The recommended layout and placement for the LTC1753CG involves keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing the length of the traces between the IC and the capacitors. A 4-layer board with a solid ground plane is recommended. Refer to the Linear Technology application note AN42 for more details.
The output voltage ripple of the LTC1753CG can be calculated using the formula: ΔVout = (Iout * ESL) / (Cout * fsw), where Iout is the output current, ESL is the equivalent series inductance of the output capacitor, Cout is the output capacitance, and fsw is the switching frequency. The datasheet provides a graph to estimate the output voltage ripple based on the output capacitance and switching frequency.
The maximum input voltage that the LTC1753CG can handle is 15V, but it is recommended to keep the input voltage below 12V to ensure reliable operation and to prevent damage to the internal components.
The LTC1753CG is rated for operation up to 85°C, but it can be used in high-temperature environments up to 125°C with some derating. However, the maximum junction temperature should not exceed 150°C. Refer to the datasheet for more information on thermal derating and high-temperature operation.
The LTC1753CG has a SYNC pin that can be used to synchronize the switching frequency of multiple devices. Connect the SYNC pins of each device together and drive them with a single clock signal. This ensures that all devices switch at the same frequency, reducing electromagnetic interference (EMI) and improving system performance.
LTC1753CG#PBF datasheet
by Linear Technology
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