A good PCB layout for the LM26001MXA/NOPB 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 4-layer PCB with a dedicated power plane and a dedicated ground plane.
To ensure the LM26001MXA/NOPB operates within its SOA during startup and shutdown, it's recommended to use a soft-start circuit to limit the inrush current, and to use a voltage supervisor to monitor the input voltage and prevent the device from operating outside its specified voltage range.
The recommended input capacitor type for the LM26001MXA/NOPB is a low-ESR ceramic capacitor with a value of 10uF to 22uF. The capacitor should be placed as close to the device as possible to minimize the effects of parasitic inductance.
The output voltage ripple of the LM26001MXA/NOPB can be calculated using the following formula: ΔVout = (Iout * ESL) / (Cout * fsw), where ΔVout is the output voltage ripple, 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 maximum ambient temperature range for the LM26001MXA/NOPB is -40°C to 125°C. However, the device's performance and reliability may be affected at temperatures above 85°C, and it's recommended to derate the device's power dissipation accordingly.
LM26001MXA/NOPB datasheet
by Texas Instruments
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