Click here for production status of specific part numbers. MAX680/MAX681 +5V to 10V Voltage Converters General Description Features The MAX680/MAX681 are monolithic, CMOS, dual charge- 95% Voltage-Conversion Efficiency pump voltage converters that provide 10V outputs from a 85% Power-Conversion Efficiency +5V input voltage. The MAX680/MAX681 provide both a +2V to +6V Voltage Range positive step-up charge pump to develop +10V from +5V input and an inverting charge pump to generate the -10V Only Four External Capacitors Required (MAX680) output. Both parts have an on-chip, 8kHz oscillator. The No Capacitors Required (MAX681) MAX681 has the capacitors internal to the package, and 500A Supply Current the MAX680 requires four external capacitors to produce Monolithic CMOS Design both positive and negative voltages from a single supply. The output source impedances are typically 150, provid- Ordering Information ing useful output currents up to 10mA. The low quiescent current and high efficiency make this device suitable PART TEMP. RANGE PIN-PACKAGE for a variety of applications that need both positive and MAX680CPA 0C to +70C 8 Plastic DIP negative voltages generated from a single supply. MAX680CSA 0C to +70C 8 Narrow SO The MAX864/MAX865 are also recommended for new designs. The MAX864 operates at up to 200kHz and uses MAX680C/D 0C to +70C Dice smaller capacitors. The MAX865 comes in the smaller MAX680EPA -40C to +85C 8 Plastic DIP MAX package. MAX680ESA -40C to +85C 8 Narrow SO Applications MAX680MJA -55C to +125C 8 CERDIP The MAX680/MAX681 can be used wherever a single MAX681CPD 0C to +70C 14 Plastic DIP positive supply is available and where positive and nega- MAX681EPD -40C to +85C 14 Plastic DIP tive voltages are required. Common applications include generating 6V from a 3V battery and generating 10V from the standard +5V logic supply (for use with analog Typical Operating Circuits circuitry). Typical applications include: Battery-Operated 6V from 3V Lithium Cell +5V Equipment Hand-Held Instruments V CC 4.7F C1+ Operational Amplifier Data-Acquisition Systems 4.7F MAX680 Power Supplies Panel Meters V+ +10V C1- 10V from +5V Logic C2+ Supply 4.7F V- -10V C2- 4.7F GND Pin Configurations GND GND TOP VIEW +5V V CC +10V V+ V+ 1 14 V CC C1- 1 8 V+ FOUR PINS REQUIRED MAX681 (MAX681 ONLY) C1- 2 13 V CC MAX680 C2+ 2 7 C1+ V- -10V MAX681 C1- 3 12 V CC GND C2- 3 6 V CC C2+ 4 11 V CC GND GND V- 4 5 GND C2- 5 10 V+ +5V to 10V CONVERTER C2- 6 9 GND DIP/SO V- 7 8 GND DIP 19-0896 Rev 2 7/19MAX680/MAX681 +5V to 10V Voltage Converters Absolute Maximum Ratings V ....................................................................................+6.2V Continuous Power Dissipation (T = +70C) CC A V+ .......................................................................................+12V 8-Pin Plastic DIP (derate 9.09mW/C above +70C)...727mW V- ........................................................................................ -12V 8-Pin Narrow SO (derate 5.88mW/C above +70C) .... 471mW V- Short-Circuit Duration ..........................................Continuous 8-Pin CERDIP (derate 8.00mW/C above +70C) ........ 640mW V+ Current .........................................................................75mA 14-Pin Plastic DIP (derate 10.00mW/C above +70C) 800mW V V/T ........................................................................1V/s Storage Temperature Range ............................-65C to +160C CC Lead Temperature (soldering, 10sec) ............................+300C 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 = +5V, test circuit Figure 1, T = +25C, unless otherwise noted.) CC A PARAMETER CONDITIONS MIN TYP MAX UNITS V = 3V, T = +25C, R = 0.5 1 CC A L V = 5V, T = +25C, R = 1 2 CC A L Supply Current V = 5V, 0C T +70C, R = 2.5 mA CC A L V = 5V, -40C T +85C, R = 3 CC A L V = 5V, -55C T +125C, R = 3 CC A L Supply-Voltage Range MIN T MAX, R = 10k 2.0 1.5 to 6.0 6.0 V A L I = 10mA, I = 0mA, V = 5V, T = +25C 150 250 L+ L- CC A I = 5mA, I = 0mA, V = 2.8V, T = +25C 180 300 L+ L- CC A Positive Charge-Pump 0C T +70C 325 A I = 10mA, Output Source Resistance L+ I = 0mA, -40C T +85C 350 L- A V = 5V CC -55C T +125C 400 A I = 10mA, I = 0mA, V+ = 10V, T = +25C 90 150 L- L+ A I = 5mA, I = 0mA, V+ = 5.6V, T = +25C 110 175 L- L+ A Negative Charge-Pump 0C T +70C 200 A I = 10mA, Output Source Resistance L- I = 0mA, -40C T +85C 200 L+ A V = 10V CC -55C T +125C 250 A Oscillator Frequency 4 8 kHz Power Efficiency R = 10k 85 % L V+, R = 95 99 Voltage-Conversion L % Efficiency V+, R = 90 97 L Maxim Integrated 2 www.maximintegrated.com