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SP6681 Datasheet Preview

SP6681 Datasheet

High Efficiency Boost Charge Pump Regulator

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® SP6681
High Efficiency Boost Charge Pump Regulator
FEATURES
APPLICATIONS
Ideal for Li Ion or 3V to 5V Conversion
Low Profile, Inductorless Regulator
Up To 96% Power Efficiency
+2.7V to +5.5V Input Voltage Range
5.0V, 50mA Output, 4% Accuracy
Low EMI Design
Low Quiescent Current: 175µA
Low Shutdown Current: 4µA
Optional External Clock: 32.768kHz
Thermal Shutdown Protection
Programmable Frequencies:
8.192kHz, 32.768kHz, or 262.14kHz
Internal Oscillator: 16kHz or 130kHz,
when CLK Pin Is Held High
Ultra small 10-Pin MSOP Package
GSM SIM Card Power Supplies
3V to 5V Boost Applications
Li Ion to 5.0V Boost Applications
White LED Driver
Smart Card Readers
DESCRIPTION
The SP6681 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 +5.5V is converted to a regulated output
of 5.0V. The SP6681 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 lock loop 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 SP6681 can deliver high power efficiencies up to 96% with low quiescent
currents from 175µA to 800µA. The SP6681 is offered in a 10-Pin µSOIC package.
2.2µF
2.2µF
+3.6V
Lithium-Ion
Battery
4.7µF
CF1P
2
VIN 3
C/4
Cx8
CLK
CF1N
9
CF2P
10
CF2N
7
SP6681
1 VOUT
+5.0V output
456
8
GND
2.2µF
*All Capacitors Are Ceramic
Rev:A Date: 11/20/03
SP6681 High Efficiency Boost Charge Pump Regulator
1
© Copyright 2002 Sipex Corporation




Sipex

SP6681 Datasheet Preview

SP6681 Datasheet

High Efficiency Boost Charge Pump Regulator

No Preview Available !

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 +6.0V
VOUT......................................................-0.3V to +6.0V
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
SPECIFICATIONS
VIN = +2.75 to +5.5V, fCLK = 32.768kHz, CIN = 4.7µF (ceramic), CF1 = CF2 = COUT = 2.2µF, (ESR = 0.03 ) and TAMB = -40°C to +85°C unless otherwise
noted.
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNITS
Supply Voltage, VIN
Quiescent Current, IQ
In-Rush Current into VIN,
INRUSH
Off Current, IOFF
Input Clock Freq., fCLK
fPUMP = fCLK/4
fCLK=fPUMP
fPUMP = fCLK/8
2.7V V IN 5.5V, NOTE 1
clock not present
Operational (supplied externally)
2.75 3.6
5.5
175 250
230 300
580 1500
500
8
32.768
15
V
µA
mA
µA
kHz
Pump Frequency, fPUMP
fCLK
no input
Present
Present
Present
High
High
High
C/4pin input Cx8pin input
X
Low
High
X
Low
Low
High
X
Low
Low
High
Low
High
Low
0
32.768
8.192
262.140
16
130
0
kHz
Input Threshold Voltage
VIL
VIH
Input Current
IIN(low)
IIN(high)
Mode Transition Voltage,
Hysteresis for Mode
Transition Voltage
Digital inputs = fCLK, fCLK/4, fCLK x 8
Digital inputs = fCLK, fCLK/4, fCLK x 8
X1.5 to X2, VIN falling
fpump = fCLK/4, ILOAD = 1mA
fpump, fCLK, ILOAD = 5mA
VIN rising to VIN falling
1.3
3.55
3.55
0.1
1.0
3.70
3.70
50
0.4
10
10
3.85
3.85
V
µA
V
mVpp
Transient Response:
Max. Transient Amplitude; t=5µs
ILOAD
fPUMP
100µA to 2mA 8.192kHz
1.5 %
2mA to 20mA 32.768kHz
1.5
20mA to 50mA 262.14kHz
1.5
Rev:A Date: 11/20/03
SP6681 High Efficiency Boost Charge Pump Regulator
2
© Copyright 2002 Sipex Corporation


Part Number SP6681
Description High Efficiency Boost Charge Pump Regulator
Maker Sipex
Total Page 10 Pages
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