LV5725JAZ-AH ON Semiconductor

Ordering number : ENA2054A LV5725JA Bi-CMOS LSI Step-down Switching LV5725JA Recommended Operating Range at Ta = 25C Parameter Symbol Conditions Ratings Unit Supply voltage range V 4.5 to 50 V IN Error amplifier input voltage V 0 to 1.6 V FB Oscillatory frequency F 50 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 0.6980.708 0.718V 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= 56k 317365 412kHz OSC Frequency variation F V = 4.5 to 50V 1 % OSC DV IN Fold back detection voltage V After power is supplied to SS, voltage is 0.5 V OSC FB detected FB. Fold back oscillation frequency F RT= 56k , V = 0V 100 130 160 kHz OSC FB FB ON/OFF circuit block IC start-up voltage V on - 2.5 3.0 V EN Hysteresis of startup voltage V hys 0.3 0.6 - V EN Soft start circuit block Soft start source current I SC EN > 3.0V 4 5 6 A SS Soft start sink current I SK EN < 1V, V = 5V 2 mA SS DD Soft start end voltage V END 0.7 0.9 1.1 V SS UVLO circuit block UVLO voltage V 3.7 4.0 4.3 V UVLO Hysteresis of UVLO V 0.3 V UVLO H Error amplifier Input bias current I 100 nA EA IN Error amplifier gain G 1000 1400 1800 A/V EA Range of common-mode input voltage V V = 4.5 to 50V 0 1.6 V EA R IN Output sink current I FB = 1.0V -100 A EA OSK Output source current I FB = 0V 100 A EA OSC Current detection amplifier gain GISNS 2.4 Over current limiter circuit block Reference current I -10% 20 +10% A LIM Over current detection comparator V -5 +5 mV LIM OFS offset voltage Range of over current detection V V-0.45 V V LIM CM IN IN comparator common mode input PWM comparator Input threshold voltage Vt max Duty cycle = D , SW = V 1.151.25 1.35V MAX IN Vt0 Duty cycle = 0%, SW = V 0.50.6 0.7V IN Maximum ON duty D 92 % MAX Continued on next page. No.A2054-2/8