SLVSAN2D November 2010  – August 2016 TPS54328

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1Absolute Maximum Ratings
    2. 6.2ESD Ratings
    3. 6.3Recommended Operating Conditions
    4. 6.4Thermal Information
    5. 6.5Electrical Characteristics
    6. 6.6Typical Characteristics
  7. Detailed Description
    1. 7.1Overview
    2. 7.2Functional Block Diagram
    3. 7.3Feature Description
      1. 7.3.1PWM Operation
      2. 7.3.2PWM Frequency and Adaptive On-Time Control
      3. 7.3.3Auto-Skip Eco-Mode Control
      4. 7.3.4Soft Start and Pre-Biased Soft Start
      5. 7.3.5Current Protection
      6. 7.3.6UVLO Protection
      7. 7.3.7Thermal Shutdown
    4. 7.4Device Functional Modes
      1. 7.4.1Normal Operation
      2. 7.4.2Standby Operation
  8. Application and Implementation
    1. 8.1Application Information
    2. 8.2Typical Application
      1. 8.2.1Design Requirements
      2. 8.2.2Detailed Design Procedure
        1. 8.2.2.1Output Voltage Resistors Selection
        2. 8.2.2.2Output Filter Selection
        3. 8.2.2.3Input Capacitor Selection
        4. 8.2.2.4Bootstrap Capacitor Selection
        5. 8.2.2.5VREG5 Capacitor Selection
      3. 8.2.3Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1Layout Guidelines
    2. 10.2Layout Example
    3. 10.3Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1Device Support
      1. 11.1.1Development Support
    2. 11.2Documentation Support
      1. 11.2.1Related Documentation
    3. 11.3Receiving Notification of Documentation Updates
    4. 11.4Community Resources
    5. 11.5Trademarks
    6. 11.6Electrostatic Discharge Caution
    7. 11.7Glossary
  12. 12Mechanical, Packaging, and Orderable Information

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机械数据 (封装 | 引脚)
订购信息

1 Features

  • D-CAP2™ Mode Enables Fast Transient Response
  • Low Output Ripple and Allows Ceramic Output Capacitor
  • Wide Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.76 V to 7 V
  • Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications
    • 100 mΩ (High-Side) and 70 mΩ (Low-Side)
  • High Efficiency, Less Than 10 µA at Shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle-By-Cycle Overcurrent Limit
  • Auto-Skip Eco-Mode™ for High Efficiency at Light Load

2 Applications

  • Wide Range of Applications for Low Voltage Systems
    • Digital TV Power Supplies
    • High Definition Blu-ray Disc™ Players
    • Networking Home Terminals
    • Digital Set Top Boxes (STB)

3 Description

The TPS54328 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54328 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 main control loop for the TPS54328 uses the D-CAP2 mode control that provides a fast transient response with no external compensation components.

The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode operation at light loads. Eco-mode allows the TPS54328 to maintain high efficiency during lighter load conditions. The TPS54328 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V input (VIN).

The output voltage can be programmed from 0.76 V to 7 V. The device also features an adjustable soft start time. The TPS54328 is available in 8-pin DDA and 10-pin DRC packages, and is designed to operate over the ambient temperature range of –40°C to 85°C.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
TPS54328HSOP (8)4.89 mm × 3.90 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

TPS54328 FP_DS_slvsAN2.gif

TPS54320 Transient Response

TPS54328 fig_6.gif