SP6680

® SP6680 High Efficiency Buck/Boost Charge Pump Regulator ■ 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 VOUT 1 CF1P 2 VIN 3 C/4 4 CX8 5 10 CF2P SP6680 10 Pin MSOP 9 CF1N 8 GND 7 CF2N 6 CLK Now Available in Lead Free Packaging 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 (fINPUT x 1), or 262.14kHz (fINPUT x 8). The charge pump configuration dynamically changes to optimize power efficiency. At low input voltages the charge pump doubles the input while at higher inputs the output is 1.5 times the input. The SP6680 can deliver high power efficiencies up to 96% with low quiescent currents from 75µA to 800µA. The SP6680 is offered in a 10-Pin µSOIC package. TYPICAL APPLICATION CIRCUIT 2.2µF 2.2µF CF1P 2 VIN CF1N 9 CF2P 10 7 CF2N SP6200 CMOS LDO 3 1 VOUT = +5.8V VIN SP6680 +3.6V Lithium-Ion Battery 456 4.7µF C/4 Cx8 CLK 8 GND 2.2µF VOUT +5.0V output GND 2.2µF *All Capacitors Are Ceramic Date: 5/25/04 SP6680 High Efficiency Buck/Boost Charge Pump Regulator © Copyright 2004 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. VIN.........................................................-0.3V to +7.0V VOUT......................................................-0.3V to +7.0V IOUT....................................................................100mA Storage Temperature........................-65˚C to +150˚C Power Dissipation Per Package 10-pin mSOIC (derate 8.84mW/OC above +70OC)..................720mW Junction Temperature........................................125˚C ELECTRICAL CHARA CTERISTICS VIN = +2.7 to +6.3V, fCLK = 32.768kHz, CIN = 4.7µF (ceramic), CF1 = CF2 = COUT = 2.2µF, (ESR = 0.03 Ω) and TAMB = -40°C to +85°C unless otherwise noted. PARAMETER Supply Voltage, VIN Quiescent Current, IQ MIN. 2.75 TYP. 3.6 75 170 800 500 4.4 32.768 MAX. 6.3 150 300 1500 UNITS V µA fPUMP = fCLK/4 fCLK = fPUMP fPUMP = fCLK x 8 CONDITIONS VIN = 4.2V In-Rush Current into VIN, IINRUSH Off Current, IOFF Input Clock Frequency, fCLK Pump Frequency, fPUMP (Note 2) mA 10 µA kHz 2.7V