The maximum capacitance depends on the application and the desired output voltage ripple. As a general guideline, TI recommends using capacitors with a capacitance of 10uF to 22uF. However, it's essential to perform a thorough stability analysis to ensure the capacitor value meets the specific application requirements.
To ensure stability, follow the layout guidelines in the datasheet, use a low-ESR capacitor, and add a 1nF to 10nF capacitor in parallel with the output capacitor to improve phase margin. Additionally, verify the device is operated within the recommended input voltage range and the output voltage is within the specified range.
The minimum input voltage required for the TPS2068DGN to operate is 2.7V. However, the device can operate down to 2.5V with reduced performance. It's essential to ensure the input voltage is within the recommended range to maintain the device's performance and stability.
The TPS2068DGN is rated for operation up to 85°C. However, the device's performance and reliability may degrade at higher temperatures. If your application requires operation above 85°C, consider using a heat sink or a thermally enhanced package. Always verify the device's performance and reliability in your specific application.
The output voltage of the TPS2068DGN is set by the resistor divider network consisting of R1 and R2. The output voltage can be calculated using the formula: Vout = 1.24V x (1 + R2/R1). Ensure the resistors are of high precision and low tolerance to maintain accurate output voltage regulation.
TPS2068DGN datasheet
by Texas Instruments
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