NJRC NJM1431AU

NJM1431A
ADJUSTABLE HIGH PRECISION SHUNT REGULATOR
■GENERAL DESCRIPTION
■PACKAGE OUTLINE
The NJM1431A is a precision shunt regulator.
Compared to the conventional 431, The NJM1431A offers
higher voltage accuracy and small package availability to
support a wide range of applications.
NJM1431AL1
■FEATURES
● Operating Voltage
VREF to 36V
● Precision Voltage Reference
2.465V±1%
● 2.9mm × 1.5mm to MTP (SOT23) package
● Adjustable Output Voltage For
External Resistance two Parts.
● Bipolar Technology
● Package Outline
TO-92, SOT-89 (3pin), MTP5
■BLOCK DIAGRAM
NJM1431AU
NJM1431AF
■PIN CONFIGURATION
CATHODE
1. REFERENCE
2. ANODE
3. CATHODE
REFERENCE
1
2
1
3
NJM1431AL1
2
3
NJM1431AU
VREF
NC 1
ANODE
5 REFERENCE
ANODE 2
NC 3
4 CATHODE
NJM1431AF
Ver.2004-01-13
-1-
NJM1431A
■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
+37
-100 ~ 150
-0.05 ~ 10
(TO-92)
500
(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
1
–
UNIT
V
mA
mA
mW
°C
°C
MAX.
36
100
UNIT
V
mA
■ELECTRICAL CHARACTERISTICS (IK=10mA, 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
VREF
TEST CONDITION
TYP.
MAX.
UNIT
VKA=VREF
VREF≤ VKA ≤ 10V
(*1)
(*2)
2.440
–
2.465
±1.4
2.490
±2.7
V
mV/V
10V ≤ VKA ≤ 36V
(*2)
–
±1.0
±2.0
mV/V
IREF
IMIN
R1=10kΩ, R2=∞
VKA=VREF, ∆VREF=1%
(*2)
(*1)
–
–
2
0.4
4
1.0
uA
mA
IOFF
VKA=36V, VREF=0V
(*3)
–
0.1
1.0
uA
ZKA
VKA= VREF, f≤1kHz
1mA ≤ IK ≤ 100mA
(*1)
–
0.2
0.5
Ω
MIN.
TYP.
MAX.
UNIT
∆VREF/
∆VKA
■TEMPERATURE CHARACTERISTICS (IK=10mA, Ta= -40°C ~ 85°C)
PARAMETER
SYMBOL
TEST CONDITION
Reference Voltage
Change
Reference Input Current
Change
MIN.
∆VREF
VKA=VREF
(*1)
–
8
17
mV
∆IREF
R1=10kΩ, R2=∞
(*2)
–
0.4
1.2
uA
The maximum value of “Dynamic Impedance“, “Reference Voltage Change” and “Reference Input Current Change”
are determined based on sampling evaluation from the 5 initial production lots, and thus not tested in the production test.
Therefore, these values are for the reference design purpose only.
VREF···Reference voltage includes error.
(*1): Test Circuit (Fig.1)
(*2): Test Circuit (Fig.2)
(*3): Test Circuit (Fig.3)
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Ver.2004-01-13
NJM1431A
■TEST CIRCUIT
INPUT
VKA
INPUT
IK
VKA
IOFF
IREF
R2
Fig.1 VKA=VREF to test circuit
INPUT
IK
R1
VREF
VKA
VREF
Fig.2 VKA>VREF to test circuit
Fig.3 IOFF to test circuit
R1 

VO = VKA = VREF1 +
 + IREF × R1
 R2 
VO=VKA=VREF
■POWER DISSIPATION VS. AMBIENT TEMPERATURE
600
Power Dissipation PD (mW)
TO-92
500
400
SOT-89
300
MTP5
200
100
0
0
Ver.2004-01-13
25
50
75
Ambient Temperature Ta (°C)
100
-3-
NJM1431A
■TYPICAL CHARACTERISTICS
Reference Voltage vs. Cathode Current
(V =V
KA
2.49
Reference Voltage VREF (V)
REF
2.48
2.46
2.44
2.42
2.4
0.1
1
10
Cathode Current IK (mA)
1
0.5
0
-50 -25 0 25 50 75 100 125 150
o
Ambient Temperature Ta ( C)
2.47
2.46
2.45
(I =10mA, R1=Variable, R2=10kΩ, Ta=25oC)
K
2.49
K
1.5
2.48
Reference Voltage vs. Cathode Voltage
Reference Input Current vs. Temperature
(I =10mA, R1=10kΩ, R2= )
Reference Voltage VREF (V)
Reference Input Current IREF (uA)
2
2.48
2.47
2.46
2.45
2.44
80
60
0
0.01
Aunstable Operaion
Region
0.1
1
Output Capacitor COUT (uF)
0.5
Dynamic Impedance |ZKA| (Ω)
Cathode Current IK (mA)
(V =V , C =Ceramic Capacitor, Ta=25 C)
KA
REF
OUT
100
20
10
20
30
Cathode Voltage V (V)
40
Dynamic Impedance
o
Stable
Operaion
Region
0
KA
Safety Operating Boundary Condition
40
Reference Voltage vs. Temperature
(VKA=VREF , IK=10mA)
2.44
-50 -25 0 25 50 75 100 125 150
o
Ambient Temperature Ta ( C)
100
8
Reference Voltage VREF (V)
2.5
, Ta=25oC)
10
(IK=1 to 100mA, VKA =VREF, Ta=25oC)
0.4
0.3
0.2
0.1
0
0.001 0.01
0.1
1
10
100
Cathode Current Frequency f (kHz)
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.
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Ver.2004-01-13
NJM1431A
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.2004-01-13
-5-