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NCP3125 Datasheet(PDF) 4 Page - ON Semiconductor |
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NCP3125 Datasheet(HTML) 4 Page - ON Semiconductor |
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4 / 22 page  NCP3125 http://onsemi.com 4 Table 3. ELECTRICAL CHARACTERISTICS (−40°C < TJ < 125°C; VIN = 12 V, BST−VSW = 12 V, BST = 12 V, VSW = 24 V, for min/max values unless otherwise noted.) Characteristic Conditions Min Typ Max Unit Input Voltage Range VIN − GND 4.5 13.2 V Boost Voltage Range VBST − GND 4.5 26.5 V SUPPLY CURRENT Quiescent Supply Current VFB = 1.0 V, No Switching, VIN = 13.2 V 1.0 − 10.0 mA Shutdown Supply Current VFB = 1.0 V, COMP = 0 V, VIN = 13.2 V − 4.0 − mA Boost Quiescent Current VFB = 1.0 V, No Switching, VIN = 13.2 V 0.1 − 1.0 mA UNDER VOLTAGE LOCKOUT VIN UVLO Threshold VIN Rising Edge 3.8 − 4.3 V VIN UVLO Hysteresis − − 430 − mV SWITCHING REGULATOR VFB Feedback Voltage, Control Loop in Regulation TJ = 0 to 25°C, 4.5 V < VCC < 13.2 V −40°C v TJ v 125°C, 4.5 v VCC v 13.2 V 792 784 800 800 808 816 mV Oscillator Frequency TJ = 0 to 25°C, 4.5 V < VCC < 13.2 V −40°C v TJ v 125°C, 4.5 v VCC v 13.2 V 300 290 350 350 400 410 kHz Ramp−Amplitude Voltage 0.8 1.1 1.4 V Minimum Duty Ratio − 5.5 − % Maximum Duty Ratio 70 75 80 % PWM COMPENSATION Transconductance 3.0 − 5 mS Open Loop DC Gain CO = 1 nF 55 70 − dB Output Source Current Output Sink Current VFB < 0.8 V VFB > 0.8 V 60 60 125 125 200 200 mA Input Bias Current − 0.160 1.0 mA ENABLE Enable Threshold 0.3 0.4 0.5 V SOFT−START Delay to Soft−Start 3 − 15 ms SS Source Current VFB < 0.8 V − 10.5 − mA Switch Over Threshold VFB = 0.8 V − 100 − % of Vref OVER−CURRENT PROTECTION OCSET Current Source Sourced from ISET pin, before SS − 10 − mA OC Switch−Over Threshold − 700 − mV Fixed OC Threshold − 375 mV PWM OUTPUT STAGE High−Side Switch On−Resistance VIN = 12 V (Note 5) VIN = 5 V (Note 5) 60 80 75 100 mW Low−Side Switch On−Resistance VIN = 12 V (Note 5) VIN = 5 V (Note 5) 36 45 40 50 mW 5. Guaranteed by design. |
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