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MAX1700 Fiches technique(PDF) 1 Page - Maxim Integrated Products |
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MAX1700 Fiches technique(HTML) 1 Page - Maxim Integrated Products |
1 / 16 page General Description The MAX1700/MAX1701 are high-efficiency, low-noise, step-up DC-DC converters intended for use in battery- powered wireless applications. They use a synchro- nous-rectified pulse-width-modulation (PWM) boost topology to generate 2.5V to 5.5V outputs from battery inputs such as one to three NiCd/NiMH cells or one Li- Ion cell. Both devices have an internal 1A, 130m Ω N- channel MOSFET switch and a 250m Ω P-channel synchronous rectifier. With their internal synchronous rectifier, the MAX1700/ MAX1701 deliver 5% better efficiency than similar non- synchronous converters. They also feature a pulse- frequency-modulation (PFM) standby mode to improve efficiency at light loads, and a 3µA shutdown mode. The MAX1700/MAX1701 come in 16-pin QSOP pack- ages (which occupy the same space as an 8-pin SO). The MAX1701 includes two comparators to generate power-good and low-battery warning outputs. It also contains a gain block that can be used to build a linear regulator using an external P-channel pass device. For higher-power outputs, refer to the MAX1703. For dual outputs (step-up and linear regulator), refer to the MAX1705/MAX1706. For an on-board analog-to-digital converter, refer to the MAX848/MAX849. The MAX1701 evaluation kit is available to speed design time. Applications Digital Cordless Phones Personal Communicators PCS Phones Palmtop Computers Wireless Handsets Hand-Held Instruments Two-Way Pagers Features o Up to 96% Efficiency o 1.1 VIN Guaranteed Start-Up o 0.7V to 5.5V Input Range o Up to 800mA Output o Step-Up Output (adjustable from 2.5V to 5.5V) o PWM/PFM Synchronous-Rectified Topology o External Clock or Internal 300kHz Oscillator o 3µA Logic-Controlled Shutdown o Power-Good Output (MAX1701) o Low-Battery Comparator (MAX1701) o Uncommitted Gain Block (MAX1701) 1-Cell to 3-Cell, High-Power (1A), Low-Noise, Step-Up DC-DC Converters ________________________________________________________________ Maxim Integrated Products 1 PGND GND FB ONA REF ONB POUT LX OUT ON INPUT 0.7V TO 5.5V OR OFF OFF ON SYNC PWM PFM OUTPUT 3.3V OR ADJ UP TO 800mA CLK/SEL MAX1700 Pin Configurations TOP VIEW 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 I.C. I.C. POUT OUT LX PGND FB I.C. I.C. I.C. = INTERNAL CONNECTION. LEAVE OPEN OR CONNECT TO GND MAX1700 QSOP I.C. REF I.C. CLK/SEL GND ONB ONA Typical Operating Circuit 19-4759; Rev 1; 1/99 PART MAX1700EEE -40°C to +85°C TEMP. RANGE PIN-PACKAGE 16 QSOP EVALUATION KIT MANUAL FOLLOWS DATA SHEET Ordering Information MAX1701EEE -40°C to +85°C 16 QSOP Pin Configurations continued at end of data sheet. For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. |
Numéro de pièce similaire - MAX1700 |
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Description similaire - MAX1700 |
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