AIC1640-30CN

ADVANCE INFORMATION AIC1640 LOW VOLTAGE STEP-UP DC/DC CONVERTER SPEC NO: DS-1640-P1 ■ FEATURES Guaranteed Start-Up from Below 0.9 V. High Efficiency. Low Quiescent Current. Fixed or adjustable Output Voltage. Logic Controlled Shutdown. External Switch Driver available. ■ DESCRIPTION The AIC1640 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 3V, 3.3V, or 5V. Pulse Frequency Modulation scheme brings optimized performance for applications with light output loading and low input voltage. The output ripple ■ APPLICATIONS Pagers. Cameras. W ireless Microphones. Pocket Organizers. Battery Backup Suppliers. Portable Instruments. and noise are lower compared with the circuit operating in PSM mode. The AIC1640 starts up from below 0.9V input to boost either 3V, 3.3V, or 5V output with 1mA load. Some useful features include external driver for higher power level applications, shutdown mode for saving the life of battery, and adjustable output version. The PFM control circuit operates in 100KHz (max.) switching rate, resulting in smaller passive component size, which makes the AIC1640 an ideal choice of DC/DC converter for space conscious applications. ■ TYPICAL APPLICATION CIRCUIT + VOUT 3.3V/100mA C1 22µF + VOUT 3.3V C2 100µ F VDD CE NC NC GND VDD D1 SB02-03C EXT SW VIN ≧0.9V L1 88µH NC AIC1640 CE NC NC GND VIN ≧0.9V L1 33µ H D1 1N5819 C1 10nF R1 300 EXT SW NC Q1 2SD2150 AIC1640 3.3V Output Step-Up DC/DC Converter 3.3V/100mA Step-Up DC/DC Converter ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 1 AIC1640 LOW VOLTAGE STEP-UP DC/DC CONVERTER SPEC NO: DS-1640-P1 ■ ORDERING INFORMATION AIC1640-XXXX PACKAGE TYPE N: PLASTIC DIP S: SMALL OUTLINE TEMPERATURE RANGE C=0 ° C ～ +70 ° C OUTPUT VOLTAGE DEFAULT: ADJUSTABLE 30: 3.0V 33: 3.3V 50: 5.0V ORDER NUMBER A IC1640-XXCN (PLASTIC DIP) PIN CONFIGURATION TOP VIEW VDD 1 EXT 2 3 8 CE 7 NC 6 NC 5 GND A IC1640-XXCS (PLASTIC SO) SW *NC/FB 4 *Fixed Output Voltage: NC Adjustable Output Voltage:FB ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 2