NJU7660A
VOLTAGE CONVERTER
GENERAL DESCRIPTION
NJU7660A is a CMOS switched capacitor, voltage converter
designed to be an Improved direct replacement of popular 7660/1044.
NJU7660A provides several voltage conversion functions.
The application circuit of negative voltage (V
OUT
= -V
IN
) converter
requires only two capacitors, and positive twofold voltage(V
OUT
=2V
IN
)
converter requires two capacitors and two diodes as external components.
PACKAGE OUTLINE
NJU7660AM
NJU7660AV
FEATURES
Full Compatible with NJU7660
Correspond to MLCC and electrolytic capacitor
Twofold positive Output
Polarity-converted Negative voltage Output
Operating voltage range
:+1.5V to +10V(for Negative voltage converter)
:+3.0V to +10V(for Twofold voltage converter)
High-efficiency voltage conversion rate
:99.9%(No load, Negative voltage converter)
Few external components
:2 capacitors(Negative voltage converter)
:2 capacitors, 2diode(Twofold voltage converter)
Package Outline
:DMP8, SSOP8
CMOS Technology
PIN CONFIGURATION
PIN FUNCTION
1. N.C.
:Non Connection
2. C
+
:Charge pump Capacitor(+) Connecting pin
3. GND
:Ground pin
4. C
-
:Charge pump Capacitor(-) Connecting pin
5. V
OUT
:Voltage Output pin
6. V
R
:Voltage Regulator Control pin
7. OSC
:Oscillation Capacitor Connecting pin
8. V
+
:Power Supply pin
1
2
3
4
8
7
6
5
NJU7660AM
NJU7660AV
PRODUCT CLASSIFICATION
Device Name
NJU7660A
NJU7660B
Oscillation
Frequency
Output
Resistance
5kHz typ.
200kHz typ.
55 typ.
30 typ.
Operating
Current
40A typ.
800A typ.
C1/C2 capacitor
10F
1F
Status
M.P
PLAN
Ver.2014-05-20
-1-
NJU7660A
BLOCK DIAGRAM
V
＋
Oscillator
÷2
Voltage Level
Converter
C
＋
C
−
Q
4
Q
1
Power
Source
Q
2
Logic
Circuit
Q
3
V
OUT
OSC
V
R
GND
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYNBOL
Supply Voltage
V
+
OSC Pin Voltage
V
R
Pin Voltage
V
R
Pin Current (*3)
Output Short
Power Dissipation
Junction Temperature Range
Operating Temperature Range
Storage Temperature Range
V
OSC
V
VR
I
VR
P
D
Tj
Topr
Tstg
RATINGS
10.5
+
-0.3
~
(V +0.3) @ V
+
< 5.5
(V
+
-5.5)
~
(V
+
+0.3) @ V
+
> 5.5
-0.3
~
(V
+
+0.3) @ V
+
< 5.5
(V
+
-5.5)
~
(V
+
+0.3) @ V
+
> 5.5
20
CONTINUITY @ V
+
< 5.5
470(*1)
DMP8
600(*2)
410(*1)
SSOP8
510(*2)
- 40
~
+150
- 40
~
+ 85
- 40
~
+150
(Ta=25C)
UNIT
V
V
V
A
mW
°C
°C
°C
(*1): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 2Layers)
(*2): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 4Layers,internal Cu area: 74.2×74.2mm)
(*3): Connecting any input terminal to voltages greater than V+ or less than GND may cause destructive latchup. It is recommended that
no inputs from sources operating from external supplies be applied prior to
“power-up”
of the NJU7660A
INPUT VOLTAGE RANGE
V
+
=1.5V to 10V (for Negative Voltage Converter)
V
+
=3.0V to 10V (for Twofold Voltage Converter)
-2-
Ver.2014-05-20
NJU7660A
ELECTRICAL CHARACTERISTICS
PARAMETER
Operating Current
Operating Voltage 1
(Without Dx)
Operating Voltage 2
(With Dx)
Output Resistance
Oscillation Frequency
Power Conversion Rate
Voltage Conversion Rate
Oscillation Circuit
Impedance
SYMBOL
I
+
V
+H1
V
+L1
V
+H2
V
+L2
Ro
Fo
(Unless otherwise noted,
V
+
=5.0V, C
OSC
=0, Ta=25C
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
R
L
=
R
L
=10k
R
L
=10k
I
OUT
=20mA
V =2V, I
OUT
=3mA, V
R
=GND
+
V
R
=OPEN
V
R
=GND
-
3.0
1.5
40
-
-
130
6.5
3.5
A
V
V
V
R
=OPEN
V
R
=GND
3.0
1.5
-
-
-
-
-
55
-
10
3.5
100
300
-
-
-
-
-
V
V
P
EF
V
EF
Zosc
R
L
=5k
R
L
=
V =2V
+
V =5V
+
90
97
-
-
5
98
99.9
1.0
0.1
kHz
%
%
M
(*4): The twofold voltage converter operates over 3.0V
Ver.2014-05-20
-3-
NJU7660A
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJU7660AM
Pow erDissipation
(Topr=-40~+85°C,Tj=150°C)
800
Power Dissipation P
D
(mW)
on 4 layers board
600
400
on 2 layers board
200
0
-50
-25
0
25
50
75
Temperature : Ta(°C)
100
125
150
NJU7660AV PowerDissipation
(Topr=-40~+85°C,Tj=150°C)
800
Power Dissipation P
D
(mW)
600
on 4 layers board
400
on 2 layers board
200
0
-50
-25
0
25
50
75
Temperature : Ta(°C)
100
125
150
-4-
Ver.2014-05-20
NJU7660A
TEST CIRCUIT
V
IN
=1.5V~10V
The measurement circuit diagram of negative voltage is
shown below. V
R
pin must connect to GND or Open
according to the operating voltage as follows:
C1
NC
C
+
V
＋
C3
10F
OSC
C
OSC
R
L
V < 3.5V :Connected to GND
V
+
3.5V :OPEN
The oscillation frequency can be lowered by connected
external capacitor to the OSC pin, furthermore it can be
also driven by external clock generator.
TYPICAL APPLICATION
（1-1）Negative
Voltage Output 1
1.5V to 3.5V operation
V
IN
=1.5V~3.5V
+
NJU7660A
V
R
GND
-
10F
C
V
OUT
(*5)
V
OUT
= -V
IN
C2
(*5):Connect the diode as the VOUT pin in the figure above in
the case of V+ is 6.5V or more.
In the case of lee than 6.5V , V+ does not require this diode.
10F
（1-2）Negative
Voltage Output 2
3.5V to 10V operation
V
IN
=3.5V~10.0V
1 N.C
2 C
C1
10F
+
3 GND
-
4 C
-
+
V
+
8
+
OSC 7
V
R
6
V
OUT
5
-
+
C3
-
10F
V
OUT
=-V
IN
C2
10F
1 N.C
2 C
C1
10F
+
3 GND
-
4 C
-
+
V
+
8
+
OSC 7
V
R
6
V
OUT
5
C3
-
10F
V
OUT
=-V
IN
C2
10F
( )
-
+
NJU7660A
NJU7660A
*Its Can also be used ceramic capacitor.(C1,C2,C3)
*Capacitance of C3 is equal to C1,C2 or more.
*Can also be used ceramic capacitor.(C1,C2,C3)
*Capacitance of C3 is equal to C1,C2 or more.
(*6): V
R
pin must connect to GND or Open according to the operating voltage as follows:
V
+
< 3.5V :Connected to GND
V
+
3.5V :OPEN
(*7): In case of the operation voltage is 6.5V or more, a Diode must be connected to V
OUT
pin. If it is less than 6.5V, the
Diode is not required
（2）Twofold
positive Voltage Output
V
IN
＝3.0V∼10V
+
C3
10F
8
＋
−
D
1
D
2
＋
C1
+
10F
-
−
1 N.C
2 C
+
V
OSC 7
V
R
6
V
OUT
5
3 GND
4 C
-
V
OUT
=2V
IN
-2V
F
*V
F
:
Forward voltage of the diode.
C2
10F
NJU7660A
*Can also be used ceramic capacitor.(C1,C2,C3)
*Capacitance of C3 is equal to C1,C2 or more.
Ver.2014-05-20
-5-
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
