AIC1638

AIC1638 3-PIN ONE-CELL STEP-UP DC/DC CONVERTER SPEC NO: DS-1638-00 03/01/00
FEATURES ! ! ! ! ! ! !
DESCRIPTION The AIC1638 is a high efficiency step-up DC/DC converter for applications using 1 to 4 NiMH battery cells. Only three external components are required to deliver a fixed output voltage of 2.7V, 3.0V, 3.3V, or 5V. The AIC1638 starts up from below 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 AIC1638 an ideal choice of DC/DC converter for space conscious applications, like pagers, electronic cameras, and wireless microphones Guaranteed Start-Up from below 0.9 V. High Efficiency. Low Quiescent Current. Few Number of External Components needed. Low Ripple and Low Noise. Fixed Output Voltage: 2.7V, 3.0V, 3.3V, and 5V. Space Saving SOT-89 and TO-92 Packages.
APPLICATIONS ! ! ! ! ! ! Pagers. Cameras. Wireless Microphones. Pocket Organizers. Battery Backup Suppliers. Portable Instruments.
TYPICAL APPLICATION CIRCUIT VIN + C2 47µF L1 88µH D1 VOUT SW AIC1638-27 AIC1638-30 AIC1638-33 AIC1638-50 GND VOUT + C1 22µF One Cell Step-Up DC/DC Converter ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Scienc...