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 cellular phone and other portable items.
When the ON/OFF control is used, NJU7781 has high transition
response characteristics for shunt switch.
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 Short Circuit Current Limit
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.2004-12-22
-1-
NJU7780/81
OUTPUT VOLTAGE RANK LIST (1.5V~5.0V : 0.1V step)
Device Name
V
OUT
NJU778xU1-21
2.1V
NJU778xU1-25
2.5V
NJU778xU1-03
3.0V
NJU778xU1-33
3.3V
NJU778xU1-05
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.
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
Ripple Rejection
Average Temperature
Coefficient of Output Voltage
Output Noise Voltage
Pull-Down Resistance
Control Voltage for ON-state
Control Voltage for OFF-state
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)
Io=0mA, V
CONT
=V
IN
V
CONT
=0V
Vo-0.3V
Vo=0V
V
IN
=Vo+1V∼Vo+6V(3.0>Vo),
V
IN
=Vo+1V∼Vo+9V(3.0≤Vo), Io=30mA
Io=0∼300mA
2.1
≤
V
O
≤
2.6V
I
O
=150mA
2.7
≤
V
O
≤
3.3V
3.4
≤
V
O
≤
5.0V
TEST CONDITION
Io=30mA
MIN.
-1.0%
-
-
-
300
-
-
-
-
-
-
-
-
-
1.5
1.6
-
TYP.
-
-
20
-
-
120
-
-
0.18
0.15
0.12
65
±100
80
5
-
-
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
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
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.2004-12-22
NJU7780/81
TEST CIRCUIT
I
IN
V
IN
C
IN
0.1µF
V
OUT
C
0
1.0µF
(ceramic)
I
OUT
A
V
IN
V
V
OUT
NJU778*
A
V
V
CONT
I
CONT
CONTROL
GND
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
V
OUT
NJU778*
CONTROL
GND
Connect control terminal to V
IN
terminal
2
In use of ON/OFF CONTROL:
V
IN
V
OUT
C
0
0.1µF
V
IN
C
IN
0.1µF
V
OUT
NJU778*
CONTROL
GND
State of control terminal:
•“H”→
output is enabled.
•“L”
or “open”
→
output is disabled.
Ver.2004-12-22
-3-
NJU7780/81
ELECTRICAL CHARACTERISTICS
3.2
NJU7780/81_3.0V
Output Voltage vs. Input Voltage
@:Ta=25 C
Co=1.0µF
(Ceramic)
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
2.8
Io=100mA
0.5
@:Ta=25 C
VIN=4.0V
Co=1.0µF
(Ceramic)
0
100
200
300
400
500
600
700
o
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 v.s. Output Current
70
@:Ta=25 C
VIN=4.0V
Co=1.0µF
(Ceramic)
0.4
o
0.5
o
NJU7780/81_3.0V
Dropout Voltage vs. Output Current
@:Ta=25 C
Co=1.0µF
(Ceramic)
60
Ground Pin Current : I
GND
(uA)
Dropout Voltage:dV
I-O
(V)
50
40
0.3
30
0.2
20
0.1
10
0
0
50
100
150
200
250
300
350
400
0
0
50
100
150
200
250
300
350
400
Output Current : I
O
(mA)
Output Current:Io(mA)
4
NJU7780/81_3.0V
Output Voltage vs. Control Voltage
NJU7780/81_3.0V
Output Noise Voltage vs. Output Current
140
3.5
120
3
Output Noise Voltage : Vn(µ Vrms)
µ
100
Output Voltage : Vo(V)
2.5
80
2
60
1.5
1
@:Ta=25 C
VIN=4.0V
Co=1.0µF
(Ceramic)
Io=30mA
0
0.5
1
1.5
2
2.5
3
o
40
@:Ta=25 C
VIN=4.0V
LPF:80kHz
Cin=0.1µF
Co=1.0µF(Ceramic)
0.01
0.1
1
10
100
o
0.5
20
0
0
0.001
Control Voltage : Vcont(V)
Output Current : Io(mA)
-4-
Ver.2004-12-22
NJU7780/81
ELECTRICAL CHARACTERISTICS
100
NJU7780/81_3.0V
Ripple Rejection vs. Output Current
@:Ta=25 C
VIN=4.0V
ein=200mVrms
Co=1.0µF
(Ceramic)
o
NJU7780/81_3.0V
Equivalent Serise Resistance vs. Output Current
100
@:Ta=25 C
VIN=4.0V
Co=1µF
(Ceramic)
Cin=0.1
µF
10
o
90
80
70
f=1kHz
60
Equivalent Serise Resistance : ESR(Ω )
Ω
Ripple Rejection : RR (dB)
1
50
STABLE REGION
40
0.1
30
f=10kHz
20
0.001
0.02
0.01
0.1
1
10
100
1µ
10µ
100µ
1m
10m
100m
700m
Output Current : Io(mA)
Output Current : Io(A)
0.3
NJU7780/81_3.0V
Dropout Voltage v.s. Temperature
@:Io=150mA
Co=1.0µF
(Ceramic)
Cin=0.1µF
NJU7780/81_3.0V
Control Voltage v.s. Temperature
2
Control Voltage : V
CONT(ON)
(V)
0.25
1.5
Dropout Voltage:dV
I-O
(V)
0.2
0.15
1
0.1
0.5
0.05
@:V
IN
=4.0V
Io=30mA
Co=1.0µF(Ceramic)
Cin=0.1µF
-50
0
50
100
o
0
150
0
-50
0
50
100
o
150
Temperature : Ta ( C)
Temperature : Ta ( C)
NJU7780/81_3.0V
Quiescent Current v.s. Temperature
30
4
NJU7780/81_3.0V
Output Voltage v.s. Temperature
@:V
IN
=4.0V
Io=30mA
Co=1.0µF
(Ceramic)
Cin=0.1µF
25
3.5
3
Quiescent Current : I
Q
(
µ
A)
Output Voltage Vo (V)
@:V
IN
=4.0V
Output is open.
Co=1.0µF(Ceramic)
Cin=0.1µF
-50
0
50
100
o
20
2.5
15
2
1.5
10
1
5
0.5
0
150
0
-50
0
50
100
o
150
200
Temperature : Ta ( C)
Temperature Ta ( C)
Ver.2004-12-22
-5-
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