The maximum power dissipation of the LM6181IM-8/NOPB is 1.4W. However, this value can be affected by the operating temperature, PCB layout, and thermal management. It's essential to follow proper thermal design and layout guidelines to ensure reliable operation.
The choice of input and output capacitors depends on the specific application requirements, such as ripple current, voltage rating, and ESR. A general guideline is to use low-ESR capacitors with a voltage rating of at least 1.5 times the maximum input voltage. For the LM6181IM-8/NOPB, a 10uF to 22uF input capacitor and a 10uF to 47uF output capacitor are typical values.
To minimize noise and ensure reliable operation, it's essential to follow a good layout and placement strategy. Place the input and output capacitors close to the IC, and keep the high-current paths short and wide. Avoid routing sensitive analog signals near the switching node. Use a solid ground plane and a separate power plane for the input and output voltages.
The output voltage of the LM6181IM-8/NOPB can be adjusted by using a resistive divider network between the output pin and the feedback pin. The ratio of the resistors determines the output voltage. For example, to set the output voltage to 3.3V, you can use a 1kΩ resistor from the output pin to the feedback pin, and a 2.2kΩ resistor from the feedback pin to ground.
The minimum input voltage required for the LM6181IM-8/NOPB is 3.5V. However, the device can operate down to 3V with reduced performance and efficiency. It's recommended to use a minimum input voltage of 3.5V to ensure reliable operation and optimal performance.
LM6181IM-8/NOPB datasheet
by Texas Instruments
