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 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 devices use only two small, low-cost capacitors. max861's 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 max861 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 max861are suitable for use in applications where the ICL7660 and MAX660's switching frequencies are too low. The max861 are available in 8-pin µMAXand SO packages.
max861 Data Sheet
