NJU7665 Series
-1-
Ver.2005-02-28
SMALL PACKAGE VOLTAGE INVERTER
■ GENERAL DESCRIPTION ■ PACKAGE OUTLINE
The NJU7665 series is a voltage inverter incorporated RC
oscillator, pre-buffer and power-MOS, which generates a
polarity-converted negative voltage from +1.5V to +5.5V.
The switching frequency is fixed by internal RC oscillator and the
following line-up of 3 version are available to select.
The NJU7665 series is in MTP-5 package and it is suitable for
battery use items and other portable items.
■ FEATURES
• Input Voltage : 1.5 to 5.5V
• Switching Frequency : fsw = 7.5k, 75k, 150kHz
• Low Output Resistance : 75Ω MAX. (C version, C = 1µF, V
IN
= 3V .)
• Low Operating Current : 100µA MAX. (A version)
• C-MOS Technology
• Package Outline : MTP-5
■ LINE-UP TABLE
TYPE NO. Switching Frequency Supply Current Output Resistance
NJU7665A 7.5kHz (typ.) 100µA (max.) 1kΩ (max.)
NJU7665B 75kHz (typ.) 0.65mA (max.) 100Ω (max.)
NJU7665C 150kHz (typ.) 1.4mA (max.) 75Ω (max.)
■ BLOCK DIAGRAM ■ PIN CONFIGURATION
■ TERMINAL DESCRIPTION
Terminal No. Symbol Function
1 V
OUT
Output Voltage
2 V
IN
Power Supply Terminal
3 C
-
Charge Pump Capacitor (-) Connecting Terminal
4 GND Ground Terminal
5 C
+
Charge Pump Capacitor (+) Connecting Terminal
NJU7665XF
NJU7665 Series
- 2 -
Ver.2005-02-28
■ ABSOLUTE MAXIMUM RATINGS (T
a
= 25ºC)
PARAMETER SYMBOL RATINGS UNIT
Input Supply Voltage V
IN
-0.3 to 6.0 V
Power Dissipation P
D
200 mW
Operating Temperature T
opr
-40 to + 85 ºC
Storage Temperature T
stg
-55 to +125 ºC
Note1) Decoupling capacitor should be connected between V
IN
and GND due to the stabilized operation for the IC.
■ ELECTRICAL CHARACTERISTICS
A version (V
IN
= 3.0V, C1 = C2 = 1µF, T
a
= 25°C)
PARAMETER SYMBOL CONDITION MIN. TYP. MAX. UNIT
Supply Current I
IN
RL = ∞ – – 100 µA
Input Supply Voltage V
IN
-40 °C ≤ Ta ≤ 85°C 1.5 – 5.5 V
Output Resistance R
OUT
I
OUT
= 500µA – – 1.0 kΩ
Oscillation Frequency F
O
4.5 7.5 10.5 kHz
Power Conversion Rate P
EF
RL = 500kΩ – 90 – %
Voltage Conversion Rate V
EF
RL = ∞ 90 99.3 – %
B version (V
IN
= 3.0V, C1 = C2 = 1µF, T
a
= 25°C)
PARAMETER SYMBOL CONDITION MIN. TYP. MAX. UNIT
Supply Current I
IN
RL = ∞ – – 0.65 mA
Input Supply Voltage V
IN
-40 °C ≤ Ta ≤ 85°C 1.5 – 5.5 V
Output Resistance R
OUT
I
OUT
= 5mA – – 100 Ω
Oscillation Frequency F
O
40 75 100 kHz
Power Conversion Rate P
EF
RL = 500kΩ – 90 – %
Voltage Conversion Rate V
EF
RL = ∞ 90 99.3 – %
C version (V
IN
= 3.0V, C1 = C2 = 1µF, T
a
= 25°C)
PARAMETER SYMBOL CONDITION MIN. TYP. MAX. UNIT
Supply Current I
IN
RL = ∞ – – 1.4 mA
Input Supply Voltage V
IN
-40 °C ≤ Ta ≤ 85°C 1.5 – 5.5 V
Output Resistance R
OUT
I
OUT
= 10mA – – 75 Ω
Oscillation Frequency F
O
80 150 200 kHz
Power Conversion Rate P
EF
RL = 500kΩ – 90 – %
Voltage Conversion Rate V
EF
RL = ∞ 90 99.3 – %
NOTE2) Please minimize the wiring impedance of C+, C- terminals due to the power conversion rate.
NJU7665 Series
-
3
-
Ver.2005-02-28
■ APPLICATION CIRCUIT
1. Negative Voltage Output Circuit
2. Parallel Connection Circuit
The following circuit reduce the output impedance.
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
