NXP provides a recommended PCB layout in the application note AN11173, which includes guidelines for thermal vias, copper pours, and component placement to ensure optimal thermal performance.
The input capacitor selection depends on the input voltage, current, and frequency. A general guideline is to choose a capacitor with a voltage rating of at least 1.5 times the maximum input voltage, and a capacitance value between 1uF to 10uF. Consult the application note AN11173 for more detailed guidance.
The maximum allowed voltage drop across the PMT21EN,135 is typically around 1.5V to 2V, depending on the specific application and operating conditions. Exceeding this voltage drop may affect the device's performance and reliability.
To ensure EMC, follow the guidelines in the application note AN11173, which includes recommendations for PCB layout, component selection, and shielding. Additionally, consider using a common-mode choke and/or a ferrite bead to filter out electromagnetic interference.
The recommended operating temperature range for the PMT21EN,135 is -40°C to +125°C. However, the device can operate up to +150°C for short periods of time. Consult the datasheet for more detailed information on temperature derating.
PMT21EN,135 datasheet
by NXP Semiconductors
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