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Date: 5/25/04

SP6680 High Efficiency Buck/Boost Charge Pump Regulator

© Copyright 2004 Sipex Corporation

High Efficiency Buck/Boost Charge Pump Regulator

SP6680

■ 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

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 correspond-

ing 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 (f

(f

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.

®

V

C/4

Cx8

CLK

GND

SP6680

8

CF1P

CF1N

CF2P

CF2N

4.7µF

2.2µF

2.2µF

2

9

10

7

1

6

45

3

+3.6V

Lithium-Ion

Battery

SP6200

CMOS

LDO

+5.0V output

V

IN

2.2µF

2.2µF

GND

V

IN

V

OUT

*All Capacitors Are Ceramic

Now Available in Lead Free Packaging

DESCRIPTION

TYPICAL APPLICATION CIRCUIT

CF1P

C/4

CX8

SP6680

10 Pin MSOP

1

2

3

4

5

10

9

8

7

6

CF2P

CF1N

GND

CF2N

CLK