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RT9177-31CBR Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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RT9177-31CBR Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers |
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1 / 12 page  Preliminary RT9177 DS9177-00 Feb. 2001 www.richtek-ic.com.tw 1 Ultra-Low-Noise 200mA LDO Regulator General Description The RT9177 is a 200mA low dropout and low noise micro-power regulator suitable for portable RF applications. The output voltage accuracy within ±2% and range from 2.4V to 3.2V in 100mV increments could be selected. It is designed for using very low ESR output capacitor. Its output remains stable even in using 1 µF ceramic as its output capacitor. Using an internal PMOS as the pass device cause that don’t need extra GND current in heavy load and dropout conditions. In shutdown mode, nearly zero operation current cause the IC is suitable for battery-power devices. Other features including current limiting, over temperature protection and adding a capacitor in bypass pin to improve its noise performance are functional. Ordering Information RT9177- Features Ultra-Low-Noise(150nV/ Hz ) for RF Application 1 µµµµF Ceramic COUT Stable Low Dropout Voltage(220mV @ 200mA) Low Operation Current - 80 µµµµA Typical Shutdown Function Low Temperature Coefficient Current and Thermal Limiting Custom Voltage Available SOT-25 Package Applications Cellular Telephones Laptop, Notebook, and Palmtop Computers Battery-powered Equipment Hand-held Equipment Pin Configurations Part Number Pin Configurations RT9177- CB (Plastic SOT-25) 1. IN 2. GND 3. SHDN 4. BP 5. OUT RT9177- CBR (Plastic SOT-25) 1. OUT 2. GND 3. IN 4. SHDN 5. BP Typical Application Circuit 5 4 3 2 1 TOP VIEW 5 4 3 2 1 TOP VIEW C: Commercial standard B Operating temperature range Package type : SOT-25 Type I BR : SOT-25 Type II Output voltage 24 : 2.4V 25 : 2.5V : : 31 : 3.1V 32 : 3.2V RT9177 ON OFF GND IN OUT VOUT CBP 10nF COUT 1µF VIN CIN 1µF SHDN |
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