UR5516B

UNISONIC TECHNOLOGIES CO., LTD UR5516B 3A BUS TERMINATION REGULATOR DESCRIPTION The UTC UR5516B is a low cost linear regulator designed to provide a desired output voltage or termination voltage for various applications by converting voltage supplies ranging from 1V to 6.0V. The desired output voltage could be programmable by two external voltage divider resistors. The UR5516B is capable of sourcing or sinking up to 2A of current while regulating an output VOUT voltage to within 2% (DDR-I), 3% (DDR-II) or less. The UR5516B provides low profile 8-pin SOIC package to save system space. LINEAR INTEGRATED CIRCUIT FEATURES * Provide bi-direction current - Sourcing or sinking current up to 3A * 1.25V/0.9V output for DDR I/II applications * Fast transient response * High output accuracy - ±20mv over load, VOUT offset and temperature * Adjustable output voltage by external resistors * Current-limit protection * On-chip thermal shutdown * Shutdown for standby or suspend mode *Pb-free plating product number: UR5516BL ORDERING INFORMATION Ordering Number Normal Lead Free Plating UR5516B-S08-R UR5516BL-S08-R UR5516B-S08-T UR5516BL-S08-T Package SOP-8 SOP-8 Packing Tape Reel Tube www.unisonic.com.tw Copyright © 2007 Unisonic Technologies Co., Ltd 1 of 9 QW-R101-019.A UR5516B PIN CONFIGURATION LINEAR INTEGRATED CIRCUIT PIN DESCRIPTION PIN NO. 1 3 4 5 6 2,7,8 PIN NAME VIN NC VOUT VREF VCCA GND DESCRIPTION Input Power No Connection Output Voltage Reference Voltage Input and Chip Enable Voltage supply for internal circuits Ground THERMAL DATA PARAMETER Thermal Resistance SYMBOL θJC RATINGS 14 UNIT °C/W UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 9 QW-R101-019.A UR5516B BLOCK DIAGRAM LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 9 QW-R101-019.A UR5516B ABSOLUTE MAXIMUM RATINGS LINEAR INTEGRATED CIRCUIT PARAMETER SYMBOL RATINGS UNIT VCCA Supply Voltage, VCCA to GND VCCA -0.2 ~ 7 V VIN Supply Voltage, VIN to GND VIN -0.2 ~ 3.9 V Power Dissipation PD Internally Limited W Junction Temperature TJ +150 °C Storage Temperature TSTG -40 ~ +150 °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. RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL RANGES UNIT VCCA Supply Voltage (Note 1) VCCA 3.1 ~ 6 V VIN Supply Voltage (Note 2) VIN 1.2 ~ 3.5 V VREF Input Voltage VREF 0.85 ~ 1.75 V VOUT Output Voltage (Note 3) VOUT VREF ± 0.02 V VOUT Output Current (Note 4,5) IOUT -3 ~ +3 A Junction Temperature TJ 0 ~ +125 °C Note: 1. Please always keep VCCA -VOUT>1.9V for good regulation. 2. Please supply enough voltage to VIN for sourcing desired maximum output current. Please refer to the VIN Dropout Voltage vs. Output Current in the Typical Characteristics. 3. The VOUT is regulated to the VREF with additional voltage offset and load regulation except over-load conditions. 4. The symbol “+” means the VOUT sources current to load; the symbol “-“ means the VOUT sinks current to GND. 5. The max. IOUT varies with the TJ and the voltages of VIN-VOUT and VOUT. Please refer to the Typical Characteristics. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 9 QW-R101-019.A UR5516B otherwise specified) PARAMETER Output Voltage System Accuracy Offset Voltage (VOUT–VREF) Load Regulation LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(TJ=25°C, VCCA =3.3V,VIN=2.5V/1.8V,VREF=0.5VIN,unless SYMBOL TEST CONDITIONS MIN VOUT IOUT=0A Over temperature, VOUT offset, and load -20 regulation IOUT=+10mA -20 VO(OFF) IOUT=-10mA IOUT=+10mA ~ +3A ∆VOUT IOUT= -10mA ~ -3A TJ=25°C +3 Sourcing Current (VIN=2.5V) TJ=125°C TJ=25°C -3 Sinking Current (VIN=2.5V) TJ=125°C ILIMIT TJ=25°C +2.9 Sourcing Current (VIN=1.8V) TJ=125°C TJ=25°C -2.9 Sinking Current (VIN=1.8V) TJ=125°C TSHDN Rising TJ THYS IOUT=0A 1 ICCA IOUT=±3A (Normal Operation) VREF=GND (Shutdown) VREF=1.25V/0.9V (Normal Operation) IBIAS VREF=GND (Shutdown) VSHDN 0.2 TYP VREF MAX UNIT V 20 20 2 2 +3.6 +3.1 -3.6 -3.1 +3.2 +2.6 -3.2 -2.6 183 42 2 50 2.0 200 20 0.35 mV mV % Current Limit A Thermal Shutdown Temperature Thermal Shutdown Hysteresis VCCA Supply Current VREF Bias Current (The current flows out of VREF) Shutdown Threshold Voltage °C °C 3 110 500 40 0.65 mA nA µA V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 9 QW-R101-019.A UR5516B APPLICATIONS CIRCUIT 1. General Application LINEAR INTEGRATED CIRCUIT 2. For VOUT=1.25V/0.9V 3. For VOUT=1.4V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 9 QW-R101-019.A UR5516B OPERATING WAVEFORMS 1. Load Transient Response: IOUT = +10mA -> +3A -> +10mA - VIN = 2.5V, VCNTL = 3.3V - VREF is 1.250V supplied by a regulator - COUT = 470µF/10V, ESR = 30mΩ - IOUT slew rate = ±3A/µS LINEAR INTEGRATED CIRCUIT 2. Load Transient Response: IOUT = -10mA -> -3A -> -10mA - VIN = 2.5V, VCCA = 3.3V - VREF is 1.250V supplied by a regulator - COUT = 470µF/10V, ESR = 30mΩ - IOUT slew rate = ±3A/µS IOUT = -10mA -> -3A -> -10mA Load Regulation = +6.5mV VOUT IC IOUT AT +10mA -3A Ch1 : VOUT, 20mV/Div, DC, Offset = 1.250V Ax1 : IOUT, 1A/Div Time : 20μS/Div UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 9 QW-R101-019.A UR5516B OPERATNG WAVEFORMS(Cont.) 3. Load Transient Response: IOUT = +3A -> -3A -> +3A - VIN = 2.5V, VCCA = 3.3V - VREF is 1.250V supplied by a regulator - COUT = 470µF/10V, ESR = 30mΩ - IOUT slew rate = ±3A/µS LINEAR INTEGRATED CIRCUIT 4. Short-Circuit Test - VIN = 2.5V, VCCA = 3.3V VOUT is Shorted to GND IOUT VOUT IOUT AT AT VOUT VOUT IC IC IOUT VOUT is Shorted to VIN (2.5V) Ch1 : VOUT, 500mV/Div, DC, Offset = 1.250V Ax1 : IOUT, 2A/Div Time : 5mS/Div Ch1 : VOUT, 500mV/Div, DC, Offset = 1.250V Ax1 : IOUT, 2A/Div Time : 5mS/Div UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 9 QW-R101-019.A UR5516B TYPICAL CHARACTERISTICS LINEAR INTEGRATED CIRCUIT VREF Bias Current, IBIAS (µA) VIN Dropout Voltage vs. Output Current 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.0 VREF=0.9V VCCA=5.0V TJ = 25°C 0.5 1.0 1.5 2.0 2.5 3.0 Output Current (A) 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 Dropout Voltage (V) 9 of 9 QW-R101-019.A