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PDF SP6680TR Data sheet ( Hoja de datos )
| Número de pieza | SP6680TR | |
| Descripción | High Efficiency Buck/Boost Charge Pump Regulator | |
| Fabricantes | Sipex | |
| Logotipo |  |
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® 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
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 (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
+3.6V
Lithium-Ion
Battery
4.7µF
CF1P
2
VIN 3
C/4
Cx8
CLK
CF1N
9
CF2P
10
CF2N
7
SP6680
1
456
8
GND
VOUT = +5.8V
2.2µF
SP6200
CMOS
LDO
VIN VOUT
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
1 page  
DESCRIPTION
The SP6680 device is a regulated CMOS charge
pump voltage converter that can be used to
convert a +2.7V to +6.3V input voltage to a
nominal +5.2V to +6.3V output. These devices
are ideal for cellular phone designs involving
battery-powered and/or board level voltage
conversion applications.
An external clock signal with a frequency of
32.768kHz nominal is required for device
operation. A designer can set the SP6680 device
to operate at 3 different charge pump frequencies:
8.192kHz (fINPUT / 4), 32.768kHz (fINPUT x 1), and
262.14kHz (fINPUT x 8). The three frequencies
correspond to three nominal load current ranges:
2mA, 20mA, and 60mA, respectively. The
SP6680 device optimizes for high power
efficiency with a low quiescent current of 100µA
at 8.198kHz, 200µA at 32.768kHz, and 1.0mA
at 262.14kHz. When there is no external clock
signal input, the device is in a low-power
shutdown mode drawing 4.4µA (typical) current.
The SP6680 device is ideal for designs using
+3.6V lithium ion batteries such as cell phones,
PDAs, medical instruments, and other portable
equipment. For designs involving power sources
above +2.7V up to +6.3V, the internal charge
pump switch architecture dynamically selects an
operational mode that optimizes efficiency. The
SP6680 device regulates the maximum output
voltage in steady state to +6.3V.
THEORY OF OPERATION
There are seven major circuit blocks for the
SP6680 device. Refer to Figure 1.
1) The Voltage Reference contains a band gap
and other circuits that provide the proper current
biases and voltage references used in the other
blocks.
2) The Clock Manager accepts the digital input
voltage levels (including the input clock) and
translates them to VCC and 0V. It also determines
if a clock is present in which case the device is
powered up. If the CLK input is left floating or
pulled near ground, the device shuts down and
VIN is shorted to VOUT. The worst case digital low
is 0.4V and the worst case digital high is 1.3V.
This block contains a synthesizer that generates
the internal pump clock which runs at the
frequency controlled with the C/4 and Cx8 logic
pins.
3) The Charge Pump Switch Configuration
Control determines the pump configuration
depending upon VIN as described earlier and
programs the Clock Phase Control. For an input
supply voltage from +2.7V to +3.7V, an X2
doubling architecture is enabled. This mode
requires one flying capacitor and one output
capacitor. For an input supply voltage greater
than +3.7V up to +6.3V, an X1.5 multiplier
architecture is enabled. This mode requires two
flying capacitors and one output capacitor.
VIN 3
Voltage
Reference
CLK 6
Cx8 5
C/4 4
Clock
Manager
Charge Pump Switch
Configuration Control
Clock Phase
Control
VOUT
Control
SP6680
Drivers
8
GND
2 CF1P
Charge
Pump
Switches
9 CF1N
10 CF2P
7 CF2N
1 VOUT
CF1
CF2
COUT
Figure 1. Internal Block Diagram of the SP6680
Date: 5/25/04
SP6680 High Efficiency Buck/Boost Charge Pump Regulator
5
© Copyright 2004 Sipex Corporation
5 Page 
E/2
E
D
e1
12
e
PACKAGE: 10-PIN MSOP
(ALL DIMENSIONS IN MILLIMETERS)
Ø1
E1
Seating Plane
Ø1
R1
R
L
L1
L2
Gauge Plane
Ø
Dimensions in (mm)
A
A1
A2
b
10-PIN MSOP
JEDEC MO-187
(BA) Variation
MIN TYP MAX
0 1.1
0 0.015
0.75
0.17
0.85
0.95
0.27
c
0.08
0.23
D 3.00 BSC.
E 4.90 BSC.
E1 3.00 BSC.
e 0.50 BSC.
e1 2.00 BSC.
L 0.4 0.60 0.80
L1 0.95
L2 0.25
N 10
R 0.07
R1 0.07
Ø 0º 8º
Ø1 0º 15º
1
WITH PLATING
c
(b)
b1
c1
BASE METAL
D
b
A1
A2 A
Date: 5/25/04
SP6680 High Efficiency Buck/Boost Charge Pump Regulator
11
© Copyright 2004 Sipex Corporation
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet SP6680TR.PDF ] | |
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