UNISONIC TECHNOLOGIES CO., LTD P34563 Preliminary LINEAR INTEGRATED CIRCUIT PWM CONTROL 3A STEP-DOWN CONVERTER DESCRIPTION The UTC P34563 consists of step-down switching regulator with PWM control. The UTC P34563 provides low-ripple power, high efficiency, and excellent transient characteristics. The PWM control circuit is able to the duty ratio linearly forms 0 up to 100%. With the addition of an internal P-channel Power MOS, and a diode connected externally, these ICs can function as step-down switching regulators. They serve as ideal power supply units for portable devices when coupled with the HSOP-8 package, providing such outstanding features as low current consumption. Since this converter can accommodate an input voltage up to 40V. FEATURES * Input voltage: 8V~40V * Oscillation frequency: 100KHz * Duty ratio: 0%~100% PWM control * Adjustable version output voltage range from 3.3V to 38V * Enable and auto restart function. * Short Circuit Protect (SCP). * Thermal Shutdown function / Internal OVP. * Built-in internal SW P-channel MOS. ORDERING INFORMATION Ordering Number P34563G-SH2-R Package HSOP-8 Packing Tape Reel P34563G-SH2-R (1)Packing Type (1) R: Tape Reel (2)Package Type (2) SH2: HSOP-8 (3)Green Package (3) G: Halogen Free and Lead Free MARKING www.unisonic.com.tw Copyright © 2016 Unisonic Technologies Co., Ltd 1 of 4 QW-R103-074.c P34563 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION EN/CT 1 8 FB VSS 2 7 SENSE2 VGATE 3 6 SENSE1 VCC 4 5 SW SW PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 Preliminary PIN NAME EN/CT VSS VGATE VCC SW SENSE1 SENSE2 FB DESCRIPTION ON/OFF and auto restart control GND pin Driver gate clamping pin. Operating voltage input Switch pin. Current sense input1 Current sense input2 Feedback pin BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 4 QW-R103-074.c P34563 Preliminary LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified.) PARAMETER SYMBOL RATINGS UNIT VCC Pin Voltage VCC VSS -0.3~VSS+45 V Feedback Pin Voltage VFB VSS-0.3~38 V EN/CT, OVP Pin Voltage VSS-0.3~6 V SENSE1,SENSE2 Pin Voltage VSS-0.3~38 V Switch Pin Voltage VSW VSS-0.3~VCC+0.3 V Power Dissipation PD (TJ -TA)/ θJA W Operating Supply Voltage VOP +8~+40 V Output Current IOUT 0~3 A Operating Temperature TOPR -20~+125 °C Storage Temperature TSTG -40~+165 °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. THERMAL CHARACTERISTICS PARAMETER Junction to Ambient Junction to Case SYMBOL θJA θJC RATINGS 143 15 UNIT °C/W °C/W ELECTRICAL CHARACTERISTICS PARAMETER FB Under Voltage Lockout UVLO Hysteresis OVP Detect Voltage Line Regulation Load Regulation Quiescent Current Oscillator Frequency Max. Duty Cycle (ON) Min. Duty Cycle (OFF) Internal MOSFET RDSON Sense Voltage Sense Voltage Hysteresis EN/CT Pin Logic Input Threshold Voltage EN/CT Pin Current EN/CT Pin Current Thermal Shutdown Temp Thermal Shutdown Hysteresis SYMBOL TEST CONDITIONS VFB IOUT=10mA UVLO Falling VOVP ∆VOUT ∆VOUT ICCQ FOSC DC RDSON VSENSE VSENSE-h VEN VCT IEN/CT-C IEN/CT-D TSD TSH FB Floating VCC=10~40V IOUT=0~1A, RSENSE=140mΩ VFB>1.2V 80 Force Driver On VFB=0.7V Force Driver Off VFB=1.2V VCC=12V, VFB = 0.7V VSENSE1-VSENSE2 Shutdown Mode Auto Restart, VFB<0.4V Charge Current Discharge Current UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 1.08 0.5 TYP MAX 1.10 1.12 6 0.8 1.250 0.5 1 10 3 7 100 120 100 0 110 170 150 45 0.3 1.5 -32 1.5 160 40 UNIT V V V V % mV mA KHz % % mΩ mV mV V V µA µA °C °C 3 of 4 QW-R103-074.c P34563 Preliminary LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT AL CAPACITOR 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 4 of 4 QW-R103-074.c