AIC1638 Datasheet | Analog Intergrations Corporation

FEATURES ! ! ! ! ! ! ! DESCRIPTION The AIC1638 is a high efficiency step-up DC/DC converter for applications using 1 to 4 Ni MH battery cells. Only three external ponents 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 1m A 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 pared with the circuits operating in PSM mode. The PFM control circuit operating in 100KHz (max.) switching rate results in smaller passive ponents. 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 ponents 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 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, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. .analog..tw TEL: (8863)577-2500 FAX:(8863)577-2510 3-PIN ONE-CELL STEP-UP DC/DC CONVERTER SPEC NO: DS-1638-00 03/01/00 ORDERING INFORMATION AIC1638- XXX ORDER NUMBER PACKAGE TYPE X: SOT-89 Z: TO-92 TEMPERATURE RANGE C: -20 ° C +80 ° C OUTPUT VOLTAGE 27: 2.7V 30: 3.0V 33: 3.3V 50: 5.0V AIC1638-27CZ AIC1638-30CZ AIC1638-33CZ AIC1638-50CZ (TO-92) AIC1638-27CX AIC1638-30CX AIC1638-33CX AIC1638-50CX (SOT-89) PIN CONFIGURATION TOP VIEW 1: GND 2: VOUT 3: SW TOP VIEW 1: GND 2: VOUT 3: SW 1 2 3 ABSOLUATE...