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L4973D3.3 Datasheet(PDF) 7 Page - STMicroelectronics |
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L4973D3.3 Datasheet(HTML) 7 Page - STMicroelectronics |
7 / 27 page L4973 Electrical characteristics 7/27 Soft start Soft Start Charge Current 30 45 60 µA Soft Start Discharge Current 15 22 30 µA Inhibit High Level Voltage (2) 3.0 V Low Level Voltage (2) 0.8 V Isource High Level VINH = 3V (2) 10 16 50 µA Isource Low Level VINH = 0.8V (2) 10 15 50 µA DC characteristics Total Operating Quiescent Current Duty Cycle = 50% 4 6 mA Quiescent Current Duty Cycle = 0 2.7 4 mA Total stand-by quiescent current VCC = 24V; VINH = 5V 100 200 µA VCC = 55V; VINH = 5V 150 300 µA Error amplifier High Level Output Voltage 11.0 V Low Level Output Voltage 0.65 V Source Bias Current 1 2 3 µA Source Output Current 200 300 600 µA Sink Output Current 200 300 µA Supply Voltage Ripple Rejection VCOMP = VFB CREF = 4.7µF 1-5mA load current 60 80 dB DC Open Loop Gain RL = ∞ 50 60 dB Transconductance Icomp = -0.1 to 0.1mA; Vcomp = 6V 2.5 mS Oscillator section Ramp valley 0.78 0.85 0.92 V Table 4. Electrical characteristics (continued) (Refer to the test circuit,VCC = 24V; TJ = 25°C, COSC = 2.7nF; ROSC = 20KΩ; unless otherwise specified) Symbol Parameter Test condition Min Typ Max Unit |
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