The recommended PCB layout for optimal performance involves keeping the analog and digital grounds separate, using a solid ground plane, and placing the decoupling capacitors close to the device. Additionally, it is recommended to use a low-ESR capacitor for the output filter and to minimize the loop area of the inductor to reduce EMI.
To select the right inductor for the LTC1726, consider the following factors: inductance value, DC resistance, saturation current, and core material. A good starting point is to use an inductor with an inductance value between 1uH to 10uH, a DC resistance of less than 100mΩ, and a saturation current of at least 2A. Ferrite or iron powder cores are suitable for most applications.
The maximum input voltage that can be applied to the LTC1726 is 6V. Exceeding this voltage can cause damage to the device. It is recommended to use a voltage regulator or a voltage limiter to ensure that the input voltage does not exceed the maximum rating.
The output voltage of the LTC1726 can be adjusted by using a resistive divider network between the output pin and the ground pin. The resistors should be chosen such that the output voltage is set to the desired value. The datasheet provides a formula to calculate the required resistor values.
The thermal shutdown temperature of the LTC1726 is typically around 150°C. When the device temperature exceeds this value, it will shut down to prevent damage. The device will automatically restart when the temperature drops below 130°C.
LTC1726EMS8-5#TRPBF datasheet
by Linear Technology
