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.
NJM2373F/AF
NJM2376F
NJM2373AU
NJM2376U
■FEATURES
●
Operating Voltage
V
REF
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
1.25V±2%
1.25V±1%
■BLOCK
DIAGRAM
CATHODE
■PIN
CONFIGURATION
NC 1
ANODE 2
NC 3
4 REFERENCE
5 CATHODE
REFERENCE
NJM2373F/73AF
NC 1
ANODE 2
V
REF
5 REFERENCE
4 CATHODE
NC 3
NJM2376F
REFERENCE 1
ANODE 2
CATHODE 3
ANODE
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
V
KA
Continuous Cathode Current
I
K
Reference Input Current
I
REF
Power Dissipation
Operating Temperature Range
Storage Temperature Range
P
D
T
OPR
T
STG
MAXIMUM RATINGS
+14
-30 ~ 50
-10 ~ 0.05
(SOT-89) 350
(MTP5)
200
-40 ~ +85
-40 ~ +150
UNIT
V
mA
mA
mW
°C
°C
■RECOMMENDED
OPERATING CONDITIONS (Ta=25°C)
PARAMETER
SYMBOL
MIN.
TYP.
Cathode Voltage
V
KA
V
REF
–
Cathode Current
I
K
0.5
–
MAX.
13
30
UNIT
V
mA
■ELECTRICAL
CHARACTERISTICS (I
K
=1mA, Ta=25°C)
PARAMETER
Reference Voltage
Reference Voltage
Change vs. Cathode
Voltage Change
Reference Input Current
Minimum Input Current
Cathode Current
(Off Cond.)
Dynamic Impedance
SYMBOL
V
REF
∆V
REF
/
∆V
KA
I
REF
I
MIN
I
OFF
⎮Z
KA
⎮
TEST CONDITION
V
KA
=V
REF
NJM2373A
V
KA
=V
REF
NJM2373A/ NJM2376
⎮V
REF
⎮≤
V
KA
≤
5V
5V
≤
V
KA
≤
13V
V
KA
=V
REF
R1=10kΩ, R2=∞
V
KA
=V
REF
,
∆V
REF
=±1%
V
KA
=13V, V
REF
=0V
V
KA
= V
REF
, f≤1kHz
0.5mA
≤
I
K
≤
30mA
(*1)
(*1)
(*2)
(*2)
(*2)
(*1)
(*3)
(*1)
MIN.
1225
1237
–
–
–
–
–
–
TYP.
1250
1250
–
–
2.0
80
0.01
0.12
MAX.
1275
1263
±2.7
±2.0
4.0
500
1.0
–
mV/V
mV/V
µA
µA
µA
Ω
UNIT
mV
■TEMPERATURE
CHARACTERISTICS (I
K
=1mA, Ta= -40°C ~ 85°C)
PARAMETER
SYMBOL
TEST CONDITION
Reference Voltage
Change
Reference Input Current
Change
∆V
REF
∆I
REF
V
KA
=V
REF
V
KA
=V
REF
R1=10kΩ, R2=∞
(*1)
(*2)
MIN.
–
–
TYP.
±10
0.5
MAX.
–
–
UNIT
mV
µA
⎮V
REF
⎮···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
I
K
V
KA
INPUT
R1
I
K
I
REF
V
KA
V
REF
R2
V
REF
Fig.1 V
KA
=V
REF
to test circuit
V
O
=V
KA
=V
REF
Fig.2 V
KA
>V
REF
to test circuit
⎛
R1
⎞
V
O
=
V
KA
=
V
REF
⎜
1
+
⎟ +
I
REF
×
R1
⎝
R2
⎠
INPUT
I
OFF
V
KA
I
K
=1mA
10kΩ
470uF
10kΩ
Fig.3 I
OFF
to test circuit
Fig.4 Gain and Phase to test circuit
■POWER
DISSIPATION VS. AMBIENT TEMPERATURE
500
Power Dissipation P
D
(mW)
400
300
MTP5
SOT-89
200
100
0
0
25
50
75
Ambient Temperature Ta (°C)
100
Ver.2009-11-26
-3-
NJM2373/73A/76
■TYPICAL
CHARACTERISTICS
Reference Voltage vs. Cathode Current
(V
KA
=V
REF
,Ta=25°C)
Reference Voltage V
REF
(mV)
Reference Voltage V
REF
(mV)
1260
1255
1250
1245
1240
1400
1200
1000
800
600
0
Reference Voltage vs. Cathode Current
(V
KA
=V
REF
,Ta=25°C)
0
10
20
30
20
40
60
80
100
Cathode Current I
K
(mA)
Reference Voltage Change vs. Cathode Voltage
(I
K
=1mA,R1=Variable,R2=10kΩ,Ta=25°C)
4
Reference Voltage Change
∆V
REF
(mV)
Cathode Current I
K
(uA)
Cathode Current (Off Cond.) vs. Cathode Voltage
(V
REF
=0V,Ta=25°C)
1
Cathode Current I
OFF
(nA)
0.8
0.6
0.4
0.2
0
3
2
1
0
0
5
10
15
Cathode Voltage V
KA
(V)
0
5
10
Cathode Voltage V
KA
(V)
15
Dynamic Impedance |Z
KA
| (Ω)
1.2
1
0.8
0.6
0.4
0.2
0
1
Dynamic Impedance
(I
K
=0.5~30mA,V
KA
=V
REF
,Ta=25°C)
80
60
Voltage Gain A
V
(dB)
40
20
0
-20
-40
-60
-80
100
Voltage Gain · Phase vs. Frequency
(Fig.4 Test Circuit,Ta=25°C)
360
270
90
0
-90
Phase
Φ
(deg)
180
Gain
Phase
-180
-270
-360
10M
10
100
1k
10k
100k
Cathode Current Frequency f (Hz)
1k
10k
100k
1M
Frequency f (Hz)
-4-
Ver.2009-11-26
NJM2373/73A/76
■TYPICAL
CHARACTERISTICS
Safety Operating Boundary Condition
(Rin=1kΩ, V =V
1000
Cathode Current I
K
(µA)
800
600
400
200
0
0.01
Unstable Operaion
Region
0.1
1
Output Capacitor C
10
(µF)
KA
REF
, Ta=25
o
C)
Safety Operating Boundary Condition
Test Circuit
Rin=1kΩ
V
KA
I
K
V
+
C
OUT
Ceramic Capacitor
Stable Operaion
Region
Note) Oscillation might occur while operating within the range of
safety curve.
So that, it is necessary to make ample margins by taking
considerations of fluctuation of the device.
OUT
Safety Operating Boundary Condition
(Rin=1kΩ, V =V
1000
Cathode Current I
K
(µA)
800
600
400
200
0
0.1
Unstable Operaion
Region
Stable Operaion
Region
KA
REF
, Ta=25 C)
o
Aluminum Electrolytic Capacitor
1
Output Capacitor C
10
(µF)
OUT
Ver.2009-11-26
-5-
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