SLVSFU8C January   2022  – June 2024 TPS62843

PRODUCTION DATA  

  1.   1
  2. Features
  3. Applications
  4. Description
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. 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
  8. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Smart Enable and Shutdown (EN)
      2. 7.3.2 Soft Start
      3. 7.3.3 VSET Pin: Output Voltage Selection
      4. 7.3.4 Undervoltage Lockout (UVLO)
      5. 7.3.5 Switch Current Limit, Short-Circuit Protection
      6. 7.3.6 Thermal Shutdown
      7. 7.3.7 Output Voltage Discharge
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power Save Mode Operation
      2. 7.4.2 100% Mode Operation
  9. 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
      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
  10. Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Receiving Notification of Documentation Updates
    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

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DRL|6
  • YKA|6
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Power Save Mode Operation

The DCS-Control topology supports power save mode operation. At light loads, the device operates in PFM (pulse frequency modulation) mode that generates a single switching pulse to ramp up the inductor current and recharge the output capacitor, followed by a sleep period where most of the internal circuits are shut down to achieve the lowest operating quiescent current. During this time, the load current is supported by the output capacitor. The duration of the sleep period depends on the load current and the inductor peak current. During the sleep periods, the current consumption is reduced to typically 275nA. This low quiescent current consumption is achieved by an ultra-low power voltage reference, an integrated high impedance feedback divider network, and an optimized power save mode operation.

In PFM mode, the switching frequency varies linearly with the load current. At medium and high load conditions, the device enters automatically PWM (pulse width modulation) mode and operates in continuous conduction mode with a nominal switch frequency fsw of typically 1.5MHz. The switching frequency in PWM mode is controlled and depends on VIN and VOUT. The boundary between PWM and PFM mode is when the inductor current becomes discontinuous.

If the load current decreases, the converter seamlessly enters PFM mode to maintain high efficiency down to very light loads. Because DCS-Control supports both operation modes within one single building block, the transition from PWM to PFM mode is seamless with minimum output voltage ripple.