ZHCSBE5D August 2013 – June 2025 TPS62090-Q1
PRODUCTION DATA
For best output and input voltage filtering, low-ESR (X5R or X7R) ceramic capacitors are recommended. The input capacitor minimizes input voltage ripple, suppresses input voltage spikes and provides a stable system rail for the device. A 10-μF or larger input capacitor is recommended when FREQ = Low and a 22-μF or larger when FREQ = High.
The output capacitor value can range from 10 μF up to 150 μF and beyond. Load transient testing and measuring the bode plot are good ways to verify stability with larger capacitor values. The recommended typical output capacitor value is 22 μF (nominal) and can vary over a wide range as outline in the output filter selection table. For output voltages above 1.8 V, noise can cause duty cycle jitter. This does not degrade device performance. Using an output capacitor of 2 × 22 μF (nominal) for output voltages >1.8 V avoids duty cycle jitter.
Ceramic capacitor have a DC-Bias effect, which has a strong influence on the final effective capacitance. Choose the right capacitor carefully in combination with considering the package size and voltage rating.