Ordering number : ENA1920A LV5769V Bi-CMOS IC 1-channel Step-down Switching Regulator http://onsemi.com Overview The LV5769V is a 1-channel step-down switching regulator. Function • 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. It is detected by using ON resistance of an external MOS. • Synchronous rectification • Current mode control SSOP16(225mil) Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Allowable pin voltage Supply voltage Symbol Conditions VIN max Ratings Unit 45 V VIN, SW 45 V HDRV, CBOOT 52 V LDRV 6.0 V Between CBOOT to SW 6.0 V Between CBOOT to HDRV EN, ILIM Between VIN to ILIM VDD SS, FB, COMP,RT Mounted on a specified board. * VIN+0.3 V 1.0 V 6.0 V VDD+0.3 V Allowable Power dissipation Pd max 0.74 W Operating temperature Topr -40 to +85 °C Storage temperature Tstg -55 to +150 °C * Specified board : 114.3mm × 76.1mm × 1.6mm, glass epoxy board. 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 9 of this data sheet. Semiconductor Components Industries, LLC, 2014 March, 2014 30614NK/20911SY 20110121-S00005,S00006 No.A1920-1/9 LV5769V Recommended Operating Conditions at Ta = 25°C Parameter Symbol Conditions Ratings Unit Supply voltage range VIN 8.5 to 42 V Error amplifier input voltage VFB 0 to 1.6 V Oscillatory frequency FOSC 80 to 500 kHz 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, VCC = 12V Parameter Symbol Conditions Ratings min typ Unit max Reference voltage block Internal reference voltage Vref Including offset of E/A 0.654 0.67 0.686 V 5V power supply VDD IOUT = 0 to 5mA 4.7 5.2 5.7 V 110 125 140 kHz Triangular waveform oscillator block Oscillation frequency FOSC RT=220kΩ Frequency variation FOSC DV VIN = 8.5 to 32V Oscillation frequency fold back VOSC FB FB voltage detection after SS ends 1 % 0.1 V detection voltage Oscillation frequency after fold FOSC FB 1/3FOSC kHz back ON/OFF circuit block IC start-up voltage VEN on 2.5 3.0 3.5 V IC off voltage VEN off 1.1 1.3 1.5 V 4 5 6 Soft start circuit block Soft start source current ISS SC EN > 3.5V Soft start sink current ISS SK EN < 1V, VDD = 5V 2 μA mA UVLO circuit block UVLO lock release voltage VUVLO UVLO hysteresis VUVLO H 8 V 0.7 V Error amplifier Input bias current IEA IN Error amplifier gain GEA 1000 Sink output current IEA OSK FB = 1.0V Source output current IEA OSC FB = 0V Current detection amplifier gain GISNS 1400 100 nA 1800 μA/V -100 μA 100 μA 1.5 over current limiter circuit block Reference current ILIM Over current detection VLIM OFS +10% μA -5 +5 mV VIN-0.45 VIN V -10% 18.5 comparator offset voltage Over current detection comparator common mode input range PWM comparator Input threshold voltage Vt max Duty cycle = DMAX 0.9 1.0 1.1 V (FOSC=125kHz) Vt0 Duty cycle = 0% 0.4 0.5 0.6 V Maximum ON duty DMAX 86 90 95 % Output block Output stage ON resistance RONH 5 Ω RONL 5 Ω (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) Continued on next page. No.A1920-2/9 LV5769V Continued from preceding page. Parameter Symbol Ratings Conditions min typ Unit max The whole device Standby current ICCS EN < 1V Mean consumption current ICCA EN > 3.5V TSD on TSD hys 10 μA 3 mA * Design certification 170 °C * Design certification 30 °C Security function Protection function operating temperature at high temperature Protection function hysteresis at high temperature 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. Package Dimensions unit : mm SSOP16 (225mil) CASE 565AM ISSUE A GENERIC MARKING DIAGRAM* SOLDERING FOOTPRINT* 5.80 1.0 (Unit: mm) 0.32 0.65 NOTE: The measurements are not to guarantee but for reference only. *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. XXXXXXXXXX YMDDD XXXXX = Specific Device Code Y = Year M = Month DDD = Additional Traceability Data *This information is generic. Please refer to device data sheet for actual part marking. No.A1920-3/9 LV5769V Pd max -- Ta Allowable power dissipation, Pd max -- W 1.0 Specified board : 114.3 × 76.1 × 1.6mm3 glass epoxy board. 0.8 0.74 0.6 0.4 0.38 0.2 0 --40 --20 0 20 40 60 8085 100 Ambient temperature, Ta -- C Pin Assignment FB 1 16 SS COMP 2 15 ILIM EN 3 14 VIN 13 NC RT 4 NC 5 LV5769 12 SUBGND SW 6 11 GND CBOOT 7 10 VDD 9 LDRV HDRV 8 Top view No.A1920-4/9 LV5769V Block Diagram VIN 14 5V 5V REGULATOR REFERENCE VOLTAGE TSD VIN UVLO VDD UVLO + OCP Comp ILIM 15 1.1V SD + - SD S Q R VIN S Q R + Current Amp 7 CBOOT 8 HDRV DMAX = 90% SAW WAVE OSCILLATOR fosc forcec 1/3 1.0V 0.5V 6 SW CONTROL Logic + PWM Comp 5V 10 VDD 9 LDRV SS 16 0.67V FB 1 + SS Amp + + - 0.1V 1.2V shut down(SD) Err Amp COMP 2 RT 4 11 GND 0.1V + - FFOLD Amp + 3 EN Pin Function Pin No. 1 Pin name FB Description Error amplifier reverse input pin. By operating the converter, the voltage of this pin becomes 0.67V. The voltage in which the output voltage is divided by an external resistance is applied to this pin. Moreover, when this pin voltage becomes 0.1V or less after a soft start ends, the oscillatory frequency becomes 1/3. 2 COMP Error amplifier output pin. Connect a phase compensation circuit between this pin and GND. 3 EN ON/OFF pin. 4 RT Oscillation frequency setting pin. Resistance is connected with this pin between GND. 5,13 N.C. No connection *2 6 SW Pin to connect with switching node. Upper part NchMOSFET external a source is connected with lower side NchMOSFET 7 CBOOT external a drain. Bootstrap capacity connection pin. This pin becomes a GATE drive power supply of an external NchMOSFET. Connect a bypath capacitor between CBOOT and SW. 8 HDRV An external the upper MOSFET gate drive pin. 9 LDRV An external the lower MOSFET gate drive pin. 10 VDD Power supply pin for an external the lower MOS-FET gate drive. Ground pin. Each reference voltage is based on the voltage of the ground pin. 11 GND 12 SUBGND It is connected with the GND pin of 11pin internally. *3 14 VIN Power supply pin. This pin is monitored by UVLO function. When the voltage of this pin becomes 8V or more by UVLO function, 15 ILIM Reference current pin for current detection. The sink current of about 18.5μA flows to this pin. The IC starts and the soft start function operates. 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 NchMOSFET is off by operating the current limiter comparator. This operation is reset with respect to each PWM pulse. 16 SS Pin to connect a capacitor for soft start. A capacitor for soft start is charged by using the voltage of about 5μA. This pin ends the soft start period by using the voltage of about 1.1V and the frequency fold back function becomes active. *2: There is no problem even if it connects it with GND. *3: Short-circuited and use 11pin and 12pin as GND. No.A1920-5/9 LV5769V I/O pin equivalent circuit chart Pin No. FB, SS Equivalent Circuit VDD 10 FB 1 SS 16 GND 11 Standard voltage 0.67V 0.1V 1.1V 1.3V COMP VDD 10 COMP 2 1.6V GND 11 EN VIN 14 EN 3 GND 11 RT VDD 10 RT 4 GND 11 Continued on next page. No.A1920-6/9 LV5769V Continued from preceding page. Pin No. SW, CBOOT, HDRV Equivalent Circuit VIN 14 CBOOT 7 HDRV 8 SW 6 GND 11 LDRV VDD 10 LDRV 9 GND 11 VDD VIN 14 VDD 10 GND 11 ILIM VIN 14 ILIM 15 GND 11 No.A1920-7/9 LV5769V Boot sequence, UVLO, and TSD operation UVLO 8V 7.3V VIN VDD=90% VDD VREF 0.67V 1.1V Permisson of Foldback SS VOUT HDRV-SW LDRV 170 C 140 C TSD Sequence of overcurrent protection VIN ILIM SW Driving usually Overcurrent protection oparation Overcurrent protection oparation(Foldback oparation) Soft start start section Driving usually IOUT SS FB 0.67V FB=0.1V No.A1920-8/9 LV5769V Sample Application Circuit VIN= 8.5 to 42V C1 C7 R5 14 VIN C6 15 ILIM CBOOT 7 C2 Q1 HDRV 8 3 EN ON/OFF L OUT SW 6 Q2 16 SS 2 COMP C5 R1 C3 C11 R6 C4 C9 FB 1 4 RT R2 D2 R4 LDRV 9 C10 D1 GND 11 VDD 10 C8 R3 GND ORDERING INFORMATION Device LV5769V-MPB-E Package SSOP16 (225mil) (Pb-Free / Halogen Free) Shipping (Qty / Packing) LV5769VZ-MPB-E SSOP16 (225mil) (Pb-Free / Halogen Free) 90 / Fan-Fold LV5769VZ-TLM-E SSOP16 (225mil) (Pb-Free / Halogen Free) 2000 / Tape & Reel 90 / Fan-Fold ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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