NJRC NJM2856

NJM2856
LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
The NJM2856 is a low dropout voltage regulator with
ON/OFF control.
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 NJM2856 is suitable for various applications such as
portable / consumer equipments.
PACKAGE OUTLINE
NJM2856DL3
FEATURES
High Ripple Rejection
75dB typ. (f=1kHz,Vo=3V Version)
Output Noise Voltage
Vno=45µVrms typ.
Output capacitor with 2.2µF ceramic capacitor (Vo≥2.7V)
Output Current
Io(max.)=1A
High Precision Output
Vo±1.0%
Low Dropout Voltage
0.20V typ. (Io=600mA)
ON/OFF Control
Internal Short Circuit Current Limit
Internal Thermal Overload Protection
Bipolar Technology
Package Outline
TO-252-5
PIN CONFIGURATION
3
1.CONTROL
2.VIN
3.GND
4.Vo
5.NC
123 45
NJM2856DL3
EQUIVALENT CIRCUIT
VIN
VOUT
Control
Thermal
Protection
Bandgap
Reference
GND
Ver.2008-11-12
1
NJM2856
OUTPUT VOLTAGE RANK LIST
The WHITE column shows applicable Voltage Rank(s)
2
Device Name
Vout
Device Name
Vout
NJM2856DL3-15
NJM2856DL3-16
NJM2856DL3-17
NJM2856DL3-18
NJM2856DL3-19
NJM2856DL3-02
NJM2856DL3-21
NJM2856DL3-22
NJM2856DL3-23
NJM2856DL3-24
NJM2856DL3-25
NJM2856DL3-26
NJM2856DL3-27
NJM2856DL3-28
NJM2856DL3-29
NJM2856DL3-03
NJM2856DL3-31
NJM2856DL3-32
NJM2856DL3-33
NJM2856DL3-34
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
NJM2856DL3-35
NJM2856DL3-36
NJM2856DL3-37
NJM2856DL3-38
NJM2856DL3-39
NJM2856DL3-04
NJM2856DL3-41
NJM2856DL3-42
NJM2856DL3-43
NJM2856DL3-44
NJM2856DL3-45
NJM2856DL3-46
NJM2856DL3-47
NJM2856DL3-48
NJM2856DL3-49
NJM2856DL3-05
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
NJM2856
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
VIN
Control Voltae
VCONT
Power Dissipation
PD
Operating Temperature
Topr
Storage Temperature
Tstg
(Ta=25°C)
RATINGS
UNIT
+10
V
+10
V
1190(*1)
mW
-40 ∼ +85
°C
-40 ∼ +150
°C
(*1): Mounted on glass epoxy board. (114.3x76.2x1.6mm: 2Layers, FR-4, 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. TYP. MAX. UNIT
Output Voltage
Vo
Io=30mA
-1.0%
+1.0%
V
Input Voltage
VIN
8
V
Quiescent Current
IQ
Io=0mA
400
600
µA
Quiescent Current
VCONT=0V
100
nA
IQ(OFF)
−
−
at Control OFF
Output Current
Io
Vo-0.3V
1000 1300
mA
VIN=Vo+1V~Vo+6V(Vo≤2V),
Line Regulation
0.10
%/V
∆Vo/∆VIN VIN=Vo+1V~8V(Vo>2V),
Io=30mA
Load Regulation
0.004 %/mA
∆Vo/∆Io Io=0 ∼ 1A
Io=600mA
0.20 0.28
V
Dropout Voltage(*2)
∆VI−O
ein=200mVrms,f=1kHz, Io=10mA
Ripple Rejection
RR
75
dB
Vo=3.0V Version
Average Temperature
∆Vo/∆Ta Ta=0∼85°C, Io=10mA
±50
ppm/°C
Coefficient of Output Voltage
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
VNO
45
µVrms
Vo=3.0V Version(*3)
Control Current
ICONT
VCONT=1.6V, Io=0mA
3
12
µA
Control Voltage for ON-state VCONT(ON)
1.6
V
Control Voltage for OFF-state VCONT(OFF)
0.6
V
Input Voltage
VIN
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
NJM2856
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2856DL3 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
A
V VCONT
*4
4
ICONT
VOUT
NJM2856
2.2µF *4
IOUT
V VOU
(ceramic)
CONTROL
GND
1.7V<Vo≤2.6V version: Co=4.7µF(ceramic)
Vo≤1.7V version: Co=10µF(ceramic)
Ver.2008-11-12
NJM2856
TYPICAL APPLICATION
1 In the case where ON/OFF Control is not required:
VIN
VIN
0.33µF
VOUT
NJM2856
VOUT
2.2µF *5
R
CONTROL
GND
*5
1.7V<Vo≤2.6V version: Co=4.7µF
Vo≤1.7V version: 10µF
Connect control terminal to VIN terminal
2 In use of ON/OFF CONTROL:
VIN
VIN
VOUT
NJM2856
0.33µF
VOUT
2.2µF *5
R
CONTROL
GND
*5 1.7V<Vo≤2.6V version: Co=4.7µF
Vo≤1.7V version: 10µF
State of control terminal:
•“H”→ output is enabled.
•“L” or “open” → output is disabled.
In the case of using a resistance "R" between VIN and control.
The current flow into the control terminal while the IC is ON state (ICONT) can be reduced when a pull up
resistance "R" is inserted between VIN and the control terminal.
The minimum control voltage for ON state (VCONT (ON)) is increased due to the voltage drop caused by
ICONT and the resistance "R".
Ver.2008-11-12
5
NJM2856
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.
6
Ver.2008-11-12
NJM2856
TYPICAL CHARACTERISTICS
NJM2856_3.0V
Output Voltage vs. Input Voltage
3.3
NJM2856_3.0V
Output Voltage vs. Output Current
4
o
@:Ta=25 C
CNT=4.0V
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
3.2
3.5
Output Voltage : Vo(V)
Output Voltage : Vo(V)
3
3.1
Io=0A
3
2.9
2.5
2
1.5
1
o
@:Ta=25 C
VIN=CNT=4.0V
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
2.8
Io=500mA
Io=1000mA
0.5
Io=100mA
2.7
2.7
2.8
2.9
3
3.1
3.2
0
3.3
0
500
1000
Input Voltage : VIN(V)
NJM2856_3.0V
Ground Pin Current vs. Output Current
35
2000
2500
NJM2856_3.0V
Dropout Voltage vs. Output Current
0.4
o
@:Ta=25 C
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
o
@:Ta=25 C
VIN=4.0V
CNT=4.0V
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
30
0.35
0.3
25
Dropout Voltage:dVI-O (V)
Ground Pin Current : I GND(mA)
1500
Output Current : Io(mA)
20
15
10
5
0.25
0.2
0.15
0.1
0.05
0
0
0
200
400
600
800
1000
1200
0
200
400
NJM2856_3.0V
Control Current vs. Control Voltage
20
600
800
1000
1200
1400
Output Current:Io(mA)
Output Current : Io(mA)
NJM2856_3.0V
Output Voltage vs. Control Voltage
4
o
@:Ta=25 C
VIN=4.0V
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
Io=30mA
Rc=0Ω
3
Output Voltage : Vo(V)
Control Current : Icont(uA)
15
3.5
Rc=0Ω
10
Rc=50kΩ
Rc=100kΩ
5
Rc=50kΩ
2.5
2
Rc=100kΩ
1.5
1
o
@:Ta=25 C
VIN=4.0V
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
Io=30mA
0.5
0
0
0
0.5
1
1.5
2
2.5
Control Voltage : Vcont(V)
Ver.2008-11-12
3
3.5
4
0
0.5
1
1.5
2
2.5
3
Control Voltage : Vcont(V)
7
NJM2856
TYPICAL CHARACTERISTICS
NJM2856_3.0V
Load Regulation vs. Output Current
0
NJM2856_3.0V
Peak Output Current vs. Input Voltage
2500
-10
Peak Output Current : Io MAX(mA)
Load Regulation : dVo/dIo(mV)
2000
-20
-30
1500
-40
1000
-50
-60
o
@:Ta=25 C
Vin=4.0V
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
-70
o
500
-80
0
200
400
600
800
1000
1200
@:Ta=25 C
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
IntegrationTime:1ms
MeasureDelay:1ms
PulseWidth:5ms
0
1400
4
4.5
5
NJM2856_3.0V
Quiescent Current v.s. Input Voltage
6000
5.5
6
6.5
7
7.5
8
Input Voltage : VIN(V)
Output Current : Io(mA)
NJM2856(1A)_mold_3.0V
Output Noise Voltage vs. Output Current
100
o
@:Ta=25 C
Output is open.
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
Output Noise Voltage : Vn(uVrms)
Quiescent Current : I Q (uA)
5000
o
4000
3000
2000
1000
2
4
6
8
80
60
40
20
0
0.001
0
0
@:Ta=25 C
VIN=4.0V
LPF:80kHz
Co=2.2uF(ceramic)
10
0.01
Input Voltage : VIN(V)
NJM2856(1A)_mold_3.0V
Ripple Rejection Ratio vs. Frequency
100
Io=0mA
100
1000
f=1kHz
80
70
60
Io=30mA
50
Io=100mA
40
80
70
60
20
@:Ta=25 C
VIN=4V
ein=200mVrms
Co=2.2uF(Ceramic)
10
10
100
100
f=10kHz
50
40
o
30
o
30
1k
1000
Frequency : f (Hz)
8
10
90
Ripple Rejection : RR (dB)
Ripple Rejection Ratio : RR (dB)
Io=10mA
1
NJM2856(1A)_mold_3.0V
Ripple Rejection vs. Output Current
100
90
0.1
Output Current : Io(mA)
4
10k
10
5
100k
10
@:Ta=25 C
VIN=4V
ein=200mVrms
Co=2.2uF(Ceramic)
20
0.001
0.01
0.1
1
10
100
1000
Output Current : Io(mA)
Ver.2008-11-12
NJM2856
TYPICAL CHARACTERISTICS
NJM2856(2A)_mold_3.0V
Equivalent Serise Resistance vs. Output Current
100
NJM2856_3.0V
Dropout Voltage v.s. Temperature
0.4
@:Io=600mA
Vcont=4.0V
Cin=0.33uF(Ceramic)
Co=4.7uF(Ceramic)
0.3
10
Dropout Voltage:dVI-O (V)
Equivalent Serise Resistance : ESR[Ω]
0.35
STABLE REGION
1
0.25
0.2
0.15
0.1
o
@:Ta=25 C
Co=2.2uF(Ceramic)
VIN=4.0V
Io>700mA:Using cooler
0.1
0.02
0.001
0.05
0
0.01
0.1
1
10
100
10
3
-50
0
100
150
o
NJM2856_3.0V
Control Voltage v.s. Temperature
NJM2856_3.0V
Output Voltage v.s. Temperature
3.1
50
Temperature : Ta ( C)
Output Current : Io(mA)
2
@:Vin= Vcont=4.0V
Io=30mA
Cin=0.33uF(Ceramic)
Co=4.7uF(Ceramic)
Control Voltage : V CONT(ON) (V)
Output Voltage Vo (V)
3.05
3
2.95
1.5
1
0.5
@:VIN=4.0V
Io=30mA
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
0
2.9
-50
0
50
100
-50
150
0
Temperature Ta ( C)
60
@:VIN=4.0V
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
500
Quiescent Current : I Q (uA)
Control Current : Icont (uA)
150
NJM2856_3.0V
Quiescent Current v.s. Temperature
600
40
30
100
Temperature : Ta ( C)
NJM2856_3.0V
Control Current v.s. Temperature
50
50
o
o
VCONT=4V
20
VCONT=1.6V
10
Iq+Icont
400
300
Iq
200
Vin=Vcont=4.0V
Output is open
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
100
0
0
-50
0
50
100
o
Temperature : Ta ( C)
Ver.2008-11-12
150
-50
0
50
100
150
o
Temperature : Ta ( C)
9
NJM2856
TYPICAL CHARACTERISTICS
NJM2856_3.0V
Line Regulation v.s. Temperature
NJM2856_3.0V
Short Circuit Current v.s. Temperature
0.1
1000
@:VIN=4.0V
Output is short to ground.
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
Line Regulation : dVo/dIo (%/V)
Short Circuit Current : I SC (mA)
800
600
400
200
0.05
0
-0.05
@:dVIN=4.0-8.0V
Vcont=4.0V
Io=30mA
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
-0.1
0
-50
0
50
100
-50
150
0
150
NJM2856_3.0V
Peak Output Current v.s. Temperature
NJM2856_3.0V
Load Regulation v.s. Temperature
3000
0.03
@:VIN=4.0V
Vcont=4.0V
Io=0-1000mA
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
2400
Peak Output Current : I MAX (mA)
Load Regulation : dVo/dIo (%/mA)
100
Temperature : Ta ( C)
Temperature : Ta ( C)
0.025
50
o
o
0.02
0.015
0.01
0.005
1800
md=1ms
1200
md=100ms
@:VIN=4.0V
Vcont=4.0V
Cin=0.33uF(Ceramic)
Co=2.2uF(Ceramic)
600
0
0
-50
0
50
100
150
-50
0
50
100
150
o
o
Temperature : Ta ( C)
Temperature : Ta ( C)
NJM2856_3.0V
Output Voltage v.s. Temperature
3.1
@:Vin= Vcont=4.0V
Io=30mA
Cin=0.33uF(Ceramic)
Co=4.7uF(Ceramic)
Output Voltage Vo (V)
3.05
3
2.95
2.9
-50
0
50
100
150
o
Temperature Ta ( C)
10
Ver.2008-11-12
NJM2856
TYPICAL CHARACTERISTICS
NJM2856_3V
Line Transient Response
3.1
NJM2856_3V
Load Transient Response
6
1100
3.25
Output Current
5
3.08
3.2
1000
3.15
900
3.1
800
3.04
3
2
3.02
Output Voltage
1
3
0
2.98
@: Ta=25°C
VIN=4V
Co=2.2µF
Io=30mA
2.96
-1
-2
2.94
0
40
80
120
Time : t[µs]
160
200
700
3.05
600
Output Voltage
3
Output Current : Io[mA]
4
Output Voltage : Vo[V]
3.06
Input Voltage : VIN[V]
Output Voltage : Vo[V]
Input Voltage
500
2.95
400
2.9
300
2.85
0
40
80
120
160
200
Time : t[µs]
[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
11