NJU7780/81
LOW DROPOUT VOLTAGE REGULATOR
!
GENERAL DESCRIPTION
The NJU7780/81 is a low dropout voltage regulator with ON/OFF
Control.
Advanced CMOS technology achieves low quiescent current.
It is suitable for battery operating applications.
NJU7781 features shunt switch which improves turn off response
of output voltage when ON/OFF control is used.
!
FEATURES
"
High Ripple Rejection
65dB typ. (f=400Hz, Vo=3V)
"
Low quiescent Current
Iq=20µA (Io=0mA, V
CONT
=V
IN
)
"
Output capacitor with 1.0µF ceramic capacitor
"
Output Current
Io(max)=300mA
"
High Precision Output
Vo±1.0%
"
Low Dropout Voltage
0.15V typ. (Io=150mA,Vo=3.0V)
"
ON/OFF Control
(Active High)
"
Shunt Switch
Only NJU7781
"
Internal Over Current Protection
"
Internal Thermal Overload Protection
"
CMOS technology
"
Package outline
SOT-89-5
!
PIN CONFIGURATION
5
2
4
!
PACKAGE OUTLINE
NJU7780/81U1
1. CONTROL
2. GND
3. N.C.
4. V
OUT
1
2
3
5. V
IN
!
EQUIVALENT CIRCUIT
V
IN
Thermal
Protection
V
OUT
V
IN
Thermal
Protection
V
OUT
CONTROL
Output
Control
CONTROL
Output
Control
Vref
Current
Limit
Vref
Current
Limit
GND
GND
NJU7780
NJU7781
Ver.2007-08-22
-1-
NJU7780/81
!
OUTPUT VOLTAGE RANK LIST (1.5V~5.0V : 0.1V step)
Device Name
Device Name
V
OUT
NJU778xU1-15
1.5V
NJU778xU1-28
NJU778xU1-18
1.8V
NJU778xU1-29
NJU778xU1-21
2.1V
NJU778xU1-03
NJU778xU1-25
2.5V
NJU778xU1-33
V
OUT
2.8V
2.9V
3.0V
3.3V
Device Name
NJU778xU1-04
NJU778xU1-05
V
OUT
4.0V
5.0V
!
ABSOLUTE MAXIMUM RATINGS
(Ta=25°C)
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
V
IN
+10
V
Control Voltage
V
CONT
+10(*1)
V
Power Dissipation
P
D
350(*2)
mW
Operating Temperature
Topr
−40 ∼
+85
°C
Storage Temperature
Tstg
−40 ∼
+125
°C
OFF-state
Io
10
mA
Output Sink Current (*3)
(*1): When input voltage is less than +10V, the absolute maximum control voltage is equal to the input voltage.
(*2): Device itself.
(*3): This maximum rating is applied to NJU7781.
!
Operating voltage
V
IN
=+2.3
∼
+9V (In case of Vo<2.1V version)
!
ELECTRICAL CHARACTERISTICS
(V
IN
=Vo+1V, C
IN
=0.1µF, Co=0.1µF, Ta=25°C)
PARAMETER
SYMBOL
Output Voltage
Input Voltage
Quiescent Current
Quiescent Current
at Control OFF
Output Current
Short Current Limit
Line Regulation
Load Regulation
Dropout Voltage
(*4)
Ripple Rejection
Average Temperature
Coefficient of Output Voltage
Output Noise Voltage
Pull-Down Resistance
Control Voltage for ON-state
Control Voltage for OFF-state
Pull-down Resistance at
OFF-state(*5)
Vo
V
IN
I
Q
I
Q(OFF)
Io
I
LIM
∆Vo/∆V
IN
∆Vo/∆Io
∆V
I-O
RR
∆Vo/∆Ta
V
NO
R
CONT
V
CONT(ON)
V
CONT(OFF)
R
O(OFF)
V
CONT
=0V (V
O
=3.0V Version)
TEST CONDITION
Io=30mA
Io=0mA, V
CONT
=V
IN
V
CONT
=0V
Vo - 0.1V(Vo<2.1V)
Vo - 0.3V(Vo≥2.1V)
Vo=0V
V
IN
=Vo+1V∼Vo+6V(Vo<3.0),
V
IN
=Vo+1V∼Vo+9V(Vo≥3.0), Io=30mA
Io=0∼300mA
2.1
≤
V
O
≤
2.6V
2.7
≤
V
O
≤
3.3V
I
O
=150mA
3.4
≤
V
O
≤
5.0V
ein=200mVrms, f=400Hz, I
O
=10mA,
V
O
=3.0V
Ta=0∼85°C, Io=10mA
F=10Hz∼80kHz, I
O
=10mA, V
O
=3.0V
MIN.
-1.0%
-
-
-
300
-
-
-
-
-
-
-
-
-
1.5
1.6
-
–
TYP.
-
-
20
-
-
120
-
-
0.18
0.15
0.12
65
±100
80
5
-
-
190
MAX.
+1.0%
9
40
1
-
-
0.10
0.015
0.25
0.22
0.2
-
-
-
10
-
0.3
–
UNIT
V
V
µA
µA
mA
mA
%/V
%/mA
V
dB
ppm/°
C
µVrms
MΩ
V
V
Ω
(*4): The output voltage excludes under 2.1V.
(*5)
This electrical characteristics is applied to NJU7781.
The above specification is a common specification for all output voltages.
Therefore, it may be different from the individual specification for a specific output voltage.
-2-
Ver.2007-08-22
NJU7780/81
!
TEST CIRCUIT
I
IN
V
IN
C
IN
0.1µF
V
OUT
C
0
1.0µF
*6
(ceramic)
I
OUT
A
V
IN
V
V
OUT
NJU778*
A
V
V
CONT
I
CONT
CONTROL
GND
*6 : Vo
≤
2.0V version, Co=2.2µF(Ceramic)
!
TYPICAL APPLICATION
1
In the case where ON/OFF Control is not required:
V
IN
V
IN
C
IN
0.1µF
V
OUT
C
0
1.0µF
*7
V
OUT
NJU778*
CONTROL
GND
*7: Vo
≤
2.0V version, Co=2.2µF
Connect control terminal to V
IN
terminal
2
In use of ON/OFF CONTROL:
V
IN
V
IN
C
IN
0.1µF
V
OUT
C
0
0.1µF
*7
V
OUT
NJU778*
CONTROL
GND
*7: Vo
≤
2.0V version, Co=2.2µF
State of control terminal:
•“H”→
output is enabled.
•“L”
or “open”
→
output is disabled.
Ver.2007-08-22
-3-
NJU7780/81
!
ELECTRICAL CHARACTERISTICS
●DC
CHARACTERISTICS
3.2
NJU7780/81_3.0V
Output Voltage vs. Input Voltage
@:Ta=25 C
Co=1.0µF(Ceramic)
C
IN
=0.1µF
o
4
NJU7780/81_3.0V
Output Voltage vs. Output Current
3.5
3.1
3
Output Voltage : Vo(V)
3
Io=0A
Output Voltage : Vo(V)
2.5
2
2.9
Io=30mA
1.5
1
@:Ta=25 C
V
IN
=4.0V
Co=1.0µF(Ceramic)
C
IN
=0.1µF
0
100
200
300
400
500
600
700
o
2.8
Io=100mA
0.5
2.7
2.7
2.8
2.9
3
3.1
3.2
3.3
3.4
0
Input Voltage : V
IN
(V)
Output Current : Io(mA)
NJU7780/81_3.0V
Ground Pin Current vs. Output Current
70
0.5
NJU7780/81_3.0V
Dropout Voltage vs. Output Current
60
0.4
Ground Pin Current : I
GND
(uA)
Dropout Voltage:dV
I-O
(V)
@:Ta=25 C
V
IN
=4.0V
Co=1.0µF(Ceramic)
C
IN
=0.1µF
0
50
100
150
200
250
300
350
400
o
50
40
0.3
30
0.2
20
0.1
@:Ta=25 C
Co=1.0µF(Ceramic)
C
IN
=0.1µF
0
0
50
100
150
200
250
300
350
400
o
10
0
Output Current : I
O
(mA)
Output Current:Io(mA)
4
NJU7780/81_3.0V
Output Voltage vs. Control Voltage
3.5
3
Output Voltage : Vo(V)
2.5
2
1.5
1
0.5
@:Ta=25 C
V
IN
=4.0V
Co=1.0µF(Ceramic)
Io=30mA
C
IN
=0.1µF
0
0.5
1
1.5
2
2.5
3
o
0
Control Voltage : Vcont(V)
-4-
Ver.2007-08-22
NJU7780/81
!
ELECTRICAL CHARACTERISTICS
●AC
CHARACTERISTICS
NJU7780/81_3.0V
Ripple Rejection Ratio vs. Output Current
@:Ta=25 C
V
IN
=4.0V
ein=200mVrms
Co=1.0µF(Ceramic)
C
IN
=0.1µF
o
NJU7780_3.0V
Ripple Rejection Ratio vs. Frequency
100
Io=10mA
Io=0mA
100
90
Ripple Rejection Ratio : RR (dB)
80
70
f=1kHz
60
Ripple Rejection Ratio : RR (dB)
80
60
50
40
40
20
30
f=10kHz
20
0.001
@:Ta=25
o
C
V
IN
=4.0V
ein=200mVrms
C
IN
=0.1µF
Co=1.0µF(Ceramic)
10
100
1000
Io=30mA
10
4
0.01
0.1
1
10
100
0
10
5
10
6
Output Current : Io(mA)
Frequency : f (Hz)
NJU7780/81_3.0V
Output Noise Voltage vs. Output Current
140
NJU7780/81_3.0V
Equivalent Serise Resistance vs. Output Current
100
@:Ta=25
o
C
V
IN
=4.0V
Co=1µF
(Ceramic)
C
IN
=0.1µF
10
120
100
80
Equivalent Serise Resistance : ESR (
Ω )
Output Noise Voltage : Vn(µ Vrms)
µ
1
60
STABLE REGION
40
@:Ta=25 C
V
IN
=4.0V
LPF:80kHz
C
IN
=0.1µF
Co=1.0µF(Ceramic)
0.01
0.1
1
10
100
o
0.1
20
0
0.001
0.02
0.001
0.01
0.1
1
10
100
Output Current : Io(mA)
Output Current : Io(mA)
Ver.2007-08-22
-5-
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