ZHCSGZ6A October 2017 – February 2025 TPS6508700
PRODUCTION DATA
請參考 PDF 數據表獲取器件具體的封裝圖。
Ceramic capacitors with low ESR values are recommended because they provide the lowest output voltage ripple. The output capacitor requires either an X7R or X5R rating. Y5V and Z5U capacitors, aside from the wide variation in capacitance over temperature, become resistive at high frequencies.
At light load currents, the converter operates in PFM mode and the output voltage ripple is dependent on the output-capacitor value and the PFM peak inductor current. Higher output-capacitor values minimize the voltage ripple in PFM mode. To achieve the specified regulation performance and low output-voltage ripple, the DC-bias characteristic of ceramic capacitors must be considered. The effective capacitance of ceramic capacitors drops with increasing DC-bias voltage.
For the output capacitors of the buck converters, TI recommends placing small ceramic capacitors between the inductor and load with many vias to the PGND plane. This solution typically provides the smallest and lowest-cost solution available for D-CAP2 controllers.
The output capacitance must equal or exceed the minimum capacitance listed for BUCK3, BUCK4, and BUCK5 (assuming quality layout techniques are followed).