UNISONIC TECHNOLOGIES CO., LTD UR5516C LINEAR INTEGRATED CIRCUIT 3A BUS TERMINATION REGULATOR DESCRIPTION The UTC UR5516C 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 UR5516C 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 UR5516C provides low profile 8-pin SOIC package to save system space. FEATURES *Pb-free plating product number: UR5516CL * 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 ORDERING INFORMATION Ordering Number Normal Lead Free Plating UR5516C-S08-R UR5516CL-S08-R UR5516C-S08-T UR5516CL-S08-T www.unisonic.com.tw Copyright © 2007 Unisonic Technologies Co., Ltd Package Packing SOP-8 SOP-8 Tape Reel Tube 1 of 9 QW-R101-020,A UR5516C LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1 2 3,4 5 6 7 8 PIN NAME VIN VFB VOUT VREF VCCA AGND PGND DESCRIPTION Input power Feedback node for the VOUT Output voltage Reference voltage input and chip enable Voltage supply for internal circuits Analog ground Power ground THERMAL DATA PARAMETER Thermal Resistance UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw SYMBOL θJC RATINGS 14 UNIT °C/W 2 of 9 QW-R101-020,A UR5516C LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM VCCA Current Limit VREF VIN Control + - VOUT Thermal Limit GND VFB UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 9 QW-R101-020,A UR5516C LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS 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-R101-020,A UR5516C LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(TJ=25°C, VCCAL=3.3V,VIN=2.5V/1.8V,VREF=0.5VIN,unless otherwise specified) PARAMETER Output Voltage System Accuracy Offset Voltage (VOUT–VREF) Load Regulation Current Limit Thermal Shutdown Temperature Thermal Shutdown Hysteresis VCCA Supply Current VREF Bias Current (The current flows out of VREF) Shutdown Threshold Voltage 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 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 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 % A °C °C 3 110 mA 500 40 0.65 nA µA V 5 of 9 QW-R101-020,A UR5516C LINEAR INTEGRATED CIRCUIT APPLICATIONS CIRCUIT Application Circuit as Adjustable LDO VCCA R3&R4 to set VFB,and VOUT range could be adjusted from 0V to VIN VIN R1 VIN VCCA GND VFB Q1 R2 CVCCA 10uF VOUT VREF EN CIN 470uF VOUT R3 CSS 1uF COUT 200uF R4 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 9 QW-R101-020,A UR5516C LINEAR INTEGRATED CIRCUIT OPERATING WAVEFORMS 1. 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 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 AT +10mA IOUT -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-R101-020,A UR5516C LINEAR INTEGRATED CIRCUIT 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 4. Short-Circuit Test - VIN = 2.5V, VCCA = 3.3V VOUT is Shorted to GND VOUT is Shorted to VIN (2.5V) IOUT VOUT IOUT AT AT VOUT IOUT VOUT IC IC Ch1 : VOUT, 500mV/Div, DC, Offset = 1.250V Ax1 : IOUT, 2A/Div Time : 5mS/Div UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Ch1 : VOUT, 500mV/Div, DC, Offset = 1.250V Ax1 : IOUT, 2A/Div Time : 5mS/Div 8 of 9 QW-R101-020,A UR5516C TYPICAL CHARACTERISTICS Dropout Voltage (V) VREF Bias Current, IBIAS (µA) LINEAR INTEGRATED CIRCUIT VIN Dropout Voltage vs. Output Current 1.2 1.0 VREF=0.9V VCCA=5.0V TJ = 25°C 0.8 0.6 0.4 0.2 0.0 0.0 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 9 of 9 QW-R101-020,A