Ordering number : ENA1670 Bi-CMOS IC LV5072M DC/DC Converter IC Overview The SANYO LV5072M is a DC/DC converter IC that has a step-down DC/DC converter output and an externally-controllable GPO output for discharging the output capacitor. Features • One channel of synchronous rectifying PWM controlled step-down DC/DC converter output (0.8V to 3.3V/2A) • One channel of externally controllable GPO output for discharging the output capacitor • Built-in thermal shutdown circuit • Built-in hiccup recovery Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage VIN VIN, PVIN -0.3 to 6.0 V Input pin voltage VINC GPI, ENDCO -0.3 to 6.0 V Output pin voltage VOUT LX, GPO -0.3 to 6.0 V Allowable Power dissipation Pd max Ta = 25°C Mounted on a circuit board.* 1.5 W Operating temperature Topr -20 to +85 °C Storage temperature Tstg -40 to +125 °C * Specified circuit board : 50.0mm × 50.0mm × 1.6mm, 2-layer glass epoxy printed circuit board, Wiring density on the backside = 54% 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. 31010 SY 20100218-S00003 No.A1670-1/9 LV5072M Operating Conditions at Ta = 25°C Parameter Symbol Supply voltage VIN Input pin voltage VINC Conditions Ratings Unit VIN = PVIN, 0.8V ≤ VOUT ≤ 1.3V 2.95 to 5.5 V VIN = PVIN, 1.3V ≤ VOUT ≤ 1.9V 3.2 to 5.5 V VIN = PVIN, 1.9V ≤ VOUT ≤ 3.3V 4.5 to 5.5 V -0.3 to VIN V GPI, ENDCO Electrical Characteristics, Current drain, unless otherwise specified at Ta = 25°C, VIN = 5.0V, no load Parameter Symbol Ratings Conditions min Unit typ max Standby current drain ICCSB GPI = ENDCO = Low 0.5 10 μA Current drain DCDC ON ICCFL GPI = ENDCO = High, VOUT = 1.8V 12 16 mA DC/DC, unless otherwise specified at Ta = 25°C, VIN = 5.0V, VOUT = 1.8V, no load Parameter Symbol Ratings Conditions min FB voltage VFB IO = 10mA Current limit peak value CLIMIT Efficiency 1 EF1 Efficiency 2 Load regulation Unit typ 0.49 max 0.50 0.51 V 2.3 A IO = 0.5A, VOUT = 3.3V 90 EF2 IO = 0.5A, VOUT = 1.8V 82 VL IO = 1mA to 2A 25 70 mV 2.2 2.7 MHz 1.7 % % Frequency Fosc LX ON resistance RLXP IOH = -300mA, Pch 0.15 Ω RLXN IOL = 300mA, Nch 0.15 Ω GPI, ENDCO Input, GPO Output, unless otherwise specified at Ta = 25°C, VIN = 5.0V Parameter Symbol Ratings Conditions min Unit typ GPO Output current Igpo GPI = 0V, GPO = 1.5V GPO output voltage Low-level VOL GPI = 0V, IOL = 5mA 7.5 GPO output leakage current ILK GPO GPI/ENDCO input voltage High-level VINH Input High-level GPI, ENDCO 1.5 GPI/ENDCO input voltage Low-level VINL Input Low-level GPI, ENDCO 0 max 15 37.5 0.5 1 mA V 0 10 μA 0.3 V V Package Dimensions unit : mm (typ) 3384 Pd max -- Ta SIDE VIEW 2.0 BOTTOM VIEW 5.0 (3.4) (2.6) 0.63 6.4 4.4 12 1 2 0.15 0.3 0.8 1.7 MAX (0.5) Specified circuit board : 50.0 × 50.0 × 1.6mm3 2-layer glass epoxy board, Wiring density on the backside = 54% 1.50 1.5 1.0 0.60 0.5 0 --20 0 20 40 60 80 100 Ambient temperature, Ta -- °C 0.05 (1.5) SIDE VIEW Allowable power dissipation, Pd max -- W TOP VIEW SANYO : MFP12S(225mil) No.A1670-2/9 LV5072M Specified board for Pd max measurement PGND2 ENDCO VIN GPI GND BGR Pin Assignment 12 11 10 9 8 7 2 3 4 5 LX NC PVIN FB 6 GPO 1 PGND1 LV5072M Top view No.A1670-3/9 LV5072M GND 7 Vref 6 8 5 GPO FB (0.5V) GPI 9 5.0V + - Soft start 4 PVIN Cf = 1000pF BGR (1.25V) Block Diagram Thermal protection 10 VIN ENDCO 11 3 OSC PWM control NC Output control VOUT Soft start 2 LX 0.8V to 3.3V (2A) Current protection 12 PGND2 1 PGND1 Pin Descriptions Pin No. 1 Pin name PGND1 Description DC/DC power-dedicated ground 2 LX Switching regulator PWM output pin 3 NC NC 4 PVIN DC/DC power dedicated power pin 5 FB DC/DC feedback voltage input pin 6 GPO GPO output for discharging the output capacitor 7 BGR Internal reference voltage output pin 8 GND Signal ground 9 GPI GPO output control pin. L : Output capacitor discharge 10 VIN Signal system power supply 11 ENDCO DC/DC output control pin. Low : OFF, High : ON 12 PGND2 DC/DC power dedicated ground No.A1670-4/9 LV5072M Pin Functions Pin No. 2 Pin Name LX Pin function Equivalent Circuit Switching regulator PVIN PWM signal output LX PGND 5 FB Switching regulator Feedback voltage input VIN FB 1kΩ GND 6 GPO GPO output for discharging the output GPO capacitor 100Ω GND 7 BGR Reference voltage output VIN BGR 1.5kΩ GND Continued on next page. No.A1670-5/9 LV5072M Continued from preceding page. Pin No. 9 Pin Name GPI Pin function GP0 output control pin (Low : Discharging the output capacitor) Equivalent Circuit VIN 10kΩ 500kΩ GPI GND ENDCO DC/DC on/off control VIN (High : Converter ON) ENDCO 10kΩ 500kΩ 11 GND No.A1670-6/9 LV5072M Evaluation Board Efficiency -- Load current 100 Efficiency -- Load current Efficiency VOUT = 2.5V 90 Efficiency -- % V IN = 5V 90 Efficiency -- % 100 Efficiency VOUT = 3.3V 80 70 60 V IN 80 70 2 5 7 100 3 2 3 5 7 1000 2 3 50 10 5 710000 2 3 Load current, IOUT -- mA 5 7 100 100 Efficiency VOUT = 1.8V 3 5 7 1000 2 3 5 710000 3 5 710000 3 5 710000 Efficiency -- Load current Efficiency VOUT = 1.8V 90 90 V 70 V IN 80 =3 5V VI 80 .3V Efficiency -- % N = 3 3. 5V Efficiency -- % 2 Load current, IOUT -- mA Efficiency -- Load current 100 70 60 60 50 10 2 3 5 7 100 2 3 5 7 1000 2 3 5 50 10 710000 2 3 Load current, IOUT -- mA 5 7 100 2 3 5 7 1000 2 Load current, IOUT -- mA Efficiency -- Load current 100 100 Efficiency VOUT = 1.2V Efficiency -- Load current Efficiency VOUT = 1V 90 90 .3V 80 V IN Efficiency -- % Efficiency -- % 5V 60 50 10 =3 5V 70 60 .3V 80 V IN =3 5V 70 60 50 10 2 3 5 7 100 2 3 5 7 1000 2 3 50 10 5 710000 Load current, IOUT -- mA Load Regulation (VIN = 5V VOUT = 1.8V) 1.825 1.800 1.775 1.750 0 500 1000 1500 Load current, IOUT -- mA 2000 2 3 5 7 100 2 3 5 7 1000 2 Load current, IOUT -- mA 2 Output voltage, VOUT -- V 1.850 Output voltage, VOUT -- V = Current Limit (VOUT = 1.8V) 1.5 1 0.5 0 0 500 1000 1500 2000 2500 3000 Load current, IOUT -- mA No.A1670-7/9 LV5072M ENDCO Turn ON 3.0 Ta -- FB (VOUT = 1.8V, IO = 10mA) 0.510 FB voltage, VFB -- V Output voltage, VOUT -- V 2.5 2.0 1.5 1.0 0.505 0.500 0.495 0.5 0 0 0.5 1.0 1.5 0.490 --20 2.0 VEN -- V 20 40 60 80 85 Ambient temperature, Ta -- C Ta -- VOUT (VOUT = 1.8V, IO = 10mA) 1.850 Output voltage, VOUT -- V 0 1.825 1.800 1.775 1.750 --20 0 20 40 60 80 85 Ambient temperature, Ta -- C Load Transient Response 1 (IO = 10mA 1.9 1A) Load Transient Response 2 (IO = 10mA 1.9 1.85 1.75 1.7 1 0 0 100 200 300 400 --1 500 IO -- A 2 1.8 1.75 1.7 2 1 0 0 100 200 300 400 IO -- A 1.8 Output voltage, VOUT -- V 1.85 Output voltage, VOUT -- V 2A) --1 500 No.A1670-8/9 LV5072M ENDCO ON Waveforms. (VOUT = 1.8V, Co = 22μF, Cvin = 1μF, Cpvin = 10μF × 3, CBGR = 0.22μF) Startup waveform No load Startup waveform IO = 2A 500μS/div 1 500μS/div 1 5ms 5.0V 1ch ENDCO 5V/div 2 5ms 1.00V 3 5ms 1.00V 2ch BGR 1V/div 2 3ch VOUT 1V/div 3 4ch IIN 100mA/div 4 5ms 5.0V 5ms 100mA 1ch ENDCO 5V/div 2ch BGR 1V/div 5ms 1.00V 3ch VOUT 1V/div 5ms 1.00V 4ch IIN 500mA/div 4 5ms 0.50A 10ms/s Stop waveform No load 10ms/s Stop waveform IO = 2A 2mS/div 1 500μS/div 1 2ms 5.0V 1ch ENDCO 5V/div 2 2ms 1.00V 3 2ms 1.00V 4 5ms 5.0V 2ch BGR 1V/div 2 3ch VOUT 1V/div 3 4ch IIN 100mA/div 4 2ms 100mA 5ms 1.00V 5ms 1.00V 1ch ENDCO 5V/div 2ch BGR 1V/div 3ch VOUT 1V/div 4ch IIN 500mA/div 5ms 0.50A 2.5ms/s 10ms/s 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 March, 2010. Specifications and information herein are subject to change without notice. PS No.A1670-9/9