MAX860/MAX861 50mA, Frequency-Selectable, Switched-Capacitor Voltage Converters General Description Features The MAX860/MAX861 charge-pump voltage converters 8-Pin, 1.11mm High MAX Package invert input voltages ranging from +1.5V to +5.5V, or double input voltages ranging from +2.5V to +5.5V. Invert or Double the Input Supply Voltage Because of their high switching frequencies, these Three Selectable Switching Frequencies devices use only two small, low-cost capacitors. Their 50mA output makes switching regulators unnecessary, High Frequency Reduces Capacitor Size eliminating inductors and their associated cost, size, 87% Efficiency at 50mA and EMI. Greater than 90% efficiency over most of the load-current range, combined with a typical operating 200A Quiescent Current (MAX860) current of only 200A (MAX860), provides ideal perfor- mance for both battery-powered and board-level volt- 1A Shutdown Supply Current age-conversion applications. 600mV Voltage Drop at 50mA Load A frequency-control (FC) pin provides three switching- frequencies to optimize capacitor size and quiescent 12 Output Resistance current and to prevent interference with sensitive cir- cuitry. Each device has a unique set of three available Ordering Information frequencies. A shutdown (SHDN) pin reduces current consumption to less than 1A. The MAX860/MAX861 PART TEMP RANGE PIN-PACKAGE are suitable for use in applications where the ICL7660 MAX860ISA -25C to +85C 8 SO and MAX660 s switching frequencies are too low. The MAX860/MAX861 are available in 8-pin MAX and MAX860IUA -25C to +85C 8 MAX SO packages. MAX860C/D 0C to +70C Dice* Applications MAX860ESA -40C to +85C 8 SO Portable Computers MAX860MJA -55C to +125C 8 CERDIP Medical Instruments MAX860MSA/PR3 -55C to +125C 8 SO Interface Power Supplies MAX861ISA -25C to +85C 8 SO Hand-Held Instruments MAX861IUA -25C to +85C 8 MAX Operational-Amplifier Power Supplies MAX861C/D 0C to +70C Dice* MAX861ESA -40C to +85C 8 SO Typical Operating Circuit MAX861MJA -55C to +125C 8 CERDIP *Dice are tested at T = +25C, DC parameters only. A INPUT 1 MAX860 8 Contact factory for availability. FC V DD VOLTAGE MAX861 +1.5V TO +5.5V 7 2 C1+ SHDN 3 6 Pin Configuration GND LV INVERTED NEGATIVE C1 10F 4 5 C1- OUT OUTPUT 10F C2 TOP VIEW VOLTAGE INVERTER + INPUT FC 1 8 V DD VOLTAGE DOUBLED 1 8 MAX860 +2.5V TO +5.5V FC V DD POSITIVE MAX860 SHDN C1+ 2 7 MAX861 OUTPUT 2 7 MAX861 C1+ SHDN 10F LV GND 3 6 3 6 C2 GND LV C1- OUT 4 5 C1 10F 4 5 C1- OUT SO/MAX POSITIVE VOLTAGE DOUBLER MAX is a registered trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-0239 Rev 3 8/13MAX860/MAX861 50mA, Frequency-Selectable, Switched-Capacitor Voltage Converters ABSOLUTE MAXIMUM RATINGS Supply Voltage (V to GND or GND to OUT)...................+6.0V Operating Temperature Ranges DD Input Voltage Range (LV, FC, SHDN ) ...................(OUT - 0.3V) MAX86 I A ......................................................-25C to +85C to (V + 0.3V) MAX86 ESA.....................................................-40C to +85C DD Continuous Output Current (OUT, V ) .............................60mA MAX86 M A ..................................................-55C to +125C DD Output Short-Circuit to GND (Note 1).......................................1s Storage Temperature Range .............................-65C to +160C Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A SO (derate 5.88mW/C above +70C).........................471mW Soldering Temperature (reflow) .......................................+240C MAX (derate 4.2mW/C above +70C) ......................362mW CERDIP (derate 8.00mW/C above +70C).................640mW Note 1: OUT may be shorted to GND for 1sec without damage, but shorting OUT to V may damage the device and should be DD avoided. Also, for temperatures above +85C, OUT must not be shorted to GND or V , even instantaneously, or device DD damage may result. 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 (Typical Operating Circuit (Inverter), V = +5V, SHDN= V , FC = LV = GND, C1 = C2 = 10F (Note 2), T = T to T , unless DD DD A MIN MAX otherwise noted. Typical values are at T = +25C.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Inverter, LV = GND 1.5 5.5 Supply Voltage V R = 1k V DD L Doubler, LV = OUT 2.5 5.5 FC = V = 5V 0.2 0.3 DD FC = V = 3V 0.07 DD MAX860I/E FC = GND 0.6 1.0 FC = OUT 1.4 2.5 FC = V 0.4 DD MAX860M FC = GND 1.3 No-Load Supply Current I FC = OUT 3.3 mA DD (Note 3) FC = V 0.3 0.4 DD MAX861I/E FC = GND 1.1 2.0 FC = OUT 2.5 5.0 FC = V 0.5 DD MAX861M FC = GND 2.6 FC = OUT 6.5 V = 5V, V more negative than -3.75V 50 100 DD OUT Output Current I mA OUT V = 3V, V more negative than -2.5V 10 30 DD OUT I = 50mA 12 25 Output Resistance L R OUT (Note 4) I = 10mA, V = 2V 20 35 L DD 2 Maxim Integrated