Ordering number : ENA1875 Bi-CMOS IC Low power consumption and high efficiency LV5068V Step-down Switching Regulator Controller Overview LV5068V is 1ch step-down switching regulator. The operation current is about 80μA, and low power consumption is achieved. Functions • 1ch SBD rectification controller IC • Maximum value of light load mode current is 80μA. • Built-in OCP circuit with P-by-P method • When P-by-P is generated continuously, it shifts to the HICCUP operation. • If connect C-HICCUP to GND pin, then latch-off when over current. • The oscillatory frequency can be set by the external pin. The oscillatory frequency is 300 kHz to 2.2MHz • Built-in UVLO, TSD • Synchronous driving with external signal Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Input voltage VIN max Allowable pin voltage PDR,HDRV,RSNS, Conditions Ratings Unit 45 V VIN V 6 V ILIM,EN,PG VIN-PDR REF SS,FB,COMP,RT 6 V REF V 0.74 W C-HICCUP,SYNC Allowable power dissipation Pd max Specified substrate *1 Operating temperature Topr -40 to +85 ˚C Storage temperature Tstg -55 to +150 ˚C *1: Specified substrate 114.3mm×76.1mm×1.6mm3 glass-epoxy 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. N1010 SY 20101102-S00002 No.A1875-1/6 LV5068V Recommended Operating Conditions at Ta = 25°C Parameter Input voltage range Symbol Conditions Ratings VIN Unit 4.5 to 40 V Electrical Characteristics at Ta = 25°C, VIN = 15V Parameter Symbol Ratings Conditions min Unit typ max Reference voltage Internal reference voltage Vref Pch drive voltage VPDR IOUT=0 to -5mA FOSC RT=470kΩ 1.241 1.260 1.279 V VIN-5.5 VIN-5.0 VIN-4.5 V 280 330 380 kHz 1.5 VIN V 0 0.3 V Saw wave oscillator Oscillatory frequency ON/OFF circuit IC start-up voltage VCNT_ON Disable voltage VCNT_OFF Soft start circuit Soft start source current ISS_SC EN>1.5V 1.3 2.0 2.7 μA Soft start sink current ISS_SK EN<0.3V, SS=4V 1.0 1.6 2.2 mA UVLO release voltage VUVLON FB=COMP 3.3 3.7 4.1 V UVLO lock voltage VUVLOF FB=COMP 2.5 2.9 3.3 V -100 -50 100 nA 100 250 400 μA/V UVLO circuit Error amplifier Input bias current IEA_IN Error amplifier gain GEA Output sink current IEA_OSK FB=1.75V -40 -20 -10 μA Output source current IES_OSC FB=0.75V 10 20 40 μA 48.4 55 61.6 μA +5 mV Over current limit circuit Reference current ILIM1 Over current detection VLIM_OFS -5 comparator offset voltage RSNS pin input range VRSNS HICCUP timer start-up cycle NLCYCLES HICCUP comparator threshold VtHIC VIN-0.175 VIN 15 V cycle 1.2 1.26 1.32 V 1 2 3 μA voltage HICCUP timer change current IHIC PWM comparator Maximum On-duty D max 95 % Logic output Power good “L” sink current IPWRGD_L PG=5V 4 Power good “H” leakage current IPWRGD_H PG=5V 0 Power good threshold voltage VtPG 1.0 Power good hysteresis VPG_H 40 5 6 mA 1 μA 1.1 1.2 V 50 60 mV Output Output on-resistance (High) RONH 3 Ω Output on-resistance (Low) RONL 3 Ω Output on-current (High) IONH 500 mA Output on-current (Low) IONL 500 mA The entire device Stand-by current ICCS EN<0.3V 0 1 μA Light load mode consumption ISLEEP1 EN>1.5V, 30 55 80 μA 150 170 190 ˚C current Thermal shutdown No switching TSD *2 *2: Design certification No.A1875-2/6 LV5068V Package Dimensions unit : mm (typ) 3178B Pd max -- Ta 1.2 5.2 1 8 0.65 0.15 (0.33) Specified circuit board : 114.3×76.1×1.6mm3 glass epoxy board Allowable power dissipation, Pd max - W 0.5 6.4 9 4.4 16 0.4 0.38 0 -40 -20 0 (1.3) 1.5max 0.22 0.8 0.74 20 40 60 100 80 120 0.1 Ambient temperature, Ta - C SANYO : SSOP16(225mil) Block Diagram VIN 2.EN Hi:ON Lo:OFF R3 Wake-up Band-gap 16.REF REF + uvlo.comp enable TSD C5 7.PDR Pch Drive C3 VIN 4.VIN Bias R1 1.26V R2 HIC CUP.comp 11.C-HICCUP C1 + C8 + - C10 5.RSNS pwm.comp 14.COMP FB 15pluse counter + + 15.FB R6 3.ILIM + PbyP.comp err.amp + 12.SS VIN - C7 enable 1.PG 13.NC PG.comp + - C6 slope + - S Q R Q 6.HDRV Level-shift clk Q1 L PDR OSC C9 R4 D1 1.1V FB 9. SYNC R8 10.RT R7 8.GND C2 R5 No.A1875-3/6 LV5068V Pin Assignment TOP VIEW PG 1 16 REF EN 2 15 FB ILIM 3 14 COMP VIN 4 RSNS 5 13 N.C. LV5068V HDRV 6 12 SS 11 C-HICCUP PDR 7 10 RT GND 8 9 SYNC Pin Descriptions Pin No. 1 Pin name PG Descriptions Power good pin. Connect to open drain of MOS-FET in ICs inside. Equivalent circuit PG Setting output voltage to "L", when FB voltage is 1.05V or less GND 2 EN ON/OFF pin VIN EN GND 3 ILIM For current detection. Sink current is about 55μA. The current limiter comparator VIN works when an external resistor is connected between this pin and VIN, and if the voltage of this resistor is less than the voltage of RSNS then Pch MOS is turned off. This operation is ILIM reset each PWM pulse. GND 4 VIN Supply voltage pin． VIN It is observed by the UVLO function. When its voltage becomes 3.7V or more, ICs startup in soft start. GND 5 RSNS Current detection resistor connection pin. Resistor is connected between VIN and this pin, and the current VIN flows to MOSFET are measured. RSNS GND Continued on next page. No.A1875-4/6 LV5068V Continued from preceding page. Pin No. 6 Pin name HDRV Descriptions Equivalent circuit The external high-side MOSFET gate drive pin． VIN HDRV PDR 7 PDR Gate drive voltage of the external Pch MOSFET. VIN Meanwhile, the bypass capacitor is connected between VIN and this pin. PDR GND 8 GND Ground Pin． VIN Ground pin voltage is reference voltage. GND 9 SYNC Pin of using combined of external synchronous signal input pin VIN SYNC GND 10 RT Oscillation frequency setting pin. Resistor is connected between this pin and GND. VIN RT GND 11 C-HICCUP It is capacitor connection pin for setting re-startup cycle in HICCUP mode． VIN If connect it to GND pin, then latch-off when over current. C-HICCUP GND 12 SS Capacitor connection pin for soft start. About 2μA current charges the soft start capacitor. VIN SS GND 13 NC NC pin. Continued on next page. No.A1875-5/6 LV5068V Continued from preceding page. Pin No. 14 Pin name COMP Descriptions Equivalent circuit Error Amplifier Output Pin． The phase compensation network is connected between GND VIN pin and COMP pin． Thanks to current-mode control, COMP pin voltage would tell you the output current amplitude. COMP pin is connected internally to an int.comparator which comparators with 0.9V COMP reference. If COMP pin voltage is larger than. 0.9V, IC operates in “continuous mode”. If COMP pin voltage is smaller than 0.9V, IC operates in “discontinuous mode (low GND consumption mode)”. 15 FB Error amplifier reverse input pin． ICs make its voltage keep 1.26V. Output voltage is divided by VIN external resistors and it across FB. FB GND 16 REF Reference voltage. VIN REF 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 November, 2010. Specifications and information herein are subject to change without notice. PS No.A1875-6/6