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SP6660EN-L/TR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
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
SP6660DS/11 SP6660 200mA Charge Pump Inverter or Doubler © Copyright 2000 Sipex Corporation
6
Inverter
Doubler
HF
LF
HF
LF
Figure 3A and 3B Supply Current vs. Supply Voltage
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
= +3.6V, T
AMB
= 25
o
C 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
.
Supply Current (mA)Supply Current (mA)
Figure 4. Supply Current vs. Oscillator Frequency
Supply Current (mA)
Supply Voltage (V)
Supply Voltage (V)
3A: Doubler
3B: Inverter
Oscillator Frequency (kHz)
4
3
2
1
0
1 10 100 1000
0.8
0.6
0.4
0.2
0
1 1.5 2 2.5 3 3.5 4 4.5
0.6
0.5
0.4
0.3
0.2
0.1
0
1.5 2 2.5 3 3.5 4 4.5
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

SP6660EN-L/TR

Mfr. #:
Buy SP6660EN-L/TR
Manufacturer:
MaxLinear
Description:
Switching Voltage Regulators 200mA Inverter or Doubler
Lifecycle:
New from this manufacturer.
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