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L4971 Datasheet(PDF) 4 Page - STMicroelectronics |
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L4971 Datasheet(HTML) 4 Page - STMicroelectronics |
4 / 12 page Symbol Parameter Test Condition Min. Typ. Max. Unit DC Characteristics Iqop Total operating quiescent current 46 mA Iq Quiescent current Duty Cycle = 0; VFB = 3.8V 2.5 3.5 mA Iqst-by Total stand-by quiescent current Vinh <0.9V 100 200 µA Vcc = 55V; Vinh <0.9V 150 300 µA Error Amplifier VFB Voltage Feedback Input 3.33 3.36 3.39 V RL Line regulation Vcc = 8 to 55V 5 10 mV Ref. voltage stability vs temperature * 0.4 mV/ °C VoH High level output voltage VFB = 2.5V 10.3 V VoL Low level output voltage VFB = 3.8V 0.65 V Io source Source output current Vcomp = 6V; VFB = 2.5V 200 300 µA Io sink Sink output current Vcomp = 6V; VFB = 3.8V 200 300 µA Ib Source bias current 2 3 µA SVRR E/A Supply voltage ripple rejection Vcomp =Vfb; Vcc = 8 to 55V 60 80 dB DC open loop gain RL = ∞ 50 57 dB gm Transconductance Icomp = -0.1 to 0.1mA Vcomp =6V 2.5 ms Oscillator Section Ramp Valley 0.78 0.85 0.92 V Ramp peak Vcc = 8V 2 2.15 2.3 V Vcc = 55V 9 9.6 10.2 V Maximum duty cycle 95 97 % Maximum Frequency Duty Cycle = 0% Rosc = 13k Ω,Cosc = 820pF 500 kHz ELECTRICAL CHARACTERISTICS (continued) L4971 4/12 |
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