UNISONIC TECHNOLOGIES CO., LTD LR1148 CMOS IC 600mA LOW DROPOUT LINEAR REGULATOR DESCRIPTION The UTC LR1148 belonged to low-noise, low-dropout, linear regulators operate from 2.3V to 6V input and are guaranteed to deliver 600mA. Wide range of preset output voltage options are available. Built-in low on-resistance transistor provides low dropout voltage and large output current. The UTC LR1148 is designed and optimized for battery-powered systems to work with low noise. The UTC LR1148 consumes less than 0.01μA in shutdown mode. Other features include ultra low dropout voltage, current limiting protection, thermal shutdown protection and high ripple rejection ratio. FEATURES * 600mA Guaranteed Output Current * 0.01μA Shutdown Current * Ultra Low Dropout Voltage * Low Temperature Coefficient * Current Limiting Protection * Thermal Shutdown Protection * Excellent Line/Load Transient ORDERING INFORMATION Ordering Number LR1148G-xx-AF5-R Note: Pin Assignment: I:VIN O:VOUT G:GND LR1148G-xx-AF5-R Package S:EN SOT-25 A: ADJ 1 I Pin Assignment 2 3 4 G S A (1)Packing Type (1) R: Tape Reel (2)Package Type (2) AF5: SOT-25 (3)Output Voltage Code (3) xx: refer to Marking Information (4)Green Package (4) G: Halogen Free and Lead Free 5 O Packing Tape Reel MARKING INFORMATION PACKAGE VOLTAGE CODE SOT-25 AD: ADJ www.unisonic.com.tw Copyright © 2014 Unisonic Technologies Co., Ltd MARKING 1 of 4 QW-R502-A74.b LR1148 CMOS IC PIN CONFIGURATION VOUT ADJ 4 5 2 3 GND EN PIN DESCRIPTION PIN NAME VIN GND EN VOUT ADJ 1 VIN DESCRIPTION Power Input Voltage. Supply voltage can range from 2.3V to 6V. Bypass with a 1µF capacitor to GND. Ground Active-Low Shutdown Input. A logic low at EN reduces supply current to 0.01µA. Connect EN to VIN for normal operation. Output Voltage Voltage-adjust Input. Connect an external resistive voltage-divider from VOUT to ADJ to set the output voltage between 0.8V and 5V. BLOCK DIAGRAM VIN ON OFF EN Thermal Sensor Current Limit SHDN VOUT VREF AMP + ADJ GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 4 QW-R502-A74.b LR1148 CMOS IC ABSOLUTE MAXIMUM RATING (TA=25°С) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VIN 6.5 V Power Dissipation PD 360 mW Junction Temperature TJ +125 °С Ambient Operating Temperature TOPR -40 ~ +85 °С Storage Temperature TSTG -65 ~ +150 °С 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 260 81 UNIT C/W C/W ELECTRICAL CHARACTERISTICS (CIN = 1µF, COUT =1µF, TA= 25°C, unless otherwise specified)(Note 1) PARAMETER SYMBOL TEST CONDITIONS Input Voltage(Note 2) VIN TA＝25°С , IOUT= 1mA ~0.6A Output Voltage Accuracy VOUT TA＝0~85°С, IOUT= 1mA~0.6A (Preset Mode) Maximum Output Current IOUT Short-Circuit Current Limit ILIMIT VOUT=0V IOUT = 0mA Ground Pin Current IGND IOUT= 1mA to 600mA VOUT(NOM)<=1.8V Dropout Voltage (Note3) VD IOUT=600mA 1.8V<VOUT(NOM) Line Regulation (Note4) ∆VOUT ∆VIN × VOUT Load Regulation(Note4,5) Output Voltage Noise Shutdown Supply Current ∆VOUT eN IOFF VIH VIL TSHDN DTSHDN VREF MIN 2.3 -2 -3 TYP MAX 6 2 3 UNIT V % % mA A µA µA 600 1 70 80 500 200 1200 450 mV VIN=VOUT+VD~6V 0.08 0.55 %/V VIN=VOUT+VD, IOUT=10mA~600mA 0.25 1.0 % f=10Hz to100kHz, CBP=0.1nF EN=GND µVRM 24 S µA 2 V Shutdown Threshold 0.4 V Thermal Shutdown Temperature 170 °С Thermal Shutdown Hysteresis 20 °С ADJ Voltage Measured on ADJ, IOUT =10mA 0.774 0.8 0.826 V Adjustable Output Voltage 0.8 5 V Note: 1. Specifications are production tested at TA=25°C. Pecifications over the -40°C to 85°C operating temperature range are assured by design, characterization and correlation with Statistical Quality Controls(SQC). 2. The minimum operating value for VIN is equal to either [VOUT(NOM)+VD] or 2.3V,whichever is greater 3. Dropout voltage is defined as the voltage from the input to output when output is 2% below the nominal value. 4. Output voltage line regulation is defined as the change in output voltage from the nominal value resulting from a change in the input line voltage. Output voltage load regulation is defined as the change in output voltage from the nominal value as the load current increases from no load to full load. 5. Regulation is measured at constant junction temperature by using a 20ms current pulse. Devices are tested for load regulation in the load range from 10mA to 600mA. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 0.01 5 3 of 4 QW-R502-A74.b LR1148 CMOS IC TYPICAL APPLICATION CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 4 QW-R502-A74.b