UNISONIC TECHNOLOGIES CO., LTD P1596 LINEAR INTEGRATED CIRCUIT 150KHZ, 1.5A PWM BUCK DC/DC CONVERTER 1 1 DESCRIPTION TO-220B-5 TO-220-5 The UTC P1596 series is a step-down switching regulator able to provide 1.5A output current. The available output voltages are 2.5V, 3.3V, 5V and an adjustable output version. 1 1 FEATURES TO-263-5 *Output load current: 1.5A *Adjustable version output voltage range, 1.23V ~ 18V±4% *150KHz ±15% fixed switching frequency *Voltage mode non-synchronous PWM control *Thermal-shutdown and current-limit protection *Operating voltage can be up to 22V *Low power standby mode *High efficiency *Internal current and thermal limit *Built-in switching transistor on chip TO-252-5 1 SIP-4 *Pb-free plating product number: P1596L ORDERING INFORMATION Order Number Normal Lead Free Plating P1596-xx-G04-K P1596L-xx-G04-K P1596-xx-TA5-T P1596L-xx-TA5-T P1596-xx-TB5-T P1596L-xx-TB5-T P1596-xx-TN5-R P1596L-xx-TN5-R P1596-xx-TN5-T P1596L-xx-TN5-T P1596-xx-TQ5-R P1596L-xx-TQ5-R P1596-xx-TQ5-T P1596L-xx-TQ5-T Note: xx: Output Voltage, refer to Marking Information. P1596L-xx-G04-K (1)Packing Type (2)Package Type (3)Output Voltage Code (4)Lead Plating www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., Ltd Package Packing SIP-4 TO-220-5 TO-220B TO-252-5 TO-252-5 TO-263-5 TO-263-5 Bulk Tube Tube Tape Reel Tube Tape Reel Tube (1) K: Bulk, R: Tape Reel, T:Tube (2) G04: SIP-4, TA5: TO-220-5, TB5: TO-220B, TN 5: TO-252-5, TQ5: TO-263-5 (3) xx: refer to Marking Information (4) L: Lead Free Plating, Blank: Pb/Sn 1 of 8 QW-R103-027,B P1596 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM ON / OFF VIN 220mV Current Source bias 1.235V Reference 2.5V Regulator 220mV Start up + Comp Comp + + Amp - FB Frequency Compensation Comp + Pre-driver 1.5A Switch OUTPUT 200kHz OSC. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Thermal Shutdown GND 2 of 8 QW-R103-027,B P1596 LINEAR INTEGRATED CIRCUIT PIN DESCRIPTIONS FOR 5-PIN 1 2 3 4 5 FOR 4-PIN 1 2 4 3 - PIN NAME VIN Output GND FB (Feedback) SD (Shutdown) DESCRITION Operating voltage input Switching output Circuit Ground Output voltage feedback control ON/OFF shutdown MARKING INFORMATION PACKAGE VOLTAGE CODE MARKING UTC P1596 SIP-4 TO-220-5 TO-220B TO-252-5 TO-263-5 Voltage Code 25:2.5V 33:3.3V 50:5.0V AD:ADJ Lead Plating Date Code 1 2 3 4 UTC P1596 Voltage Code Lead Plating Date Code 1 2 3 4 5 THERMAL DATA PARAMETER Thermal Resistance Junction to Case SYMBOL SIP-4 TO-220B TO-220-5 TO-252-5 TO-263-5 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw θJC RATINGS 30 3 3 8 4 UNIT ℃/W 3 of 8 QW-R103-027,B P1596 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Maximum Supply Voltage VCC 24 V Operating Voltage VOPR 4.5 ~ 22 V ON/OFF Pin Input Voltage VON/OFF -0.3 ~ +18 V Feedback Pin Voltage VFB -0.3 ~ +18 V Output Voltage to Ground (Steady State) VOUT -1 V Power Dissipation PD Internally limited W ℃ Temperature Range TOPR -40 ~ +125 ℃ Storage Temperature Range TSTG -65 ~ +150 Note Absolute maximum ratings are those values beyond which the device which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ELECTRICAL CHARACTERISTICS (TJ=25℃, VIN=12V for 2.5V, 3.3V, 5V, ADJ and VIN=18V for the 12V, ILOAD=0.5A, unless otherwise specified.) PARAMETER Output Voltage SYMBOL 2.5V 3.3V 5.0V 2.5V 3.3V 5.0V VOUT TEST CONDITIONS 3.8V≦VIN≦22V, 0.2A≦ILOAD≦1.5A 4.75V≦VIN≦22V, 0.2A≦ILOAD≦1.5A 7V≦VIN≦22V, 0.2A≦ILOAD≦1.5A η VIN=12V, ILOAD=1.5A VIN=12V, ILOAD=1.5A VIN=12V, ILOAD=1.5A Output Feedback VFB 4.75V≦VIN≦22V, 0.2A≦ILOAD≦1.5A VOUT Programmed for 3V Efficiency η VIN=12V, ILOAD=1.5A Efficiency MIN 2.4 3.168 4.8 TYP 2.5 3.3 5.0 73 73 80 MAX UNIT 2.6 V 3.432 V 5.2 V % % % 1.193 1.23 1.267 UTC P1596-ADJ ALL OUTPUT VOLTAGE Feedback Bias Current Oscillator Frequency IBIAS fOSC Saturation Voltage VSAT Max Duty Cycle Min DC Current Limit ILIMIT Output Leakage Current ILEAK Quiescent Current Standby Quiescent Current IQ ISTBY Adjustable Version Only, VFB=1.3V 127 IOUT=1.5A, No outside circuit VFB=0V force driver on VFB=0V force driver on Peak Current, No outside circuit VFB=0V force driver on Output=0V, No outside circuit VFB=12V force driver off Output=-1V, VIN=12V VFB=12V force driver off ON/OFF Pin=5V, VIN=22V % -10 150 -50 173 nA KHz 1.25 1.4 V 100 VFB=12V force driver off UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 78 V % 0 2 A -5 5 70 -200 µA 10 150 mA mA µA 4 of 8 QW-R103-027,B P1596 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION FOR ADJUSTABLE OUTPUT VOLTAGE VERSION For 5 PIN: CFF R1 1k +V IN + Unregulated DC Input Locate The Programming Resistors Near The Feedback Pin Using Short Leads R2 Keep Feedback Wiring Away From Inductor Flux 4 Feedback OUTPUT 1 + C IN Regulated Output UTC P1596 -ADJ L1 2 3 5 ON/OFF GND D1 + C OUT L O A D Heavy Lines Must be Kept Short and Use Ground Plane Construction for Best Results VOUT×(R1/(R1+ R2))=VREF VOUT = VREF(1+ R2/R1) Where VREF=1.23V R2=R1((VOUT / VREF)-1) For 4 PIN: R1 R2 FB 12V DC Input 3 VIN 1 + CIN Capacitor UTC P1596 -XX 2 OUTPUT Inductor 4 GND 3.3V/1.5A Output Load L1 + D1 Schottky Diode Co Capacitor VOUT=VFB×(1+R1/R2) VFB=1.23V R2=1K~3K UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 8 QW-R103-027,B P1596 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION FOR FIXED OUTPUT VOLTAGE VERSIONS For 5 PIN: FB 12V DC Input 4 VIN 1 UTC P1596 -XX 3 + 3.3V/1.5A Output Load L1 Inductor 5 GND C IN Capacitor 2 OUTPUT + SD Co Capacitor D1 Schottky Diode For 4 PIN: FB 12V DC Input 3 VIN 1 UTC P1596 -XX + C IN Capacitor 2 OUTPUT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Inductor 4 GND 3.3V/1.5A Output Load L1 + D1 Schottky Diode Co Capacitor 6 of 8 QW-R103-027,B P1596 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS Efficiency v.s. Temperature (VIN=12V, VOUT=3.3V, I OUT=1.5A) 3.4 82 3.35 81 3.3 80 Efficiency (%) VOUT (V) Output Voltage v.s. Temperature (VIN=12V, I OUT=1.5A) 3.25 3.2 3.15 79 78 77 3.1 76 3.05 75 3 -40 -20 0 20 40 60 74 80 100 120 140 -50 -30 -10 10 30 50 70 90 110 130 Temperature, Ta (℃) Temperature, Ta (℃) Saturation Voltage v.s. Temperature (VCC=12V, VFB=0V, VSD=0) Switch Current Limit v.s. Temperature (VCC=12V, VFB=0V) 1.5 Switch Current Limit (A) Saturation Voltage (V) 1.4 1.3 1.5A 1.2 1.1 1A 1 0.9 0.5A 3.5 3 2.5 0.8 0.7 13 -50 -25 0 25 50 75 2 100 125 -10 10 30 50 70 Supply Current v.s. Temperature (VCC=12V, No Load, VON/OFF=0V,(Switch ON)) Supply Current v.s. Temperature (VCC=12V, No Load, VON/OFF=5V,(Switch OFF)) 60 90 55 Supply Current (uA) Supply Current (mA) -30 Temperature, Ta (℃) 12 11 10 9 8 Switch ON 7 50 45 Switch OFF 40 35 6 5 -50 Temperature, Ta (℃) -50 -30 -10 10 30 50 70 90 110 130 Temperature, Ta (℃) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 30 -50 -30 -10 10 30 50 70 90 110 130 150 Temperature, Ta (℃) 7 of 8 QW-R103-027,B P1596 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS (Cont.) Feedback Current v.s. Temperature (VCC=12V, VOUT=5V, VFB =1.3V) 170 10 165 0 Feedback Current (nA) Frequency (KHz) Frequency v.s. Temperature (VCC=12V, IOUT=500mA, VOUT=5V) 160 155 150 145 140 -50 -30 -10 10 30 50 70 90 110 130 150 Temperature, Ta (℃) -10 -20 -30 -40 -50 -50 -30 -10 10 30 50 70 90 110 130 150 Temperature, Ta (℃) 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 8 of 8 QW-R103-027,B