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MAX1763 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX1763 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 16 page General Description The MAX1763 is a high-efficiency, low-noise, step-up DC-DC converter intended for use in battery-powered wireless applications. This device maintains exception- ally low quiescent supply current (110µA) despite its high 1MHz operating frequency. Small external compo- nents and a tiny package make this device an excellent choice for small hand-held applications that require the longest possible battery life. The MAX1763 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 one to three alkaline or NiCd/NiMH cells or a single Lithium-ion (Li+) cell. Maxim's propri- etary Idle Mode™ circuitry significantly improves effi- ciency at light load currents while smoothly transitioning to fixed-frequency PWM operation at higher load cur- rents to maintain excellent full-load efficiency. Low- noise, forced-PWM mode is available for applications that require constant-frequency operation at all load currents. The MAX1763 may also be synchronized to an external clock to protect sensitive frequency bands in communications equipment. The MAX1763 includes an on-chip linear gain block that can be used to build a high-power external linear regulator or as a low-battery comparator. Soft-start and current limit functions permit optimization of efficiency, external component size, and output voltage ripple. The MAX1763 is available in a space-saving 16-pin QSOP package or a high-power (1.5W) 16-pin TSSOP- EP package. Features ♦ Up to 94% Efficiency ♦ +0.7V to +5.5V Input Voltage Range ♦ 1.1V Guaranteed Startup Input Voltage ♦ Up to 1.5A Output ♦ Fixed 3.3V Output or Adjustable (2.5V to 5.5V) ♦ 1MHz PWM Synchronous-Rectified Topology ♦ 1µA Logic-Controlled Shutdown ♦ Analog Gain Block for Linear-Regulator or Low- Battery Comparator ♦ Adjustable Current Limit and Soft-Start ♦ 1.5W TSSOP Package Available 1.5A, Low-Noise, 1MHz, Step-Up DC-DC Converter ________________________________________________________________ Maxim Integrated Products 1 Pin Configuration 19-1698; Rev 2; 4/11 Ordering Information +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad Idle Mode is a trademark of Maxim Integrated Products. PART TEMP RANGE PIN-PACKAGE MAX1763EEE+ -40°C to +85°C 16 QSOP MAX1763EUE+ -40°C to +85°C 16 TSSOP-EP* Digital Cordless Phones PCS Phones Wireless Handsets Hand-Held Instruments Palmtop Computers Personal Communicators Typical Operating Circuit ON OFF PWM OFF ON ONB ONA LX POUT OUT CLK/SEL AO GND PGND FB ISET REF MAX1763 OR NORMAL AIN LBI OR GAIN BLOCK INPUT 1.5 μH IN 0.7V TO 5.5V LBO OR GAIN BLOCK OUTPUT OUT 3.3V AT 1.5A ________________________Applications 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 ONA ONB POUT LX POUT PGND LX PGND CLK/SEL TOP VIEW MAX1763 QSOP TSSOP-EP ISET REF OUT GND FB AIN AO For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. EVALUATION KIT AVAILABLE |
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