LV5768M-TLM-H ON Semiconductor

Ordering number : ENA1988 LV5768M Bi-CMOS LSI 1-channel Step-down LV5768M Recommended Operating Range at Ta = 25C Parameter Symbol Conditions Ratings Unit Supply voltage range V 8.5 to 42 V IN Error amplifier input voltage V 0 to 1.6 V FB Oscillatory frequency F 80 to 500 kHz OSC Electrical Characteristics at Ta = 25C, V = 12V IN Ratings Parameter Symbol Conditions Unit min typ max Reference voltage block Internal reference voltage Vref Including offset of E/A 0.6540.67 0.686V 5V power supply V I = 0 to 5mA 4.7 5.2 5.7 V DD OUT Triangular waveform oscillator block Oscillation frequency F RT=220k 110125 140kHz OSC Frequency variation F V = 8.5 to 42V 1 % OSC DV IN Oscillation frequency fold back V FB voltage detection after SS ends 0.1 V OSC FB detection voltage Oscillation frequency after fold back F 1/3F kHz OSC FB OSC ON/OFF circuit block IC start-up voltage V on 2.5 3.0 3.5 V EN IC off voltage V off 1.0 1.2 1.4 V EN Soft start circuit block Soft start source current I SC EN > 3.5V 4 5 6 A SS Soft start sink current I SK EN < 1V, V = 5V 2 mA SS DD UVLO circuit block UVLO lock release voltage V 8 V UVLO UVLO hysteresis V 0.7 V UVLO H Error amplifier Input bias current I 100 nA EA IN Error amplifier gain G 1000 1400 1800 A/V EA Sink output current I FB = 1.0V -100 A EA OSK Source output current I FB = 0V 100 A EA OSC Current detection amplifier gain GISNS 1.5 over current limiter circuit block Reference current I1 -10% 18.5 +10% A LIM Over current detection comparator V -5 +5 mV LIM OFS offset voltage Over current detection comparator V-0.45 V V IN IN common mode input range PWM comparator Input threshold voltage Vt max Duty cycle = DMAX 0.9 1.0 1.1 V (F =125kHz) OSC Vt0 Duty cycle = 0% 0.4 0.5 0.6 V Maximum ON duty DMAX 85 90 95 % Output block Output stage ON resistance R 5 ONH (the upper side) Output stage ON resistance R 5 ONL (the under side) Output stage ON current I 240 mA ONH (the upper side) Output stage ON current I 240 mA ONL (the under side) The whole device Standby current I EN < 1V 10 A CCS Mean consumption current I EN > 3.5V 3 mA CCA Continued on next page. No.A1988-2/15