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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC3577 датащи(PDF) 13 Page - Linear Technology |
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LTC3577 датащи(HTML) 13 Page - Linear Technology |
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13 / 52 page  LTC3577/LTC3577-1 13 3577f TYPICAL PERFORMANCE CHARACTERISTICS Step-Down Switching Regulator Output Transient (Burst Mode Operation) Step-Down Switching Regulator Output Transient (Pulse-Skipping Mode) 800mA Step-Down Switching Regulator Feedback Voltage vs Output Current TA = 25°C unless otherwise specified OVP Connection Waveform OVP Reconnection Waveform Step-Down Switching Regulator Switch Impedance vs Temperature 500mA Step-Down Switching Regulator Feedback Voltage vs Output Current OVP Protection Waveform TEMPERATURE (°C) –50 0 0.1 0.3 0.4 0.5 50 0.9 3577 G27 0.2 0 –25 75 100 25 125 0.6 0.7 0.8 800mA NMOS 800mA PMOS 500mA PMOS 500mA NMOS VINX = 3.2V OUTPUT CURRENT (mA) 0.78 0.84 0.85 0.77 0.76 0.83 0.80 0.82 0.81 0.79 0.1 10 100 1000 3577 G28 0.75 1 3.8V 5V Burst Mode OPERATION PULSE-SKIPPING MODE OUTPUT CURRENT (mA) 0.78 0.84 0.85 0.77 0.76 0.83 0.80 0.82 0.81 0.79 0.1 10 100 1000 3577 G29 0.75 1 3.8V 5V Burst Mode OPERATION PULSE-SKIPPING MODE VBUS 5V/DIV OVGATE 5V/DIV 500μs/DIV 3577 G31 OVP INPUT VOLTAGE 0V TO 5V STEP 5V/DIV VBUS 5V/DIV OVGATE 5V/DIV 500μs/DIV 3577 G32 OVP INPUT VOLTAGE 5V TO 10V STEP 5V/DIV VBUS 5V/DIV OVGATE 5V/DIV 500μs/DIV 3577 G33 OVP INPUT VOLTAGE 10V TO 5V STEP 5V/DIV VOUT1 50mV/DIV (AC) VOUT2 50mV/DIV (AC) VOUT3 100mV/DIV (AC) IOUT3 500mA 5mA 3577 G25 50μs/DIV VOUT1 = 3.3V IOUT1 = 10mA VOUT2 = 1.8V IOUT2 = 20mA VOUT3 = 1.2V VOUT = VBAT = 3.8V VOUT1 50mV/DIV (AC) VOUT2 50mV/DIV (AC) VOUT3 100mV/DIV (AC) IOUT3 500mA 5mA 3577 G26 50μs/DIV VOUT1 = 3.3V IOUT1 = 30mA VOUT2 = 1.8V IOUT2 = 20mA VOUT3 = 1.2V VOUT = VBAT = 3.8V LDO Load Step LDO1 50mV/DIV (AC) LDO2 20mV/DIV (AC) IOUT1 100mA 5mA 3577 G30 20μs/DIV LDO1 = 1.2V LDO2 = 2.5V ILDO2 = 40mA VOUT = VBAT = 3.8V |
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