DESCRIPTION

The SP6828/6829 devices are CMOS Charge Pump Voltage Inverters that can be implemented in designs requiring a negative voltage from a +3V battery source. The SP6828/6829 devices are ideal for both battery-powered and board level voltage conversion applications with a typical operating current of 20μA for the SP6828 and 40μA for the SP6829. Both devices can output 25mA with a voltage drop of 500mV. These devices combine a low quiescent current with high efficiency (>95 over most of its load-current range), which is ideal for designs using +3.3V or +3.6V lithium ion batteries. Applications include cell phones, PDAs,

medical instruments and other portable equipment. The SP6828/6829 devices are available in a space-saving 5-pin SOT23 Package.

■ 99.9 Voltage Conversion Efficiency

■ +1.15V to +4.2V Input Voltage Range

■ +1.15 VIN Guaranteed Start-up

■ Inverts Input Supply Voltage

■ 20μA Quiescent Current for the SP6828

■ 40μA Quiescent Current for the SP6829

■ 25mA Output Current

■ 12kHz Operating Frequency for the SP6828

■ 35kHz Operating Frequency for the SP6829

■ Ideal for +3.6V Lithium Ion Battery Applications

■ Reverse +3.6V Lithium Ion Battery Protection

■ 5-pin SOT23 Package