SP6660DS/11 SP6660 200mA Charge Pump Inverter or Doubler
Copyright 2000 Sipex Corporation
1
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
5
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
SOIC
200mA Charge Pump Inverter or Doubler
SP6660
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 400
A 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
SOIC
packages.
OSC
OUT
SP6660
+V
IN
+1.5V to +4.25V
C1
1
F to 150
F
5
1
2
7
4
FC
C2
1
F to 150
F
CAP+
CAP-
GND
6
8
3
LV
NEGATIVE
VOLTAGE
OUTPUT
TYPICAL CIRCUIT: VOLTAGE INVERTER
+V
OSC
OUT
SP6660
+V
IN
+1.5V to +4.25V
C1
1
F to 150
F
5
1
2
7
4
FC
C2
1
F to 150
F
CAP+
CAP-
GND
6
8
3
LV
DOUBLE
VOLTAGE
OUTPUT
TYPICAL CIRCUIT: VOLTAGE DOUBLER
+V
SP6660DS/11 SP6660 200mA Charge Pump Inverter or Doubler
Copyright 2000 Sipex Corporation
2
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=
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)
SPECIFICATIONS
OUT and V+ Continuous Output Current.....................250mA
Output Short-Circuit Duration to GND.................................1s
Operating Temperature Ranges
SP6660C_........................................0C to +70C
SP6660E_.....................................-40C to +85C
Continuous Power Dissipation (T
AMB
= 70C)
PDIP (derate 9.09mW/C above +70C)..................727mW
NSOIC (derate 5.88mW/C above +70C)...............471mW
SOIC (derate 4.10mW/C above +70C)................330mW
Operating Temperature...................................-40C to +85C
Storage Temperature....................................-65C to +150C
Lead Temperature (soldering 10s)..............................+300C
SP6660DS/11 SP6660 200mA Charge Pump Inverter or Doubler
Copyright 2000 Sipex Corporation
3
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 150
F, 0.2 maximum ESR, tantalum or 22
F, 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.
SPECIFICATIONS (continued)
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SP6660DS/11 SP6660 200mA Charge Pump Inverter or Doubler
Copyright 2000 Sipex Corporation
4
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 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.
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.
PINOUT
CAP+
FC
GND
CAP-
OUT
LV
OSC
V+
SP6660
8
7
4
3
2
1
5
6
SP6660DS/11 SP6660 200mA Charge Pump Inverter or Doubler
Copyright 2000 Sipex Corporation
5
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.
Figure 1. SP6660 Test Circuit for the Voltage Inverter
OSC
OUT
SP6660
+V
IN
C1
5
1
2
7
4
CAP+
CAP-
GND
6
8
3
LV
TEST CIRCUIT: VOLTAGE INVERTER
FC
V+
R
L
C2
I
L
I
S
V
OUT
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.
Figure 2. Test Circuit for the Positive Voltage Doubler
OSC
OUT
SP6660
+V
IN
C1
5
1
2
7
4
C2
CAP+
CAP-
GND
6
8
3
LV
TEST CIRCUIT: VOLTAGE DOUBLER
+V
I
S
FC
R
L
V
OUT
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