19-1247; Rev 0; 7/97
125mA, Frequency-Selectable, Switched-Capacitor
Voltage Converters
_______________General Description
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.
7µF (MAX1680), 1µF (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.
5Ω) allows them to deliver a...