NJRC NJU7790

NJU7790
LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
The NJU7790 is a 500mA output low dropout voltage
regulator with ON/OFF control.
Advanced CMOS technology achieves high ripple rejection
and low quiescent current.
Small packaging and 2.2µF small decoupling capacitor make the
NJU7790 suitable for space conscious applications.
PACKAGE OUTLINE
NJU7790U1
FEATURES
High Ripple Rejection
65dB typ. (f=400Hz, Vo=3.0V Version)
Low quiescent Current
Iq=30µA typ.(Io=0mA)
Output Current
Io(max.)=500mA
High Precision Output
Vo±1.0%
Output capacitor with 2.2µF ceramic capacitor (Vo≥2.1V version)
Low Dropout Voltage
0.14V typ. (Io=300mA, Vo=3.0V Version)
ON/OFF Control
Internal Thermal Overload Protection
Internal Over Current Protection
CMOS Technology
Package Outline
SOT-89-5
PIN CONFIGURATION
5
2
4
1
2
3
1. CONTROL
2. GND
3. N.C.
4. VOUT
5. VIN
NJU7790U1
EQUIVALENT CIRCUIT
VIN
V OUT
Thermal
Protection
CONTROL
Output
Control
Vref
Current
Limit
GND
Ver.2007-07-19
-1-
NJU7790
OUTPUT VOLTAGE RANK LIST
Device Name
VOUT
NJU7790U1-15
1.5V
NJU7790U1-21
2.1V
NJU7790U1-03
3.0V
NJU7790U1-33
3.3V
NJU7790U1-05
5.0V
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
VIN
Control Voltage
VCONT
Power Dissipation
PD
Operating Temperature
Topr
Storage Temperature
Tstg
(Ta=25°C)
RATINGS
UNIT
+9
V
+9(*1)
V
350(*2)
mW
-40∼+85
°C
-40∼+125
°C
(*1) : When input voltage is less than +10V, the absolute maximum control voltage is equal to the input voltage.
(*2) : Device itself.
Operating voltage
VIN=+2.3 ∼ +8V (In case of Vo<2.1V version)
ELECTRICAL CHARACTERISTICS (VIN=Vo+1V, CIN=1.0µF, Co=2.2µF(Co=4.7µF: Vo≤2.0V), Ta=25°C)
PARAMETER
Output Voltage
Input Voltage
Quiescent Current
Quiescent Current
at Control OFF
SYMBOL
Line Regulation
∆Vo/∆VIN
Load Regulation
∆Vo/∆Io
Pull-down Resistance
Control Voltage for ON-state
Control Voltage for OFF-state
UNIT
-1.0%
–
–
–
–
30
+1.0%
8
60
V
V
µA
–
0.1
1.0
µA
500
–
–
mA
–
180
–
mA
–
–
0.15
%/V
–
–
–
–
–
–
0.17
0.15
0.14
0.12
0.005
0.22
0.19
0.18
0.16
%/mA
V
V
V
V
–
65
–
dB
Ta=0 ∼ +85°C, Io=10mA
–
±100
–
ppm/°C
f=10Hz ∼ 80kHz, Io=10mA,
Vo=3VVersion
–
75
–
µVrms
2
1.6
–
5
–
–
10
–
0.3
MΩ
V
V
VCONT=0V
ILIM
Output Noise Voltage
MAX.
IQ(OFF)
Short Current Limit
Average Temperature
Coefficient of Output Voltage
TYP.
Io=30mA
Io
Ripple Rejection
MIN.
Vo
VIN
IQ
Output Current
Dropout Voltage(*3)
TEST CONDITION
∆VI-O
RR
∆Vo/∆Ta
VNO
Io=0mA, VCONT=VIN, Include ICONT
Vo - 0.1V(Vo≤2.0V Version)
Vo - 0.3V(Vo≥2.1V Version)
Vo=0V
VIN=Vo+1V ∼ Vo+6.0V (Vo<2V Version)
VIN=Vo+1V ∼ 8.0V (Vo≥2V Version),
Io=30mA
Io=0 ∼ 500mA
2.1V≤Vo<2.5V
2.5V≤Vo<2.9V
Io=300mA
2.9V≤Vo<3.5V
3.5V≤Vo≤5.0V
ein=200mVrms,f=400Hz,Io=10mA,
Vo=3V Version
RCONT
VCONT(ON)
VCONT(OFF)
(*3): Except output voltage less than 2.1V.
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.2007-07-19
NJU7790
TEST CIRCUIT
A
IIN
VIN
VIN
NJU7790
1.0µF
A
ICONT
VOUT
IOUT V VOUT
CONTROL
GND
V VCONT
*4
*4
2.2µF
(ceramic)
Vo≤2.0V version: Co=4.7µF(ceramic)
TYPICAL APPLICATION
1 In case that ON/OFF Control is not required:
VIN
VIN
1.0µF
VOUT
NJU7790
VOUT
2.2µF *5
CONTROL
GND
*5: Vo≤2.0V version: Co=4.7µF
Connect control terminal to VIN terminal.
Ver.2007-07-19
-3-
NJU7790
2 In use of ON/OFF Control
VIN
VIN
1.0µF
VOUT
NJU7790
VOUT
2.2µF *5
CONTROL
GND
*5: Vo≤2.0V version: Co=4.7µF
State of control terminal:
● “H” → output is enabled.
● “L” or “open” → output is disabled.
Input Capacitance CIN
Input Capacitance CIN is required to prevent oscillation and reduce power supply ripple for applications with high
power supply impedance or a long power supply line.
Use the CIN value of 1.0µF greater to avoid the problem.
CIN should connect between GND and VIN as short as possible.
-4-
Ver.2007-07-19
NJU7790
TYPICAL CHARACTERISTICS
●DC CHARACTERISTICS
NJU7790_3.0V
Output Voltage vs. Input Voltage
3.2
NJU7790_3.0V
Output Voltage vs. Output Current
3.5
o
@:Ta=25 C
Co=2.2µF(Ceramic)
CIN=1.0µF
3.1
3
Output Voltage : Vo(V)
Output Voltage : Vo(V)
2.5
Io=0A
3
2.9
Io=30mA
2.8
2
1.5
1
o
Io=100mA
@:Ta=25 C
VIN=4.0V
Co=2.2µF(Ceramic)
CIN=1.0µF
0.5
2.7
2.7
2.8
2.9
3
3.1
3.2
3.3
0
3.4
0
200
400
Input Voltage : VIN(V)
600
800
1000
1200
Output Current : Io(mA)
NJU7790_3.0V
Ground Pin Current v.s. Output Current
NJU7790_3.0V
Dropout Voltage vs. Output Current
1
200
Dropout Voltage:dVI-O (V)
Ground Pin Current : IGND (uA)
0.8
150
100
50
0.6
0.4
0.2
o
@:Ta=25 C
VIN=4.0V
Co=2.2µF(Ceramic)
CIN=1.0µF
o
@:Ta=25 C
Co=2.2µF(Ceramic)
CIN=1.0µF
0
0
0
100
200
300
400
500
600
700
0
800
100
200
NJU7790_3.0V
Output Voltage vs. Control Voltage
3.5
300
400
500
600
700
800
Output Current:Io(mA)
Output Current : IO(mA)
NJU7790_3.0V
Load Regulation vs. Output Current
0
Load Regulation : dVo-lo(mV)
3
Output Voltage : Vo(V)
2.5
2
1.5
1
o
@:Ta=25 C
VIN=4.0V
Co=2.2µF(Ceramic)
Io=30mA
C IN=1.0µF
0.5
-10
-15
o
@:Ta=25 C
VIN=4.0V
Co=2.2µF(Ceramic)
C IN=1.0µF
0
-20
0
0.5
1
1.5
2
2.5
Control Voltage : Vcont(V)
Ver.2007-07-19
-5
3
3.5
0
200
400
600
800
Output Current : lo(mA)
-5-
NJU7790
TYPICAL CHARACTERISTICS
●DC CHARACTERISTICS
NJU7790_3.0V
Output Current vs. Input Voltage
1200
1000
40
µ A)
Quiescent Current : Iq(µ
Output Current : lo(mA)
NJU7790_3.0V
Quiescent Current vs. Input Voltage
50
800
600
400
30
20
o
@:Ta=25 C
Output is open
Co=2.2µF(Ceramic)
including I CONT
C IN=1.0µF
10
200
o
@:Ta=25 C
Co=2.2µF(Ceramic)
CIN=1.0µF
0
0
3
4
5
6
7
0
8
2
Input Voltage : VIN(V)
4
6
8
10
Input Voltage : VIN(V)
●AC CHARACTERISTICS
NJU7790_3.0V
Output Noise Voltage vs. Output Current
NJU7790_3.0V
Ripple Rejection Ratio vs. Frequency
100
80
Ripple Rejection Ratio : RR (dB)
Output Noise Voltage : Vn(µ
µ Vrms)
200
150
100
50
o
@:Ta=25 C
VIN=4.0V
LPF:80kHz
C IN=1.0µF
Co=2.2µF(Ceramic)
0
0.001
0.01
0.1
1
10
100
lo=0A
60
lo=10mA
40
20
@:Ta=25oC
VIN=4.0V
ein=200mVrms
CIN=1.0µF
Co=2.2µF(Ceramic )
0
0.01
1000
0.1
40
f=10kHz
20
0.1
1
10
Output Current : Io(mA)
Ver.2007-07-19
Equivalent Serise Resistance : ESR(Ω )
Ripple Rejection Ratio : RR (dB)
60
0.01
1000
o
f=1kHz
0.001
100
100
o
@:Ta=25 C
VIN=4.0V
ein=200mVrms
Co=2.2µF(Ceramic )
CIN=1.0µF
0
10
NJU7790_3.0V
Equivalent Serise Resistance vs. Output Current
NJU7790_3.0V
Ripple Rejection Ratio vs. Output Current
80
1
Frequency(kHz)
Output Current : Io(mA)
100
lo=30mA
100
1000
@:Ta=25 C
VIN=4.0V
Co=2.2µF(Ceramic)
C IN=1.0µF
10
1
STABLE REGION
0.1
0.02
0.001
0.01
0.1
1
10
100
1000
Output Current : Io(mA)
-6-
NJU7790
TYPICAL CHARACTERISTICS
●TEMPERATURE CHARACTERISTICS
NJU7790_3.0V
Output Voltage v.s. Temperature
NJU7790_3.0V
Output Voltage v.s. Temperature
3.1
4
3.5
Output Voltage : (V)
Output Voltage: (V)
3.05
3
2.95
3
2.5
2
1.5
1
@:VIN=4.0V
lo=30mA
Co=2.2µF(Ceramic)
CIN=1.0µF
2.9
-50
0
50
100
@:VIN=4.0V
Io=30mA
Co=2.2µF(Ceramic)
C IN=1.0µF
0.5
0
150
-50
o
0
50
100
150
200
o
Temperature : Ta ( C)
Temperature : Ta ( C)
NJU7790_3.0V
Line Regulation v.s. Temperature
0.1
NJU7790_3.0V
Load Regulation v.s. Temperature
0.005
0.004
Load Regulation(%/mA)
Line Regulation(%/V)
0.05
0
-0.05
0.003
0.002
0.001
@:VIN=4.0-8.0V
lo=30mA
Co=2.2µF(Ceramic)
C IN=1.0µF
-0.1
@:VIN=4.0V
Io=0-500mA
Co=2.2µF(Ceramic)
CIN=1.0µF
0
-50
0
50
100
150
-50
o
0
50
100
150
o
Temperature : Ta ( C)
Temperature Ta ( C)
NJU7790_3.0V
Dropout Voltage v.s. Temperature
0.35
NJU7790_3.0V
Pull Down Resistance v.s. Temperature
10
0.3
8
Pull Down Resistance(M Ω)
Dropout Voltage(V)
0.25
0.2
0.15
0.1
0
@:VIN=6.0V
I CONT=5mA
Co=2.2µF(Ceramic)
CIN=1.0µF
0
-50
0
50
100
o
Temperature : Ta ( C)
Ver.2007-07-19
4
2
@:VIN=4.0
Io=300mA
Co=2.2µF(Ceramic)
C IN=1.0µF
0.05
6
150
-50
0
50
100
150
o
Temperature Ta ( C)
-7-
NJU7790
TYPICAL CHARACTERISTICS
●TEMPERATURE CHARACTERISTICS
2
2
1.5
1.5
Control OFF Voltage Vo (V)
Control ON Voltage(V)
NJU7790_3.0V
Control ON Voltage vs Temperature
1
0.5
NJU7790_3.0V
Control OFF Voltage vs Temperature
1
0.5
@:VIN=4.0V
Output is open
Co=2.2µF(Ceramic)
C IN=1.0µF
@:VIN=4.0V
Output is open
Co=2.2µF(Ceramic)
CIN=1.0µF
0
0
-50
0
50
100
o
Temperature : Ta ( C)
Ver.2007-07-19
150
-50
0
50
100
150
o
Temperature Ta ( C)
-8-
NJU7790
TYPICAL CHARACTERISTICS
●TRANSIENT RESPONSE
NJU7790_3.0V
ON/OFF Transient Response
NJU7790_3.0V
ON/OFF Transient Response
7
10
7
6
5
6
10
5
4
-5
3
-10
-15
2
0
Output Voltage
0
1
4
-10
2
-15
1
L
-1
5
0
100
200
300
Time : t [ms]
NJU7790_3.0V
Line Transient Response
3.4
6
3.4
5
3.3
500
3.2
3
3.1
2
3
1
Output Voltage
2.9
@:Ta=25 C
VIN=4.0-5.0V
Co=2.2 µF(Ceramic)
Io=30mA
2.7
80
120
Time : t [µ
µ s]
160
200
3
Output Voltage
100
2.9
0
2.8
-1
2.7
-2
200
300
3.1
0
o
400
3.2
Output Voltage : Vo [V]
4
Input Voltage : VIN [V]
Output Voltage : Vo [V]
Output Current
3.3
40
-30
500
600
Input Voltage
0
400
-25
NJU7790_3.0V
Load Transient Response
3.5
2.8
-20
o
@:Ta=25 C
V IN=4.0V
Co=2.2mF(Ceramic)
R =100 Ω
0
-30
2
3
Time : t [ms]
-5
Output Voltage
-25
L
-1
4
3
-20
o
@:Ta=25 C
VIN=4.0V
Co=2.2mF(Ceramic)
R =100Ω
0
2.6
0
Output Current : Io [mA]
1
5
Control Voltage : Vo [V]
0
Control Voltage
Output Voltage : Vo [V]
Output Voltage : Vo [V]
5
Control Voltage : Vo [V]
Control Voltage
o
@:Ta=25 C
V IN=4.0V
Co=2.2 µF(Ceramic)
Io=400-500mA
40
80
120
Time : t [µ s]
160
-100
-200
200
[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.
Ver.2007-07-19
-9-