UNISONIC TECHNOLOGIES CO., LTD P1583 Preliminary LINEAR INTEGRATED CIRCUIT 380KHz, 2.5A STEP-DOWN SWITCHING REGULATOR DESCRIPTION The UTC P1583 is a fixed 380kHz frequency, current mode, PWM controller. It achieves 2.5A continuous output current over a wide input supply range with excellent load and line regulation. Equipped with an external compensation pin, this device offers user flexibility in determining loop dynamic. The UTC P1583 integrates controls, monitoring and protection functions into a single 8-pin package to provide a low cost and perfect power solution. The device provides wide 4 to 24V operating input range, also highly efficient with peak operating efficiency at 90%. An Under-Voltage-Lock-Output (UVLO) circuit monitors the Vin supply voltage to prevent wrong logic controls. An internal 1.222V reference provides low output voltage down to 1.22V for further applications. An internal soft-start prevents the output voltage from overshoot as well as limiting the input current. The controller’s over-current protection monitors the output current by using the voltage drop across a current sensing resistor. Additional under voltage protections monitor the voltage on FB pin for short-circuit protections. The UTC P1583 provides fast transient respond and requires very few external devices for operation. FEATURES * 2.5A output current * 380kHz frequency of operation * 4V to 24V input voltage range * 25μA shutdown supply current * Output adjustable from 1.22 to 21V * Frequency foldback at short circuit * Thermal shutdown * Under voltage lock output * Current mode with low ESR output ceramic capacitors * Up to 90% efficiency ORDERING INFORMATION Ordering Number Lead Free Halogen Free P1583L-SH2-R P1583G-SH2-R www.unisonic.com.tw Copyright © 2013 Unisonic Technologies Co., Ltd Package Packing HSOP-8 Tape Reel 1 of 5 QW-R103-071.a P1583 Preliminary LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION BS 1 IN 2 8 SS 7 EN GND 3 6 COMP GND 4 5 FB PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 SW PIN NAME BS IN SW GND FB COMP EN SS DESCRIPTION Supply pin to the power transistor driver. Power supply pin. Power switch output pin. Ground pin. The output voltage feedback pin. It is also the inverting input of the error amplifier. Compensation pin. Regulator On/Off control pin. Soft start control input. BLOCK DIAGRAM IN 2 EN 7 UVLO Reference OTP Current Sense + + + Slope COMP COMP 6 1.22V FB 5 + EA Rsense 1 BS PWM + - - S Power Transistor Q R Driver 3 SW SS 8 UVLO UVLO Slope COMP Slope COMP 4 GND 40K-380KHz UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R103-071.a P1583 Preliminary LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING (Note 1) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VIN 28 V Switch Voltage VSW -1~VIN+1 V Boost Voltage VBS VSW+6 V Feedback Voltage VFB -0.3~6 V Enable/UVLO Voltage VEN -0.3~6 V Comp Voltage VCOMP -0.3~6 V Sync Voltage VSYNC -0.3~6 V Junction Temperature TJ 150 °C Lead Temperature TL 260 °C Storage Temperature TSTG -65~+150 °C Notes: 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. RECOMMENDED OPERATING CONDITIONS (Note 1) PARAMETER SYMBOL RATINGS Input Voltage VIN 4~24 Ambient Operating Temperature TA -40~+125 Note: 1. The device is not guaranteed to function outside its operating rating. UNIT V °C PACKAGE THERMAL CHARACTERISTICS (Note 1) PARAMETER SYMBOL RATINGS Thermal Resistance θJA 105 Thermal Resistance θJC 50 Note: 1. Measured on approximately 1” square of 1 oz. Copper surrounding device leads. UNIT °C/W °C/W ELECTRICAL CHARACTERISTICS (Unless otherwise specified VIN=12V, TA=25°C) PARAMETER SYMBOL Feedback Voltage VFB Upper Switch Leakage Current Limit Current Limit Gain. Output Current to Comp Pin Voltage Oscillator Frequency Short Circuit Frequency Maximum Duty Cycle Minimum Duty Cycle Enable Threshold Enable Pull Up Current Under Voltage Lockout Threshold Rising Supply Current (Shutdown) Supply Current (Quiescent) Collector-Emitter Saturation Voltage Thermal Shutdown ILEAK ILIMIT MIN TYP MAX UNIT 1.198 1.222 1.246 V 2.4 0 3.0 10 3.6 µA A 2.5 FOSC FOSC_SHORT DMAX DMIN VEN IUP ISD IQ VCESAT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TEST CONDITIONS 4.75V≤VIN≤25V, VCOMP<2V VEN=0V, VSW =0V VFB=0V VFB=1.0V VFB=1.5V ICC>100μA VEN=0V VEN≤0.4V VEN≥2.6V; VFB=1.4V IOUT=2A 342 20 90 380 40 95 1.0 0.7 1.2 23 1.5 400 160 A/V 418 0 1.3 36 2 600 KHZ KHZ % % V µA V µA mA mV °C 3 of 5 QW-R103-071.a P1583 Preliminary TYPICAL APPLICATION CIRCUIT LOW VIN APPLICATION CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw LINEAR INTEGRATED CIRCUIT 4 of 5 QW-R103-071.a P1583 Preliminary 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 5 of 5 QW-R103-071.a