SLVUCL4 December   2022 TPS22997

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
    1. 1.1 Description
    2. 1.2 Features
  4. 2Electrical Performance
  5. 3Schematic
  6. 4PCB Layout
    1. 4.1 Setup
  7. 5Operation
  8. 6Test Configurations
    1. 6.1 On-Resistance (RON) Test Setup
    2. 6.2 Rise Time Test Setup
  9. 7Bill of Materials (BOM)

5 Operation

Connect the VIN power supply to the J1 terminal. The input voltage range of the TPS22997EVM is 0.1 V to 5.5 V. Connect an acceptable bias voltage to TP5 or populate JP2 to use VIN as VBIAS. The bias voltage range of TPS22997EVM is 0.1V to 5.5 V. Note that VIN cannot be greater than VBIAS for correct operation of the device.

To adjust the slew rate of the device you can depopulate the C4 capacitor and change the capacitance. As it is currently, the CT pin has 1000pF of capacitance resulting in a slew rate described further in the TPS22997 datasheet.

External output loads can be applied to the switch by using the J2 terminal. To discharge the output rail when the device is disabled, adjust the quick output discharge on the TPS22997EVM as needed. When the ON pin is asserted high, the output of the TPS22997 is enabled.

The status of the MOSFET being fully turned on can be viewed using the power good, PG, pin. This is an open drain pin that is pulled up to Vbias and asserted high when the output is full load ready.