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AIC1553CVBG Datasheet(PDF) 1 Page - Analog Intergrations Corporation |
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AIC1553CVBG Datasheet(HTML) 1 Page - Analog Intergrations Corporation |
1 / 9 page AIC1553 Compact 500KHz PWM/PFM, Step-Down DC/DC Converters Analog Integrations Corporation 4F, 9 Industry E. 9th Rd, Science-Based Industrial Park, Hsinchu, Taiwan DS-1553-P2 061402 TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw 1 FEATURES Tiny 5-Lead SOT-23 package Uses Tiny Capacitors and Inductor High Frequency Operation: 500KHz High Output Current: 500mA Low RDS(ON) Internal Switch: 0.6Ω High Efficiency: Up to 90% Current Mode Operation for Excellent Line and Load Transient Response Short-Circuit Protected Low Quiescent Current: 22 µA Low Dropout Operation: 100% Duty Cycle Ultralow Shutdown Current: IQ < 1µA Peak Inductor Current Independent of Inductor Value Low Output Voltages: Down to 0.75V APPLICATIONS Cellular Phones. PDAs and Handy-Terminals. CPU I/O Supplies. Cordless Phones. Notebook Chipset Supplies. Handheld Equipment DESCRIPTION The AIC1553 is a step-down, current mode, DC/DC converter. It operates from 2.5V to 5.5V input voltage range and switches at 500KHz, allowing the use of tiny, low cost capacitors and inductors. The output voltage is adjustable from 0.75V to 5V. A built-in 0.6 Ω switch allows up to 0.5A of output current at high efficiency. The AIC1553 operates continuously to very low load currents to provide low ripple at the expense of light load efficiency. With no load, the AIC1553 draws only 22 µA. In shutdown mode, it draws less than 1 µA, making it ideal for current sensitive applications. The tiny 5-lead SOT-23 package makes it easy to save the layout area. TYPICAL APPLICATION CIRCUIT SW 1 GND 2 VFB 3 VIN 5 SD 4 U1 AIC1553 VIN + C1 10 µF L1 6.8 µH R2 560K R1 240K C2 47 µF C3 D1 SS12 C4 4.7 µF VOUT ON/OFF 2.5V 2.5V~5.5V 22pF 2.5V/500mA Step-Down Converter |
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