Ordering number : ENA2331 LV5762QA Bi-CMOS IC Step-down Switching Regulator http://onsemi.com Overview LV5762QA is a 1ch step-down voltage switching regulator. Function • 1ch step-down switching regulator controller • Load-independent soft start circuit • Frequency fold back function • ON/OFF function • Built-in pulse-by-pulse OCP circuit. It is detected by using ON resistance of an external MOS. VQFN16J ( 3.0 × 3.0 ) Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Supply voltage VIN max Allowable power dissipation Pd max Operating temperature Storage temperature Conditions Ratings Unit 45 V 0.65 W Topr –40 to 85 °C Tstg –55 to 150 °C *) * Specified board: 24.0mm × 15.0mm ×1.6mm, glass epoxy board (2-layer). 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. Recommended Operating Conditions at Ta = 25°C Parameter Symbol Conditions Ratings Unit Supply voltage range 1 VIN 8 to 42 V Error amplifier input coltage VFB 0 to 1.6 V 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. ORDERING INFORMATION See detailed ordering and shipping information on page 6 of this data sheet. Semiconductor Components Industries, LLC, 2014 May, 2014 51514NK 20120928-S00002 No.A2331-1/6 LV5762QA Electrical Characteristics at Ta = 25°C, VIN = 24V Parameter Symbol Conditions Ratings min typ Unit max Reference voltage block Internal reference voltage Vref Including offset of E/A 5V power supply VDD IOUT=0 to 5mA 0.695 0.705 0.715 V 4.7 5.2 5.7 V 870 1000 1130 Triangular waveform oscillator block Oscillation frequency fOSC Frequency variation fOSC_DV VIN=8 to 42V VOSC_FB Detect IN voltage after the end of SS Oscillatory frequency fold back kHz 1 % 0.5 V detection voltage Oscillatory frequency after fold back fOSC_FB 100 150 200 kHz 3.4 4.3 V ON/OFF circuit block VEN_on VIN=8 to 42V VEN_off VIN=8 to 42V 1.1 1.3 ISS_SC EN > 5V, SS=0V 3.4 4.3 Soft start sink current ISS_SK EN < 1V, VDD=5V, SS=1V Voltage to end the soft start function VSS_END 0.7 0.9 1.1 V UVLO lock release voltage VUVLO 7.0 7.4 7.8 V UVLO hysteresis VUVLO_H IC start-up voltage IC off voltage V Soft start circuit block Soft start source current 5.2 2 μA mA UVLO circuit block 0.6 V Error amplifier Input bias current IEA_IN Error amplifier transconductance GEA Common mode input voltage range VEA_R VIN=8 to 42V Sink output current IEA_OSK FB=1.0V Source output current IEA_OSC FB=0V Current detection amplifier gain GISNS 1000 1400 0.0 100 nA 1800 μA/V 1.6 V –100 μA 100 μA 1.3 Over current limiter circuit block Reference current ILIM Over current detection comparator VLIM_OFS +10% μA –5 +5 mV VIN–0.45 VIN V V –10% 20 offset voltage Over current detection comparator common mode input range PWM comparator Input threshold voltage Vtmax Duty cycle=DMAX 0.95 1.1 1.25 Vt0 Duty cycle=0% 0.35 0.45 0.55 Maximum ON duty DMAX 75 80 % RONH 5 Ω RONL 5 Ω V Output block Output stage ON resistance (the upper side) Output stage ON resistance (the under side) Output stage ON current IONH 240 mA IONL 240 mA (the upper side) Output stage ON current (the under side) The whole device Standby current ICCS EN < 1V Mean consumption current ICCA EN > 5V 60 3.6 μA mA Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. No.A2331-2/6 LV5762QA Package Dimensions unit : mm WQFN16 3x3, 0.5P / VQFN16J CASE 510AX ISSUE A GENERIC MARKING DIAGRAM* XXXXXX YMDDD XXXXX = Specific Device Code Y = Year M = Month No.A2331-3/6 LV5762QA COMP 1 EN 2 SW 3 FB NC NC SS/ HICCUP Pin Assignment 16 15 14 13 (17) SUBGND 6 7 8 NC LDRV HDRV 5 NC CBOOT 4 12 ILIM 11 VIN 10 GND 9 VDD (TOP VIEW) Pin Function Pin No. Pin name Function 1 COMP Error amplifier output pin. 2 EN ON/OFF pin. 3 SW Pin to connect with switching node. The source of Nch MOSFET connects to this pin. 4 CBOOT Bootstrap capacity connection pin. This pin becomes a GATE drive power supply of an external Nch MOSFET. 5 HDRV An external the upper MOSFET gate drive pin. 6 NC No connection 8 LDRV An external the lower MOSFET gate drive pin. 9 VDD Power supply pin for an external the MOS-FET gate drive. 10 GND Ground pin. Each reference voltage is based on the voltage of the ground pin. 11 VIN Power supply pin. Connect a phase compensation circuit between this pin and GND. Connect a bypath capacitor between CBOOT and SW. 7 14 15 This pin is monitored by UVLO function. When the voltage of this pin becomes 7.8V or more by UVLO function, The IC starts and the soft start function operates. 12 ILIM Reference current pin for current detection. The sink current of about 20μA flows to this pin. When a resistance is connected between this pin and VIN outside and the voltage applied to the SW pin is lower than the voltage of the terminal side of the resistance, the upper Nch MOSFET is off by operating the current limiter comparator. This operation is reset with respect to each PWN pulse. 13 SS/HICCUP Pin to connect a capacitor for soft start. A capacitor for soft start is charged by using the voltage of about 4.3μA. This pin ends the soft start period by using the voltage of about 0.9V and the frequency fold back function becomes active. 16 FB Error amplifier reverse input pin. By operating the converter, the voltage of this pin becomes 0.7V. The voltage in which the output voltage is divided by an external resistance is applied to this pin. Also, the oscillation frequency become one-eighth when the voltage of this pin becomes 0.4V or less after soft start function. 17 SUBGND Connect to GND No.A2331-4/6 LV5762QA Block Diagram VIN 5V REGULATOR REFERENCE VOLTAGE TSD UVLO S ILIM + VIN OCP Comp + - Current Amp + 1.3V - Q R HICCUP Comp CBOOT + OCP 0.9V - SD SS/ HICCUP FB 0.7V HDRV SS Comp SW R SD + + - Q S SAW WAVE OSCILLATOR HICCUP Comp D-max=90% 1.1V 0.45V + - fOSC forced 1/8 COMP CONTROL Logic VDD + LDRV - GND + Shutdown(SD) 0.5V EN Sample Application Circuit VIN=8V to 42V C7 R5 VIN C6 ILIM CBOOT ON/OFF C1 C2 Q1 HDRV EN LV5762QA LV5762LF L OUT SW Q2 SS/HICCUP R4 LDRV C4 D1 FB C5 R1 COMP GND R2 C3 C31 C9 VDD D2 C10 R3 C8 GND No.A2331-5/6 LV5762QA ORDERING INFORMATION Device LV5762QA-NH Package VQFN16J (Pb-Free / Halogen Free) Shipping (Qty / Packing) 2000 / Tape & Reel ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. 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