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L4921 数据表(PDF) 3 Page - STMicroelectronics |
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L4921 数据表(HTML) 3 Page - STMicroelectronics |
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3 / 7 page ![]() (*) Foldback protection. Note : 1. Design limits are guaranteed (but not 100% production tested) over the indicated temperatu re and supply voltage ranges. These limits are not used to calculate outgoing quality levels. ELECTRICAL CHARACTERISTICS (forVI =14.4V,TJ =25 °C,VO = 5V,CO =100µF,unlessOtherwiseSpeci- fied) Symbol Parameter Test Condition Min. Typ. Max. Unit VI Operating Input Voltage VO ≥ 4.5V, IO = 400mA VO + 0.7 26 V VREF ≤ VO < 4.5V, IO = 400mA 5.2 26 V VREF Reference Voltage 5.2V < VI < 26V 5mA ≤ IO ≤ 400mA (*) 1.20 1.25 1.30 V ∆VO Line Regulation VO +1V < VI < 26V, VO ≥ 4.5V IO = 5mA 1 10 mV/V ∆VO Load Regulation 5mA ≤ IO ≤ 400mA (*) VO ≥ 4.5V 3 15 mV/V VD Dropout Voltage IO = 10mA IO = 150mA IO = 400mA 0.05 0.2 0.4 0.4 0.7 V V V IQ Quiescent Current IO = 0mA VO +1V < VI <26V 0.8 2 mA IO = 400mA (*) VO +1V < VI <26V 65 90 mA IO Maximal Output Current 800 mA IOSC Short Circuit Output Current (*) 350 500 mA (* ) F oldback pr otection ELECTRICAL CHARACTERISTICS (for VI = 14.4V,–40 ≤ TJ ≤ 125°C (note1), VO = 5V,CO =100µF, unless Otherwise Specified) Symbol Parameter Test Condition Min. Typ. Max. Unit VI Operating Input Voltage VO ≥ 4.5V, IO = 400mA VO + 0.9 26 V VREF ≤ VO < 4.5V, IO = 400mA 5.2 26 V VREF Reference Voltage 5.4V < VI < 26V 1.17 1.25 1.33 V ∆VO Line Regulation VO + 1.2V < VI < 26V, VO ≥ 4.5V IO = 5mA 2 15 mV/V ∆VO Load Regulation 5mA ≤ IO ≤ 400mA (*) VO ≥ 4.5V 5 25 mV/V VD Dropout Voltage IO = 150mA IO = 400mA 0.2 0.4 0.4 0.7 V V IQ Quiescent Current IO = 0mA VO + 1.2V < VI <26V 1,2 3 mA IO = 400mA (*) VO + 1.2V < VI <26V 80 140 mA IO Maximal Output Current 870 mA IOSC Short Circuit Output Current (*) 230 500 mA L4920/L4921 3/7 |
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