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L4975A Datasheet(PDF) 8 Page - STMicroelectronics |
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L4975A Datasheet(HTML) 8 Page - STMicroelectronics |
8 / 21 page ELECTRICAL CHARACTERISTICS (continued) RESET AND POWER FAIL FUNCTIONS Symbol Parameter Test Condition Min. Typ. Max. Unit Fig. V11R Rising Threshold Voltage (pin 11) Vi = 15 to 50V V3 = 5.3V Vref –120 Vref –100 Vref –80 V mV 7D V11F Falling Threshold Voltage (pin 11) Vi = 15 to 50V V3 = 5.3V 4.77 Vref –200 Vref –160 V mV 7D V5H Delay High Threshold Voltage Vi = 15 to 50V V11 =V14 4.95 5.1 5.25 V 7D V5L Delay Low Threshold Voltage Vi = 15 to 50V V11 =V14 V3 = 5.3V 1 1.1 1.2 V 7D –I5SO Delay Source Current V3 = 5.3V; V5 =3V 40 60 80 µA7D I5SI Delay Sink Current V3 = 4.7V; V5 =3V 10 mA 7D V4S Out Saturation Voltage I4 = 15mA; S1 = B V3 = 4.7V 0.4 V 7D I4 Output Leak Current V4 = 50V; S1 = A V3 = 5.3V 100 µA7D V3R Rising Threshold Voltage V11 =V14 4.95 5.1 5.25 V 7D V3H Hysteresys 0.4 0.5 0.6 V 7D I3 Input Bias Current 1 3 µA7D Figure 5: Test and Evaluation Board Circuit TYPICAL PERFORMANCES (using evaluation board) : n = 83% (Vi = 35V ; Vo =VREF ;Io =5A ; fSW = 200KHz) Vo RIPPLE = 30mV (at 5A) with output filter capacitor ESR ≤ 60mΩ Line regulation = 5mV (Vi = 15 to 50V) Load regulation = 15mV (Io = 2 to 5A) For component values, refer to test circuit part list. L4975A 8/21 |
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