LV5744V

Ordering number : ENA1241 Bi-CMOS LSI LV5744V Overview 2-channel Step-down Switching Regulator The LV5744V is a 2-channel step-down switching regulator. Features • Provides dual switching regulator control circuits integrated on the chip. • Output-stage push-pull structure enabling high efficient operation. • Provides power supply (VCC-5V) for protecting the external P channel MOS gate. • Built-in timer latch type SCP (short-circuit protection circuit) • Built-in UVLO (Low voltage malfunction prevention circuit) • Built-in reference voltage circuit • Max_On_Duty is adjustable. Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Output voltage Allowable power dissipation Operating temperature Storage temperature Allowable pin voltage 1 CT, NON1, NON2, INV1, INV2, FB1, FB2, DT1, DT2, SCP, VREF 2 3 VCC-5V GND, OUT1, OUT2, VCC * : Specified board : 114.3×76.1×1.6mm3, glass epoxy board 30 35 V V 7 V Symbol VCC max VO max Pd max Topr Tstg Mounted on a specified board * Conditions Ratings 35 33 0.74 -40 to +85 -55 to +150 Unit V V W °C °C Any and all SANYO Semiconductor products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO Semiconductor representative nearest you before using any SANYO Semiconductor products described or contained herein in such applications. SANYO Semiconductor 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 products described or contained herein. 60408 MS 20080423-S00009 No.A1241-1/6 LV5744V Allowable Operating Ratings at Ta = 25°C Parameter Supply voltage Error amplifier input voltage Timing capacitance Oscillation frequency Symbol VCC VIN CCT FCT Conditions Ratings 8 to 33 0 to 3.3 50 to 5000 20k to 1M Unit V V pF Hz Electrical Characteristics at Ta = 25°C, VCC = 12V Parameter Reference voltage block Output voltage Input stability Load stability VIN-5V supply voltage Triangular wave oscillator block Oscillation frequency Frequency fluctuation Protection circuit block Threshold voltage Standby voltage Latch voltage Source current Comparator threshold voltage Quiescent time adjustment circuit block Input threshold voltage (fosc = 20kHz) Input bias current Vt0 Vt100 IBDT Duty cycle = 0% Duty cycle = 100% DT1, DT2 = 0V 0.45 0.95 0.5 1.0 0.1 0.55 1.05 1 V V µA VIT VSTB VLT ISCP VCT 1.6 1.4 1.5 1.7 50 30 2.1 1.5 1.9 100 100 2.6 1.6 V mV mV µA V FOSC FDV CCT = 220pF VCC = 8 to 33V 320 400 1 480 kHz % Vref VDLI VDLO VN5 Iref = 1mA VCC = 8 to 33V Iref = 0 to 5mA IOUT = -5mA VCC-5.5 2.4948 2.520 1 1 VCC-5.0 2.5452 10 10 VCC-4.5 V mV mV V Symbol Conditions min Ratings typ max Unit Low voltage malfunction prevention circuit block Threshold voltage Error amplifier Input offset voltage Input offset current Input bias current Open gain Common mode input voltage range Common mode rejection ratio Maximum output voltage Minimum output voltage Output sink current Output source current PWM comparator Input threshold voltage (fosc = 20kHz) Output block Output stage on resistance (upper) Output stage on resistance (lower) Overall device characteristics Standby current ICCS When output is off 10 mA RONH RONL 7 2 Ω Ω Vt0 Vt100 Duty cycle = 0% Duty cycle = 100% 0.45 0.95 0.5 1.0 0.55 1.05 V V VIO IIO IIB AV VOM CMRR VOH VOL IOI IOO FB = 1.25V FB = 1.25V VCC = 8 to 33V 0 80 2.6 0.2 1 85 0.4 15 85 3.3 6 30 100 mV nA nA dB V dB V V mA µA VUT 6.5 7 7.5 V No.A1241-2/8 LV5744V Package Dimensions unit : mm (typ) 3178B 0.9 Pd max -- Ta Specified board : 114.3×76.1×1.6mm3 glass epoxy Allowable power dissipation, Pd max -- W 5.2 16 9 0.8 0.74 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -40 4.4 6.4 0.38 1 0.65 (0.33) 8 0.15 0.22 1.5max 0.5 -20 0 20 40 60 8085 100 Ambient temperature, Ta -- °C SANYO : SSOP16(225mil) Pin Assignment 0.1 (1.3) CT 1 16 VREF GND 2 15 SCP NON1 3 14 NON2 LV5744 INV1 4 13 INV2 FB1 5 12 FB2 DT1 6 11 DT2 OUT1 7 10 OUT2 VCC-5V 8 9 VCC Top view No.A1241-3/8 LV5744V Pin Function Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin Name CT GND NON1 INV1 FB1 DT1 OUT1 VCC-5V VCC OUT2 DT2 FB2 INV2 NON2 SCP VREF External timing capacitor connection pin Ground Error amplifier 1 input (+) Error amplifier 1 input (-) Error amplifier 1 output Output 1 maximum duty setting Output 1 Power supply for output stage drive Power supply Output 2 Output 2 maximum duty setting Error amplifier 2 input (+) Error amplifier 2 input (-) Error amplifier 2 output Timer latch setting Reference voltage output Description Block Diagram VCC Vref Vref CT REFERENCE VOLTAGE TRIANGLE OSCILLATOR + + OUT1 PWM Comp1 NON1 INV1 FB1 + - Err Amp1 + + - SCP Comp NON2 INV2 FB2 + - Err Amp2 Vref + + OUT2 PWM Comp2 SCP S R TIMER LATCH R UVLO REGULATOR DT1 DT2 GND VCC-5V No.A1241-4/8 LV5744V Timing Chart VCC UVLO release voltage VREG NON VOUT UVLO signal ESD NON 1kΩ VREF R1 R2 C1 * The voltage at the NON pin is {VREF/(R1+1k)} × 1k in UVLO mode. No.A1241-5/8 LV5744V Application Circuit Example C21 R22 R21 F1 VCC C7 R12 R10 R13 R15 C10 R18 C14 R11 C6 C8 R16 C9 R22 L2 R9 VREF 16 SCP 15 NON2 14 INV2 13 R14 DT2 11 FB2 12 OUT2 10 VCC 9 C18 C19 D2 C15 PGND SGND PS No.A1241-6/6 Q2 8 VCC-5V LV5744V 3 NON1 7 OUT1 4 INV1 2 GND 6 DT1 5 FB1 1 CT C11 C12 R17 L1 R3 R5 C3 R6 C16 C1 C2 R4 R2 R1 R8 R20 R19 C20 Specifications of any and all SANYO Semiconductor 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. SANYO Semiconductor Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or 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 products (including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. 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Specifications and information herein are subject to change without notice. C4 R7 C5 C17 D1 C13 Q1