The recommended input capacitor value is 1uF to 10uF, depending on the input voltage and output current requirements. A larger capacitor value can help reduce input ripple and improve output stability.
To ensure the 78ST305VC operates within its SOA, ensure the input voltage is within the recommended range (7.5V to 18V), output current is within the maximum rating (5A), and the junction temperature is below the maximum rating (150°C). Also, ensure proper heat sinking and thermal management.
The minimum input voltage required for the 78ST305VC to maintain regulation is typically around 7.5V, but this can vary depending on the output voltage and current. It's recommended to check the datasheet or consult with TI support for specific application requirements.
The 78ST305VC is rated for operation up to 150°C, but its performance and reliability may degrade at high temperatures. It's recommended to derate the output current and ensure proper heat sinking and thermal management to ensure reliable operation in high-temperature environments.
To reduce the output voltage ripple of the 78ST305VC, use a larger output capacitor (up to 100uF), add a bypass capacitor (1uF to 10uF) between the output and ground, and ensure the input voltage is well-regulated and low-noise.
78ST305VC datasheet
by Texas Instruments
