LV5768V-A Bi-CMOS IC www.onsemi.com 1- channel Step-down Switching Regulator Overview The LV5768V-A is a 1-channel step-down switching regulator. Feature 1 channel step-down switching regulator controller. Frequency decrease function at pendent. Load-independent soft start circuit. ON/OFF function. Built-in pulse-by-pulse OCP circuit. SSOP16(225mil) It is detected by using ON resistance of an external MOS. Synchronous rectification Current mode control Specifications Absolute Maximum Ratings at Ta = 25C Parameter Symbol Conditions Ratings Unit Supply voltage V max 45 V IN V , SW 45 V IN HDRV, CBOOT 52 V LDRV 6.0 V Between CBOOT to SW 6.0 V Between CBOOT to HDRV EN, ILIM V+0.3 V IN Between V to ILIM 1.0 V IN V 6.0 V DD SS, FB, COMP,RT V+0.3 V DD Allowable Power dissipation Pd max Mounted on a specified board. *1 0.74 W Operating temperature Topr -40 to +85 C Storage temperature Tstg -55 to +150 C *1 Specified board : 114.3mm 76.1mm 1.6mm, glass epoxy board. Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time. Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current, high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details. Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. ORDERING INFORMATION See detailed ordering and shipping information on page 17 of this data sheet. Semiconductor Components Industries, LLC, 2015 1 Publication Order Number : February 2015 - Rev. 0 LV5678V-A/D Allowable pin voltage LV5768V-A 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 Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. Electrical Characteristics at Ta 25 C, 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 86 90 95 % Output block Output stage ON resistance R 5 ONH (the upper side) Output stage ON resistance R 5 ONL (the lower side) Output stage ON current I 240 mA ONH (the upper side) Output stage ON current I 240 mA ONL (the lower side) Continued on next page No.A2093-2/2