NJRC NJM2855DL1

NJM2855
LOW DROPOUT VOLTAGE REGULATOR
„ GENERAL DESCRIPTION
The NJM2855 is a 3-terminal low dropout voltage regulator.
Advanced Bipolar technology achieves low noise, high ripple
rejection.
It delivers up to 5V/1A output power with the maximum input
voltage of 10V.
The NJM2855 is suitable for various applications such as
portable / consumer devices.
„ PACKAGE OUTLINE
NJM2855DL1
„ FEATURES
z High Ripple Rejection
75dB typ. (f=1kHz,Vo=3V Version)
z Output Noise Voltage
Vno=45µVrms typ.
z Output capacitor with 2.2µF ceramic capacitor (Vo≥2.7V)
z Output Current
Io (max.)=1A
z High Precision Output
Vo±1.0%
z Low Dropout Voltage
0.20V typ. (Io=600mA)
z Internal Short Circuit Current Limit
z Internal Thermal Overload Protection
z Bipolar Technology
z Package Outline
TO-252-3
„ PIN CONFIGURATION
2
1
PIN FUNCTION
1.VIN
2.GND
3.VOUT
3
NJM2855DL1
„ EQUIVALENT CIRCUIT
V IN
V OUT
Thermal
Protection
Bandgap
Reference
GND
Ver.2008-11-12
1
NJM2855
„ OUTPUT VOLTAGE RANK LIST
The WHITE column shows applicable Voltage Rank(s)
2
Device Name
Vout
Device Name
Vout
NJM2855DL1-15
NJM2855DL1-16
NJM2855DL1-17
NJM2855DL1-18
NJM2855DL1-19
NJM2855DL1-02
NJM2855DL1-21
NJM2855DL1-22
NJM2855DL1-23
NJM2855DL1-24
NJM2855DL1-25
NJM2855DL1-26
NJM2855DL1-27
NJM2855DL1-28
NJM2855DL1-29
NJM2855DL1-03
NJM2855DL1-31
NJM2855DL1-32
NJM2855DL1-33
NJM2855DL1-34
1.5V
1.6V
1.7V
1.8V
1.9V
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
NJM2855DL1-35
NJM2855DL1-36
NJM2855DL1-37
NJM2855DL1-38
NJM2855DL1-39
NJM2855DL1-04
NJM2855DL1-41
NJM2855DL1-42
NJM2855DL1-43
NJM2855DL1-44
NJM2855DL1-45
NJM2855DL1-46
NJM2855DL1-47
NJM2855DL1-48
NJM2855DL1-49
NJM2855DL1-05
3.5V
3.6V
3.7V
3.8V
3.9V
4.0V
4.1V
4.2V
4.3V
4.4V
4.5V
4.6V
4.7V
4.8V
4.9V
5.0V
Ver.2008-11-12
NJM2855
„ ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
VIN
Power Dissipation
PD
Operating Temperature
Topr
Storage Temperature
Tstg
(Ta=25°C)
RATINGS
UNIT
+10
V
1190(*1)
mW
-40 ∼ +85
°C
-40 ∼ +150
°C
(*1): Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers, copper area 100mm2)
„ OPERATING VOLTAGE
VIN=+2.5V ~ +8V (In case of Vo<2.3V version)
„ ELECTRICAL CHARACTERISTICS
(VIN=Vo+1V, CIN=0.33µF, Co=2.2µF(1.7V<Vo≤2.6V:4.7µF, Vo≤1.7V:10µF), Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
Output Voltage
Vo
Io=30mA
-1.0%
Input Voltage
VIN
Quiescent Current
IQ
Io=0mA
Output Current
Io
Vo-0.3V
1000
VIN=Vo+1V~Vo+6V(Vo≤2V),
Line Regulation
∆Vo/∆VIN VIN=Vo+1V~8V(Vo>2V),
Io=30mA
Load Regulation
∆Vo/∆Io Io=0 ∼ 1A
Io=600mA
Dropout Voltage(*2)
∆VI−O
ein=200mVrms,f=1kHz, Io=10mA
Ripple Rejection
RR
Vo=3.0V Version
Average Temperature
∆Vo/∆Ta Ta=0∼85°C, Io=10mA
Coefficient of Output Voltage
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
VNO
Vo=3.0V Version(*3)
Input Voltage
VIN
-
TYP. MAX. UNIT
+1.0%
V
8
V
400
600
µA
1300
mA
0.20
0.10
%/V
0.004 %/mA
0.28
V
75
-
dB
±50
-
ppm/°C
45
-
µVrms
-
8
V
(*2): The output voltage excludes under 2.1V.
(*3): Vo>2.0V : VIN=Vo+1V, Vo≤2.0V : VIN=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.
Ver.2008-11-12
3
NJM2855
„ POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2855DL1 PowerDissipation
(Topr=-40~+85°C,Tj=150°C)
Power Dissipation PD(mW)
3500
3000
on 4 layers board
2500
2000
1500
on 2 layers board
1000
500
0
-50
-25
0
25
50
75
100
Temperature : Ta(°C)
„ TEST CIRCUIT
A
IIN
VIN
VIN
0.33µF
VOUT
NJM2855
2.2µF *4
IOUT V VOU
(ceramic)
GND
*4
1.7V<Vo≤2.6V version: Co=4.7µF(ceramic)
Vo≤1.7V version: Co=10µF(ceramic)
„ TYPICAL APPLICATION
VIN
VIN
0.33µF
VOUT
NJM2855
VOUT
2.2µF *5
GND
*5
4
1.7V<Vo≤2.6V version: Co=4.7µF
Vo≤1.7V version: Co=10µF
Ver.2008-11-12
NJM2855
¿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 0.33µF greater to avoid the problem.
CIN should connect between GND and VIN as short as possible.
¿Output Capacitance Co
Output capacitor (Co) is required for a phase compensation of the internal error amplifier. The
capacitance and the equivalent series resistance (ESR) influence stability of the regulator.
If use a smaller Co, it may cause excess output noise or oscillation of the regulator due to lack of the
phase compensation. Therefore, use Co with the recommended capacitance or greater value and
connect between Vo terminal and GND terminal with minimal wiring.
The recommended capacitance depends on the output voltage. Low voltage regulator requires greater
value of the Co. Thus, check the recommended capacitance for each output voltage.
Use of a greater Co reduces output noise and ripple output, and also improves transient response of
the output voltage against rapid load change.
This product is designed to work with any capacitor including a low ESR capacitor for the Co; however,
refer "Equivalent Series Resistance vs. Output Current" and choose suitable capacitor.
„ TYPICAL CHARACTERISTICS
Ver.2008-11-12
5
NJM2855
NJM2855_3.0V
Output Voltage vs. Input Voltage
3.3
NJM2855_3.0V
Output Voltage vs. Output Current
4
@:Ta=25oC
Co=2.2µF(Ceramic)
3.5
3.2
Output Voltage : Vo(V)
Output Voltage : Vo(V)
3
3.1
Io=100mA
3
Io=0A
2.9
2.5
2
1.5
1
2.8
@:Ta=25oC
V IN=4V
Co=2.2µF(Ceramic)
0.5
Io=1A
Io=500mA
2.7
0
2.7
2.8
2.9
3
3.1
3.2
3.3
0
500
NJM2855_3.0V
Ground Pin Current vs. Output Current
35
1500
2000
NJM2855_3.0V
Dropout Voltage vs. Output Current
0.4
@:Ta=25oC
Co=2.2µF (Ceramic)
0.35
30
0.3
25
Dropout Voltage:dVI-O (V)
Ground Pin Current : IGND (mA)
1000
Output Current : Io(mA)
Input Voltage : V IN(V)
20
15
10
5
@:Ta=25oC
V IN=4.0V
Co=2.2µF(Ceramic)
0.25
0.2
0.15
0.1
0.05
0
0
0
200
400
600
800
1000
0
1200
200
400
NJM2855_3.0V
Load Regulation vs. Output Current
0
600
800
1000
1200
1400
Output Current:Io(mA)
Output Current : IO(mA)
NJM2855_3.0V
Peak Output Current vs. Input Voltage
2500
2000
Peak Output Current : Io MAX(mA)
Load Regulation : dVo/dIo(mV)
-10
-20
-30
-40
-50
-60
1500
1000
500
o
-70
@:Ta=25 C
VIN=4.0V
Co=2.2µF(Ceramic)
@:Ta=25oC
Co=2.2µF(Ceramic)
0
-80
0
200
400
600
800
1000
Output Current : Io(mA)
1200
1400
4
5
6
7
8
Input Voltage : V IN(V)
„ TYPICAL CHARACTERISTICS
6
Ver.2008-11-12
NJM2855
NJM2855_3.0V
Quiescent Current vs. Input Voltage
6000
100
@:Ta=25oC
Output is open.
Co=2.2µF(Ceramic)
Output Noise Voltage : Vn(uVrms)
5000
Quiescent Current : I Q (uA)
NJM2855_3.0V
Output Noise Voltage vs. Output Current
4000
3000
2000
1000
1
2
3
4
5
6
7
80
60
40
20
0
0.001
0
0
@:Ta=25oC
VIN=4.0V
LPF:80kHz
Co=2.2µF(ceramic)
8
0.01
Input Voltage : V IN(V)
NJM2855_3.0V
Ripple Rejection Ratio vs. Frequency
Ripple Rejection Ratio : RR (dB)
Io=0mA
70
60
Io=30mA
Io=100mA
40
@: Ta=25oC
VIN=4V
ein=200mVrms
Co=2.2µF(Ceramic)
30
100
70
60
1k
Frequency : f (Hz)
10k
100
f=10kHz
50
40
@:Ta=25oC
VIN=4V
ein=200mVrms
Co=2.2µF(Ceramic)
20
0.001
0.01
0.1
1
10
100
1000
Output Current : Io(mA)
NJM2855_3.0V
Equivalent Serise Resistance vs. Output Current
100
Equivalent Serise Resistance : ESR( Ω)
1000
80
30
20
10
100
f=1kHz
80
50
10
90
Io=10mA
90
1
NJM2855_3.0V
Ripple Rejection vs. Output Current
100
Ripple Rejection : RR (dB)
100
0.1
Output Current : Io(mA)
10
VIN=4V
1
STABLE REGION
0.1
@:Ta=25oC
Co=2.2µF(Ceramic)
VIN=4V
0.02
0.001
0.01
0.1
1
10
100
103
Output Current : Io(mA)
„ TYPICAL CHARACTERISTICS
Ver.2008-11-12
7
NJM2855
NJM2855_3.0V
Dropout Voltage vs. Temperature
0.4
Io=600mA
Co=2.2µF(Ceramic)
0.35
3.05
Output Voltage : Vo(V)
0.3
Dropout Voltage:dVI-O (V)
NJM2855_3.0V
Output Voltage vs. Temperature
3.1
0.25
0.2
0.15
0.1
3
2.95
0.05
0
@:VIN=4.0V
Io=30mA
Co=2.2µF(Ceramic)
2.9
-50
0
50
100
150
-50
0
50
o
NJM2855_3.0V
Quiescent Current v.s. Input Voltage
600
@:VIN=4.0V
Output is open.
Co=2.2µF(Ceramic)
@:VIN=4.0V
Co=2.2µF (Ceramic)
Output is short to ground.
800
Short Circuit Current : Isc (mA)
Quiescent Current : I Q (uA)
150
NJM2855_3.0V
Short Circuit Current v.s. Temperature
1000
500
100
Temperature : Ta ( oC)
Temperature : Ta ( C)
400
300
200
100
600
400
200
0
0
-50
0
50
100
-50
150
0
50
o
NJM2855_3.0V
Line Regulation vs. Temperature
0.1
100
150
Temperature : Ta ( oC)
Temperature : Ta ( C)
0.03
NJM2855_3.0V
Load Regulation vs. Temperature
@:VIN=4.0V
Io=0-1000mA
Co=2.2µF(Ceramic)
Load Regulation : dVo/dIo(%/mA)
Line Regulation : dVo/dIo(%/V)
0.025
0.05
0
-0.05
-0.1
@:VIN=4.0-8.0V
Io=30mA
Co=2.2µF(Ceramic)
-50
0
50
o
Temperature : Ta ( C)
100
150
0.02
0.015
0.01
0.005
0
-50
0
50
o
100
150
Temperature : Ta ( C)
„ TYPICAL CHARACTERISTICS
8
Ver.2008-11-12
NJM2855
NJM2855_3.0V
Output Voltage vs. Temperature
4
3.5
Output Voltage : Vo(V)
3
2.5
2
1.5
1
0.5
@:VIN=4.0V
Io=30mA
Co=2.2µF(Ceramic)
0
-50
0
50
100
150
200
Temperature : Ta ( oC)
NJM2855_3V
Line Transient Response
NJM2855_3V
Load Transient Response
6
3.1
Output Current
5
3.08
1100
3.25
3.2
1000
3.15
900
3.1
800
3.04
3
2
3.02
Output Voltage
1
3
0
2.98
@:Ta=25o C
V IN=4V
Co=2.2µF
Io=30mA
2.96
40
Output Voltage
600
3
500
2.95
o
2.94
0
700
3.05
Output Current : Io [mA]
4
Output Voltage : Vo [V]
3.06
Input Voltage : VIN [V]
Output Voltage : Vo [V]
Input Voltage
80
120
Time : t [µs]
160
-1
2.9
-2
200
2.85
@:Ta=25 C
VIN=4V
Co=2.2µF
0
40
80
120
Time : t [µs]
160
400
300
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.2008-11-12
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