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| AQT104 Quik LDO 2.5V or Adjustable, No Output Cap, Low Dropout Regulator Preliminary Design Specification General Description The Quik LDOTM AQT104 is a low dropout regulator that requires no external output capacitor for stability and it is stable with any capacitive load. It offers 0.5 Ohms pass device with 500mA load current. Its output voltage is preset to values between 2V and 3.3V with 1% accuracy and presents very good line and load regulation. It also includes output current limit with foldback characteristic and thermal shutdown. The removal of the output capacitor allows cost and board space reduction along with energy saving at power on and off. It is best suited for battery-powered equipments and in particular for cellular phones. Revision 0.5, May 2, 2003 Applications * * * * * * * * * * * * * * Cordless and cellular phones Medical equipment PDAs and battery-powered equipments Features No need for output capacitor 500mA output current 150mV drop at 300mA Preset output voltages (1% accuracy) Low current consumption Foldback output current limitation Thermal Shutdown Excellent load and line regulation Low noise Fast turn on and off SOT23 package Block Diagram Pin Configuration Quik LDOTM technology is patent pending. Quik LDOTM is a trademark of Acutechnology Semiconductor Inc. Quik LDOTM is not a typo - with a Quik LDOTM you eliminate a "C". Acutechnology Semiconductor Inc. www.acutechnology.com Acutechnology Semiconductor Inc. AQT104 Quik LDOTM Pin Description Pin 1 2 3 4 5 Pin Name VIN GND ENABLE ADJ/CBY VOUT Function Regulator Input. Ground Enable Output voltage adjust Regulator output Absolute Maximum Ratings VIN Voltage ................................................ 7V VIN Current............................................... 1A Operating Junction Temperature ............... 150C Lead Temperature (soldering 10 seconds). 260C Storage Temperature Range ...................... -65C to +150C Electrical Specifications Electrical characteristics are guaranteed by design over the full temperature range -40C Conditions Min 2 Typ Max 6 Units V mA mA % 0.1 700 0.2 850 1.5 2.5 Over Temperature Line regulation Load Regulation Thermal Shut-down Temperature Thermal Shut down Hysteresis Dropout Voltage Reference Power Supply Rejection Output Voltage Noise EN Input Low Voltage EN Input High Voltage Shutdown Current Vin=5V EN=0V 2 10 Iout=300mA Freq.=120Hz f=10Hz to 100KHz (no caps) Vout=2.5V VIN=(Vout+0.1V) to 6V Iout=20mA Iout=1 mA to 500mA 1.5 5 160 20 150 60 150 3 10 mV mV C 180 mV dB uVrms 0.8 V V 300 nA Acutechnology Semiconductor Inc. Preliminary Design Specification AQT104 Rev 05, May 2, 2003 www.acutechnology.com Page 2 of 4 Acutechnology Semiconductor Inc. AQT104 Quik LDOTM Typical Response 2.62 2.58 OUT / V 2.54 2.5 2.46 2.42 Output current / mA 450 350 250 150 50 0 100 200 300 400 500 600 Time/Secs 100Secs/div Load transient (current step=500mA). No output capacitor!! Enable signal / V 4.5 3.5 2.5 1.5 0.5 2.5 2 OUT / V 1.5 1 0.5 00 100 200 300 400 500 600 Time/Sec s 100Sec s /div Turn on and off transient response. Acutechnology Semiconductor Inc. Preliminary Design Specification AQT104 Rev 05, May 2, 2003 www.acutechnology.com Page 3 of 4 Acutechnology Semiconductor Inc. AQT104 Quik LDOTM Package Mechanical Details SOT23-5 DIM A A1 A2 b C D E E1 e e1 L a 0.10 0 Millimetres MIN 0.90 0.00 0.90 0.35 0.09 2.80 2.60 1.50 0.95 REF 1.90 REF 0.60 10 0.004 0 Inches MIN 0.035 0.00 0.035 0.014 0.0035 0.110 0.102 0.059 0.037 REF 0.075 REF 0.024 10 MAX 1.45 0.15 1.3 0.50 0.20 3.00 3.00 1.75 MAX 0.057 0.006 0.051 0.020 0.008 0.118 0.118 0.069 Contact information Acutechnology Semiconductor Inc. 3487 McKee Rd. Suite 52 San Jose CA 95127 USA TEL:(408) 259-2300 (408) 259-3400 FAX:(408) 259-9160 e-mail:info@acutechnology.com Acutechnology Semiconductor Inc. Preliminary Design Specification AQT104 Rev 05, May 2, 2003 www.acutechnology.com Page 4 of 4 |
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