UNISONIC TECHNOLOGIES CO., LTD L1127 Preliminary CMOS IC ULTRA-LOW-NOISE, HIGH-SPEED, LOW-DROPOUT, 300mA LINEAR REGULATOR DESCRIPTION As a low dropout linear regulator, the UTC L1127 only needs low input voltage (2.5~6V), and can deliver current to 300mA for setting the output voltage. The UTC L1127 is ideal for being used in such battery-powered equipments notebook, personal computer and mother board. Its typical dropout voltage is 200mV at loading current 300mA. L1127 has 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.3V, 4.2V, 4.75V, 5.2V fixed voltage versions and 0.8V to 5.5V adjustable voltage versions. To protect itself against current over-loads and over temperature, the L1127 has short current limit and thermal shutdown functions. FEATURES * Operating Voltage: 2.5V~6V * Low Voltage Dropout * Output Current Guaranteed 300mA * For Setting Output Voltage Two Modes - Fixed mode : 1.0V,1.2V,1.5V,1.8V,2.5V,3.0V,3.3V,4.2V,4.75V,5.2V - ADJ mode: Adjustable Output Voltage 0.8V~5.5V * Internal Current Limit Protection * With Soft-Start * Internal Thermal Protection * Work Stably with Low ESR Ceramics Capacitor ORDERING INFORMATION Ordering Number Lead Free Halogen Free L1127L-xx-AF5-R L1127G-xx-AF5-R Note: xx: Output Voltage, refer to Marking Information. L1127L-xx-AF5-R Package Packing SOT-25 Tape Reel (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)Lead Free (4) G: Halogen Free, L: Lead Free www.unisonic.com.tw Copyright © 2012 Unisonic Technologies Co., Ltd 1 of 5 QW-R502-742.a L1127 Preliminary CMOS IC MARKING INFORMATION PACKAGE VOLTAGE CODE SOT-25 45: 4.5V MARKING PIN CONFIGURATION VOUT 5 1 VIN NC/ADJ 4 2 3 GND SHDN PIN DESCRIPTION NO. 1 2 PIN NAME VIN GND I/O I 3 SHDN NC. I Control pin for shutdown; logic high: enable ;logic low: shutdown O This pin is connected to an external resistor divider, turns to adjustable output voltage mode operation. Output pin 4 5 ADJ VOUT DESCRIPTION Voltage supply Ground UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R502-742.a L1127 Preliminary CMOS IC BLOCK DIAGRAM For Fixed Output Voltage Mode: For Adjustable Output Voltage Mode: UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 5 QW-R502-742.a L1127 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER VIN Supply Voltage (VIN to GND) SHDN Input Voltage ( SHDN to GND) SYMBOL VIN VSHDN RATINGS +6.5 UNIT V -0.3 ~ +6.5 V Power Dissipation PD 400 mW Junction Temperature TJ +125 °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. RECOMMENDED OPERATING CONDITIONS PARAMETER VIN Supply Voltage Output Voltage VOUT Output Current Operating Temperature SYMBOL VIN VOUT IOUT TOPR RATINGS 2.5 ~ 6 0.8 ~ 5.5 0 ~ 300 -40 ~ +85 UNIT V V mA °С ELECTRICAL CHARACTERISTICS (VIN = VOUT+0.5V (min VIN=2.5V), IOUT=0~300mA, CIN = 1μF, COUT =1μF, TA = 25°С, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT 102%x VIN = VOUT+0.5V, 98%x Output Voltage V VOUT 1mA<IOUT<300mA VOUT Input Voltage VIN 2.5 6 V Line Regulation REGLINE VOUT+0.5V<VIN<6V,IOUT= 10mA 0.06 %/V VIN = VOUT+0.5V, 0.6 %/A Load Regulation REGLOAD 1mA<IOUT<300mA VIN = VOUT+0.5V, 0.784 0.8 0.816 V Reference Voltage VREF 1mA<IOUT<300mA Maximum Output Current IOUT(MAX) VIN=VOUT+0.5V, VOUT= 0.98xVOUT 300 400 mA Quiescent Current IQ IOUT =10mA ~300mA 60 90 μA VOUT = 1.0V, IOUT = 300mA 1400 1500 VOUT = 1.2V, IOUT = 300mA 1200 1300 VOUT = 1.5V, IOUT = 300mA 900 1000 Dropout Voltage VD mV VOUT = 1.8V, IOUT = 300mA 600 700 VOUT =2.5V,2.8V,3.3V,4.2V, 170 300 IOUT = 300mA VOUT=4.75V and 5.2V, IOUT=300mA 140 300 Power Supply Ripple Rejection Ratio PSRR f = 10kHz, IOUT = 300mA 45 dB Short Current Limit ISHORT VOUT = 0V 50 mA 1.5 6 V VIH Shutdown Threshold VIL 0 0.4 V Shutdown Supply Current IOFF Soft Start Time TSS RMS Output Noise VOUT Discharge MOSFET RDS(ON) VNOISE SHDN = Low, VIN = VOUT+0.5V 1 μA 50 μs TA=25°С, 10Hz ≤ f ≤100kHz, VOUT = 0.8V 60 μVRMS SHDN = low 60 Ω 3 MΩ +100 165 30 ppm/°С °С °С SHDN Pull Down Resistance Output Voltage Temperature Coefficient TJ= -40°С~85°С Thermal Shutdown Temperature TSHDN Thermal Shutdown Hysteresis DTSHDN UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 0.1 4 of 5 QW-R502-742.a L1127 Preliminary CMOS IC TYPICAL APPLICATION CIRCUITS For Fixed Output Voltage Mode: s For Adjustable Output Voltage Mode: VOUT = 0.8 × (1+ R1 ) R2 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 5 of 5 QW-R502-742.a