UNISONIC TECHNOLOGIES CO., LTD UC34463 LINEAR INTEGRATED CIRCUIT 200KHZ, 2A PWM BUCK SWITCHING REGULATOR DESCRIPTION UTC UC34463 is a PWM control, step down DC to DC power supply, fixed out 5V, with CC/CV mode and output line voltage loss compensation function. External EN port can control shutdown of the IC. IC internal integration of various protection function, such as SCP, OTP, OCP and so on. The highest working voltage is up to 40V. The built-in compensation simplifies the peripheral applications. The packages are available in a standard 8-lead SOP8. FEATURES * Voltage mode non-synchronous PWM control * Thermal-shutdown and current-limit protection * ON/OFF shutdown control input * Input voltage range up to 40V * Output load current: 2A * 200 kHz fixed frequency internal oscillator * Low power standby mode * Built-in switching transistor on chip ORDERING INFORMATION Ordering Number UC34463G-S08-R UC34463G-SH2-R Package SOP-8 HSOP-8 Packing Tape Reel Tape Reel MARKING www.unisonic.com.tw Copyright © 2014 Unisonic Technologies Co., Ltd 1 of 6 QW-R103-055.C UC34463 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION VCC 1 8 SW COMP 2 7 S+ EN 3 6 S- GND 4 5 VREF SOP-8 PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 HSOP-8 PIN NAME VCC COMP EN GND VREF SS+ SW DESCRIPTION Operating voltage input Compensation Shutdown pin Ground. 5V reference voltage Negative input Positive input Switching output BLOCK DIAGRAM VREF VCC EN Bias start 5V REF 2.5V REF OCP + CV COMP S- - + - PWM - driver - 2A switch SW CA S+ + OSC. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw GND 2 of 6 QW-R103-055.C UC34463 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC +45 V Power Dissipation PD Internally limited W Storage Temperature TSTG -65 ~ +150 °C Operating Temperature TOPR -40 ~ +125 °C 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 (VIN=12V, ILOAD = 0.2A, unless otherwise specified) PARAMETER Oscillator Frequency Oscillator Frequency of Short Circuit Protect SYMBOL FOSC FSCP Saturation Voltage VSAT Max. Duty Cycle(ON) Min. Duty cycle(OFF) DC Current Limit ICL Output Leakage Current Output = 0V IL Output = -1V Quiescent Current Standby Quiescent Current ON/OFF Pin Logic Input Threshold Voltage ON/OFF Pin Logic Input Current ON/OFF Pin Input Current Over Temperature Shutdown Threshold IQ ISTBY VIL VIH IH IL Ts TEST CONDITIONS When current limit occurred and VOUT low IOUT=1.5A no outside circuit VOUT=0V force driver on VOUT=0V force driver on VOUT=12V force driver off peak current no outside circuit VOUT=0 force driver on no outside circuit VOUT=12 force driver off VIN=24V VOUT=12 force driver off Low (regulator ON) High (regulator OFF) VLOGIC=2.5V (OFF) VLOGIC=0.5V (ON) TJ increasing TJ decreasing TYP 200 MAX 220 30 2.4 2.4 ON/OFF pin=5V, VIN=24V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 170 2.0 1.25 1.25 100 0 2.9 2.9 -5 5 70 70 1.3 1.3 -0.1 175 150 UNIT Khz Khz 1.4 1.5 V % 3.3 3.6 A -200 uA 10 150 200 0.6 0.01 -1 mA mA uA V uA °C 3 of 6 QW-R103-055.C UC34463 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT Note: If VCC>24V, COMP pin to GND need to add 0.1uF (option) compensation capacitor. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 6 QW-R103-055.C UC34463 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS 1. Boot Power (CH2: Yellow 5V/div, CH3: Blue 2V/div) VIN=12V VIN=24V 5V 5V 0 2V 0 2V 0 0 0 25 Time (5ms/div) 50 0 25 Time (5ms/div) 50 2. CA Mode UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R103-055.C UC34463 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 6 of 6 QW-R103-055.C