The UC5180CQ requires careful layout and placement to ensure proper operation. TI recommends placing the IC close to the input capacitors, using a solid ground plane, and minimizing trace lengths and widths to reduce EMI and noise. A 4-layer PCB with a dedicated power plane is also recommended.
The input capacitors should be selected based on the input voltage, current, and frequency. TI recommends using low-ESR capacitors with a minimum capacitance of 10uF and a voltage rating of at least 1.5 times the maximum input voltage. X5R or X7R ceramic capacitors are suitable options.
The UC5180CQ can deliver up to 2A of output current, but this depends on the input voltage, output voltage, and thermal conditions. It's essential to ensure the device is properly heatsinked and the output current is within the recommended operating range to avoid overheating and damage.
The UC5180CQ has a built-in overcurrent protection feature that can be enabled by connecting a resistor between the OCP pin and GND. The resistor value determines the overcurrent threshold. TI recommends using a 1kΩ resistor for a 2A overcurrent limit. Additionally, an external current sense resistor can be used to monitor the output current.
The EN (enable) pin is used to turn the UC5180CQ on and off. When the EN pin is pulled high (above 2.5V), the device is enabled, and when it's pulled low (below 0.8V), the device is disabled. This pin can be used to implement power sequencing, shutdown, or low-power modes in the system.
UC5180CQ datasheet
by Texas Instruments
