SP6660 Datasheet, PDF (5/22 Pages) Sipex Corporation – 200mA Charge Pump Inverter or Doubler

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
I_S
V+
8
+V_IN
CAP+
2
SP6660
7 ^OSC
C1
GND
3
LV
6
CAP- ₄
5 ^OUT
I_L
R_L
C2
V_OUT
Figure 1. SP6660 Test Circuit for the Voltage Inverter
+V_IN
I_S ^{TEST CIRCUIT: VOLTAGE DOUBLER}
FC
1
+V
8
CAP+
2
SP6660
7
OSC
GND
3
C1
LV
6
CAP- ₄
5 ^OUT
V_OUT
C2
R_L
Figure 2. Test Circuit for the Positive Voltage Doubler
SP6660DS/11
SP6660 200mA Charge Pump Inverter or Doubler
5
© Copyright 2000 Sipex Corporation