The recommended layout and placement for the LTC1144IN8 involves keeping the input and output traces short and away from each other, using a solid ground plane, and placing the bypass capacitors close to the device. A 4-layer board with a solid ground plane is recommended. Refer to the Linear Technology application note AN-72 for more details.
The input and output capacitors should be chosen based on the operating frequency, output voltage, and output current requirements. A general rule of thumb is to use low-ESR capacitors with a value of 10uF to 22uF for the input capacitor and 10uF to 47uF for the output capacitor. The capacitor voltage rating should be at least 1.5 times the maximum output voltage.
The maximum ambient temperature range for the LTC1144IN8 is -40°C to 85°C. However, the device can operate up to 125°C with derating. Refer to the datasheet for more information on thermal derating.
The LTC1144IN8 has a SYNC pin that can be used to synchronize the switching frequency of multiple devices. Connect the SYNC pins of all devices together and drive them with a single clock signal. This ensures that all devices switch at the same frequency, reducing EMI and noise.
The minimum input voltage required for the LTC1144IN8 to operate is 2.7V. However, the device can operate down to 2.5V with reduced performance and efficiency.
LTC1144IN8#PBF datasheet
by Linear Technology
