TPS2557DRB datasheet by Texas Instruments

TPS2557DRB Frequently Asked Questions (FAQs)

• What is the maximum current that can be sunk by the TPS2557DRB?
  The TPS2557DRB can sink up to 100mA of current, but it's recommended to limit it to 50mA for reliable operation.
• How do I ensure the TPS2557DRB turns off completely when the input voltage is removed?
  To ensure the TPS2557DRB turns off completely, add a 100nF capacitor between the EN pin and GND, and a 1kΩ resistor between the EN pin and VIN.
• What is the purpose of the EN pin, and how do I use it?
  The EN (enable) pin is used to turn the TPS2557DRB on or off. Connect it to VIN to enable the device, or to GND to disable it. You can also use a logic signal to control the EN pin.
• Can I use the TPS2557DRB as a high-side switch?
  No, the TPS2557DRB is a low-side switch, meaning it can only switch the ground connection of a load. It's not suitable for high-side switching applications.
• How do I calculate the power dissipation of the TPS2557DRB?
  The power dissipation of the TPS2557DRB can be calculated using the formula: Pd = (VIN - VOUT) x IOUT x Rds(on), where Rds(on) is the on-state resistance of the internal FET.