UNISONIC TECHNOLOGIES CO., P3596 LINEAR INTEGRATED CIRCUIT 150KHZ, 3A PWM STEP-DOWN DC/DC CONVERTER 1 DESCRIPTION TO-220B The UTC P3596 series is a step-down switching regulator able to provide 3A output current. The available output voltages are 3.3V, 5V, 12V, and an adjustable output version. 1 TO-220-5 FEATURES *Output load current: 3A *Adjustable version output voltage range, 1.23V ~ 37V±4% *Operating voltage can be up to 40V (Vin->40V) *Low power standby mode *High efficiency *Internal current and thermal limit 1 TO-263-5 1 TO-252-5 *Pb-free plating product number:P3596L PIN DESCRIPTION PIN NO. 1 2 3 4 5 PIN NAME DESCRIPTION Operating voltage input Output Switching output GND Circuit Ground Output voltage FB (Feedback) feedback control SD (Shutdown) ON/OFF shutdown VIN ORDERING INFORMATION P3596□－□－□－□ (1) (2) (3) (4) (1) Plating Type Code Pb/Sn Pb-Free L (2) Output Voltage Vout Code 12V 12 5.0V 50 3.3V 33 3.0V 30 Adj AD www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., (3) Package Type Code TO-252-5 TN5 TO-220-5 TA5 TO-220B TB5 TO-263-5 TQ5 (4) Packing Type Code Tape Reel R Tube T Tube T Tape Reel R 1 QW-R103-023,B P3596 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM ON / OFF VIN Current Source bias 1.235V Reference 2.5V Regulator Start up + Comp Comp + + Amp - FB Frequency Compensation Comp + 3A Switch Pre-driver Output 150kHz OSC. Thermal Shutdown Gnd TYPICAL APPLICATION (Fixed Output Voltage Versions) FB 12V DC Input 4 Vin + UTC 2 P3596 -5.0V 1 on / off Inductor + Gnd UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5.0V/3A Output Load L1 3 5 Cin Capacitor Output D1 Schottky Diode Co Capacitor 2 QW-R103-023,B P3596 LINEAR INTEGRATED CIRCUIT ADJUSTABLE OUTPUT VOLTAGE VERSIONS CFF R1 1k +VIN + 1 UNREGULATED DC INPUT + CIN LOCATE THE PROGRAMMING RESISTORS NEAR THE FEEDBACK PIN USING SHORT LEADS R2 KEEP FEEDBACK WIRING AWAY FROM INDUCTOR FLUX 4 FEEDBACK UTC P3596ADJ 3 GND 5 REGULATED OUTPUT OUTPUT L1 D1 2 ON/OFF + COUT L O A D HEAVY LINES MUST BE KEPT SHORT AND USE GROUND PLANE CONSTRUCTION FOR BEST RESULTS Vout×( R1 ) = Vref R1 + R2 R2 Vout = Vref (1+ ) R1 Where Vref = 1.23V Vout R2 = R1( -1) Vref ABSOLUTE MAXIMUM RATINGS PARAMETER Maximum Supply Voltage Operating Voltage ON/OFF Pin Input Voltage Feedback Pin Voltage Output Voltage to Ground (Steady State) Power Dissipation Maximum Junction Temperature Temperature Range Storage Temperature Range SYMBOL VCC VOPR VON/OFF VFB VOUT PD TJ TOPR TSTG RATINGS 45 4.5 ~ 40 -0.3 ~ +25 -0.3 ~ +25 -1 Internally limited +150 -40 ~ +125 -40 ~ +150 UNIT V V V V V mW ℃ ℃ ℃ RATINGS 3 3 4 8 45 45 55 90 UNIT THERMAL DATA PARAMETER Thermal Resistance Junction to Case Thermal Resistance Junction to Ambient SYMBOL TO-220B TO-220-5 TO-263-5 TO-252-5 TO-220B TO-220-5 TO-263-5 TO-252-5 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw θJc θJA ℃/W ℃/W 3 QW-R103-023,B P3596 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Tj=25℃, VIN=12V for the 3.3V, 5V, and Adjustable version and VIN=24V for the 12V version, ILOAD=500mA.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT 4.75V≦VIN≦40V, 0.2A≦ILOAD≦3A 3.3V 3.168 3.3 3.432 V Output Voltage VOUT 7V≦VIN≦40V, 0.2A≦ILOAD≦3A 5.0V 4.8 5.0 5.2 V 15V≦VIN≦40V, 0.2A≦ILOAD≦3A 12V 11.52 12.0 12.48 V 3.3V Efficiency 73 % VIN=12V, ILOAD=3A η 5.0V 80 % VIN=12V, ILOAD=3A 12V 90 % VIN=25V, ILOAD=3A UTC P3596-ADJ 4.5V≦VIN≦40V, 0.2A≦ILOAD≦3A 1.193 1.230 1.267 V Feedback Voltage VFB VOUT programmed for 3V η Efficiency VIN=12V, VOUT=3V, ILOAD=3A 73 % ALL OUTPUT VOLTAGE Feedback Bias Current Ib Adjustable Version Only, VFB=1.3V 10 50 nA Oscillator Frequency fo (Note 1) 127 150 173 kHz Saturation Voltage VSAT IOUT=3A (Note 2, 3) 1.16 1.4 V (Note 3) 100 Max Duty Cycle (ON) DC % (Note 4) 0 Min Duty Cycle (OFF) Current Limit ICL Peak Current (Notes 2, 3) 3.6 4.5 6.9 A μA Output=0V (Notes 2, 4) 50 Output Leakage Current IL Output=-1V (Note 5) 2 30 mA Quiescent Current IQ (Note 4) 5 10 mA μA Standby Quiescent Current ISTBY ON/OFF pin=5V (OFF) (Note 5) 80 200 ON/OFF CONTROL ON/OFF Pin Logic Input VIH Low (Regulator ON) 1.3 0.6 V Threshold Voltage VIL High (Regulator OFF) 2.0 1.3 μA ON/OFF Pin Input Current IH VLOGIC=2.5V (Regulator OFF) 5 15 μA IL VLOGIC=0.5V (Regulator ON) 0.02 5 Note 1: The switching frequency is reduced when the second stage current limit is activated. Note 2: No diode, inductor or capacitor connected to output pin. Note 3: Feedback pin removed from output and connected to 0V to force the output transistor switch ON. Note 4: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version, and 15V for the 12V version, to force the output transistor switch OFF. Note 5: VIN = 40V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 QW-R103-023,B P3596 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS Line Regulation Normalized Output Voltage 5.15 5.05 5.00 4.95 Vout=5V, I LOAD=100mA Normalized at TJ=25℃ 5.10 OUTPUT VOLTAGE (V) 5.10 OUTPUT VOLTAGE (V) 5.15 VIN =20V, I LOAD=3A Normali ed at TJ=25℃ 5.05 5.00 4.95 4.90 4.90 4.85 4.85 -50 -25 25 0 50 75 100 125 0 10 5 15 35 40 1.60 3A Load 85 1.40 5.0V SATURATION VOLTAGE (V) EFFICIENCY (%) 30 Switch Saturation Voltage Efficiency 80 75 3.3V 70 65 1 : -40 ℃ 2 : 25 ℃ 3 : 125℃ 1.20 1.00 1 2 0.80 3 0.60 60 0 5 10 15 20 25 30 35 0 40 0.5 1 Operating Quiescent Current Switch Current Limit 30.0 5.00 3 2 SWITCH CURRENT(A) INPUT VOLTAGE (V) 4.5V< VIN < 4.0V I SWITCH =0 VIN =12V, VOUT =5V 4.75 SUPPLY CURRENT (mA) SWITCH CURRENT LIMIT (A) 25 INPUT VOLTAGE (V) JUNCTION TEMPERATURE (℃) 90 20 4.50 4.25 4.00 25.0 20.0 Switch ON 15.0 10.0 Switch OFF 5.00 3.75 0.00 3.50 -50 -25 0 25 50 75 100 125 JUNCTION TEMPERATURE (℃) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw -50 -25 0 25 50 75 100 125 JUNCTION TEMPERATURE (℃) 5 QW-R103-023,B P3596 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS (cont.) Shutdown Quiescent Current Minimum Operating Supply Voltage 200 6.0 SUPPLY VOLTAGE (V) 160 CURRENT (uA) VOUT=1.23V I LOAD=200mA VON/OFF=5V 1 : -40℃ 2 : 25 ℃ 3 : 125 ℃ 120 80 1 2 3 40 4.0 3.0 2.0 1.0 00 0 5.0 10 5 15 20 25 30 35 0.0 -50 40 -25 25 0 50 75 100 125 24 25 JUNCTION TEMPERATURE (℃) SUPPLY VOLOTAGE (V) ON/OFF Threshold Voltage ON/OFF Pin Current (Sinking) 6.0 180 5.0 150 4.0 120 CURRENT (uA) THRESHOLD VOLTAGE (V) VIN=40V -40℃< TJ <125℃ OFF 3.0 2.0 1.0 90 60 30 ON 0.0 0.0 -50 -25 0 25 50 75 100 125 0.0 10 20 22 23 ON/OFF PIN VOLTAGE (V) JUNCTION TEMPERATURE (℃) Switch Frequency Feedback Pin Bias Current 300 60 VIN =20V, I LOAD =3A Normalized at TJ=25℃ 50 BIAS CURRENT (nA) 250 FREQUENCY (kHz) 15 200 150 100 50 40 30 20 Adjustable Version Only 10 0.0 0.0 -50 -25 0 25 50 75 100 125 JUNCTION TEMPERATURE (℃) -50 -25 0 25 50 75 125 100 JUNCTION TEMPERATURE (℃) UTC 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 UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 QW-R103-023,B