Document
NJU7660A
VOLTAGE CONVERTER
GENERALDESCRIPTION
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 (VOUT= -VIN) converter requires only two capacitors, and positive twofold voltage(VOUT=2VIN) 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)
High-efficiency voltage conversion rate
:+3.0V to +10V(for Twofold voltage converter) :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
18 27 36 45
NJU7660AM NJU7660AV
PIN FUNCTION
1. N.C. 2. C+
:Non Connection :Charge pump Capacitor(+) Connecting pin
3. GND 4. C-
:Ground pin :Charge pump Capacitor(-) Connecting pin
5. VOUT 6. VR
:Voltage Output pin :Voltage Regulator Control pin
7. OSC 8. V+
:Oscillation Capacitor Connecting pin :Power Supply pin
PRODUCT CLASSIFICATION
Device Name
NJU7660A NJU7660B
Oscillation Frequency 5kHz typ. 200kHz typ.
Output Resistance
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
Oscillator
2
Voltage Level Converter
V C C
Power Source
OSC VR
GND
Q4
Q1 Q3
VOUT
Q2
Logic Circuit
ABSOLUTE MAXIMUM RATINGS
(Ta=25C)
PARAMETER Supply Voltage OSC Pin Voltage
VR Pin Voltage VR Pin Current (*3) Output Short
Power Dissipation
Junction Temperature Range Operating Temperature Range Storage Temperature Range
SYNBOL V+ VOSC VVR IVR
PD
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
DMP8
470(*1) 600(*2)
SSOP8
410(*1) 510(*2)
- 40 ~ +150
- 40 ~ + 85
- 40 ~ +150
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 PEF VEF
Zosc
(Unless otherwise noted, V+=5.0V, COSC=0, Ta=25C
TEST CONDITION
MIN. TYP. MAX. UNIT
RL=
RL=10k
VR=OPEN VR=GND
RL=10k
VR=OPEN VR=GND
IOUT=20mA V+=2V, IOUT=3mA, VR=GND
RL=5k
RL= V+=2V
V+=5V
-
40 130
A
3.0 - 6.5 V
1.5 - 3.5 V
3.0 - 10 V
1.5 - 3.5 V
-
55 100
- - 300
- 5 - kHz
90 98 -
%
97 99.9 -
%
- 1.0 - 0.1 - 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
on 4 layers board 600
Power Dissipation PD(mW)
400 on 2 layers board
200
0 -50
-25
0 25 50 75 Temperature : Ta(°C)
100 125 150
Power Dissipation PD(mW)
NJU7660AV PowerDissipation (Topr=-40~+85°C,Tj=150°C)
800
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
The measurement circuit diagram of negative voltage is shown below. VR pin must connect to GND or Open according to the operating voltage as follows:
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.
TYPICALAPPLICATION
C1 10F
NC V
C+ OSC
NJU7660A
GND
VR
VIN=1.5V~10V C3 10F
COSC
RL
C-
VOUT
(*5)
(*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.
VOUT= -VIN C2 10F
1-1 Negative Voltage Output 1 1.5V to 3.5V operation
1-2 Negative Voltage Output 2 3.5V to 10V operation
VIN=1.5V~3.5V
VIN=3.5V~10.0V
C1 + 10F -
1 N.C V+ 8 2 .