Maker : Maxim
Part No. : MAX1606EUA

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Product Information

19-1744; Rev 0; 7/00 28V Internal Switch LCD Bias Supply with True Shutdown General Description The MAX1606 is a step-up DC-DC converter that contains a 0.5A internal power switch and a 0.5A output isolation switch in an 8-pin µMAX package. The IC operates from a 2.4V to 5.5V supply voltage but can boost battery voltages as low as 0.8V up to 28V. The MAX1606 uses a unique control scheme that provides high efficiency over a wide range of load conditions. An internal 0.5A MOSFET reduces external component count, and a high switching frequency (up to 500kHz) allows for tiny surface-mount components. The current limit can be set to 500mA, 250mA, or 125mA, allowing the user to reduce the output ripple and component size in low-current applications. Additional features include a low quiescent supply current and a true shutdown mode that saves power by disconnecting the output from the input. The MAX1606 is ideal for small LCD panels with low current requirements but can also be used in other applications. A MAX1606 evaluation kit is available to help speed up design time. o Adjustable Output Voltage up to 28V o 20mA at 20V from a Single Li+ Battery o True Shutdown (Output Disconnected from Input) o Output Short-Circuit Protection o 88% Efficiency o Up to 500kHz Switching Frequency o Selectable Inductor Current Limit (125mA, 250mA, or 500mA) o 0.1µA Shutdown Current o 8-Pin µMAX Package Features MAX1606 ________________________Applications LCD Bias Generators Cellular or Cordless Phones Palmtop Computers Personal Digital Assistants (PDAs) Organizers Handy Terminals PART MAX1606EUA Ordering Information TEMP. RANGE -40°C to +85°C PIN-PACKAGE 8 µMAX Typical Operating Circuit Pin Configuration VIN = 0.8V TO 5.5V SW BATT MAX1606 LX VOUT = VIN TO 28V TOP VIEW BATT FB VCC GND 1 2 3 4 8 SW SHDN LIM LX VCC = 2.4V TO 5.5V MAX1606 7 6 5 VCC LIM FB ON OFF SHDN GND µMAX ________________________________________________________________ Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. 28V Internal Switch LCD Bias Supply with True Shutdown MAX1606 ABSOLUTE MAXIMUM RATINGS VCC, FB, BATT, SW to GND .....................................-0.3V to +6V BATT to SW ..............................................................-0.3V to +6V SHDN, LIM to GND.....................................-0.3V to (VCC + 0.3V) LX to GND ..............................................................-0.3V to +30V Current into LX or BATT..............................................600mARMS Current out of SW .......................................................600mARMS Output Short-Circuit Duration ........................................Indefinite Continuous Power Dissipation (TA = +70°C) 8-Pin µMAX (derate 4.1mW/°C above +70°C) .............330mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VCC = 3.3V, VCC = BATT = SHDN, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER VCC Supply Voltage BATT Input Voltage Range VCC Undervoltage Lockout VCC Quiescent Supply Current VCC Shutdown Supply Current BATT Input Supply Current BATT Shutdown Supply Current VCC Line Regulation BATT Line Regulation Load Regulation Efficiency Fee...

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