AIC1642

AIC1642 3-Pin One-Cell Step-Up DC/DC Converter ¡½ FEATURES l l l l l l l ¡½ DESCRIPTION The AIC1642 is a high efficiency step-up DC/DC converter for applications using 1 to 4 battery cells. Only three external components are required to deliver a fixed output voltage of 2.7V, 3.0V, 3.3V, or 5V. The AIC1642 starts up from less than 0.9V input with 1mA load. Pulse Frequency Modulation scheme brings optimized performance for applications with light output loading and low input voltages. The output ripple and noise are lower compared with the circuits operating in PSM mode. The PFM control circuit operating in 100KHz (max.) switching rate results in smaller passive components. The space saving SOT-89 and TO-92 packages make the AIC1642 is an ideal choice of DC/DC converter for space conscious applications, like pagers, electronic cameras, and wireless microphones. A Guaranteed Start-Up from less than 0.9 V. High Efficiency. Low Quiescent Current. Less Number of External Components needed. Low Ripple and Low Noise. Fixed Output Voltage: 2.7V, 3.0V, 3.3V, and 5V. Space Saving Packages: SOT-89 and TO-92 ¡½ l l l l l l APPLICATIONS Pagers. Cameras. Wireless Microphones. Pocket Organizers. Battery Backup Suppliers. Portable Instruments. ¡½ TYPICAL APPLICATION CIRCUIT VIN L1 100µH D1 GS SS12 AIC1642-27 AIC1642-30 AIC1642-33 AIC1642-50 GND VOUT + C2 22µF SW VOUT + C1 47µF One Cell Step-Up DC/DC Converter Analog Integrations Corporation 4F, 9 Industry E. 9th Rd, Science-Base...