LV5769V

Ordering number : ENA1920 Bi-CMOS LSI LV5769V/VZ Overview Functions 1-channel Step-down Switching Regulator The LV5769V/VZ is a 1-channel step-down switching regulator. • 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 Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Supply voltage VIN, SW HDRV, CBOOT Allowable pin voltage LDRV Between CBOOT to SW Between CBOOT to HDRV EN, ILIM Between VIN to ILIM VDD SS, FB, COMP,RT Allowable Power dissipation Operating temperature Storage temperature Pd max Topr Tstg Mounted on a specified board. * VIN+0.3 1.0 6.0 VDD+0.3 0.74 -40 to +85 -55 to +150 V V V V W °C °C Symbol VIN max Conditions Ratings 45 45 52 6.0 6.0 Unit V V V V V * Specified board : 114.3mm × 76.1mm × 1.6mm, glass epoxy board. Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer' s products or equipment. 20211 SY 20110121-S00005 No.A1920-1/8 LV5769V/VZ Recommended Operating Range at Ta = 25°C Parameter Supply voltage range Error amplifier input voltage Oscillatory frequency Symbol VIN VFB FOSC Conditions Ratings 8.5 to 42 0 to 1.6 80 to 500 Unit V V kHz Electrical Characteristics at Ta = 25°C, VIN = 12V Parameter Reference voltage block Internal reference voltage 5V power supply Triangular waveform oscillator block Oscillation frequency Frequency variation Oscillation frequency fold back detection voltage Oscillation frequency after fold back ON/OFF circuit block IC start-up voltage IC off voltage Soft start circuit block Soft start source current Soft start sink current UVLO circuit block UVLO lock release voltage UVLO hysteresis Error amplifier Input bias current Error amplifier gain Sink output current Source output current Current detection amplifier gain over current limiter circuit block Reference current Over current detection comparator offset voltage Over current detection comparator common mode input range PWM comparator Input threshold voltage (FOSC=125kHz) Maximum ON duty Output block Output stage ON resistance (the upper side) Output stage ON resistance (the under side) Output stage ON current (the upper side) Output stage ON current (the under side) The whole device Standby current Mean consumption current ICCS ICCA EN < 1V EN > 3.5V 3 10 μA mA Continued on next page. IONL 240 mA IONH 240 mA RONL 5 Ω RONH 5 Ω Vt max Vt0 DMAX Duty cycle = DMAX Duty cycle = 0% 0.9 0.4 86 1.0 0.5 90 1.1 0.6 95 V V % VIN-0.45 VIN V ILIM VLIM OFS -10% -5 18.5 +10% +5 μA mV IEA IN GEA IEA OSK IEA OSC GISNS FB = 1.0V FB = 0V 1000 1400 -100 100 1.5 100 1800 nA μA/V μA μA VUVLO VUVLO H 8 0.7 V V ISS SC ISS SK EN > 3.5V EN < 1V, VDD = 5V 4 5 2 6 μA mA VEN on VEN off 2.5 1.1 3.0 1.3 3.5 1.5 V V FOSC FB 1/3FOSC kHz FOSC FOSC DV VOSC FB RT=220kΩ VIN = 8.5 to 32V FB voltage detection after SS ends 110 125 1 0.1 140 kHz % V Vref VDD Including offset of E/A IOUT = 0 to 5mA 0.654 4.7 0.67 5.2 0.686 5.7 V V Symbol Conditions Ratings min typ max Unit No.A1920-2/8 LV5769V/VZ Continued from preceding page. Parameter Security function Protection function operating temperature at high temperature Protection function hysteresis at high temperature TSD hys * Design certification 30 °C TSD on * Design certification 170 °C Symbol Conditions Ratings min typ max Unit Package Dimensions unit : mm (typ) 3178B Allowable power dissipation, Pd max -- W 5.2 16 9 1.0 Pd max -- Ta Specified board : 114.3 × 76.1 × 1.6mm3 glass epoxy board. 0.8 0.74 4.4 6.4 0.6 0.5 0.4 0.38 1 0.65 (0.33) 8 0.15 0.22 1.5max 0.2 0 --40 --20 0 20 40 60 8085 100 SANYO : SSOP16(225mil) Pin Assignment 0.1 (1.3) Ambient temperature, Ta -- C FB 1 COMP 2 EN 3 RT 4 NC 5 SW 6 CBOOT 7 HDRV 8 Top view 16 SS 15 ILIM 14 VIN 13 NC LV5769 12 SUBGND 11 GND 10 VDD 9 LDRV No.A1920-3/8 LV5769V/VZ Block Diagram VIN 14 5V REGULATOR 5V REFERENCE VOLTAGE VDD UVLO TSD VIN UVLO ILIM 15 + OCP Comp SQ R VIN + Current Amp SAW WAVE OSCILLATOR fosc forcec 1/3 7 CBOOT 8 HDRV DMAX = 90% 1.0V 0.5V 6 SW + PWM Comp CONTROL Logic 5V 10 VDD 9 LDRV 1.1V SD + - SD SQ R SS 16 FB 1 COMP 2 0.67V + + - + SS Amp Err Amp 11 GND 0.1V shut down(SD) 0.1V 1.2V RT 4 + - + - 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 3 4 5,13 6 7 8 9 10 11 12 14 15 COMP EN RT N.C. SW CBOOT HDRV LDRV VDD GND SUBGND VIN ILIM Error amplifier output pin. Connect a phase compensation circuit between this pin and GND. ON/OFF pin. Oscillation frequency setting pin. Resistance is connected with this pin between GND. No connection *2 Pin to connect with switching node. Upper part NchMOSFET external a source is connected with lower side NchMOSFET 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. An external the upper MOSFET gate drive pin. An external the lower MOSFET gate drive pin. 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. It is connected with the GND pin of 11pin internally. *3 Power supply pin. This pin is monitored by UVLO function. When the voltage of this pin becomes 8V or more by UVLO function, The IC starts and the soft start function operates. Reference current pin for current detection. The sink current of about 18.5μA 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 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.A1920-4/8 LV5769V/VZ I/O pin equivalent circuit chart Pin No. FB, SS VDD 10 Equivalent Circuit FB 1 SS 16 GND 11 Standard voltage 0.67V 0.1V 1.3V 1.1V 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.A1920-5/8 LV5769V/VZ Continued from preceding page. Pin No. SW, CBOOT, HDRV VIN 14 CBOOT 7 Equivalent Circuit 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.A1920-6/8 LV5769V/VZ Boot sequence, UVLO, and TSD operation UVLO 8V VIN VDD=90% VDD 1.1V 7.3V VREF 0.67V SS Permisson of Foldback 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.A1920-7/8 LV5769V/VZ Sample Application Circuit VIN= 8.5 to 42V C1 C7 14 VIN R5 C6 15 ILIM CBOOT 7 HDRV 8 C2 Q1 L OUT Q2 D2 R4 C4 C9 D1 R3 C10 ON/OFF 3 EN 16 SS 2 COMP C5 R1 R2 C3 C11 R6 4 RT GND 11 SW 6 LDRV 9 FB 1 VDD 10 C8 GND SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. 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SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of February, 2011. Specifications and information herein are subject to change without notice. PS No.A1920-8/8