Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general best practices for voltage regulator design, such as keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing trace lengths and widths to reduce noise and EMI.
To ensure stability, make sure to use the recommended output capacitor value and type, and follow the datasheet guidelines for input and output capacitor selection. Additionally, ensure that the input voltage is within the recommended range, and that the device is operated within its specified temperature range.
While the datasheet specifies a maximum input voltage of 20V, it's recommended to derate the input voltage to 18V or less to ensure reliable operation and prevent damage to the device.
The LM185BWG/883 is rated for operation up to 125°C, but it's essential to consider the device's power dissipation and thermal management when operating in high-temperature environments. Ensure that the device is properly heat-sinked and that the junction temperature is within the specified range.
Power dissipation 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 device's thermal resistance and junction temperature when calculating power dissipation.
LM185BWG/883 datasheet
by Texas Instruments
