Ordering number : ENA1920 Bi-CMOS LSI LV5769V/VZ 1-channel Step-down Switching Regulator Overview The LV5769V/VZ is a 1-channel step-down switching regulator. Functions • 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 Symbol Conditions VIN max Allowable pin voltage VIN, SW Ratings Unit 45 V 45 V HDRV, CBOOT 52 V LDRV 6.0 V Between CBOOT to SW 6.0 V Between CBOOT to HDRV EN, ILIM VIN+0.3 V Between VIN to ILIM 1.0 V VDD 6.0 V SS, FB, COMP,RT VDD+0.3 V 0.74 W Topr -40 to +85 °C Tstg -55 to +150 °C Allowable Power dissipation Pd max Operating temperature Storage temperature Mounted on a specified board. * * 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 Symbol Conditions Ratings VIN Error amplifier input voltage VFB Oscillatory frequency FOSC Unit 8.5 to 42 0 to 1.6 80 to 500 V V kHz Electrical Characteristics at Ta = 25°C, VIN = 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 Oscillation frequency FOSC RT=220kΩ 110 125 140 kHz Frequency variation FOSC DV VIN = 8.5 to 32V Oscillation frequency fold back VOSC FB FB voltage detection after SS ends Triangular waveform oscillator block 1 % 0.1 V detection voltage Oscillation frequency after fold back FOSC FB 1/3FOSC kHz 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 Sink output current IEA OSK FB = 1.0V Source output current IEA OSC FB = 0V Current detection amplifier gain GISNS 1000 1400 100 nA 1800 μA/V -100 μA 100 μA 1.5 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% 18.5 offset voltage Over current detection comparator common mode input range PWM comparator Input threshold voltage (FOSC=125kHz) Vt max Duty cycle = DMAX 0.9 1.0 1.1 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) The whole device Standby current ICCS EN < 1V Mean consumption current ICCA EN > 3.5V 10 3 μA mA Continued on next page. No.A1920-2/8 LV5769V/VZ Continued from preceding page. Parameter Symbol Ratings Conditions min typ Unit max Security function Protection function operating TSD on * Design certification 170 °C TSD hys * Design certification 30 °C temperature at high temperature Protection function hysteresis at high temperature Package Dimensions unit : mm (typ) 3178B Allowable power dissipation, Pd max -- W 0.5 6.4 9 4.4 16 1 8 0.65 0.15 0.22 1.5max (0.33) Pd max -- Ta 1.0 5.2 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 0.1 (1.3) Ambient temperature, Ta -- C SANYO : SSOP16(225mil) 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.A1920-3/8 LV5769V/VZ 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 external a drain. 7 CBOOT 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. 11 GND Ground pin. Each reference voltage is based on the voltage of the ground pin. 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, The IC starts and the soft start function operates. 15 ILIM 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 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.A1920-5/8 LV5769V/VZ 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.A1920-6/8 LV5769V/VZ 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.A1920-7/8 LV5769V/VZ 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 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. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of SANYO Semiconductor Co.,Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO Semiconductor Co.,Ltd. product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. 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