LTC1144IN8 datasheet by Linear Technology

LTC1144IN8 Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the LTC1144IN8?
  The maximum input voltage that can be applied to the LTC1144IN8 is 5.5V, which is the absolute maximum rating. However, the recommended input voltage range is 4.5V to 5.5V for optimal performance.
• How do I ensure the LTC1144IN8 is in a low-power state when not in use?
  To ensure the LTC1144IN8 is in a low-power state when not in use, pull the SHDN pin low. This will put the device in shutdown mode, reducing the quiescent current to less than 1μA.
• What is the purpose of the TRACK/SS pin on the LTC1144IN8?
  The TRACK/SS pin on the LTC1144IN8 is used to track the output voltage of the regulator. It can also be used to implement a soft-start function by connecting a capacitor from this pin to ground.
• Can I use the LTC1144IN8 in a high-temperature environment?
  The LTC1144IN8 is rated for operation up to 125°C junction temperature. However, the device's performance and reliability may degrade at high temperatures. It's recommended to derate the output current and voltage according to the datasheet's thermal derating curves.
• How do I layout the PCB to minimize noise and ensure stable operation of the LTC1144IN8?
  To minimize noise and ensure stable operation of the LTC1144IN8, follow good PCB layout practices such as keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing trace lengths and loops. Additionally, ensure that the device is decoupled from the input voltage source using a ferrite bead or inductor.