UNISONIC TECHNOLOGIES CO., LTD LR9272 Preliminary CMOS IC SUPER LOW ON RESISTANCE / LOW VOLTAGE 1A LDO DESCRIPTION The UTC LR9272 is a typical LDO (linear regulator) with the features of high output voltage accuracy, low supply current, low ON-resistance, super low dropout, 1A output current capability, and high ripple rejection. During operation of the UTC LR9272, the dropout voltage is very low, Even the output voltage is set at 1.5V, on resistance of internal FET is typically 0.32Ω. Therefore, applications that require a large current at small dropout are suitable for the UTC LR9272 series. Low input voltage is acceptable and low output voltage can be set. The minimum input voltage is 1.4V, and the lowest set output voltage is 0.8V, and the response of line transient and load transient are very well. Internally, there’re many functions of UTC LR9272 which can be seen in the block figure. There are a voltage reference unit, an error amplifier, resistor-net for voltage setting, a current limit circuit, and a chip enable circuit in each UTC LR9272. The UTC LR9272 can be used as an ideal of the power supply for hand-held communication equipment, such as: power source for portable communication equipment, power source for electrical appliances, for example, cameras, VCRs and camcorders and power source for battery-powered equipment. FEATURES * Low standby current (TYP=0.1µA) * Ultra-Low supply current (TYP=60µA) * Output current (MIN=1A@VIN=VOUT+1.0V) * Output voltage accuracy (±2.0%) * Input voltage range (1.4V~6.0V) * Output voltage (0.8V~5.0V) * Dropout voltage (TYP=0.18V@VOUT=3.0V, IOUT=1A) * Ripple rejection (TYP=70dB @ VOUT=3.0V) * Line regulation (TYP=0.05%/V) * Low temperature-drift coefficient of output voltage * Built-in thermal shuntdown circuit * Built-in inrush current limit circuit * Built-in fold-back protection circuit * Built-in auto discharge function ORDERING INFORMATION Ordering Number Note: Package LR9272G-xx-AA3-C-R SOT-223 LR9272G-xx-AF5-R SOT-25 xx: Output Voltage, refer to Marking Information. www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd Pin Assignment Pin Code 1 2 3 C G I O Refer to PIN CONFIGURATION Packing Tape Reel Tape Reel 1 of 5 QW-R102-067.a LR9272 Preliminary CMOS IC MARKING INFORMATION PACKAGE VOLTAGE CODE MARKING Pin Code Voltage Code SOT-223 25: 2.5V 33: 3.3V 50: 5.0V LR9272 XX 1 2 G Discharge Function Date Code 3 SOT-25 PIN CONFIGURATION(For SOT-25) PIN DESCRIPTION(For SOT-25) PIN NO. 1 2 3 4 PIN NAME VOUT GND VDD NC 5 CE or CE DESCRIPTION Voltage regulator output pin Ground pin Input pin No connection Chip enable pin UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R102-067.a LR9272 Preliminary CMOS IC BLOCK DIAGRAM LR9272A VDD VOUT + Vref current limit/inrush current limit/thermal shutdown GND CE LR9272B VDD VOUT + Vref current limit/inrush current limit/thermal shutdown CE UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw GND 3 of 5 QW-R102-067.a LR9272 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING (TA= 25°C, unless otherwise specified) PARAMETER Input Voltage Input Voltage( CE or CE Input Pin) SYMBOL VIN RATINGS 6.5 UNIT V VCE -0.3~6.5 V Output Voltage VOUT -0.3~VIN+0.3 V Power Dissipation PD 420 mW Operating Temperature TOPT -40~85 °C Storage Temperature TSTG -55~125 °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. ELECTRICAL CHARACTERISTICS (TA= 25°C, unless otherwise specified) LR9272A/B-xx PARAMETER Input Voltage Supply Current Standby Current SYMBOL VIN ISS ISTB Output Voltage Load Regulation VOUT ∆VOUT/∆IOUT Dropout Voltage Line Regulation VDIF ∆VOUT/∆VIN Ripple Rejection Output Voltage Temperature Coefficient Output Current Short Current Limit Pull-Down resistance for CE pin CE Input Voltage “H” CE Input Voltage “L” Thermal Shutdown Temperature Thermal Shutdown Released Temperature Output Noise RR TEST CONDITIONS MIN 1.4 VIN-VOUT=1.0V, VIN=VCE, IOUT=0A VIN=6.0V, VCE=0V VIN-VOUT=1.0V, VOUT>1.5V x0.98 IOUT=100mA -30 VOUT≤1.5V VIN-VOUT=0.3V, 1mA≤IOUT≤300mA, -15 If VOUT≤1.1V, then VIN=1.4V VIN-VOUT=0.3V, 1mA≤IOUT≤1A, If VOUT≤1.1V, then VIN=1.7V IOUT=300mA 0.8≤VOUT<0.9 IOUT=1A IOUT=300mA 0.9≤VOUT<1.0 IOUT=1A IOUT=300mA 1.0≤VOUT<1.5 IOUT=1A IOUT=300mA 1.5≤VOUT<2.6 IOUT=1A IOUT=300mA 2.6≤VOUT IOUT=1A IOUT=100mA, VOUT+0.5V≤VIN≤6.0V, If VOUT≤0.9V, 1.4V≤VIN≤6.0V f=1kHz, (VOUT≤4.0V) f=1kHz, (VOUT>4.0V), Ripple 0.5Vp-p, VIN-VOUT=1.0V, IOUT=100mA, If VOUT≤1.2V, VIN-VOUT=1.5V, IOUT=100mA ∆VOUT/∆TOPT IOUT=100mA, -40°C≤TOPT≤ 85°C ILIM ISC 60 0.1 15 MAX UNIT 6.0 V 100 µA 1.0 µA x1.02 V +30 mV 30 50 0.33 0.72 0.22 0.64 0.18 0.56 0.10 0.32 0.05 0.18 0.57 0.05 0.20 0.47 0.32 0.15 0.10 1.9 VCEH VCEL 1.0 0 V V V V V V V V V V %/V 70 dB 60 dB ppm /°C A mA 1 500 RPD mV mV ±100 VIN-VOUT=1.0V VOUT=0V 5.0 15.0 MΩ 6.0 0.4 V V TTSD Junction Temperature 150 °C TTSR Junction Temperature 120 °C BW=10Hz~100kHz 30 μVrms en UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TYP 4 of 5 QW-R102-067.a LR9272 Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT 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-R102-067.a