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L4973D3.3-L4973D5.1 Datasheet(PDF) 5 Page - STMicroelectronics |
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L4973D3.3-L4973D5.1 Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 16 page Sink Output Current 200 300 µA Supply Voltage Ripple Rejection VCOMP = VFB CREF =4.7 µF 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 Ramp peak VCC = 8V 1.9 2.1 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 SYNC FUNCTION High Input Voltage VCC = 8V to 55V 3.5 V Low Input Voltage VCC = 8V to 55V 0.9 V Slave Sink Current 0.15 0.25 0.45 mA Master Output Amplitude Isource = 3mA 4 4.5 V Output Pulse Width no load, Vsync = 4.5V 0.20 0.35 µs (*) Pulse testing with a low duty cycle. (**) The maximum power dissipation of the package must be observed. ELECTRICAL CHARACTERISTICS (continued) L4973 VCC C1 C2 R2 C7 C3 C4 C5 C6 R1 D1 L1 3 x C0 C12 R3 R4 VO C8 4,5,6 13,14,15 7,8 9 1 17 16 11 2,3 12 D97IN515B (DIP18) 10 C1=1000 µF/63V C2=220nF/63V C3=470nF C4=1 µF/50V C5=220pF C6=22nF C7=2.7nF C8=220nF/63V C0=100 µF/40V(C9,C10,C11) C12=Optional (220nF) L1=150 µHK OOL µ 77310 - 40 Turns - 0.9mm R1=9.1K R2=20K D1=GI SB560 VO(V) R3(K Ω) R4(K Ω) 3.3 5.1 12 15 18 24 0 2.7 12 16 20 30 4.7 4.7 4.7 4.7 4.7 L4973 V3.3 VO(V) R3(K Ω) R4(K Ω) 5.1 12 15 18 24 0 6.2 9.1 12 18 4.7 4.7 4.7 4.7 L4973 V5.1 Figure 1. Evaluation Board Circuit L4973V3 - L4973V5 - L4973D3 - L4973D5 5/16 |
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