MAX860IUA+

The MAX860IUA+ is a 50mA, frequency-selectable, switched-capacitor voltage converter in 8 pin µMAX package. This is a capacitive charge pump either invert or double the voltage applied to their inputs. i.e. invert the input voltages ranging from voltages ranging from +1.5V to +5.5V or double input voltage ranging from +2.5V to +5.5V. Because of its high switching frequency, this device uses only two small low-cost capacitors. The 50mA output makes switching regulator unnecessary and eliminates inductor and their associated cost, size and EMI. A frequency-control (FC) pin provides three switching frequencies to optimize capacitor size and quiescent current and to prevent interference with sensitive circuitry. It is used in operational-amplifier power supplies and interface power supplies.

• Voltage conversion efficiency is 99.9% at no load
• Power efficiency at 50mA is 87%
• Shutdown supply current is 1µA
• Voltage drop is 600mV at 50mA load
• Output resistance is 12ohm at IL = 50mA
• Switching frequency is 6KHz at FC = VDD
• Time to exit shutdown is 500µs at no load, VOUT = -4V
• Output current is 100mA at VDD = 5V, VOUT more negative than -3.75V
• Quiescent current is 200µA

Applications

Power Management, Portable Devices, Medical

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party