Exhibit 99.1 Power Integrations Reports First-Quarter Financial Results Quarterly revenues were 91.7million;GAAPearningswere0.07 per diluted share; non-GAAP earnings were 0.18perdilutedshareSANJOSE,CALIF.–May7,2024–PowerIntegrations(NASDAQ:POWI)todayannouncedfinancialresultsforthequarterendedMarch31,2024.Netrevenuesforthefirstquarterwere91.7 million, up two percent from the prior quarter and down 14 percent from the first quarter of 2023. GAAP net income for the fi ...