®
SP6660
200mA Charge Pump Inverter or Doubler
s
Inverts or Doubles Input Supply Voltage
s
93% Power Efficiency at 3.6V
s
10kHz/80kHz Selectable Oscillator
s
External Oscillator up to 700KHz
s
5Ω Output Resistance at 3.6V
s
Low Voltage Battery Operation
s
Ideal for 3.6V Lithium Ion Battery
s
High Output Current – 200mA
s
Pin-Compatible High-Current Upgrade of
the ICL7660 and 660 Industry Standard
s
Smallest Package Available for the 660
Industry Standard – 8pin
µSOIC
Now
Available
in Lead Free
Packaging
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
can be converted from a +1.5V to +4.25V input. As a Voltage Doubler, the
SP6660
can provide
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
device are operational amplifier and interface power supplies, medical instruments, and hand-
held and laptop computers. The
SP6660
is available in 8-pin DIP, SOIC, and
µSOIC
packages.
TYPICAL CIRCUIT: VOLTAGE INVERTER
+V
IN
+1.5V to +4.25V
TYPICAL CIRCUIT: VOLTAGE DOUBLER
FC
CAP+
GND
C1
1µF to 150µF
CAP-
1
+V
8
+V
IN
+1.5V to +4.25V
FC
1
CAP+
GND
+V
8
2
3
SP6660
7
LV
6
OSC
2
3
DOUBLE
VOLTAGE
OUTPUT
SP6660
7
LV
OSC
C2
1µF to 150µF
4
5
OUT
NEGATIVE
VOLTAGE
OUTPUT
C1
1µF to 150µF
CAP-
4
6
5
OUT
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
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.
Power Supply Voltage
(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)
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 (T
AMB
= 70˚C)
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
Lead Temperature (soldering 10s)..............................+300˚C
SPECIFICATIONS
PARAMETER
MIN.
TYP.
MAX.
UNITS
CONDITIONS
Inverter Circuit at Low Frequency with 150
µ
F Capacitors
V+ = 3.6V, C1 = C2 = 150µF, FC = open, T
AMB
= T
MIN
to T
MAX
; refer to
Figure 1
test circuit. Note 2
Supply Voltage
Supply Current
Output Current
Oscillator Input Current
Oscillator Frequency
Output Resistance
Voltage Conversion Efficiency
Power Efficiency
99.00
88
80
63
5
200
±1
10
5.2
99.96
94
85
70
20
10
1.5
0.93
0.4
4.25
0.8
V
mA
mA
µA
kHz
Ω
%
%
I
L
= 100mA, Note 3
No Load
R
L
= 500
Ω
I
L
= 100mA
I
L
= 200mA
R
L
= 500
Ω
, Note 4
No Load
Doubler Circuit at Low Frequency with 150
µ
F Capacitors
V+ = 3.6V, C1 = C2 = 150µF, FC = open, T
AMB
= T
MIN
to T
MAX
; refer to
Figure 2
test circuit. Note 2
Supply Voltage
Supply Current
Output Current
Oscillator Input Current
Oscillator Frequency
Output Resistance
Voltage Conversion Efficiency
Power Efficiency
99.00
91
89
79
5
200
±1
10
5.2
99.96
96
93
85
20
10
2.5
1.5
0. 4
4.25
0.8
V
mA
mA
µA
kHz
R
L
= 1k
Ω
, Note 4
No Load
Ω
%
%
I
L
= 100mA, Note 3
No Load
R
L
= 1K
Ω
I
L
= 100mA
I
L
= 200mA
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
2
SPECIFICATIONS (continued)
PARAMETER
MIN.
TYP.
MAX.
UNITS
CONDITIONS
Inverter Circuit at High Frequency with 22
µ
F Capacitors
V+ = 3.6V, C1 = C2 = 22µF, FC = V+, T
AMB
= T
MIN
to T
MAX
; refer to
Figure 1
test circuit. Note 2
Supply Voltage
Supply Current
Output Current
Oscillator Input Current
Oscillator Frequency
Output Resistance
Voltage Conversion Efficiency
Power Efficiency
99.00
86
80
63
40
200
±8
80
5.0
99.96
92
86
71
160
10
1.5
0.97
0.6
4.25
1.5
V
mA
mA
µA
kHz
Ω
%
%
I
L
= 100mA, Note 3
No Load
R
L
= 500
Ω
I
L
= 100mA
I
L
= 200mA
R
L
= 500
Ω
, Note 4
No Load
Doubler Circuit at HIgh Frequency with 22
µ
F Capacitors
V+ = 3.6V, C1 = C2 = 22µF, FC = V+, T
AMB
= T
MIN
to T
MAX
; refer to
Figure 2
test circuit. Note 2
Supply Voltage
Supply Current
Output Current
Oscillator Input Current
Oscillator Frequency
Output Resistance
Voltage Conversion Efficiency
Power Efficiency
99.00
90
89
79
40
200
±8
80
5.0
99.96
94
93
85
160
10
2.5
1.6
0.6
4.25
1.5
V
mA
mA
µA
kHz
Ω
%
%
I
L
= 100mA, Note 3
No Load
R
L
= 1K
Ω
I
L
= 100mA
I
L
= 200mA
R
L
= 1k
Ω
, Note 4
No Load
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
FC 1
CAP+ 2
GND 3
CAP-
4
SP6660
8 V+
7 OSC
6 LV
5 OUT
PIN ASSIGNMENTS
Pin 1— FC — Frequency Control for the
internal oscillator. FC = open,f
OS C
= 10KHz
typical; FC = V+, f
OSC
= 80KHz typical
Pin 2 — CAP+ — Connect to the positive
terminal of the charge pump capacitor.
Pin 5 — OUT — (Voltage Inverter Circuit)
Negative voltage output pin.
Pin 5 — OUT — (Positive Voltage Doubler
Circuit) Ground pin for power supply.
Pin 6 — LV
Low-voltage operation input pin in 660
circuits. In SP6660 circuits can be connected
to GND, OUT or left open as desired with no
effect.
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 8 — V+ — (Voltage Inverter Circuit)
Positive voltage input pin for the power
supply.
Pin 8 — V+ — (Positive Voltage Doubler
Circuit) Positive voltage output.
Pin 3 — GND — (Voltage Inverter Circuit)
Ground.
Pin 3 — GND — (Positive Voltage Doubler
Circuit) Positive supply voltage input.
Pin 4 — CAP- — Connect to the negative
terminal of the charge pump capacitor.
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
4
DESCRIPTION
The
SP6660
Charge Pump DC-DC Voltage
Converter either inverts or doubles the input
voltage. As a negative voltage inverter, as shown
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
input can be converted to a +5.0V to +8.5V output.
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.
TEST CIRCUIT: VOLTAGE INVERTER
FC
1
V+
8
I
S
+V
IN
CAP+
C1
GND
2
3
SP6660
7
6
OSC
LV
CAP-
4
5
OUT
I
L
C2
R
L
V
OUT
Figure 1. SP6660 Test Circuit for the Voltage Inverter
+V
IN
I
S
FC
1
CAP+
GND
C1
CAP-
+V
8
V
OUT
TEST CIRCUIT: VOLTAGE DOUBLER
2
3
SP6660
7
LV
OSC
C2
R
L
6
4
5
OUT
Figure 2. Test Circuit for the Positive Voltage Doubler
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
© Copyright 2000 Sipex Corporation
5
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