SLVSCB6E November   2013  – December 2017 TPS56520 , TPS56720 , TPS56920 , TPS56C20

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (Continued)
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    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 PWM Operation
      2. 8.3.2 PWM Frequency and Adaptive On-Time Control
      3. 8.3.3 VIN and Power VIN Terminals (VIN and PVIN)
      4. 8.3.4 Auto-Skip Eco-mode™ Control
      5. 8.3.5 Soft Start and Pre-Biased Soft Start
      6. 8.3.6 Power Good
      7. 8.3.7 Overcurrent Protection
      8. 8.3.8 UVLO Protection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Operation at Light Loads
    5. 8.5 Programming
      1. 8.5.1 I2C Interface
      2. 8.5.2 I2C Protocol
      3. 8.5.3 I2C Chip Address Byte
    6. 8.6 Register Maps
      1. 8.6.1 I2C Register Address Byte
      2. 8.6.2 Output Voltage Registers
      3. 8.6.3 CheckSum Bit (VOUT Register Only)
      4. 8.6.4 Control Registers
      5. 8.6.5 Latchoff
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 TPS56520, TPS56720 and TPS56920, 5-A, 7-A, and 9-A Converter
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Output Voltage Resistors Selection
            1. 9.2.1.2.1.1 Output Filter Selection
          2. 9.2.1.2.2 Input Capacitor Selection
          3. 9.2.1.2.3 Bootstrap Capacitor Selection
          4. 9.2.1.2.4 VREG5 Capacitor Selection
      2. 9.2.2 TPS56520, TPS56720 and TPS56920 Application Performance Curves
      3. 9.2.3 TPS56C20 12-A Converter
        1. 9.2.3.1 Design Requirements
        2. 9.2.3.2 Design Procedure
        3. 9.2.3.3 TPS56C20 Application Performance 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 Development Support
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Related Links
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • PWP|24
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • D-CAP2™ Control
    • Input Voltage Range: 4.5V to 17V
    • Switching Frequency: 500kHz
    • Optimized for a 1.0µH to 2.2µH Inductor
  • ±1% Output Voltage Accuracy
  • Features via I2C Compatible Interface
    • Output Voltage (VID): 0.6V to 1.87V in 10mV
    • Auto-Skip Eco-mode™ ON/OFF (Light-load)
    • Current Limit Target: 40% to 160%
    • Enabling IC, Reading-back Power-good
    • Hiccup Mode Protection ON/OFF
  • IC Terminal Features
    • Start-up by Using External Resistors
      Output Voltage with VFB Pin: 0.6V to 1.87V
    • Adjustable Soft-start,
      Monotonic Pre-Biased Start-up
    • Power-good
    • I2C Address Programming (2bits)
  • Cycle-by-Cycle Overcurrent Limiting Control
  • Thermal Shutdown (TSD)
  • Undervoltage Lockout (UVLO)
  • TSSOP Package (PWP) with PowerPAD™

2 Applications

  • Media Processors for Consumer Applications:
    Digital TVs, Set Top Boxes (STB, DVD/Blu-ray Player, Cable/Satellite Modem)
  • SoC Processors
  • High Density Power Distribution Systems

3 Description

The TPS56X20 is a synchronous DC-DC converter IC (integrated circuit) with a voltage scaling control to power up micro-processors (MCUs) requiring core voltage (VCORE) tune-ups. After the initial power-up, the output voltage can be programmed/scaled by VID codes sent over an I2C compatible bus.

This step-down (buck) converter employs an adaptive on-time D-CAP2 mode control which provides a very fast transient response with no external components. Unlike traditional voltage-/current-mode controls, the D-CAP2 supports seamless transition between PWM mode for higher load and Eco-mode™ for light load. Eco-mode maintains high efficiency in light-load.

Device Information

PART NUMBER PACKAGE BODY SIZE
TPS56C20 HTSSOP (24) 7.80 mm × 4.40 mm
TPS56920 HTSSOP (20) 6.50 mm × 4.40 mm
TPS56720
TPS56520

Typical Application Circuit

TPS56C20 TPS56920 TPS56720 TPS56520 fp_sch_20a_slvscb6.gif