SLVSD05H March   2016  – June 2025 TPS56C215

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  PWM Operation and D-CAP3™ Control Mode
      2. 6.3.2  Eco-mode Control
      3. 6.3.3  4.7-V LDO
      4. 6.3.4  MODE Selection
      5. 6.3.5  Soft Start and Prebiased Soft Start
      6. 6.3.6  Enable and Adjustable UVLO
      7. 6.3.7  Power Good
      8. 6.3.8  Overcurrent Protection and Undervoltage Protection
      9. 6.3.9  Transient Response Enhancement
      10. 6.3.10 UVLO Protection
      11. 6.3.11 Thermal Shutdown
      12. 6.3.12 Output Voltage Discharge
    4. 6.4 Device Functional Modes
      1. 6.4.1 Light Load Operation
      2. 6.4.2 Standby Operation
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Custom Design With WEBENCH® Tools
        2. 7.2.2.2 External Component Selection
          1. 7.2.2.2.1 Output Voltage Set Point
          2. 7.2.2.2.2 Switching Frequency and MODE Selection
          3. 7.2.2.2.3 Inductor Selection
          4. 7.2.2.2.4 Output Capacitor Selection
          5. 7.2.2.2.5 Input Capacitor Selection
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Third-Party Products Disclaimer
      2. 8.1.2 Development Support
        1. 8.1.2.1 Custom Design With WEBENCH® Tools
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information
    1. 10.1 Package Marking

Package Options

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

6.3.6 Enable and Adjustable UVLO

The EN pin controls the turn-on and turnoff of the device. When EN pin voltage is above the turn-on threshold which is around 1.2 V, the device starts switching, and when the EN pin voltage falls below the turn-off threshold, which is around 1.1 V, the device stops switching. If the user application requires a different turn-on (VSTART) and turnoff thresholds (VSTOP) respectively, the EN pin can be configured as shown in Figure 6-3 by connecting a resistor divider between VIN and EN. The EN pin has a pullup current Ip1 that sets the default state of the pin when floating. This current increases to Ip2 when the EN pin voltage crosses the turn-on threshold. The UVLO thresholds can be set by using Equation 4 and Equation 5.

TPS56C215 Adjustable VIN Undervoltage LockoutFigure 6-3 Adjustable VIN Undervoltage Lockout
Equation 4. TPS56C215
Equation 5. TPS56C215

where

  • Ip2 = 4.197 μA
  • Ip1 = 1.91 μA
  • Ih = 2.287 μA
  • VENRISING = 1.225 V
  • VENFALLING = 1.104 V