Features: 8-Pin, 1.11mm High µMAX Package
Invert or Double the Input Supply Voltage
Three Selectable Switching Frequencies
High Frequency Reduces Capacitor Size
87% Efficiency at 50mA
200µA Quiescent Current (MAX860)
1µA Shutdown Supply Current
600mV Voltage Drop at 50mA Load
12ΩOutput ResistancApplicationPortable Computers
Medical Instruments
Interface Power Supplies
Hand-Held Instruments
Operational-Amplifier Power SuppliesPinout
SpecificationsSupply Voltage (VDD to GND or GND to OUT)........... ........+6.0V
Input Voltage Range (LV, FC,SHDN ) ......................(OUT - 0.3V)
to (VDD+ 0.3V)
Continuous Output Current (OUT, VDD)............................60mA
Output Short-Circuit to GND (Note 1).................................1sec
Continuous Power Dissipation (TA= +70°C)
SO (derate 5.88mW/°C above +70°C)..........................471mW
µMAX (derate 4.10mW/°C above +70°C)......................330mW
CERDIP (derate 8.00mW/°C above +70°C)...................640mW
Operating Temperature Ranges
MAX86_I_A.......................................................-25°C to +85°C
MAX86_ESA.......................................................-40°C to +85°C
MAX86_MJA.......................................................55°C to +125°C
Storage Temperature Range...........................-65°C to +160°C
Lead Temperature (soldering, 10sec)............................+300°C
DescriptionThe MAX860/MAX861 charge-pump voltage converters invert input voltages ranging from +1.5V to +5.5V, or double input voltages ranging from +2.5V to +5.5V. Because of their high switching frequencies, these MAX860 use only two small, low-cost capacitors. Their 50mA output makes switching regulators unnecessary, eliminating inductors and their associated cost, size, and EMI. Greater than 90% efficiency over most of the load-current range, combined with a typical operating current of only 200µA (MAX860), provides ideal perfor- mance for both battery-powered and board-level volt- age-conversion applications.
A frequency-control (FC) pin of MAX860 provides three switching- frequencies to optimize capacitor size and quiescent current and to prevent interference with sensitive cir- cuitry. Each device has a unique set of three available frequencies. A shutdown (SHDN) pin reduces current consumption to less than 1µA. The MAX860/MAX861 are suitable for use in applications where the ICL7660 and MAX660's switching frequencies are too low. The MAX860/MAX861 are available in 8-pin µMAXand SO packages.
MAX860 Data Sheet
