LTC2942IDCB#TRMPBF datasheet by Linear Technology

LTC2942IDCB#TRMPBF Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the LTC2942?
  A good PCB layout for the LTC2942 involves keeping the high-current paths short and wide, using multiple vias to connect the GND pins to a solid ground plane, and placing the input capacitors close to the VIN pin.
• How do I choose the right sense resistor value for my application?
  The sense resistor value depends on the maximum current you expect in your application. A good starting point is to choose a value that sets the sense voltage to around 50mV at the maximum current. You can use the formula Rsense = 0.05V / Imax to estimate the value.
• What is the purpose of the EN pin, and how do I use it?
  The EN pin is an active-high enable input that allows you to turn the device on and off. You can connect it to a logic signal or a switch to control the power path. When EN is high, the device is enabled, and when EN is low, the device is disabled and draws minimal quiescent current.
• How do I interpret the fault flags on the FLT pin?
  The FLT pin is an open-drain output that indicates a fault condition. A logic low on FLT indicates an overcurrent, overvoltage, or undervoltage fault. You can use an external pull-up resistor to connect FLT to a microcontroller or other monitoring circuitry.
• What is the maximum operating temperature range for the LTC2942?
  The LTC2942 is rated for operation from -40°C to 125°C. However, the device may not meet all specifications across the full temperature range. Be sure to check the datasheet for specific temperature-related limitations.