UNISONIC TECHNOLOGIES CO., LTD LR2126 CMOS IC 1A FAST ULTRA LOW DROPOUT LINEAR REGULATOR DESCRIPTION The UTC LR2126 operate from a +2.5V ~ +6.0V input supply as fast ultra low-dropout linear regulators. Wide output voltage range options are available. The fast response characteristic to make UTC LR2126 suitable for low voltage microprocessor application. The low quiescent current operation and low dropout quality caused by the CMOS process. The UTC LR2126 has ultra low dropout voltage 300mV at 1A load current typically. The ground pin current is typically 60uA at 1mA load current. 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, load and temperature. FEATURES * Ultra Low Dropout Voltage * Low Ground Pin Current * 0.04% Load Regulation * The Guaranteed Output Current is 1A DC * Output Voltage Accuracy ± 1.5% * Low Output Capacitor Required * Over temperature Protection And Over current Protection ORDERING INFORMATION Ordering Number LR2126G-xx-AB5-R www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd Package SOT-89-5 Packing Tape Reel 1 of 7 QW-R502-A60.B LR2126 CMOS IC MARKING INFORMATION PACKAGE VOLTAGE CODE SOT89-5 AD: ADJ PIN ASSIGNMENTS PIN DESCRIPTION PIN NO MARKING PIN NAME DESCRIPTION Shutdown LR2126 enable; when the EN pin connects to GND will shutdown 1 EN the LR2126; At normal operation, EN must be tied to VDD through a 10KΩ pull up resistor. 2 GND Ground. Adjustable voltage version only – a resistor divider from this pin to the OUT pin 3 ADJ and ground sets the output voltage. 4 IN Input voltage. 5 OUT Output 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 7 QW-R502-A60.B LR2126 CMOS IC BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 7 QW-R502-A60.B LR2126 CMOS IC ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Input Voltage (Operating) 2.5~7.0 V VIN -0.3~+7.5 V Input Voltage (Survival) Shutdown Input Voltage VIN(SHDN) -0.3~VIN+0.3 V Output Voltage (Survival), (Note 1, 2) VOUT -0.3~+7.5 V IOUT (Survival) Short Circuit Protected Maximum Operating Current (DC) 1 A Power Dissipation (Note 3) PD Internally Limited Junction Temperature TJ +125 °C Operating Temperature TOPR -40~+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 SYMBOL θJA RATINGS 160 UNIT °C/W ELECTRICAL CHARACTERISTICS TJ = 25°C, VIN = VOUT(NOM) + 1V, IOUT = 10mA, CIN = 4.7μF ,COUT = 4.7μF, VEN = VIN-0.3V, unless otherwise specified.(Note 4) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT +1.5 0mA ≤ IOUT ≤ 1A -1.5 % 0 Output Voltage Tolerance (Note 5) VOUT +3 VOUT +1 ≤ VIN≤ 6.0V -3 Output Voltage Line Regulation (Note 5) △VOUT VOUT+1V<VIN<6.0V 0.05 % Output Voltage Load Regulation (Note 5) △VOUT/△IOUT 10mA < IOUT < 1A 0.5 % Dropout Voltage (Note 6) VD IOUT = 1A 300 500 mV FB Reference Voltage VREF IOUT=10mA 0.8 V Ground Pin Current In Normal Operation IOUT = 0mA 60 IGND μA Mode IOUT = 1A 70 Start-Up Time tST VOUT=3V,RL=30Ω 100 μs SHORT CIRCUIT PROTECTION Short Circuit Current ISC 2 A OVER TEMPERATURE PROTECTION Shutdown Threshold TSHDN(THR) 165 °C Thermal Shutdown Hysteresis TSHDN(HYS) 10 °C SHUTDOWN INPUT Output = High VIN-0.3 VIN Shutdown Threshold VEN V Output = Low 0 0.3 EN Input Current IEN VEN = VIN 10 nA AC PARAMETERS VIN = VOUT + 1.5V 60 COUT=100uF, VOUT = 3.3V Ripple Rejection PSRR dB VIN = VOUT + 0.3V 40 COUT=100uF, VOUT = 3.3V Output Noise Density ρN(L/F) f = 120Hz 0.8 μV BW = 10Hz ~ 100kHz 150 Output Noise Voltage eN μVRMS BW = 300Hz ~ 300kHz 100 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 7 QW-R502-A60.B LR2126 CMOS IC ELECTRICAL CHARACTERISTICS(Cont.) Notes: 1. The LR2126 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. Between the VIN and VOUT terminals the output PMOS structure contains a diode. This diode is reverse biased normally. If the voltage at the output terminal is forced to be higher than the voltage at the input terminal this diode will get forward biased. This diode can withstand 1Amp of peak current and 200mA of DC current typically. 3. Devices must be derated based on package thermal resistance at elevated temperatures. 4. Conditions for which the device is intended to be functional is indicated by operating ratings, but specific performance limits isn’t be guaranteed. To make sure of specifications and test conditions, read Electrical Characteristics. Only for the test conditions listed the guaranteed specifications can be applied. When the device is not operated under the listed test conditions some performance characteristics may degrade. 5. Output voltage line regulation is the change in output voltage from the nominal value which is due to change in the input line voltage. Which is defined as the change in output voltage from the nominal value due to change in load current is output voltage load regulation. The load regulation and line regulation specification include the typical number only. But, the limits for load and line regulation are included in the output voltage tolerance specification. 6. At which the output drops 2% below the normal value dropout voltage is defined as the minimum input to output differential voltage. Only to output voltages of 2.5V and above dropout voltage specification applies. For output voltages below 2.5V, since the minimum input voltage is 2.5V, the drop-out voltage is nothing but the input to output differential. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 7 QW-R502-A60.B LR2126 CMOS IC TYPICAL APPLICATION CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 7 QW-R502-A60.B LR2126 CMOS IC TYPICAL CHARACTERISTICS Dropout Voltage vs. Output Current Dropout Voltage, VD (mV) 350 300 250 200 150 100 50 0 0 250 500 750 1000 Output Current, IOUT (mA) 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 7 of 7 QW-R502-A60.B