency above audible frequency with minimum reduction in efficiency.

The TPS566235 supports pre-biased start up and power good indicator. It provides complete protection including OVP, UVP, OCP, OTP and UVLO. The device is available in 3.0-mm x 2.0-mm HotRod™ package and the junction temperature is specified from –40°C to 125°C.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS566235 VQFN (13) 3.00 mm × 2.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Device Images

Typical Application

TPS566235 fbd-01-slvsew1.gif

Efficiency vs Output Current Eco-mode

TPS566235 D013-EfficiencyPSM.gif

 
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