UNISONIC TECHNOLOGIES CO., LTD LR1811 Advance CMOS IC 1A FAST ULTRA LOW DROPOUT LINEAR REGULATOR DESCRIPTION The UTC LR1811 operate from a +1.5V~+6V input supply as fast ultra low-dropout linear regulators. Wide output voltage range options are available. The fast response characteristic to make UTC LR1811 suitable for low voltage microprocessor application. The low quiescent current operation and low dropout quality caused by the CMOS process. The UTC LR1811 has low dropout voltage. The ground pin current is typically 80μA. Output Voltage Precision: Multiple output voltage options are available and ranging from 1.2V~5.0V at room temperature with a guaranteed accuracy of ±1.5%, and ±3.0% when varying line and load. The output voltage types of UTC LR1811 are fixed one in the IC. FEATURES * Low Dropout Voltage * The Guaranteed Output Current is 1A DC * Output Voltage Accuracy ± 1.5% * Over temperature Protection And Over current Protection Note: ORDERING INFORMATION Ordering Number LR1811G-xx-SH2-R xx: Output Voltage, refer to Marking Information Package HSOP-8 Packing Tape Reel LR1811G-xx-SH2-R (1)Packing Type (1) R: Tape Reel (2)Package Type (2) SH2: HSOP-8 (3)Output Voltage (3) xx: Refer to Marking Information (4)Green Package (4) G: Halogen Free and Lead Free www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 6 QW-R125-039.a LR1811 Advance CMOS IC MARKING INFORMATION PACKAGE VOLTAGE CODE HSOP-8 12: 1.2V 15 : 1.5V 18: 1.8V 25: 2.5V 30: 3.0V 33: 3.3V 50: 5.0V MARKING PIN CONFIGURATION VOUT 1 8 VIN ON/ OFF 2 7 NC NC 3 6 NC GND 4 5 NC GND PIN DESCRIPTION PIN NO. 1 PIN NAME VOUT 2 ON /OFF PIN DESCRIPTION Output voltage ON/OFF select pin, when connected to the ground the chip in operating normally. 3, 5,6,7 NC No connection 4 GND GND 8 VIN Input voltage Note: The NC pin is electrically open. The NC pin can be connected to VIN or GND. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R125-039.a LR1811 Advance CMOS IC BLOCK DIAGRAM Fixed Output Voltage UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R125-039.a LR1811 Advance CMOS IC ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Input Voltage VIN 7 V Shutdown Input Voltage VIN(SHDN) -0.3~VIN V Maximum Operating Current (DC) 1 A Power Dissipation (Note 3) PD Internally Limited Junction Temperature TJ +125 °C Storage Temperature TSTG -65~ +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. THERMAL DATA PARAMETER Junction to Ambient Junction to Case SYMBOL θJA θJC RATINGS 143 45 UNIT °C/W °C/W ELECTRICAL CHARACTERISTICS (TJ=25°C, unless otherwise specified.) PARAMETER Input Voltage Output Voltage (Note 3) Output Voltage Line Regulation Output Voltage Load Regulation SYMBOL VIN VOUT(E) TEST CONDITIONS VIN=VOUT(S)+1V IOUT=100mA △VOUT2 VIN=VOUT(S)+1V,1mA≤IOUT≤300mA Vdrop IOUT=1000mA Output Current(Note 5) 1.5V≤VOUT(S) ≤3.5V IOUT VIN≥VOUT(S)+1V ISS1 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TYP MAX 6 VOUT(S) VOUT(S) + 0.015 0.015 VOUT(S) VOUT(S) VOUT(S) x 0.99 x 1.01 -20 1.2V≤VOUT(S)<1.5V 1.5V≤VOUT(S)<2.6V 2.6V≤VOUT(S) ≤5.0V 1.2V≤VOUT(S)<1.5V 1.5V≤VOUT(S)<2.0V 2.0V≤VOUT(S)<2.6V 2.6V≤VOUT(S) ≤5.0V VIN=VOUT(S)+1V, ON/OFF pin=ON, No Load VIN=VOUT(S)+1V, ON/OFF pin=OFF, ISS2 No Load VIN=VOUT(S)+1V, ON/OFF pin=ON, Short Circuit Current ISC VOUT=0V △VOUT/ VIN=VOUT(S)+1V,IOUT=100mA, Output Voltage Temperature (△T A×VOUT) -40°C ≤ TA≤+85°C Coefficient(Note 6) ON/OFF Pin Input Voltage “H” VSH VIN=VOUT(S)+1V, RL=1.0KΩ Determinied by VOUT output level ON/OFF Pin Input Voltage “L” VSL ON/OFF Pin Input Current “H” ISH VIN=VOUT(S)+1V,VON/OFF=5.5V ON/OFF Pin Input Current “L” ISL VIN=VOUT(S)+1V,VON/OFF=0V Ground Pin Current In Normal Operation Mode Ground Pin Current In Power-off Mode － △VOUT1/ +0.5V≤VIN≤5.5V,IOUT=100mA V (△VIN×VOUT) OUT(S) IOUT=300mA Dropout Voltage(Note 4) 1.0V≤VOUT(S)<1.5V MIN 1.5 VOUT(S) V 0.2 %/V -3 20 mV 0.34 0.10 0.07 0.70 0.40 0.32 0.23 0.38 0.15 0.10 V mA 80 120 μA 0.1 1.0 μA 2 A ±100 ppm/°C 1.5 -0.1 -0.1 V 0.05 1000 (Note 7) 50 UNIT V 0.3 0.1 0.1 V μA μA 4 of 6 QW-R125-039.a LR1811 Advance CMOS IC ELECTRICAL CHARACTERISTICS (Cont.) PARAMETER Ripple Rejection SYMBOL |RR| TEST CONDITIONS VIN=VOUT(S)+1V, 1.2V≤VOUT(S)<3.0V f=1khz, 3.0V≤VOUT(S)≤3.5V △Vrip=0.5Vrms, 3.5V≤VOUT(S)≤5.0V IOUT=100mA MIN TYP MAX UNIT 65 60 dB 55 Thermal Shutdown detection TSD Junction temperature 150 °C temperature Thermal Shutdown release TSR Junction temperature 120 °C temperature Notes: 1. The UTC LR1811 output must be diode-clamped to ground. If used in a dual-supply system where the regulator load is returned to a negative supply. 2. Devices must be derated based on package thermal resistance at elevated temperatures. 3. VOUT(S): Specified output voltage VOUT(E): Actual output voltage Output voltage when fixing IOUT(=100mA) and inputting VOUT(S)+1.0V 4. Vdrop=VIN1-(VOUT3×0.98) VOUT3 is the output voltage when VIN=VOUT(S)+1.0V and IOUT=300mA, 1000mA. 5. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the output current. 6. The change in temperature [mV/°C] is calculated using the following equation. VOUT VOUT mV / C VOUT ( S ) V ppm / C 1000 TA TA VOUT 7. The output current can be at least this value. Due to restrictions on the package power dissipation, this value may not be satisfied. Attention should be paid to the power dissipation of the package when the output current is large. This specification is guaranteed by design. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R125-039.a LR1811 Advance CMOS IC TYPICAL APPLICATION CIRCUIT Fixed Output Voltage (1) ON/OFF pins must be pulled high through a 10kΩ pull-up resistor. (2) Generally a series regulator may cause oscillation, depending on the selection of external parts. The following conditions are recommended for this IC. However, be sure to perform sufficient evaluation under the actual usage conditions for selection, including evaluation of temperature characteristics. Input capacitor (CIN): 2.2μF or more Output capacitor (CL): 2.2μF or more 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-R125-039.a