NJM2373

NJM2373/73A/76
ADJUSTABLE HIGH PRECISION SHUNT REGULATOR
■GENERAL DESCRIPTION
■PACKAGE OUTLINE
NJM2373 / NJM2373A / NJM2376 is an adjustable
high precision shunt regulator.
The output voltage can be adjusted to any value
between reference voltage and 14V by two extend
resistors.
■FEATURES
● Operating Voltage
VREF to 13V
● High Precision Voltage Reference NJM2373
NJM2373A/76
● Minimum Input Current
80µA typ.
● Adjustable Output Voltage
● Bipolar Technology
● Package Outline
SOT-89 (3pin), MTP5
■BLOCK DIAGRAM
NJM2373F/AF
NJM2376F
NJM2373AU
NJM2376U
1.25V±2%
1.25V±1%
■PIN CONFIGURATION
CATHODE
NC 1
5 CATHODE
ANODE 2
NC 3
4 REFERENCE
NJM2373F/73AF
REFERENCE
NC 1
5 REFERENCE
ANODE 2
VREF
NC 3
4 CATHODE
NJM2376F
ANODE
REFERENCE 1
ANODE 2
CATHODE 3
NJM2373AU
CATHODE 1
ANODE 2
REFERENCE 3
NJM2376U
Ver.2009-11-26
-1-
NJM2373/73A/76
■ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
SYMBOL
Cathode Voltage
VKA
Continuous Cathode Current
IK
Reference Input Current
IREF
Power Dissipation
PD
Operating Temperature Range
Storage Temperature Range
TOPR
TSTG
MAXIMUM RATINGS
+14
-30 ~ 50
-10 ~ 0.05
(SOT-89) 350
(MTP5)
200
-40 ~ +85
-40 ~ +150
■RECOMMENDED OPERATING CONDITIONS (Ta=25°C)
PARAMETER
SYMBOL
MIN.
TYP.
Cathode Voltage
VKA
VREF
–
Cathode Current
IK
0.5
–
UNIT
V
mA
mA
mW
°C
°C
MAX.
13
30
UNIT
V
mA
■ELECTRICAL CHARACTERISTICS (IK=1mA, Ta=25°C)
PARAMETER
Reference Voltage
Reference Voltage
Change vs. Cathode
Voltage Change
SYMBOL
VREF
∆VREF/
∆VKA
VKA=VREF
NJM2373A
VKA=VREF
NJM2373A/ NJM2376
⎮VREF⎮≤ VKA ≤ 5V
5V ≤ VKA ≤ 13V
MIN.
TYP.
MAX.
(*1)
1225
1250
1275
(*1)
1237
1250
1263
(*2)
–
–
±2.7
mV/V
(*2)
–
–
±2.0
mV/V
mV
(*2)
–
2.0
4.0
µA
IMIN
(*1)
–
80
500
µA
IOFF
VKA=13V, VREF=0V
(*3)
–
0.01
1.0
µA
⎮ZKA⎮
VKA= VREF, f≤1kHz
0.5mA ≤ IK ≤ 30mA
(*1)
–
0.12
–
Ω
MIN.
TYP.
MAX.
UNIT
IREF
Minimum Input Current
Cathode Current
(Off Cond.)
■TEMPERATURE CHARACTERISTICS (IK=1mA, Ta= -40°C ~ 85°C)
PARAMETER
SYMBOL
TEST CONDITION
Reference Voltage
Change
Reference Input Current
Change
UNIT
VKA=VREF
R1=10kΩ, R2=∞
VKA=VREF, ∆VREF=±1%
Reference Input Current
Dynamic Impedance
TEST CONDITION
∆VREF
VKA=VREF
(*1)
–
±10
–
mV
∆IREF
VKA=VREF
R1=10kΩ, R2=∞
(*2)
–
0.5
–
µA
⎮VREF⎮···Reference voltage includes error.
(*1): Test Circuit (Fig.1)
(*2): Test Circuit (Fig.2)
(*3): Test Circuit (Fig.3)
-2-
Ver.2009-11-26
NJM2373/73A/76
■TEST CIRCUIT
INPUT
VKA
INPUT
VKA
IK
R1
R2
VREF
Fig.1 VKA=VREF to test circuit
VREF
Fig.2 VKA>VREF to test circuit
⎛ R1 ⎞
VO = VKA = VREF⎜1 +
⎟ + IREF × R1
⎝ R2 ⎠
VO=VKA=VREF
INPUT
IK
IREF
VKA
IOFF
IK=1mA
10kΩ
470uF
10kΩ
Fig.3 IOFF to test circuit
Fig.4 Gain and Phase to test circuit
■POWER DISSIPATION VS. AMBIENT TEMPERATURE
Power Dissipation PD (mW)
500
400
SOT-89
300
MTP5
200
100
0
0
Ver.2009-11-26
25
50
75
Ambient Temperature Ta (°C)
100
-3-
NJM2373/73A/76
Reference Voltage vs. Cathode Current
(VKA=VREF,Ta=25°C)
1260
Reference Voltage VREF (mV)
1255
1250
1245
1240
0
10
20
Reference Voltage vs. Cathode Current
(VKA=VREF,Ta=25°C)
1400
1200
1000
800
600
0
30
20
80
100
Cathode Current (Off Cond.) vs. Cathode Voltage
(VREF=0V,Ta=25°C)
1
Cathode Current IOFF (nA)
Reference Voltage Change
∆VREF (mV)
Reference Voltage Change vs. Cathode Voltage
(IK=1mA,R1=Variable,R2=10kΩ,Ta=25°C)
4
3
2
1
0.8
0.6
0.4
0.2
0
0
0
5
10
15
0
5
10
Cathode Voltage VKA (V)
Cathode Voltage VKA (V)
Dynamic Impedance
(IK=0.5~30mA,VKA=VREF,Ta=25°C)
1.2
80
Voltage Gain · Phase vs. Frequency
(Fig.4 Test Circuit,Ta=25°C)
0.8
0.6
0.4
0.2
0
1
10
100
1k
10k
100k
Cathode Current Frequency f (Hz)
15
360
270
60
1
Voltage Gain AV (dB)
Dynamic Impedance |ZKA| (Ω)
60
Cathode Current IK (uA)
Cathode Current IK (mA)
-4-
40
Gain
40
180
20
90
0
0
-90
-20
Phase
-40
-270
-60
-80
100
-180
Phase Φ (deg)
Reference Voltage VREF (mV)
■TYPICAL CHARACTERISTICS
1k
10k
100k
1M
Frequency f (Hz)
-360
10M
Ver.2009-11-26
NJM2373/73A/76
■TYPICAL CHARACTERISTICS
Safety Operating Boundary Condition
Test Circuit
Safety Operating Boundary Condition
(Rin=1kΩ, V =V
KA
1000
REF
o
, Ta=25 C)
Rin=1kΩ
Cathode Current IK (µA)
Ceramic Capacitor
800
VKA
IK
Stable Operaion
Region
600
V+
COUT
400
Unstable Operaion
Region
200
0
0.01
Note) Oscillation might occur while operating within the range of
safety curve.
0.1
1
Output Capacitor C
OUT
10
(µF)
So that, it is necessary to make ample margins by taking
considerations of fluctuation of the device.
Safety Operating Boundary Condition
(Rin=1kΩ, V =V
KA
1000
o
, Ta=25 C)
REF
Cathode Current IK (µA)
Aluminum Electrolytic Capacitor
800
600
Stable Operaion
Region
400
200
0
0.1
Unstable Operaion
Region
1
Output Capacitor C
OUT
Ver.2009-11-26
10
(µF)
-5-
NJM2373/73A/76
■TYPICAL CHARACTERISTICS
1260
1255
1250
1245
1240
0
25
50
75 100 125 150
2.5
2
1.5
0
25
50
75 100 125 150
Ambient Temperature Ta (°C)
Ambient Temperature Ta (°C)
Cathode Current (Off Cond.) vs. Temperature
(VKA=13V,VREF=0V)
1
Output Noise Voltage vs. Temperature
(IK=1mA,VKA=VREF)
0.8
0.6
0.4
0.2
140
120
100
80
60
40
20
0
0
-50 -25
0
25
50
75 100 125 150
Ambient emperature Ta (°C)
-6-
3
Reference Input Current vs. Temperature
(IK=1mA,R1=10kΩ,R2= )
-50 -25
Output Noise Voltage
VNO (uVrms)
Cathode Current IOFF (uA)
-50 -25
Reference Input Current IREF (uA)
Reference Voltage VREF (mV)
Reference Voltage vs. Temperature
(IK=1mA,VKA=VREF)
-50 -25
0
25
50
75 100 125 150
Ambient Temperature Ta (°C)
Ver.2009-11-26
NJM2373/73A/76
MEMO
[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.2009-11-26
-7-