DESCRIPTION
The SP6680 is a charge pump ideal for converting a +3.6V Li-Ion battery input to a +5.0V regulated output. An input voltage range of +2.7V to +6.3V is converted to a regulated output of 5.8V. The SP6680 device will operate at three different switching frequencies corresponding to three different output resistances and load current ranges. An external 32.768kHz nominal clock signal is used to produce three synchronized pump frequencies through the use an internal phase look loop of an to drive the charge pump. Two control inputs can adjust the internal pump frequency on the fly to 8.192kHz (fINPUT/ 4), 32.768kHz (fINPUTx 1), or 262.14kHz (fINPUTx 8). The charge pump configuration dynamically changes to optimize power efficiency.

■ Ideal For Sim Card Applications In Cellular Phones
■ Low Profile, Inductorless Regulator
■ Up To 96% Power Efficiency
■ +2.7V to +6.3V Input Voltage Range
■ 5.8V Output Voltage
■ 60mA Output Current
■ 75µA Quiescent Current
■ 4µA Shutdown Current
■ External 32.768kHz Clock Input
■ Three Programmable Charge Pump Frequencies: 8.192kHz, 32.768kHz, and 262.14kHz
■ Internal Oscillator At 16.7kHz, When CLK Pin Is Held High
■ Space Saving 10-Pin µSOIC Package