UNISONIC TECHNOLOGIES CO., LTD P1596 LINEAR INTEGRATED CIRCUIT 150KHZ, 1.5A PWM BUCK DC/DC CONVERTER 1 DESCRIPTION 1 TO-220B 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, 12V and an adjustable output version. FEATURES * 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 24V * Low power standby mode * High efficiency * Internal current and thermal limit * Built-in switching transistor on chip 1 HSOP-8 TO-263-5 ORDERING INFORMATION Ordering Number Lead Free Halogen Free P1596L-xx-TA5-T P1596G-xx-TA5-T P1596L-xx-TB5-T P1596G-xx-TB5-T P1596L-xx-SH2-R P1596G-xx-SH2-R P1596L-xx-TQ5-T P1596G-xx-TQ5-T P1596L-xx-TQ5-R P1596G-xx-TQ5-R Note: xx: Output Voltage, refer to Marking Information. www.unisonic.com.tw Copyright © 2014 Unisonic Technologies Co., Ltd Package Packing TO-220-5 TO-220B HSOP-8 TO-263-5 TO-263-5 Tube Tube Tape Reel Tube Tape Reel 1 of 7 QW-R103-027.L P1596 LINEAR INTEGRATED CIRCUIT MARKING INFORMATION PACKAGE VOLTAGE CODE MARKING TO-220-5 TO-220B TO-263-5 25:2.5V 33:3.3V 50:5.0V 12:12V AD:ADJ HSOP-8 PIN CONFIGURATION PIN DESCRIPTIONS PIN NO. PIN NAME DESCRITION FOR TO-220-5, TO-220B, TO-263-5 1 VIN Operating voltage input 2 SW Switching output 3 GND Ground 4 FB Feedback voltage 5 EN ON/OFF shutdown FOR HSOP-8 PIN NO. PIN NAME DESCRITION 1 VIN Operating voltage input 2 SW Switching output 3 FB Feedback input 4 EN Enable pin 5, 6, 7, 8 GND Ground UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 7 QW-R103-027.L P1596 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 7 QW-R103-027.L P1596 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Maximum Supply Voltage VCC 28 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 Operating Temperature TOPR -40 ~ +125 °С Storage Temperature TSTG -65 ~ +150 °С 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. THERMAL DATA PARAMETER TO-220B/TO-220-5 Junction to Case HSOP-8 TO-263-5 SYMBOL θJC RATINGS 3 45 4 UNIT °С/W ELECTRICAL CHARACTERISTICS (TJ=25°С, VIN=12V for the 2.5V 3.3V, 5V, and Adjustable version and VIN=24V for the 12V version, ILOAD=500mA.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT 2.5V 3.8V≦VIN≦24V, 0.2A≦ILOAD≦1.5A 2.4 2.5 2.6 V 3.3V 4.75V≦VIN≦24V, 0.2A≦ILOAD≦1.5A 3.168 3.3 3.432 V Output Voltage VOUT 5.0V 7V≦VIN≦24V, 0.2A≦ILOAD≦1.5A 4.8 5.0 5.2 V 12V 15V≦VIN≦24V, 0.2A≦ILOAD≦1.5A 11.52 12 12.48 V 73 % VIN=12V, ILOAD=1.5A 2.5V 3.3V VIN=12V, ILOAD=1.5A 73 % Efficiency η 5.0V VIN=12V, ILOAD=1.5A 80 % 12V VIN=24V, ILOAD=1.5A 72 % UTC P1596-ADJ 4.75V≦VIN≦24V, 0.2A≦ILOAD≦1.5A 1.193 1.23 1.267 V Output Feedback VFB VOUT Programmed for 3V Efficiency η VIN=12V, ILOAD=1.5A 78 % ALL OUTPUT VOLTAGE Feedback Bias Current IBIAS Adjustable Version Only, VFB=1.3V -10 -50 nA Oscillator Frequency fOSC (Note 1) 127 150 173 KHz Saturation Voltage VSAT IOUT=2A (Note 2, 3) 1.25 1.4 V Max Duty Cycle (ON) (Note 3) 100 DC % Min Duty Cycle (OFF) (Note 4) 0 Current Limit ICL Peak Current (Notes 2, 3) 1.8 2.25 3.45 A Output=0V (Notes 2, 4) -200 A Output Leakage Current IL Output=-1V, VIN = 24V -5 mA Quiescent Current IQ (Note 4) 5 10 mA Standby Quiescent Current ISTBY ON/OFF Pin=5V (OFF) , VIN = 24V 70 150 A Note 1: The switching frequency is reduced when the second stage current limit is activated. 2: No diode, inductor or capacitor connected to output pin. 3: Feedback pin removed from output and connected to 0V to force the output transistor switch ON. 4: Feedback pin removed from output and connected to 12V for the 2.5V 3.3V, 5V, and the ADJ. version, and 15V for the 12V version, to force the output transistor switch OFF. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 7 QW-R103-027.L P1596 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION FOR ADJUSTABLE OUTPUT VOLTAGE VERSION VOUT×(R1/(R1+ R2))=VREF VOUT = VREF(1+ R2/R1) Where VREF=1.23V R2=R1((VOUT / VREF)-1) FOR FIXED OUTPUT VOLTAGE VERSIONS FOR HSOP-8 FIXED OUTPUT VOLTAGE VERSIONS UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 7 QW-R103-027.L P1596 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS Efficiency v.s. Temperature (VIN=12V, VOUT=3.3V, IOUT=1.5A) 3.4 82 3.35 81 3.3 80 Efficiency (%) VOUT (V) Output Voltage v.s. Temperature (VIN=12V, IOUT=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 Temperature, TA (°С) -10 10 30 50 70 90 110 130 Temperature, TA (°С) Switch Current Limit v.s. Temperature (VCC=12V, VFB=0V) Saturation Voltage v.s. Temperature (VCC=12V, VFB=0V, VSD=0) 1.5 3.5 Switch Current Limit (A) Saturation Voltage (V) 1.4 1.3 1.5A 1.2 1.1 1A 1 0.9 0.5A 3 2.5 0.8 0.7 -50 -25 0 25 50 75 100 2 125 Temperature, TA (°С) -10 10 30 50 70 90 Supply Current v.s. Temperature (VCC=12V, No Load, VON/OFF=5V,(Switch OFF)) 13 60 12 55 11 Supply Current (uA) Supply Current (mA) -30 Temperature, TA (°С) Supply Current v.s. Temperature (VCC=12V, No Load, VON/OFF=0V,(Switch ON)) 10 9 8 Switch ON 7 50 45 Switch OFF 40 35 6 5 -50 -50 -30 -10 10 30 50 70 90 110 130 Temperature, TA (°С) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 30 -50 -30 -10 10 30 50 70 90 110 130 150 Temperature, TA (°С) 6 of 7 QW-R103-027.L P1596 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS (Cont.) 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 7 of 7 QW-R103-027.L