UNISONIC TECHNOLOGIES CO., LTD
ME7660 CMOS IC
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Copyright © 2011 Unisonic Technologies Co., Ltd QW-R502-730.a
CHARGE PUMP DC-DC
VOLTAGE CONVERTER
DESCRIPTION
ME7660 is a charge pump DC-DC voltage converter using
AL-gate CMOS technology and optimization design. It converters a
+1.5V to +10V input to a corresponding -1.5V to -10V output using only
two external capacitors, eliminating inductors and their associated
cost, size and EMI. The on-board oscillator operates at a nominal
frequency of 10KHZ. Operation below 10 KHZ (for lower supply current
applications) is possible by connecting an external capacitor from OSC
to ground.
FEATURES
* Converts +5V Logic supply to +5V
* Wide input voltage range:1.5V~10V
* Efficient voltage conversion:99.9%
* Good power efficiency:98%
* Low power supply:50uA@5Vin
* Only two external capacitors required
* Compatible with RS232 negative power supply standard
* No Dx diode needed for high voltage operation
SOP-8
ORDERING INFORMATION
Ordering Number Package Packing
Lead Free Halogen Free
ME7660L-SO8-R ME7660G-SO8-R SOP-8 Tape Reel
ME7660L-SO8-T ME7660G-SO8-T SOP-8 Tube
ME7660L-S08-R
(1)Packing Type
(2)Package Type
(1) R: Tape Reel, T: Tube
(2) S08: SOP-8
(3) G:Halogen Free, L: Lead Free
(3)Lead Free
ME7660 CMOS IC
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PIN CONFIGURATION
GND
1
2
3
4
8
7
6
5
NC
CAP+
VOUT
LV
OSC
CAP-
V+
PIN DESCRIPTION
PIN NO. SYMBOL DESCRIPTION
1 NC No connection
2 CAP+ Connection external capacitor (+) pin
3 GND Ground Pin
4 CAP- Connection external capacitor (-) pin
5 VOUT Voltage output pin
6 LV Low voltage selection pin
7 OSC Connecting oscillation capacitor pin
8 V+ Power supply pin
ME7660 CMOS IC
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www.unisonic.com.tw QW-R502-730.a
BLOCK DIAGRAM
RC
OSCILLATOR
VOLTAGE-LEVEL
TRANSLATOR
1/2
INTERNAL
VOLTAGE
REGULATOR
LOGIC
NETWORK
CAP-
(8)
(7)
(6)
(2) (4)
(5)
(3)
S1
S2
S3
S4
CAP
VOUT
V
OSC
LV
GND
ME7660 CMOS IC
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www.unisonic.com.tw QW-R502-730.a
ABSOLUTE MAXIMUM RATING
PARAMETER SYMBOL RATINGS UNIT
Supply Voltage VIN 10.5 V
LV and OSC Inputs Voltage V+<5.5V VL
X
-0.3~(V++0.3) V
V+>5.5V VOSC (V+-5.5)~(V++0.3) V
Power Dissipation(TA≤75 )℃ P
D 470 mW
Current Into LV V+>3.5V ILV 20 uA
Operating Temperature TOPR -40 ~ +85 ℃
Storage Temperature TSTG -65 ~ +150 ℃
ELECTRICAL CHARACTERISTICS (V+=5V,COSC=0)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Supply Current I+ RL=∞ 60 120 uA
Supply Voltage High V+H LV Open 3 10 V
Low V+L LV to GND 1.5 4 V
Output Resistance ROUT IOUT=20mA, TA=25℃ 110 Ω
IOUT=3mA, V+=2V,TA=25℃ 220 Ω
Oscillator Frequency FOSC Pin 7 open 10 kHz
Power Efficiency PEFF R
L=5kΩ 90 98 %
V
oltage Conversion Efficiency VEFF RL=∞ 98 99.9 %
ME7660 CMOS IC
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www.unisonic.com.tw QW-R502-730.a
TESTING CIRCUIT
TYPICAL APPLICATION CIRCUIT
Above figure is the basic application circuit to provide a negative supply from -1.5V ~ -10V while a positive
supply from +1.5V ~ +10V is available. When V+=+5V, the output resistance is about 100Ω; The output voltage is
-4V while the load current is 10mA.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
