The MAX809MEUR is a sensitive device and requires careful layout and placement to ensure optimal performance. It is recommended to place the device close to the power source, use a solid ground plane, and keep the input and output traces short and separate to minimize noise and EMI. Additionally, it is recommended to use a bypass capacitor between the VIN and GND pins to filter out high-frequency noise.
The MAX809MEUR has a specific power-up sequence requirement to ensure proper operation. It is recommended to power up the device in the following sequence: VIN, then EN, and finally the output load. This sequence ensures that the internal voltage regulator is fully powered up before the output is enabled.
The MAX809MEUR has an absolute maximum input voltage rating of 6.5V. Exceeding this voltage can cause permanent damage to the device. It is recommended to ensure that the input voltage is within the recommended operating range of 2.7V to 5.5V to ensure reliable operation.
The output voltage of the MAX809MEUR is fixed at 3.3V. However, the output voltage can be adjusted by using an external resistor divider network between the OUT and ADJ pins. The output voltage can be calculated using the formula: VOUT = 3.3V x (1 + R1/R2), where R1 and R2 are the resistors in the divider network.
The quiescent current of the MAX809MEUR is typically around 10μA when the device is enabled and the output is not loaded. However, the quiescent current can increase to around 50μA when the device is in shutdown mode (EN pin low).
MAX809MEUR datasheet
by Maxim Integrated Products
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