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LM27761: LM27761DSGR has large output ripple

Part Number: LM27761


The output ripple of LM27761DSGR is relatively large, and currently the peak to peak value tested is approximately 64mV; The current output voltage is -5V; Actually, around -4.9V, adding a capacitor at the output end of LM27761DSGR, 10uF, has improved to around 53mV. Is there any good way to do this? The waveform diagram and schematic diagram are as follows;