SP6660EP-L/TR [SIPEX]
Analog Circuit,;
| 型号： | SP6660EP-L/TR |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | Analog Circuit, 光电二极管 |
| 文件： | 总22页 (文件大小：265K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SP6660
200mA Charge Pump Inverter or Doubler
■ Inverts or Doubles Input Supply Voltage
■ 93% Power Efficiency at 3.6V
■ 10kHz/80kHz Selectable Oscillator
■ External Oscillator up to 700KHz
■ 5Ω Output Resistance at 3.6V
■ Low Voltage Battery Operation
■ Ideal for 3.6V Lithium Ion Battery
■ High Output Current – 200mA
■ Pin-Compatible High-Current Upgrade of
the ICL7660 and 660 Industry Standard
■ Smallest Package Available for the 660
Industry Standard – 8pin µSOIC
Now available in Lead Free
DESCRIPTION
The SP6660 is a CMOS DC-DC Monolithic Voltage Converter that can be implemented as a
Voltage Inverter or a Positive Voltage Doubler. As a Voltage Inverter, a -1.5V to -4.25V output
canbeconvertedfroma+1.5Vto+4.25Vinput. AsaVoltageDoubler,theSP6660canprovide
a +8.0V output at 100mA from a +4.25V input. The SP6660 is ideal for both battery-powered
and board level voltage conversion applications with a typical operating current of 400µA and
a high efficiency (>90%) over most of its load-current range. Typical end products for this
deviceareoperationalamplifierandinterfacepowersupplies,medicalinstruments,andhand-
held and laptop computers. The SP6660 is available in 8-pin DIP, SOIC, and µSOIC
packages.
+VIN
+1.5V to +4.25V
TYPICAL CIRCUIT: VOLTAGE INVERTER
TYPICAL CIRCUIT: VOLTAGE DOUBLER
+V
+VIN
FC
1
8
7
6
+1.5V to +4.25V
DOUBLE
VOLTAGE
OUTPUT
+V
FC
1
8
7
CAP+
GND
SP6660
OSC
2
3
CAP+
GND
LV
SP6660
OSC
2
3
C2
1µF to 150µF
C1
LV
1µF to 150µF
6
5
C1
1µF to 150µF
OUT
CAP-
NEGATIVE
VOLTAGE
OUTPUT
5
4
OUT
CAP-
4
C2
1µF to 150µF
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the
deviceattheseratingsoranyotherabovethoseindicatedinthe
operation sections of the specifications below is not implied.
Exposure to absolute maximum rating conditions for extended
periods of time may affect reliability.
OUT and V+ Continuous Output Current.....................250mA
Output Short-Circuit Duration to GND.................................1s
Operating Temperature Ranges
SP6660C_........................................0˚C to +70˚C
SP6660E_.....................................-40˚C to +85˚C
Continuous Power Dissipation (TAMB = 70˚C)
Power Supply Voltage
PDIP (derate 9.09mW/˚C above +70˚C)..................727mW
NSOIC (derate 5.88mW/˚C above +70˚C)...............471mW
µSOIC (derate 4.10mW/˚C above +70˚C)................330mW
Operating Temperature...................................-40˚C to +85˚C
Storage Temperature....................................-65˚C to +150˚C
(V+ to GND or GND to OUT).........................................+4.5V
LV Input Voltages........................(OUT - 0.3V) to (V+ + 0.3V)
FC and OSC Input Voltages..................The least negative of
(OUT - 0.3V) or (V+ - 4.5V) to (V+ + 0.3V)
Lead Temperature (soldering 10s)..............................+300˚C
SPECIFICATIONS
PARAMETER
Inverter Circuit at Low Frequency with 150µF Capacitors
V+ = 3.6V, C1 = C2 = 150µF, FC = open, TAMB = TMIN to TMAX; refer to Figure 1 test circuit. Note 2
MIN.
TYP.
MAX.
UNITS
CONDITIONS
Supply Voltage
1.5
200
5
0.93
0.4
4.25
0.8
V
mA
mA
µA
kHz
Ω
RL = 500Ω, Note 4
Supply Current
No Load
Output Current
Oscillator Input Current
Oscillator Frequency
Output Resistance
Voltage Conversion Efficiency
Power Efficiency
±1
10
20
10
5.2
IL = 100mA, Note 3
No Load
99.00
99.96
%
88
80
63
94
85
70
RL = 500Ω
IL = 100mA
IL = 200mA
%
Doubler Circuit at Low Frequency with 150µF Capacitors
V+ = 3.6V, C1 = C2 = 150µF, FC = open, TAMB = TMIN to TMAX; refer to Figure 2 test circuit. Note 2
Supply Voltage
2.5
200
5
1.5
0.4
4.25
0.8
V
RL = 1kΩ, Note 4
Supply Current
mA
mA
µA
kHz
Ω
No Load
Output Current
Oscillator Input Current
Oscillator Frequency
Output Resistance
Voltage Conversion Efficiency
Power Efficiency
±1
10
20
10
5.2
IL = 100mA, Note 3
No Load
99.00
99.96
%
91
89
79
96
93
85
RL = 1KΩ
IL = 100mA
IL = 200mA
%
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
2
SPECIFICATIONS (continued)
PARAMETER
Inverter Circuit at High Frequency with 22µF Capacitors
V+ = 3.6V, C1 = C2 = 22µF, FC = V+, TAMB = TMIN to TMAX; refer to Figure 1 test circuit. Note 2
MIN.
TYP.
MAX.
UNITS
CONDITIONS
Supply Voltage
1.5
200
40
0.97
0.6
4.25
1.5
V
mA
mA
µA
kHz
Ω
RL = 500Ω, Note 4
Supply Current
No Load
Output Current
Oscillator Input Current
Oscillator Frequency
Output Resistance
Voltage Conversion Efficiency
Power Efficiency
±8
80
160
10
5.0
IL = 100mA, Note 3
No Load
99.00
99.96
%
86
80
63
92
86
71
RL = 500Ω
IL = 100mA
IL = 200mA
%
Doubler Circuit at HIgh Frequency with 22µF Capacitors
V+ = 3.6V, C1 = C2 = 22µF, FC = V+, TAMB = TMIN to TMAX; refer to Figure 2 test circuit. Note 2
Supply Voltage
2.5
200
40
1.6
0.6
4.25
1.5
V
mA
mA
µA
kHz
Ω
RL = 1kΩ, Note 4
Supply Current
No Load
Output Current
Oscillator Input Current
Oscillator Frequency
Output Resistance
Voltage Conversion Efficiency
Power Efficiency
±8
80
160
10
5.0
IL = 100mA, Note 3
No Load
99.00
99.96
%
90
89
79
94
93
85
RL = 1KΩ
IL = 100mA
IL = 200mA
%
NOTE 1: Specified output resistance is a combination of internal switch resistance and capacitor ESR.
NOTE 2: In the test circuit capacitors C1 and C2 are 150µF, 0.2 maximum ESR, tantalum or 22µF, 0.2
maximum ESR, tantalum. Capacitors with higher ESR may reduce output voltage and efficiency.
Refer to Capacitor Selection section.
NOTE 3: Specified output resistance is a combination of internal switch resistance and capacitor ESR.
Refer to Capacitor Selection section.
NOTE 4: Typical value indicates start-up voltage.
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
3
PINOUT
1
2
3
4
8
V+
FC
CAP+
GND
7
6
5
OSC
LV
SP6660
OUT
CAP-
PIN ASSIGNMENTS
Pin 1— FC — Frequency Control for the
internal oscillator. FC = open,fOS C = 10KHz
typical; FC = V+, fOSC = 80KHz typical
Pin 5 — OUT — (Voltage Inverter Circuit)
Negative voltage output pin.
Pin 5 — OUT — (Positive Voltage Doubler
Circuit) Ground pin for power supply.
Pin 2 — CAP+ — Connect to the positive
terminal of the charge pump capacitor.
Pin 6 — LV
Low-voltage operation input pin in 660
circuits.InSP6660circuitscanbeconnected
to GND, OUT or left open as desired with no
effect.
Pin 3 — GND — (Voltage Inverter Circuit)
Ground.
Pin 3 — GND — (Positive Voltage Doubler
Circuit) Positive supply voltage input.
Pin 7 — OSC — Control pin for the oscillator.
Internally connected to 15pf capacitor.
An external capacitor can be added to slow
the oscillator. Be careful to minimize stray
capitance. An external oscillator can be
connected to overdrive the OSC pin.
Pin 4 — CAP- — Connect to the negative
terminal of the charge pump capacitor.
Pin 8 — V+ — (Voltage Inverter Circuit)
Positive voltage input pin for the power
supply.
Pin 8 — V+ — (Positive Voltage Doubler
Circuit) Positive voltage output.
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
4
DESCRIPTION
Typical performance curves in Figures 3 to 20
are generated using the test circuits found in
Figure 1 and Figure 2. Four operating modes
are shown in the curves: Voltage inverter in low
and high frequency modes and voltage doubler
in low and high frequency modes.
The SP6660 Charge Pump DC-DC Voltage
Converter either inverts or doubles the input
voltage. Asanegativevoltageinverter,asshown
in Figure 1, a +1.5V to +4.25V input can be
converted to a -1.5V to -4.25V output. Figure 2,
as a positive voltage doubler, a +2.5V to +4.25V
inputcanbeconvertedtoa+5.0Vto+8.5Voutput.
TEST CIRCUIT: VOLTAGE INVERTER
IS
FC
1
V+
+VIN
8
7
6
CAP+
OSC
LV
SP6660
2
C1
GND
3
OUT
CAP-
5
4
VOUT
IL
RL
C2
Figure 1. SP6660 Test Circuit for the Voltage Inverter
+VIN
TEST CIRCUIT: VOLTAGE DOUBLER
IS
FC
+V
1
VOUT
8
7
CAP+
GND
SP6660
OSC
2
3
RL
C2
LV
6
5
C1
OUT
CAP-
4
Figure 2. Test Circuit for the Positive Voltage Doubler
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
5
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = +3.6V, TAMB = 25oC unless otherwise noted. LF = Low Frequency, FC = Open, C1 = C2 = 150µF.
HF = High Frequency, FC = V+, C1 = C2 = 22µF. Inverter Circuit use Figure 1. Doubler Circuit use Figure 2.
0.6
0.5
0.4
0.3
0.2
0.1
0
3A: Doubler
HF
LF
1.5
2
2.5
3
3.5
4
4.5
Supply Voltage (V)
3B: Inverter
0.8
0.6
0.4
0.2
0
HF
LF
1
1.5
2
2.5
3
3.5
4
4.5
Supply Voltage (V)
Figure 3A and 3B Supply Current vs. Supply Voltage
4
3
2
1
0
Inverter
Doubler
1
10
Oscillator Frequency (kHz)
Figure 4. Supply Current vs. Oscillator Frequency
100
1000
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
6
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = +3.6V, TAMB = 25oC unless otherwise noted. LF = Low Frequency, FC = Open, C1 = C2 = 150µF.
HF = High Frequency, FC = V+, C1 = C2 = 22µF. Inverter Circuit use Figure 1. Doubler Circuit use Figure 2.
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
V+ = 3.6V
V+ = 2.5V
V+ = 1.5V
0
50
100
150
200
250
Load Current (mA)
Figure 5. Output Voltage Drop vs. Load Current – Inverter LF
100
95
90
85
80
75
70
65
60
V+ = 3.6V
V+ = 2.5V
V+ = 1.5V
0
50
100
150
200
250
Load Current (mA)
Figure 6. Power Efficiency vs. Load Current – Inverter LF
-4
-3
-2
-1
Inverter IL = 10mA
0
1
2
3
4
5
6
7
8
Inverter IL = 100mA
Inverter IL = 200mA
Doubler IL = 10mA
Doubler IL = 100mA
1
10
Oscillator Frequency (kHz)
Figure 7. Output Voltage vs. Oscillator Frequency
100
1000
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
7
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = +3.6V, TAMB = 25oC unless otherwise noted. LF = Low Frequency, FC = Open, C1 = C2 = 150µF.
HF = High Frequency, FC = V+, C1 = C2 = 22µF. Inverter Circuit use Figure 1. Doubler Circuit use Figure 2.
100
90
Inverter IL = 10mA
Inverter IL = 100mA
Inverter IL = 200mA
80
Doubler IL = 10mA
Doubler IL = 100mA
70
60
1
10
100
1000
Oscillator Frequency (kHz)
Figure 8. Power Efficiency vs. Oscillator Frequency
60
50
40
30
20
10
0
1
1.5
2
2.5
3
3.5
4
4.5
Supply Voltage (V)
Figure 9. Oscillator Frequency vs. Supply Voltage – HF
8
6
4
2
0
1
1.5
2
2.5
3
3.5
4
4.5
Supply Voltage (V)
Figure 10. Oscillator Frequency vs. Supply Voltage – LF
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
8
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = +3.6V, TAMB = 25oC unless otherwise noted. LF = Low Frequency, FC = Open, C1 = C2 = 150µF.
HF = High Frequency, FC = V+, C1 = C2 = 22µF. Inverter Circuit use Figure 1. Doubler Circuit use Figure 2.
100
LF
10
1
HF
0.1
0.01
1
10
100
1000
10000
Capacitance (pF)
Figure 11. Oscillator Frequency vs. External Capacitance
60
40
20
0
-50
-25
0
25
50
75
100
Temperature (C)
Figure 12. Oscillator Frequency vs. Temperature where FC=V+
7
6
5
4
3
2
1
0
-50
-25
0
25
50
75
100
Temperature (C)
Figure 13. Oscillator Frequency vs. Temperature where FC=open
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
9
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = +3.6V, TAMB = 25oC unless otherwise noted. LF = Low Frequency, FC = Open, C1 = C2 = 150µF.
HF = High Frequency, FC = V+, C1 = C2 = 22µF. Inverter Circuit use Figure 1. Doubler Circuit use Figure 2.
16.0
LF
HF
12.0
8.0
4.0
0.0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
Supply Voltage (V)
Figure 14. Output Source Resistance vs. Supply Voltage
7
6
5
4
3
2
1
0
-50
-25
0
25
50
75
100
Temperature (C)
Figure 15. Output Source Resistance vs. Temperature Inverter LF
7
6
5
4
3
2
1
0
-50
-25
0
25
50
75
100
Temperature (C)
Figure 16. Output Source Resistance vs. Temperature where Inverter HF
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
10
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = +3.6V, TAMB = 25oC unless otherwise noted. LF = Low Frequency, FC = Open, C1 = C2 = 150µF.
HF = High Frequency, FC = V+, C1 = C2 = 22µF. Inverter Circuit use Figure 1. Doubler Circuit use Figure 2.
VIN = 3.6V
VOUT = 6.66V
IL = 100mA
VIN = 3.6V
VOUT = -3.06V
IL = 100mA
Figure 18. Output Noise and Ripple - Inverter LF
Figure 17. Output Noise and Ripple - Doubler LF
VIN = 3.6V
VIN = 3.6V
VOUT = 6.66V
IL = 100mA
VOUT = -3.06V
IL = 100mA
Figure 19. Output Noise and Ripple - Doubler HF
Figure 20. Output Noise and Ripple - Inverter HF
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
11
THEORY OF OPERATION
Negative Voltage Inverter
The SP6660 is insensitive to load current
changes. Output Source Resistance vs. Supply
Voltage and Temperature curves are shown in
Figures 14 to 16. A typical output source
resistance of 5.2Ω allows an output voltage of
-4.25Vunderlightloadwithaninputof+4.25V.
This output voltage decreases to only -4.0V
with a load current draw of 100mA.
This is the most common application of the
SP6660 where a +1.5V to +4.25V input is
converted to a -1.5V to -4.25V output. In the
invertingmode,theSP6660istypicallyoperated
with LV connected to GND. Since the LV may
be left open, the substitution of the SP6660 for
the ICL7660 industry standard is simplified.
The circuit for the voltage inverter mode can be
found in Figure 21. This operating circuit uses
only two external capacitors, C1 and C2, for
the internal charge pump. This allows designers
to avoid any EMI concerns with the costly,
space-consuming inductors typically used with
switching regulators.
The peak-to-peak output ripple voltage is
calculated as follows:
IOUT
2(fPUMP)(C2)
VRIPPLE
=
+ IOUT(ESRC2)
TYPICAL CIRCUIT: VOLTAGE INVERTER
+V
+VIN
1
FC
8
7
6
+1.5V to +4.25V
CAP+
GND
SP6660
OSC
2
3
LV
C1
1µF to 150µF
OUT
CAP-
NEGATIVE
VOLTAGE
OUTPUT
5
4
C2
1µF to 150µF
Figure 21. Typical Operating Circuit for the Voltage Inverter
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
12
Positive Voltage Doubler
ForanominalfPUMP of5kHz(wherefOSC=10kHz)
and C2=150µF with an ESR of 0.2Ω, the ripple
is approximately 90mV with a 100mA load
current. IfC2israisedto390µF, therippledrops
to45mV. The output ripple voltage iscalculated
by noting that capacitor C2 supplies the output
current during one-half of the charge pump cycle.
The SP6660 can double the output voltage of an
input power supply or battery. From a +4.25V
input,thecircuitinFigure22canprovide100mA
with +8.0V at V+. The no-load voltage output at
V+ is 2(VINL).
LV may be tied to OUT pin for all input voltages
in the positive voltage doubler mode. Connect
thepower-supplypositivevoltageinputtoGND
pin. Connect the power-supply ground input to
OUT pin. V+ is the positive voltage output in
this mode.
OSCisinternallyconnectedtoa15pFcapacitor.
An external capacitor can be added to slow the
oscillator. Designers should take care to
minimize stray capacitance. An external
oscillator may also be connected to overdrive
OSC. Refer to the Oscillator Control section
for further details.
Designers may overdrive OSC in the positive
voltage doubler mode. Refer to the Oscillator
Control section for further details.
+VIN
+1.5V to +4.25V
TYPICAL CIRCUIT: VOLTAGE DOUBLER
DOUBLE
VOLTAGE
OUTPUT
+V
1
FC
8
7
CAP+
GND
SP6660
OSC
2
3
C2
1µF to 150µF
LV
6
5
C1
1µF to 150µF
OUT
CAP-
4
Figure 22. Typical Operating Circuit for the Positive Voltage Doubler
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
13
Optimizing Loss Conditions
LossesinSP6660applicationscanbeanticipated
from the following:
Oscillator
Frequency
FC
OSC
open
V+
open
open
10kHz typical
80kHz typical
1. Output Resistance:
VLOSSΩ = ILOAD x ROUT
external
capacitor
open or V+
open
refer to Figure 11
where VLOSSΩ is the voltage drop due to the
external
clock
external clock
frequency
SP6660 output resistance, I
is the load
current,andROUT istheSP6660LoOuAtDputresistance.
Figure 23. Four control modes for the SP6660
Oscillator Frequency
2. Charge Pump Capacitor ESR:
V
LOSSC1 ≈ 4 x ESRC1 x ILOAD
Oscillator Control
Refer to Figure 23 for a table of the four control
modes of the SP6660 internal oscillator
frequencies. In the first mode, FC and OSC are
open (unconnected) and the internal oscillator
typically runs at 10kHz. OSC is internally
connected to a 15pF capacitor.
where VLOSSC1 is the voltage drop due to the
charge pump capacitor, C1, ESR is the ESR of
C1, and ILOAD is the load current.CT1 he loss in C1
is larger than the loss in the reservoir capacitor,
C2, because it handles a current almost four
times larger than the load current during charge-
pump operation. As a result of this, a change in
the capacitor ESR has a much greater impact on
theperformanceoftheSP6660forC1thanforC2.
In the second mode, FC is connected to V+. The
charge and discharge current at OSC changes
from 1.0µA to 8.0µA, increasing the oscillator
frequency eight times to 80kHz.
3. Reservoir Capacitor ESR:
In the third mode, the oscillator frequency is
loweredbyconnectingacapacitorbetweenOSC
and GND. FC can still multiply the frequency
byeighttimesinthismode, butforalowerrange
offrequencies.RefertoFigure11fortheseranges.
VLOSSC2 = ESRC2 x ILOAD
where V
is the voltage drop due to the
reservoirLcOaSpSCa2citor C2, ESRC2 is the ESR of C2,
and I
is the load current. Increasing the
capacLiOtaAnDce of C2 and/or reducing its ESR
can reduce the output ripple that may be
caused by the charge pump. A designer can
filter high-frequency noise at the output
by implementing a low ESR capacitor at C2.
Generally, capacitors with larger capacitance
values and higher voltage ratings tend to
reduce ESR.
In the fourth mode, any standard CMOS logic
output can be used to drive OSC. OSC may be
overdriven by an external oscillator that swings
betweenV andGND.WhenOSCisoverdriven,
FC has noINeffect.
Unlike the 7660 and 660 industry standards,
designers may overdrive the oscillator of the
SP6660 in both the inverting and the Voltage
Doubling Mode.
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
14
Optimizing Capacitor Selection
Designing a Multiple of the SP6660
Negative Inverted Output Voltage
Referto Figure24 forthetotaloutputresistance
for various capacitance values and oscillator
frequencies. The reservoir and charge pump
capacitor values are equal. The capacitance
values required to maintain comparable ripple
and output resistance typically diminish
proportionately as the pump frequency of the
SP6660 increases.
The SP6660 can be cascaded to allow a designer
to provide a multiple of the negative inverted
output voltage of a single SP6660 device. The
approximate total output resistance, RTOT,of the
cascaded SP6660 devices is equal to the sum of
the individual SP6660 output resistance values,
R
. The output voltage, VTOT, is a multiple of
thOeUnTumber of cascaded SP6660 devices and the
output voltage of an individual SP6660 device,
VOUT. RefertoFigure25forthecircuitcascading
SP6660devices.Notethatthecapacitancevalue
of C1 for the charge pump and C2 at VOUT is
multipliedrespectivelytothenumberofcascaded
SP6660 devices.
The test conditions for the curves of Figure 24
arethesameasforFigures2to20forthecircuits
in Figures 1 and 2; additional conditions are as
follows:
C1 = C2 = 0.2Ω ESR capacitors
R
OUT = 4.2Ω
The flat portion of the curves shown at a 5.2Ω
effective output resistance is a result of the
SP6660's 5.25Ω output resistance where
Connecting the SP6660 in Parallel
SP6660 devices can be connected in parallel
to reduce the total output resistance. The
approximate total output resistance, R , of the
multiple devices connected in paralleTlOiTs equal
to the output resistance of an individual SP6660
device divided by the total number of devices
connected. Refer to Figure 26 for the circuit
connecting multiple SP6660devices in parallel.
Note that only the charge pump capacitor value
of C1 is multiplied respectively by the number
of SP6660 connected in parallel. A single
capacitor C2 at the output voltage VOUT of the
"nth" device connected in parallel serves all
devices connected.
5.2Ω = ROUT(SP6660) + (4 x ESRC1) + ESRC2.
Instead of the typical 5.2Ω, ROUT = 4.2Ω is used
because the typical specification includes the
effect of the ESRs of the capacitors used in the
test circuit in Figures 1 and 2.
Refer to Figures 17, 18, 19 and 20 for the output
currents using 0.33µF to 220µF capacitors.
Output currents are plotted for 3.0V and 4.5V
inputs taking into consideration a 10% to 20%
loss in the input voltage. The SP6660 5.2Ω
seriesresistancelimitsincreasesinoutputcurrent
vs. capacitance for values much higher than
47µF.Largervaluesmaystillbeusefultoreduce
ripple.
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
15
+VIN
+VIN
+VIN
1
FC
1
FC
1
FC
8
7
6
8
7
6
8
7
6
CAP+
GND
CAP+
GND
CAP+
GND
SP6660
OSC
OSC
2
3
SP6660
OSC
2
3
SP6660
2
3
LV
LV
LV
C1 x n
C1 x 2
C1
“1”
“2”
“n”
OUT
OUT
OUT
CAP-
CAP-
CAP-
5
5
5
4
4
4
VOUT
C2 _ 2
C2 _ n
C2
VOUT = -n x VIN
where VOUT = output voltage,
VIN = input voltage, and
n = the total number of SP6660 devices connected.
Figure 25. SP6660 Devices Cascaded to Provide a Multiple of a Negative Inverted Output Voltage
+VIN
+VIN
+VIN
1
FC
1
FC
1
FC
8
7
6
8
7
6
8
7
6
RTOT
CAP+
GND
CAP+
GND
CAP+
GND
OSC
LV
OSC
2
3
SP6660
OSC
2
3
SP6660
SP6660
2
3
LV
LV
C1 _ n
C1
C1 _ 2
“1”
“2”
“n”
OUT
OUT
OUT
CAP-
CAP-
CAP-
5
5
5
4
4
4
ROUT
RTOT
=
n
where RTOT = total resistance of the SP6660 devices connected in parallel,
ROUT = the output resistance of a single SP6660 device, and
n = the total number of SP6660 devices connected in parallel.
C2
Figure 26. SP6660 Devices Connected in Parallel to Reduce Output Resistance
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
16
C3
+VIN
D1
D2
V+
LV
1
FC
CAP+
VOUT1
8
7
6
SP6660
OSC
2
3
C4
GND
C1
OUT
CAP-
5
4
VOUT2
C2
VOUT1 = (2 x VIN) - VFD1 - VFD2
VOUT2 = -VIN
where VOUT1 = positive doubled output voltage,
VIN = input voltage,
VFD1 = forward bias voltage across D1,
VFD2 = forward bias voltage across D2, and
VOUT2 = inverted output voltage.
Figure 27. The SP6660 Connected for Negative Voltage Conversion with Positive Supply Multiplication
Circuit for Negative Voltage Conversion
with Positive Supply Multiplication
generate the inverted output voltage at VOUT2
CapacitorC3isforthechargepumpandcapacitor
.
A designer can use the circuit in Figure 27 to
provide both an inverted output voltage at V
and a positive multiple of V at VOUT1
(subtracting the forward biased voIlNtages ofODUT12
and D2). Capacitor C1 is for the charge pump
and capacitor C2 is for the reservoir function to
C4 is for the reservoir function to generate the
multiplied positive output voltage at VOUT1
.
Designers should pay special attention to the
possibility of higher source impedances at the
generated supplies due to the finite impedance
of the common charge pump driver.
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
17
DOUBLER
+5
VOUT
D1
VIN
C4
4.7µF
Cer.
+
5
C3
1V
2GND
LP2985
VOUT
C2
IN
150µF
Tant.
150µF
1
2
3
4
SP6660
8
7
6
5
FC
GND
V+
OSC
LV
GND
GND
CAP+
+ Tant.
BYPASS 4
3ON/OFF_N
CAP+
GND
CAP-
+
C5
10nF
Cer.
C1
OUT
150µF
FC
Tant.
Figure 28. The SP6660 and a LDO Regulator Connected as a 3V Input to Regulated 5V Output Converter.
APPLICATIONS
The SP6660 Evaluation Board provides a 3V to
5V 160mA DC to DC Converter using the
SP6660 Doubler Circuit and a 5V LDO
Regulator.
100
SP6660 Ripple
90
IL = 150mA
V
= 3.2V
80
70
60
VIN 6660 = 5.53V
V
OUT LDO = 4.95V
ILOOAUDT = 150mA
5VLDO Ripple
2.8
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Input Voltage (V)
Figure 30. Power Efficiency vs Input Voltage - SP6660
Doubler with 5V LDO
Figure 29. Ripple and Noise output of the SP6660 and a
LDO Regulator with ILOAD = 150mA
200
100
Vin = 3.0V
Vin = 3.3V
Vin = 3.6V
150
100
50
6660 Ripple
IL = 150mA
90
LDO Ripple
IL = 150mA
80
70
60
0
1
10
100
1000
2.8 3.0
3.2 3.4
3.6 3.8
4.0 4.2
Load Current (mA)
Input Voltage (V)
Figure 32. Ripple Voltage vs Input Voltage -
SP6660 Doubler with 5V LDO
Figure 31. Power Efficiency vs Load Current - SP6660
Doubler with 5V LDO
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
18
PACKAGE: PLASTIC
DUAL–IN–LINE
(NARROW)
E1
E
D1 = 0.005" min.
(0.127 min.)
A1 = 0.015" min.
(0.381min.)
D
A = 0.210" max.
(5.334 max).
C
A2
Ø
L
B1
B
e
= 0.300 BSC
(7.620 BSC)
e = 0.100 BSC
(2.540 BSC)
A
ALTERNATE
END PINS
(BOTH ENDS)
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
8–PIN
14–PIN
16–PIN
18–PIN
20–PIN
22–PIN
0.115/0.195
0.115/0.195
0.115/0.195
0.115/0.195
(2.921/4.953)
0.115/0.195
(2.921/4.953)
0.115/0.195
(2.921/4.953)
A2
(2.921/4.953) (2.921/4.953) (2.921/4.953)
0.014/0.022
0.014/0.022
0.014/0.022
0.014/0.022
(0.356/0.559)
0.014/0.022
(0.356/0.559)
0.014/0.022
(0.356/0.559)
B
(0.356/0.559) (0.356/0.559) (0.356/0.559)
0.045/0.070 0.045/0.070 0.045/0.070
0.045/0.070
0.045/0.070
0.045/0.070
B1
C
(1.143/1.778) (1.143/1.778) (1.143/1.778)
(1.143/1.778)
(1.143/1.778)
(1.143/1.778)
0.008/0.014 0.008/0.014 0.008/0.014
0.008/0.014
(0.203/0.356)
0.008/0.014
(0.203/0.356)
0.008/0.014
(0.203/0.356)
(0.203/0.356) (0.203/0.356) (0.203/0.356)
0.355/0.400 0.735/0.775 0.780/0.800
0.880/0.920
0.980/1.060
1.145/1.155
D
(9.017/10.160) (18.669/19.685) (19.812/20.320) (22.352/23.368) (24.892/26.924) (29.083/29.337)
0.300/0.325
0.300/0.325
0.300/0.325
0.300/0.325
(7.620/8.255)
0.300/0.325
(7.620/8.255)
0.300/0.325
(7.620/8.255)
E
(7.620/8.255) (7.620/8.255) (7.620/8.255)
0.240/0.280 0.240/0.280 0.240/0.280
0.240/0.280
0.240/0.280
0.240/0.280
E1
L
(6.096/7.112) (6.096/7.112) (6.096/7.112)
(6.096/7.112)
(6.096/7.112)
(6.096/7.112)
0.115/0.150 0.115/0.150 0.115/0.150
(2.921/3.810) (2.921/3.810) (2.921/3.810)
0.115/0.150
(2.921/3.810)
0.115/0.150
(2.921/3.810)
0.115/0.150
(2.921/3.810)
0°/ 15°
(0°/15°)
0°/ 15°
(0°/15°)
0°/ 15°
(0°/15°)
0°/ 15°
(0°/15°)
0°/ 15°
(0°/15°)
0°/ 15°
(0°/15°)
Ø
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
19
PACKAGE: PLASTIC
SMALL OUTLINE (SOIC)
(NARROW)
E
H
h x 45°
D
A
Ø
A1
L
e
B
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
8–PIN
14–PIN
0.053/0.069
16–PIN
A
A1
B
D
E
0.053/0.069
(1.346/1.748) (1.346/1.748) (1.346/1.748)
0.053/0.069
0.004/0.010
(0.102/0.249
0.004/0.010
(0.102/0.249) (0.102/0.249)
0.004/0.010
0.014/0.019
(0.35/0.49)
0.013/0.020
(0.330/0.508) (0.330/0.508)
0.013/0.020
0.189/0.197
(4.80/5.00)
0.337/0.344 0.386/0.394
(8.552/8.748) (9.802/10.000)
0.150/0.157 0.150/0.157
0.150/0.157
(3.802/3.988) (3.802/3.988) (3.802/3.988)
e
0.050 BSC
(1.270 BSC)
0.050 BSC
(1.270 BSC)
0.050 BSC
(1.270 BSC)
H
h
0.228/0.244
0.228/0.244
0.228/0.244
(5.801/6.198) (5.801/6.198) (5.801/6.198)
0.010/0.020
(0.254/0.498) (0.254/0.498) (0.254/0.498)
0.010/0.020
0.010/0.020
L
0.016/0.050 0.016/0.050 0.016/0.050
(0.406/1.270) (0.406/1.270) (0.406/1.270)
Ø
0°/8°
(0°/8°)
0°/8°
(0°/8°)
0°/8°
(0°/8°)
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
20
PACKAGE: PLASTIC
MICRO SMALL
OUTLINE (µSOIC)
0.0256
BSC
12.0˚
±4˚
0.012
±0.003
0.008
0˚ - 6˚
0.0965
±0.003
0.006
±0.006
R .003
0.006
±0.006
0.118
±0.004
0.16
±0.003
3.0˚
±3˚
12.0˚
±4˚
0.0215
1
±0.006
0.020
0.020
0.037
Ref
1
2
0.116
±0.004
0.034
±0.004
0.116
±0.004
0.040
±0.003
0.013
±0.005
0.118
±0.004
0.004
±0.002
0.118
±0.004
All package dimensions in inches
50
µSOIC devices per tube
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
21
ORDERING INFORMATION
Temperature Range
Model
Package Type
SP6660CP . ............................................. 0˚C to +70˚C .............................................. 8-Pin PDIP
SP6660EP . ............................................ -40˚C to +85˚C ............................................ 8-Pin PDIP
SP6660CN . ............................................. 0˚C to +70˚C ........................................... 8-Pin NSOIC
SP6660EN . ............................................ -40˚C to +85˚C ......................................... 8-Pin NSOIC
SP6660CU . ............................................. 0˚C to +70˚C ........................................... 8-Pin µSOIC
SP6660EU . ............................................ -40˚C to +85˚C ......................................... 8-Pin µSOIC
SP6660EB .......................................................................................................... Evaluation Board
Please consult the factory for pricing and availability on a Tape-On-Reel option.
Available in lead free packaging. To order, add "-L" suffix to the part number.
Example: SP6660EU/TR=Tape & Reel. SP6660EU-L/TR = lead free.
Co rp o ra tio n
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: sales@sipex.com
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
22
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