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AIC2951D-33CS Datasheet(PDF) 1 Page - Analog Intergrations Corporation |
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AIC2951D-33CS Datasheet(HTML) 1 Page - Analog Intergrations Corporation |
1 / 10 page AIC2951/2951D Low Dropout Linear Regulator Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC www.analog.com.tw DS-2951-01 Mar 13, 00 TEL: 886-3-5772500 FAX: 886-3-5772510 1 n FEATURES l Low Dropout Voltage of 130mV at 100mA Output Current (AIC2951/2951D-50). l Guaranteed 150mA /300mA Output Current. l Internal 1.3 Ω P-MOSFET Draws no Base Current. l Low Ground Current at 55 µA. l 1% Accuracy Output of 3V/3.3V/5V. l Error Flag Warns of Output Dropout. l 1 µA Supply Current in Shutdown Mode. l Output Programmable from 1.235V~11V. l Fast Transient Response. l Needs only 1 µF for Stability. l Current and Thermal Limiting. n APPLICATIONS l Voltage Regulator for Pentium ® CPUs. l Wireless Communication System. l Battery Powered Systems. n DESCRIPTION The AIC2951/ 2951D series is the enhanced CMOS version of the LP2951. The superior char- acteristics of the AIC2951/ 2951D series include zero base current loss, very low dropout voltage, and 1% accuracy output voltage. Typical ground current remains approximately 55 µA, from no load to maximum loading conditions. Dropout voltage at 100mA output current is significantly lower than its bipolar counterpart: 130mV for the AIC2951-50/2951D-50, 180mV for the AIC2951- 33/ 2951D-33, and 200mV for the AIC2951-30/ 2951D-30. Output current limiting and thermal limiting are built in to provide maximal protection to the AIC2951/2951D series from fault condi- tions. An error flag output, indicating when output volt- age drops out of regulation, often due to the falling batteries on the input, can be used for a power-on reset. A logic-controlled shutdown input enables the regulator to be switched on and off. The part may be configured for a fixed output voltage or programmed from 1.235V to 11V with an external pair of resistors. The part comes in 8- pin DIP or SO packages. n TYPICAL APPLICATION CIRCUIT ERROR C2 R2 R1 R3 390 R4 33 Q1 D45H2A AIC2951 8 7 6 5 4 3 2 1 FB GND SENSE SHDN TAP VIN VOUT VIN 470µF VOUT 1000 µF VOUT=1.235(1+R1/R2) + C1 + Pentium Processor Power Supply |
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