AIC1642 Datasheet | Analog Intergrations Corporation

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 ponents 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 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 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 ponents 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-Based Industrial Park, Hsinchu, Taiwan TEL: 886-3-5772500 FAX: 886-3-5772510 .analog..tw DS-1642-01 012102 ¡½ ORDERING INFORMATION AIC1642-XXCXXX PACKING TYPE TR: TAPE & REEL TB: TUBE BG: BAG PACKAGE TYPE X: SOT-89 Z: TO-92 OUTPUT VOLTAGE 27: 2.7V 30: 3.0V 33: 3.3V 50: 5.0V Example: AIC1642-27COTR à 2.7V Version, in MSOP8 Package & Tape & Reel Packing Type PIN CONFIGURATION SOT-89 TOP VIEW 1: GND 2: VOUT 3: SW 1 2 3 TO-92 TOP VIEW 1: GND 2: VOUT 3: SW 1 2 3 ¡½ ABSOLUATE MAXIMUM RATINGS Supply Voltage SW pin Voltage … … … … … … … … … … … … …...