UNISONIC TECHNOLOGIES CO., LTD P1696 LINEAR INTEGRATED CIRCUIT 150KHZ, 2A PWM STEP-DOWN DC/DC CONVERTER DESCRIPTION The UTC P1696 series is a step-down switching regulator able to provide 2A output current. The available output voltages are 2.5V 3.3V, 5V, 12V, and an adjustable output version. SOP-8 FEATURES *Output load current: 2A *Adjustable version output voltage range, 1.23V ~ 27.5V±4% *Operating voltage can be up to 30V (VIN->30V) *Low power standby mode *High efficiency *Internal current and thermal limit *Pb-free plating product number:P1696L ORDERING INFORMATION Order Number Normal Lead Free Plating P1696-xx-S08-R P1696L-xx-S08-R P1696-xx-S08-T P1696L-xx-S08-T P1696L-xx-S08-R (1)Packing Type (2)Package Type (3)Output Voltage Code (4)Lead Plating Package Packing SOP-8 SOP-8 Tape Reel Tube (1) R: Tape Reel, T: Tube (2) S08: SOP-8 (3) xx: 2 5 :2 . 5 V, 3 3 : 3 .3 V ,5 0 : 5 . 0 V, 1 2 :1 2 V ,AD :AD J (4) L: Lead Free Plating, Blank: Pb/Sn PIN DESCRIPTION PIN NO. 1 2 3 4 5,6,7,8 PIN NAME VIN Output FB (Feedback) SD (Shutdown) GND DESCRIPTION Operating voltage input Switching output Output voltage feedback control ON/OFF shutdown Circuit Ground www.unisonic.com.tw Copyright © 2006 Unisonic Technologies Co., Ltd 1 of 7 QW-R103-035,B P1696 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM ON / OFF VIN Current Source bias 1.235V Reference 2.5V Regulator Start up + Comp Comp + FB + Amp - Frequency Compensation Comp + Pre-driver 2A Switch Output 150kHz OSC. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Thermal Shutdown Gnd 2 of 7 QW-R103-035,B P1696 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Maximum Supply Voltage VCC 40 V Operating Voltage VOPR 3.8 ~ 30 V ON/OFF Pin Input Voltage VON/OFF -0.3 ~ +25 V Feedback Pin Voltage VFB -0.3 ~ +25 V Output Voltage to Ground (Steady State) VOUT -1 V Power Dissipation PD Internally limited mW Junction Temperature TJ +150 ℃ Operating Temperature TOPR -40 ~ +125 ℃ Storage Temperature TSTG -40 ~ +150 ℃ Note: Absolute maximum ratings are those values beyond 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 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≦30V, 0.2A≦ILOAD≦2A V 2.4 2.5 2.6 3.3V 4.75V≦VIN≦30V, 0.2A≦ILOAD≦2A 3.168 3.3 3.432 V Output Voltage VOUT 5.0V 7V≦VIN≦30V, 0.2A≦ILOAD≦2A 4.8 5.0 5.2 V 12V 15V≦VIN≦30V, 0.2A≦ILOAD≦2A 11.52 12.0 12.48 V 2.5V VIN=12V, ILOAD=2A % 73 3.3V VIN=12V, ILOAD=2A 75 % Efficiency η 5.0V VIN=12V, ILOAD=2A 80 % 12V 80 % VIN=25V, ILOAD=2A UTC P1696-ADJ 4.5V≦VIN≦30V, 0.2A≦ILOAD≦2A 1.19 1.230 1.267 V Feedback Voltage VFB VOUT programmed for 3V Efficiency η VIN=12V, VOUT=3V, ILOAD=2A % 75 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) 1.16 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) 2 A Output=0V (Notes 2, 4) µA 50 Output Leakage Current IL Output=-1V (Note 5) 2 30 mA Quiescent Current IQ (Note 4) 5 10 mA Standby Quiescent Current ISTBY ON/OFF pin=5V (OFF) (Note 5) 80 200 µA 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 V ON/OFF Pin Input Current IH VLOGIC=2.5V (Regulator OFF) 5 15 µA IL VLOGIC=0.5V (Regulator ON) 0.02 5 µA 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. 5: VIN = 30V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 7 QW-R103-035,B P1696 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION (Fixed Output Voltage Versions) FB 12V DC Input VIN 3 UTC P1696 -5.0V 1 5,6,7,8 Gnd 4 on / off + C IN Capacitor 2 5.0V/2A Output Load L1 Output Inductor + D1 Schottky Diode Co Capacitor ADJUSTABLE OUTPUT VOLTAGE VERSIONS CFF R1 1k + UNREGULATED + DC INPUT R2 Locate The Programming Resistors Near The Feedback Pin Using Short Leads Keep Feedback Wiring Away From Inductor Flux 3 Feedback +V IN P 1696-ADJ 1 5,6,7,8 GND 4 CIN Regulated Output Output 2 ON/OFF L1 D1 + COUT L O A D Heavy Lines Must be Kept Short and Use Ground Plane Construction for Best Results VOUT×( R1 R1 + R2 VOUT = VREF (1+ ) = VREF R2 R1 ) Where VREF = 1.23V R2 = R1( V OUT V REF -1) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 7 QW-R103-035,B P1696 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS Line Regulation Normalized Output Voltage 5.15 5.15 VIN=20V,LLOAD=2A Normalized at TJ=25 ℃ 5.10 5.05 Output Voltage (V) Output Voltage (V) VOUT=5V, I LOAD=100mA Normalized at TJ=25℃ 5.10 5.00 4.95 5.05 5.00 4.95 4.90 4.90 4.85 4.85 -50 -25 25 0 50 75 100 125 0 5 10 Junction Temperature (℃) 20 25 30 Input Voltage (V) Switch Saturation Voltage Efficiency 90 15 1.60 2A Load 85 1.40 1 : -40 ℃ 2 : 25 ℃ 3 : 125℃ 5.0V Saturation Voltage (V) Efficiency (%) 80 75 3.3V 70 1.20 1.00 1 2 0.80 65 3 0.60 60 0 5 10 15 20 25 0 30 0.5 1 Input Voltage (V) Switch Current Limit Operating Quiescent Current 30.0 5.00 4.5V< VIN < 30V ISWITCH =0 VIN =12V, VOUT =5V 25.0 4.75 4.50 Supply Current (mA) Switch Current Limit (A) 3 2 Switch Current(A) 4.25 4.00 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 of 7 QW-R103-035,B P1696 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS(Cont.) Shutdown Quiescent Current Minimum Operating Supply Voltage 6.0 200 5.0 Supply Voltage (V) 160 Current (uA) VOUT=1.23V ILOAD =200mA VON/OFF =5V 1 : -40℃ 2 : 25 ℃ 3 : 125 ℃ 120 80 1 2 3 40 3.0 2.0 1.0 0.0 -50 00 0 4.0 10 5 15 20 25 30 -25 25 0 50 75 100 125 24 25 100 125 Juntion Temperature (℃) Supply Voltage (V) ON/OFF Threshold Voltage ON/OFF Pin Current (Sinking) 180 6.0 5.0 150 4.0 120 Current (uA) Threshold Voltage (V) VIN =40V -40℃< TJ <125℃ OFF 3.0 90 60 2.0 30 1.0 ON 0.0 0.0 -50 -25 0 25 50 75 100 0.0 125 10 Switch Frequency 22 23 Feedback Pin Bias Current 300 60 VIN =20V, I LOAD=2A Normalized at TJ=25℃ 50 200 Bias Current (nA) Frequency (kHz) 20 ON/OFF Pin Voltage (V) Junction Temperature (℃) 250 15 150 100 40 30 20 Adjustable Version Only 50 0.0 -50 10 -25 0.0 0 25 50 75 100 125 Junction Temperature (℃) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw -50 -25 0 25 50 75 Junction Temperature (℃) 6 of 7 QW-R103-035,B P1696 LINEAR INTEGRATED CIRCUIT 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-R103-035,B