Texas Instruments provides a recommended PCB layout for the LM20145QMHE/NOPB in the datasheet, which includes a thermal pad connected to a copper plane on the PCB to dissipate heat. Additionally, it is recommended to use a 2-ounce copper PCB and to keep the thermal pad away from other components to minimize thermal resistance.
To ensure the output voltage is stable and accurate, it is recommended to use a high-quality output capacitor with a low equivalent series resistance (ESR) and a high ripple current rating. Additionally, the input voltage should be well-regulated and the input capacitor should be placed close to the device to minimize noise and ripple.
The maximum input voltage that can be applied to the LM20145QMHE/NOPB is 42V, but it is recommended to operate the device within the specified input voltage range of 3.5V to 36V to ensure reliable operation and to prevent damage to the device.
The LM20145QMHE/NOPB has built-in overcurrent protection and short-circuit protection, but it is still recommended to add external protection components such as fuses or current-limiting resistors to prevent damage to the device and the PCB in case of a fault condition.
The recommended operating temperature range for the LM20145QMHE/NOPB is -40°C to 125°C, but the device can operate up to 150°C with derating. It is recommended to operate the device within the specified temperature range to ensure reliable operation and to prevent damage to the device.
LM20145QMHE/NOPB datasheet
by Texas Instruments
