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MAX1760EUB Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX1760EUB Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 12 page General Description The MAX1760 is a high-efficiency, low-noise, step-up DC-DC converter intended for use in battery-powered wireless applications. It maintains exceptionally low qui- escent supply current (100µA) despite its high 1MHz operating frequency. Small external components and a tiny 10-pin µMAX package make this device an excel- lent choice for small hand-held applications requiring the longest possible battery life. The MAX1760 uses a synchronous-rectified pulse- width-modulation (PWM) boost topology to generate 2.5V to 5.5V outputs from a wide range of input sources, such as 1 to 3 alkaline or NiCd/NiMH cells or a single lithium-ion (Li+) cell. Maxim's proprietary Idle- Mode™ circuitry significantly improves efficiency at light load currents while smoothly transitioning to fixed- frequency PWM operation at higher load currents to maintain excellent full-load efficiency. Low-noise, forced PWM mode is available for applica- tions requiring constant-frequency operation at all load currents. The MAX1760 may also be synchronized to an external clock to protect sensitive frequency bands in communications equipment. Analog soft-start and adjustable current limit permit optimization of efficiency, external component size, and output voltage ripple. Applications Digital Cordless Phones PCS Phones Wireless Handsets Hand-Held Instruments Palmtop Computers Personal Communicators Two-Way Pagers Features o Up to 94% Efficiency o 0.7V to 5.5V Input Range o Up to 800mA Output o Fixed 3.3V Output (or adj from 2.5V to 5.5V) o PWM Synchronous Rectified Topology o Low-Noise, Constant Frequency Operation (1MHz) o 0.1µA Logic-Controlled Shutdown o Synchronizable Switching Frequency o Adjustable Current Limit o Adjustable Soft-Start o 10-Pin µMAX Package 0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter ________________________________________________________________ Maxim Integrated Products 1 1 2 3 4 5 10 9 8 7 6 POUT LX PGND FB GND REF ISET MAX1760 µMAX TOP VIEW CLK/SEL OUT ON PGND FB GND POUT LX ISET OUT REF CLK/SEL INPUT = 0.7V TO VOUT VOUT = 3.3V, 800mA ON MAX1760 Typical Operating Circuit 19-1660; Rev 1; 1/01 PART MAX1760EUB -40°C to +85°C TEMP. RANGE PIN-PACKAGE 10 µMAX EVALUATION KIT AVAILABLE Idle Mode is a trademark of Maxim Integrated Products. Pin Configuration Ordering Information For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. |
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