SP6680 Datasheet, PDF (1/12 Pages) Sipex Corporation – High Efficiency Buck/Boost Charge Pump Regulator

®
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
V_OUT 1
CF1P 2
V_IN 3
C/4 4
CX8 5
SP6680
10 Pin MSOP
10 CF2P
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 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_INPUT / 4), 32.768kHz (f_INPUT x 1), or 262.14kHz
(f_INPUT 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
+3.6V
Lithium-Ion
Battery
4.7µF
CF1P
2
V_{IN 3}
C/4
Cx8
CLK
CF1N
9
CF2P
10
CF2N
7
1
SP6680
456
8
GND
V_OUT = +5.8V
2.2µF
SP6200
CMOS
LDO
V_IN
V_OUT
GND
2.2µF
+5.0V output
Date: 5/25/04
SP6680 High Efficiency Buck/Boost Charge Pump Regulator
1
*All Capacitors Are Ceramic
© Copyright 2004 Sipex Corporation