Ordering number : ENA1849 Bi-CMOS IC LV5990M Low power consumption and high efficiency Step-down Switching Regulator Overview LV5990M is 1ch DC-DC converter with built-in power Pch MOS transistor. The recommended operating range is 4.5V to 18V. The maximum current is 3A. The operating current is about 90μA, and low power consumption is achieved. Functions • 1ch SBD rectification DC-DC converter IC with built-in power Pch MOS transistor • Maximum value of light load mode current is 90μA. • 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 is 360kHz. • UVLO and built-in TSD Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Input voltage VIN-max 22 V Allowable pin voltage SW 30 V VIN V EN, PG PDR VIN -6 V REF 6 V REF V SS,FB,COMP C-HICCUP Allowable power dissipation Pd max 1.05 W Operating temperature Topr specified substrate * -40 to 85 °C Storage temperature Tstg -55 to 150 °C * Specified board: 40.0mm × 30.0mm ×1.6mm, glass epoxy. 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O1310 SY 20100929-S00006 No.A1849-1/6 LV5990M Recommended Operating Conditions at Ta = 25°C Parameter Input voltage renge Symbol Conditions Ratings VIN Unit 4.5 to 18 V Electrical Characteristics at Ta = 25°C, VIN = 15V Parameter Symbol Conditions Ratings min typ Unit max Reference voltage 1.235 1.260 1.285 V VCC-5.5 VCC-5.0 VCC-4.5 V FOSC 300 360 420 kHz IC startup voltage (EN pin) VCNT_ON 1.5 VIN V Disable voltage (EN pin) VCNT_OFF 0.3 V Internal reference voltage VREF Pch drive voltage VPDR IOUT=0 to -5mA Saw wave oscillator Oscillatory frequency ON/OFF circuit Soft start circuit Soft start source current ISS_SC EN>1.5V 1.3 2 3 μA Soft start sink current ISS_SK EN<0.3V, SS=0.4V 120 150 180 μA UVLO release voltage VUVLON FB=COMP 3.0 3.4 3.8 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 IEA_OSC FB=0.75V 10 20 40 μA 3.2 4.7 6.2 Over current limit circuit Current limit peak ICL HICCUP timer start-up cycle NLCYCLES HICCUP comparator threshold voltage VtHIC HICCUP timer charge current IHIC 15 A cycle 1.20 1.26 1.32 V 1 2 3 μA PWM comparator Maximum on-duty 95 DMAX % Logic output Ipwrgd_L PG=5V 4 5 6 mA Power good “H” leakage current Ipwrgd_H PG=5V Power good threshold FB voltage 1 μA VtPG 1.0 1.1 1.2 V Power good hysteresis VPG_H 40 50 60 mV Power good impedance RPG Power good “L” sink current 1 kΩ 150 mΩ Output Output on-resistance RON IO=1A The entire device Standby current ICCS EN<0.3V Light load mode consumption current Isleep1 EN>1.5V, ILOAD=0, No oscillatory Thermal shutdown TSD 50 70 1 μA 90 μA -20°C≤Ta≤70°C * * 170 °C *: Design certification No.A1849-2/6 LV5990M Pin Assignment SW 1 12 VIN PDR 2 11 EN GND 3 10 PG LV5990M NC 4 9 REF C-HICCUP 5 8 FB SS 6 7 COMP Top view Package Dimensions unit : mm (typ) 3403 2 0.15 0.3 0.8 Mounted on a specified board: 40.0×30.0×1.6mm3 glass epoxy 1.05 1.0 0.55 0.5 0 -40 -20 0 20 40 60 80 100 Ambient temperature, Ta -- C 0.1 (1.5) 1.7 MAX (0.5) Allowable power dissipation, Pd max -- W 0.63 6.4 4.4 12 1 Pd max -- Ta 1.5 5.0 SANYO : MFP12SJ(225mil) No.A1849-3/6 LV5990M Block Diagram VIN Wake-up EN Band-gap TSD Bias 1.26V enable uvlo.comp REF REF Pch Drive PDR pwm comp C-HICCUP HICCUP.comp 15pluse counter PbyP.comp COMP SS FB error.amp PG slope S Q R Q clk OSC PG.comp Level-shift SW PDR Init.comp gnd GND Application Circuit EN C-HICCUP VFB COMP SS FB PG VIN VIN=4.5V to 18V REF PDR SW VOUT VFB GND No.A1849-4/6 LV5990M Pin Function Pin No. 1 Pin name SW Function Equivalent circuit High-side Pch MOSFET drain pin VIN SW 2 PDR Pch MOSFET gate drive voltage VIN The bypass capacitor is necessarily connected between this pin and VIN. PDR GND 3 GND Ground pin. VIN Ground pin voltage is reference voltage. 12 VIN Supply voltage pin. GND It is observed by the UVLO function. When its voltage becomes 3.4V or more. ICs startup in soft start. 5 C-HICCUP It is capacitor connection pin for setting re-startup cycle in VIN HICCUP mode. If connect it to GND pin, then latch-off when over current. C-HICCUP GND 6 SS Capacitor connection pin for soft start. About 2μA current charges the soft start capacitor. VIN SS GND 7 COMP Error amplifier output pin. The phase compensation network is connected between GND pin VIN and COMP pin. COMP GND 8 FB Error amplifier reverse input pin. ICs make its voltage keep 1.26V. VIN Output voltage is divided by external resistances and it across FB. FB GND Continued on next page. No.A1849-5/6 LV5990M Continued from preceding page. Pin No. 9 Pin name REF Function Reference voltage Equivalent circuit VIN REF GND 10 PG Power good pin. PG Connect to open drain of MOS-FET in ICs inside. Setting output voltage to “L”, when FB voltage is 1.05V or less. GND 11 EN ON/OFF pin. VIN EN 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. 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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 October, 2010. Specifications and information herein are subject to change without notice. PS No.A1849-6/6