A good PCB layout for the LT1128CN8 involves keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing the length of the input and output traces. Additionally, it's recommended to use a separate analog ground plane and to keep the power supply traces away from the analog signals.
To ensure stability, make sure to follow the recommended component values and PCB layout guidelines. Also, ensure that the output capacitor has a low ESR (Equivalent Series Resistance) and is properly sized for the output current. Additionally, avoid using capacitors with high ESL (Equivalent Series Inductance) as they can cause oscillations.
The LT1128CN8 can operate in ambient temperatures up to 70°C, but it's recommended to derate the output current and voltage according to the thermal characteristics specified in the datasheet to ensure reliable operation.
Yes, the LT1128CN8 can be used in a switching regulator design, but it's not recommended as it's a linear regulator and not optimized for switching regulator applications. Linear Technology offers other devices specifically designed for switching regulator applications, such as the LT1074 or LT3430.
The power dissipation of the LT1128CN8 can be calculated using the formula: Pd = (Vin - Vout) x Iout, where Vin is the input voltage, Vout is the output voltage, and Iout is the output current. Make sure to consider the thermal characteristics of the device and the PCB layout to ensure reliable operation.
LT1128CN8#PBF datasheet
by Linear Technology
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