CE7660
Charge Pump DC-DC Voltage Converter
Charge Pump
CE7660
DC-DC Voltage Converter
„
FEATURES：
CE7660 is a charge pump dc-to-dc voltage
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Wide input voltage range: 2.5V~10;
converter using CMOS technology and
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Low power supply: 50uA @5V input;
optimization design. It converters a +2.5V
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Efficient voltage conversion:99.9%;
to +10V input to a corresponding -2.5V to
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Good power efficiency: 98%;
-10V output using only two low cost
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Easy
„
INTRODUCTION：
external
capacitors.
The
on-board
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of 10KHz. Operation below 10 KHz (for
supply
possible
by
current
applications)
connecting
an
use:
only
two
external
capacitors required;
oscillator operates at a nominal frequency
lower
to
Compatible
with
RS232
negative
power supply standard;
is
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Cascade connection(two devices are
connected, VOUT = -2VDD or
external
capacitor from OSC to ground.
-3VDD)
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Available in SOP8&DIP8 Packages
„
APPLICATIONS：
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RS-232 Power Supply
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Operation Amplifier Supply
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LCD Display Module
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Instrument Product Supply
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Supply Voltage Splitter VOUT＝±VDD/2
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Negative Supply for dynamic RAMS
„
PIN CONFIGURATION：
DIP8
V2.1
PIN NUMBER
PIN NAME
DESCRIPTION
1
NC
No connection
2
CAP+
Connecting external capacitor(+) pin
3
VSS
Ground pin
4
CAP-
Connecting external capacitor(-) pin
5
VOUT
6
LV
7
OSC
8
VDD
SOP8
1(8)
Voltage
Low
output pin
voltage selection pin
Connecting
oscillation capacitor pin
Power supply pin
CE7660
Charge Pump DC-DC Voltage Converter
„
BLOCK DIAGRAM
„
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNITS
Input voltage
VDD
13
V
SOP8
PD
300
mW
DIP8
PD
500
mW
Operating Temperature
Topr
-40~+85
℃
Storage Temperature
Tstg
-40~+125
℃
Soldering temperature and time
Tsolder
260℃, 10s
Power
Dissipation
ELECTRICAL CHARACTERISTICS
„
（C1=C2=10μF，T=25℃）
TEST CONDITIONS
MIN
TYP
MAX
UNITS
—
2.5
5.0
10.0
V
5V
RL=∞
—
50
100
uA
Oscillator Frequency
5V
—
ROUT
Output Resistance
5V
IOUT=20mA
—
60
100
Ώ
VCON－EFF
Voltage Conversion
Efficiency
5V
RL=∞
99
99.9
—
％
PEFF
Power Efficiency
5V
RL＝5kΏ
96
98
—
％
SYMBOL
ITEM
VDD
VDD
CONDITIONS
Supply Voltage
—
IQ
Supply Current
fOSC
V2.1
2(8)
10
KHz
CE7660
Charge Pump DC-DC Voltage Converter
„
TYPICAL CHARACTERISTICS
1.
VOUT vs. IOUT
2.
Efficiency vs. IOUT
„
THEORY OF OPERATION
CE7660 together with two external capacitors C1、C2 complement a voltage Inverter.
Capacitor C1 is charged to a voltage VDD, for the first half cycle when switches K1 and K2
are closed ( while switches K3 and K4 are open during this half cycle); During the second
half cycle of operation, switches K3 and K4 are closed, with K1 and K2 open, thereby
shifting capacitor C2 negatively to –VDD.
V2.1
3(8)
CE7660
Charge Pump DC-DC Voltage Converter
„
TYPICAL APPLICATIONS
1. Simple negative voltage converter
2. Positive voltage doubler
3. Positive voltage multiplier
4. External switching frequency
V2.1
5. Lower switching frequency
4(8)
CE7660
Charge Pump DC-DC Voltage Converter
6. Voltage splitter
7.
8. -2VDD voltage multiplier
9. -3VDD voltage multiplier
V2.1
5(8)
Negative and positive converter
CE7660
Charge Pump DC-DC Voltage Converter
„
PACKAGING INFORMATION
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DIP8
V2.1
6(8)
CE7660
Charge Pump DC-DC Voltage Converter
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V2.1
SOP8
7(8)
CE7660
Charge Pump DC-DC Voltage Converter
© Nanjing Chipower Electronics Inc.
Chipower cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a
Chipower product. No circuit patent license, copyrights or other intellectual property rights are implied.
Chipower reserves the right to make changes to their products or specifications without notice. Customers
are advised to obtain the latest version of relevant information to verify, before placing orders, that
information being relied on is current and complete.
V2.1
8(8)