The recommended input capacitor value is 1uF to 10uF, depending on the input voltage and output current requirements. A larger capacitor value can help to reduce input ripple and improve output stability.
To ensure stability, make sure to follow the recommended PCB layout guidelines, use a sufficient output capacitor value, and avoid using long wires or traces that can cause parasitic inductance. Additionally, adding a small ceramic capacitor (e.g., 100nF) between the output and ground can help to improve stability.
The maximum output current of the UA7905CKC is 1A, but it can be limited by the input voltage, output voltage, and thermal considerations. It's recommended to derate the output current based on the specific application requirements and thermal constraints.
The UA7905CKC is rated for operation up to 125°C, but its performance and reliability may be affected at high temperatures. It's recommended to derate the output current and ensure proper thermal management to prevent overheating and ensure reliable operation.
To protect the UA7905CKC from input voltage surges or spikes, consider adding a transient voltage suppressor (TVS) diode or a voltage clamp circuit at the input. This can help to limit the input voltage to within the recommended range and prevent damage to the device.
uA7905CKC datasheet
by Texas Instruments
