Click here for production status of specific part numbers. MAX1605 30V Internal Switch LCD Bias Supply General Description Features The MAX1605 boost converter contains a 0.5A internal Adjustable Output Voltage up to 30V switch in a tiny 6-pin SOT23 package. The IC operates 20mA at 20V from a Single Li+ Battery from a +2.4V to +5.5V supply voltage, but can boost 88% Efficiency battery voltages as low as 0.8V up to 30V at the output. Up to 500kHz Switching Frequency The MAX1605 uses a unique control scheme providing the Selectable Inductor Current Limit highest efficiency over a wide range of load conditions. (125mA, 250mA, or 500mA) An internal 0.5A MOSFET reduces external component 18A Operating Supply Current count, and a high switching frequency (up to 500kHz) 0.1A Shutdown Current allows for tiny surface-mount components. The current Available in Two Small Packages limit can be set to 500mA, 250mA, or 125mA, allowing 6-Pin TDFN the user to reduce the output ripple and component size in low-current applications. 6-Pin SOT23 Additional features include a low quiescent supply current and a shutdown mode to save power. The Ordering Information MAX1605 is ideal for small LCD panels with low current requirements, but can also be used in other applications. TEMP PIN- SOT PART A MAX1605EVKIT evaluation kit (EV kit) is available to RANGE PACKAGE MARK help speed up design time. MAX1605EUT+T -40C to +85C 6 SOT23-6 AAHP Applications MAX1605ETT+T -40C to +85C 6 TDFN ABW LCD Bias Generators Cellular/Cordless Phones Palmtop Computers Typical Operating Circuit Personal Digital Assistants (PDAs) L1 Organizers 10H V = 0.8V TO V IN OUT Handy Terminal Pin Configuration V = V TO 30V OUT IN V = 2.4V TO 5.5V CC V LX CC TOP VIEW MAX1605 SHDN 1 6 FB SHDN FB 1 6 LIM FB MAX1605 MAX1605 V 2 5 LIM V LIM CC CC 2 5 ON SHDN GND OFF LX GND 3 4 GND 3 4 LX SOT23 TDFN (3mm x 3mm) 19-1666 Rev 2 8/18MAX1605 30V Internal Switch LCD Bias Supply Absolute Maximum Ratings V , FB, LIM, SHDN to GND .................................-0.3V to +6V Operating Temperature Range ........................... -40C to +85C CC LX to GND .............................................................-0.3V to +32V Junction Temperature ......................................................+150C Continuous Power Dissipation (T = +70C) Storage Temperature Range ............................ -65C to +150C A 6-Pin SOT23 (derate 8.7mW/C above +70C) ..........696mW Lead Temperature (soldering, 10s) .................................+300C 6-Pin TDFN (derate 24.4mW/C above +70C) ........1951mW 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 (V = SHDN = 3.3V, T = 0C to +85C, unless otherwise noted. Typical values are at T = +25C.) (Note 1) CC A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Note 2) 2.4 5.5 V CC Inductor Input Voltage Range V (Note 2) 0.8 V V IN OUT V Undervoltage Lockout V V falling, 50mV typical hysteresis 2.0 2.2 2.37 V CC UVLO CC Quiescent Supply Current I V = 1.3V 18 35 A CC FB Shutdown Supply Current SHDN = GND 0.1 1 A V = 18V, I = 1mA, V = 5V, OUT LOAD IN V Line Regulation V 0.1 %/V CC LNR V = V = 2.4V to 5.5V CC LIM V = 18V, I = 1mA, OUT LOAD V Line Regulation V 0.15 %/V IN LNR V = V = 5V, V = 2.4V to 12V CC LIM IN V = 18V, V = V = V = 5V, OUT CC IN LIM Load Regulation V 0.1 %/mA LDR I = 0mA to 20mA LOAD Efficiency L1 = 100H, V = 3.6V, I = 10mA 88 % IN LOAD Feedback Set Point V 1.225 1.25 1.275 V FB Feedback Input Bias Current I V = 1.3V 5 100 nA FB FB LX LX Voltage Range V 30.5 V LX LIM = V 0.40 0.50 0.56 CC LX Switch Current Limit I LIM = floating 0.20 0.25 0.285 A LX(MAX) LIM = GND 0.10 0.125 0.15 V = 5V, I = 100mA 0.8 CC LX LX On-Resistance R LX V = 3.3V, I = 100mA 1 2 CC LX LX Leakage Current V = 30.5V 2 A LX Maximum LX On-Time t 10 13 16 s ON V > 1.1V 0.8 1.0 1.2 FB Minimum LX Off-Time t s OFF V < 0.8V (soft-start) 3.9 5.0 6.0 FB Maxim Integrated 2 www.maximintegrated.com