AIC1880

AIC1880 Low Noise, Step-Up PWM DC/DC Converter FEATURES 90% High Efficiency 1.6A, 0.3Ω, 12V Internal Power MOSFET 640kHz/1.2MHz Pin-Selectable Operation Frequency 2.6V to 5.5V Input Range Low Shutdown Current: 0.1µA Programmable Soft-Start External Compensation Network Adjustable Output from VIN to 11V Thin 8-Pin MSOP Package APPLICATIONS TFT Bias Supplies Handheld Devices PCMCIA Cards Portable Equipment DESCRIPTION The AIC1880 is a step-up DC/DC converter with a 1.6A, 0.3Ω internal power switch. A soft-start programmed with an external capacitor sets the input current ramp rate. Pin-selectable high switching frequency (640kHz or 1.2MHz) allows easy filtering and low noises. An external compensation pin gives users flexibility in setting frequency compensation, which makes it feasible to use the small, low ESR ceramic output capacitors. The AIC1880 converts input ranging 2.6V to 5.5V into output voltage up to 11V. The device is available in a low profile 8-lead MSOP package. TYPICAL APPLICATION CIRCUIT 3.3V Cin 10uF 1.2MHz 640kHz ON OFF Ccomp2 20pF L 6.8uH U1 6 VIN LX 7 FREQ GND 3 SHDN FB 1 COMP SS 5 4 2 8 Rcomp AIC1880 33k Ccomp 1200pF D SS24 Css 0.022uF 10V Cout R1 10uF 1.6M R2 220k Analog Integrations Corporation Si-Soft Research Center 3A1, No.1, Li-Hsin Rd. I, Science Park, Hsinchu 300, Taiwan, R.O.C. TEL: 886-3-5772500, FAX: 886-3-5772510 www.analog.com.tw DS-1880P-01 101706 1 AIC1880 ORDERING INFORMATION AIC1880PX XX PACKING TYPE TR: TAPE ...