Page 6 of 7

5D14N-Rev.F004

EC3121

300mA 2CH Low Dropout Voltage

Linear Regulators

Output Capacitor

The EC3121 is designed specifically to work with very small ceramic output capacitors. A ceramic capacitor

(temperature characteristics X7R, X5R) in 1µF is suitable for the EC3121 application.The recommended minimum

be increased without limit. Higher capacitance values help to improve transient. The output capacitor's ESR is

critical because it forms a zero to provide phase lead which is required for loop stability.

Thermal Considerations

The EC3121 series can provide a current of up to 300mA/channel over the full operating junction

temperature range. However, the maximum output current must be debated at higher ambient temperature to

ensure the junction temperature does not exceed 125°C. With all possible conditions, the junction temperature

must be within the range specified under operating conditions. Power dissipation can be calculated based on

the output current and the voltage drop across regulator.