Ordering number : ENA1829A LV5061V Bi-CMOS IC Low power consumption and high efficiency Step-down Switching Regulator Controller http://onsemi.com Overview LV5061V is 1ch step-down switching regulator. The operation current is about 90μA, and low power consumption is achieved. Functions • 1ch SBD rectification controller IC • 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 can be set by the external pin. The oscillatory frequency is 300 kHz to 2.2MHz • Built-in UVLO, TSD Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Input voltage VIN max Allowable pin voltage PDR,HDRV,RSNS, Conditions Ratings Unit 22 V VIN V ILIM,EN,PG VIN-PDR 6 V REF 6 V REF V SS,FB,COMP, C-HICCUP,RT Allowable power dissipation Pd max Operating temperature Topr Storage temperature Tstg Specified substrate *1 0.74 W -40 to +85 ˚C -55 to +150 ˚C 3 *1: Specified substrate 114.3mm×76.1mm×1.6mm glass-epoxy Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Semiconductor Components Industries, LLC, 2013 August, 2013 O0610 SY/90810 SY 20100824-S00001 No.A1829-1/6 LV5061V Recommended Operating Conditions at Ta = 25°C Parameter Input voltage range Symbol Conditions Ratings VIN Unit 4.5 to 18 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 1.235 1.260 1.285 V VIN-5.5 VIN-5.0 VIN-4.5 V 280 330 380 kHz VIN V 0.3 V Saw wave oscillator Oscillatory frequency ON/OFF circuit IC start-up voltage VCNT_ON Disable voltage VCNT_OFF 1.5 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>1.5V, ILIM>RSNS 1.2 2.0 2.8 mA SS=4V at HICCUP UVLO circuit 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 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 +5 mV VIN-0.175 VIN V Over current limit circuit Reference current ILIM1 Over current detection VLIM_OFS comparator offset voltage RSNS pin input range VRSNS HICCUP timer start-up cycle NLCYCLES HICCUP comparator threshold VtHIC 15 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 Power good “H” leakage current IPWRGD_H PG=5V 4 5 6 mA 1 μA Power good threshold voltage VtPG 1.0 1.1 1.2 V Power good hysteresis VPG_H 40 50 60 mV Output Ω Output on-resistance (High) RONH 3 Output on-resistance (Low) RONL Output on-current (High) IONH 500 mA Output on-current (Low) IONL 500 mA Ω 3 The entire device Stand-by current ICCS EN<0.3V Light load mode consumption ISLEEP1 EN>1.5V, current Thermal shutdown 50 70 1 μA 90 μA No switching TSD *2 170 ˚C *2: Design certification No.A1829-2/6 LV5061V 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 REF + - Band-gap 16.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 R6 + + 15.FB 12.SS err.amp 3.ILIM + PbyP.comp + C7 VIN - 1.PG PG.comp + - C6 15pluse counter 1.1V 9,13.NC + - slope S Q R Q 6.HDRV Level-shift clk L PDR OSC C9 R4 D1 FB 10.RT R7 8.GND C2 R5 No.A1829-3/6 LV5061V Pin Assignment TOP VIEW PG 1 16 REF EN 2 15 FB ILIM 3 14 COMP VIN 4 RSNS 5 13 N.C. LV5061V HDRV 6 12 SS 11 C-HICCUP PDR 7 10 RT GND 8 9 N.C. 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. It is observed by the UVLO function. When its voltage becomes VIN 3.4V 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.A1829-4/6 LV5061V 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 NC 10 RT N.C. pin. Oscillation frequency setting pin. Resistor is connected between this pin and GND. VIN ILIM 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 14 COMP NC pin. 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)”. Continued on next page. No.A1829-5/6 LV5061V Continued from preceding page. Pin No. 15 Pin name FB Descriptions Error amplifier reverse input pin. ICs make its voltage keep 1.26V. Output voltage is divided by Equivalent circuit VIN external resistors and it across FB. FB GND 16 REF Reference voltage. VIN REF GND ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PS No.A1829-6/6