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LV5771QA Datasheet(PDF) 2 Page - ON Semiconductor |
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LV5771QA Datasheet(HTML) 2 Page - ON Semiconductor |
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2 / 12 page  LV5771QA No.A2178-2/12 Recommendation Operating Conditions at Ta = 25 °C Parameter Symbol Conditions Ratings Unit Supply voltage range VIN 8 to 42 V Error amplifier input voltage VFB 0 to 1.6 V Electrical Characteristics at Ta = 25°C, VIN = 12V Ratings Parameter Symbol Conditions min typ max Unit Reference voltage block 5V power supply VDD IOUT = 0 to 5mA 4.7 5.2 5.7 V Internal reference voltage VREF Including offset of E/A 0.69 0.7 0.71 V Triangular waveform oscillator block Oscillation frequency1 FOSC1 VIN = 12V (≈8V to 18V) 870 1000 1130 kHz Oscillation frequency2 FOSC2 VIN = 24V (≈18V to 30V) 1/2 × FOSC1 kHz Oscillation frequency3 FOSC3 VIN = 36V (≈30V to 42V) 1/3 × FOSC1 kHz Oscillation Fold back sense voltage VOSC_FB After power is supplied to SS, voltage is detected FB 0.5 V Oscillation frequency after fold back FOSC_FB 100 150 200 kHz Maximum ON duty DMAX 75 % ON/OFF circuit block EN ON voltage VEN_ON VIN = 8 to 42V 3.4 4.3 V EN OFF voltage VEN_OFF VIN = 8 to 42V 1.0 1.2 V Soft Start circuit block Soft start source current ISS_SC EN > 5V, SS = 0V 4 5 6 μA Soft start sink current ISS_SK EN < 1V, VDD = 5V, SS = 1V 2 mA Voltage to end the soft start function VSS_END 0.7 0.9 1.1 V UVLO circuit block UVLO lock release voltage VUVLO 7.0 7.4 7.8 V UVLO hysteresis VUVLO_H 0.6 V Error amplifier Input bias current IEA_IN 100 nA Error amplifier trans conductance GEA 1000 1400 1800 μA/V Sink output current IEA_OSK FB = 1.0V -100 μA Source output current IEA_OSC FB = 0V 100 μA Over current limiter circuit block1 Over current detection comparator 1 Offset voltage VSNS_OCP (R6 = 20m Ω) 43.5 46 48.5 mV Over current limiter circuit block2 Reference current ILIM -10% 20 +10% μA Over current detection comparator 2 Offset voltage VLIM_OFS -5 +5 mV Over current detection comparator 2 common mode input voltage VIN-0.45 VIN V Over voltage protection circuit block1 Over voltage detection voltage VSNS_OCP 6.7 V Over voltage detection voltage VSNS_COM 6.7 V Over voltage protection circuit block2 Over voltage detection voltage 2 VSDIN 0.7 V Continued on next page. |
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