■ GENERAL DESCRIPTION

The XC9801 series are fixed regulated voltage step-up charge pump ICs which provide stable, highly efficient, positive voltages with the only external components required being 2 capacitors.

Since regulating is done via the control of the charge pumps gate voltage waveform, ripple is minimal. Output voltage is selectable in 100mV steps within a 2.5V ~ 6.0V range.

■ FEATURES

Input Voltage Range : 1.8V ~ 5.5V

Output Voltage Range : 2.5V ~ 6.0V

Small Input Current : 80μ A (no load:XC9802)

Output Current : 80mA (3.6V→ 5.0V step-up)

Oscillation Frequency : 300kHz

Stand-by Current (CE ’L’) : 2.0μ A (MAX.)

PFM Operation During Light Loads (XC9802)

CE (Chip Enable) Function

Can be used as a step-up doubler (sense = 0V)

Packages : MSOP-8A, USP-8

■ APPLICATIONS

● Palm top computers, PDAs

● On board local power supplies

● Various battery powered devices