SLVUAW5A October   2016  – June 2021 TPS568215

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Before You Begin
    2. 1.2 Background
    3. 1.3 Performance Specification Summary
    4. 1.4 Modifications
      1. 1.4.1 Output Voltage Setpoint
      2. 1.4.2 Adjustable UVLO
  3. 2Test Setup and Results
    1. 2.1  Input/Output Connections
    2. 2.2  Efficiency
    3. 2.3  Output Voltage Load Regulation
    4. 2.4  Output Voltage Line Regulation
    5. 2.5  Load Transients
    6. 2.6  Loop Characteristics
    7. 2.7  Output Voltage Ripple
    8. 2.8  Input Voltage Ripple
    9. 2.9  Powering Up
    10. 2.10 Powering Down
    11. 2.11 Thermal Image
  4. 3Board Layout
    1. 3.1 Layout
  5. 4Schematic and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Bill of Materials
  6. 5Revision History

Background

The TPS568215 dc/dc converter is a synchronous buck converter designed to provide up to a 8-A output. The input (VIN) is rated for 4.5 V to 17 V. The TPS568215 uses a proprietary DCAP3 Control mode and a MODE pin is used to select output current limit, switching frequency, and Forced Continuous Conduction Mode (FCCM)/Discontinuous Conduction Mode (DCM) operation. Rated input voltage and output current range for the evaluation module are given in Table 1-1. This evaluation module is designed to demonstrate the small printed-circuit-board areas that may be achieved when designing with the TPS568215 regulator. The MODE pin is configured for 1.2-MHz switching frequency, 8-A and DCM operation. The high-side and low-side MOSFETs are incorporated inside the TPS568215 package along with the gate-drive circuitry. The low drain-to-source on-resistance of the MOSFET allows the TPS568215 to achieve high efficiencies and helps keep the junction temperature low at high output currents. An external divider allows for an adjustable output voltage. Additionally, the TPS568215 provides adjustable slow start and undervoltage lockout inputs and a power good output.

Table 1-1 Input Voltage and Output Current Summary
EVMInput Voltage RangeOutput Current Range
TPS568215EVM-762VIN = 4.5 V to 17 V0 A to 8 A