SLVSGM1B July   2023  – June 2024 TPSM828301 , TPSM828302 , TPSM828303

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Options
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information RDS Package
    5. 6.5 Thermal Information VCB Package
    6. 6.6 Electrical Characteristics
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Pulse Width Modulation (PWM) Operation
      2. 7.3.2 Power Save Mode (PSM) Operation
      3. 7.3.3 Start-Up and Soft Start
      4. 7.3.4 Switch Cycle-by-Cycle Current Limit
      5. 7.3.5 Undervoltage Lockout
      6. 7.3.6 Thermal Shutdown
      7. 7.3.7 Optimized EMI Performance
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enable, Disable, and Output Discharge
      2. 7.4.2 Minimum Duty Cycle and 100% Mode Operation
      3. 7.4.3 Power Good
  9. 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 Setting The Output Voltage
        3. 8.2.2.3 Input Capacitor Selection
        4. 8.2.2.4 Output Capacitor Selection
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
        1. 8.4.2.1 Thermal Considerations
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Development Support
        1. 9.1.2.1 Custom Design With WEBENCH® Tools
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.1 Overview

The TPSM82830x is a family of low-voltage step-down modules available in 1-, 2- and 3-A versions. These devices use a DCS-Control scheme which transitions seamlessly from pulse-width modulation (PWM) at medium and high output currents to pulsed-frequency modulation (PFM) at low output currents. During PWM operation, the devices switch at 2 MHz; during PFM operation, the switching frequency varies with the load current and reduces as the load current decreases. For applications that require the lowest possible output voltage ripple or a constant switching frequency, a high logic level on the MODE pin forces the devices to use PWM under all load conditions (at the expense of lower efficiency at low output currents). An external resistor-divider sets the output voltage anywhere from 0.5 V to 4.5 V and the nominal switching frequency is 2 MHz with a controlled variation over the input voltage range.

Device variants are available that support both hiccup and latch-off protection behavior.

The TPSM82830x devices offer two significant advantages compared to previous devices in this series: Transient performance has improved significantly by usage of a fast comparator in both PFM and PWM modes, and EMI is reduced by an optimized gate driver and on-chip decoupling capacitors.

The VCB package version uses MagPack technology for even further EMI reduction. MagPack, a Texas Instruments proprietary integrated-magnetics packaging technology, delivers the highest-performance power module design. Besides EMI reduction, MagPack enhances efficiency and thermal properties of power modules. This feature enables an industry-leading power density.