A good PCB layout for the LTC695ISW-3.3 involves keeping the input and output traces short and wide, using a solid ground plane, and placing the device close to the power supply bypass capacitors. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
To ensure stability, make sure to follow the recommended PCB layout, use a sufficient output capacitor (at least 10uF), and add a 1-2ohm resistor in series with the output capacitor to prevent oscillation. Also, ensure that the input voltage is within the recommended range and the device is operated within its specified temperature range.
The maximum input voltage that can be applied to the LTC695ISW-3.3 is 15V. Exceeding this voltage may damage the device. It's recommended to use a voltage regulator or a voltage limiter to ensure the input voltage remains within the specified range.
The LTC695ISW-3.3 is rated for operation up to 125°C. However, the device's performance and reliability may degrade at high temperatures. It's recommended to derate the device's output current and voltage at high temperatures to ensure reliable operation.
The output voltage of the LTC695ISW-3.3 can be calculated using the formula: Vout = (R1/R2) * (Vin - Vref), where R1 and R2 are the resistors in the feedback network, Vin is the input voltage, and Vref is the internal reference voltage (typically 1.25V).
LTC695ISW-3.3#PBF datasheet
by Linear Technology
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