The MAX1680/MAX1681 inductorless switched-capacitor voltage converters either invert an input voltage of +2.0V to +5.5V or double it while supplying up to 125mA output current. They have a selectable-frequency option that allows the use of small capacitors: 4.7F (MAX1680), 1F (MAX1681). With their high output current capability, these charge-pump devices are suitable replacements for inductor-based regulators, which require more expensive external components and additional board space.
The devices' equivalent output resistance (typically 3.5) allows them to deliver as much as 125mA with only a 440mV drop. A shutdown feature reduces quiescent current to less than 1A. The MAX1680/MAX1681 are available in 8-pin SO packages. For devices that deliver up to 50mA in smaller MAX packages, refer to the MAX860/MAX861 data sheet.
IN ...........................................................................-0.3V to +6V
LV....................................................(VOUT - 0.3V) to (VIN + 0.3V)
CAP+ ...........................................................-0.3V to (VIN + 0.3V)
SHDN, FSEL .......................................(VLV - 0.3V) to (VIN + 0.3V)
OUT, CAP- .................................................................-6V to 0.3V
Continuous Output Current .............................................135mA
Output Short-Circuit Duration to GND (Note 1) ...................1sec
Continuous Power Dissipation (TA = +70°C)
SO (derate 5.88mW/°C above +70°C)............................471mW
Operating Temperature Range ..........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
Note 1: Shorting OUT to IN may damage the device and should be avoided.
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.
Required Field 
