NJM1431A
ADJUSTABLE HIGH PRECISION SHUNT REGULATOR
■GENERAL DESCRIPTION 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. ■PACKAGE OUTLINE
NJM1431AL1
NJM1431AU
■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
NJM1431AF
■BLOCK DIAGRAM
CATHODE
■PIN CONFIGURATION
REFERENCE
1 2 3 1 2 3
1. REFERENCE 2. ANODE 3. CATHODE
NJM1431AL1
VREF
NJM1431AU
NC 1
ANODE
5 REFERENCE
ANODE 2 NC 3 4 CATHODE
NJM1431AF
Ver.2004-01-13
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NJM1431A
■ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL Cathode Voltage VKA Continuous Cathode Current IK Reference Input Current IREF Power Dissipation Operating Temperature Range Storage Temperature Range PD TOPR TSTG
MAXIMUM RATINGS +37 -100 ~ 150 -0.05 ~ 10 (TO-92) 500 (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 VKA VREF – Cathode Current IK 1 –
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 ∆VREF/ ∆VKA IREF IMIN IOFF ZKA TEST CONDITION VKA=VREF VREF≤ VKA ≤ 10V 10V ≤ VKA ≤ 36V R1=10kΩ, R2=∞ VKA=VREF, ∆VREF=1% VKA=36V, VREF=0V VKA= VREF, f≤1kHz 1mA ≤ IK ≤ 100mA (*1) (*2) (*2) (*2) (*1) (*3) (*1) MIN. 2.440 – – – – – – TYP. 2.465 ±1.4 ±1.0 2 0.4 0.1 0.2 MAX. 2.490 ±2.7 ±2.0 4 1.0 1.0 0.5 UNIT V mV/V mV/V uA mA uA Ω
■TEMPERATURE CHARACTERISTICS (IK=10mA, Ta= -40°C ~ 85°C) PARAMETER SYMBOL TEST CONDITION Reference Voltage Change Reference Input Current Change ∆VREF ∆IREF VKA=VREF R1=10kΩ, R2=∞ (*1) (*2)
MIN. – –
TYP. 8 0.4
MAX. 17 1.2
UNIT mV 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 IK VKA INPUT R1 IK IREF VKA INPUT IOFF VKA
VREF
R2
VREF
Fig.1 VKA=VREF to test circuit VO=VKA=VREF
Fig.2 VKA>VREF to test circuit
R1 VO = VKA = VREF1 + + IREF × R1 R2
Fig.3 IOFF to test circuit
■POWER DISSIPATION VS. AMBIENT TEMPERATURE
600 TO-92 Power Dissipation PD (mW) 500 400 300 MTP5 200 100 0 0 25 50 75 Ambient Temperature Ta (°C) 100 SOT-89
Ver.2004-01-13
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NJM1431A
■TYPICAL CHARACTERISTICS
Reference Voltage vs. Cathode Current 2.5 Reference Voltage VREF (V) 2.48 2.46 2.44 2.42 2.4 0.1 (V =V
KA REF
, Ta=25oC)
2.49 Reference Voltage VREF (V) 2.48 2.47 2.46 2.45
Reference Voltage vs. Temperature (VKA=VREF , IK=10mA)
1 10 Cathode Current IK (mA)
100
2.44 -50 -25 0 25 50 75 100 125 150 o Ambient Temperature Ta ( C)
Reference Voltage vs. Cathode Voltage (I =10mA, R1=Variable, R2=10kΩ, Ta=25oC) K 2.49 Reference Voltage VREF (V) 2.48 2.47 2.46 2.45 2.44
Reference Input Current IREF (uA)
2 1.5 1 0.5
Reference Input Current vs. Temperature (I =10mA, R1=10kΩ, R2= )
K
0 -50 -25 0 25 50 75 100 125 150 o Ambient Temperature Ta ( C)
8
0
10 20 30 Cathode Voltage V (V)
KA
40
Safety Operating Boundary Condition (V =V , C =Ceramic Capacitor, Ta=25 C) KA REF OUT 100 80 60 40 20 0 0.01 Stable Operaion Region
Dynamic Impedance |ZKA| (Ω)
o
Dynamic Impedance 0.5 0.4 0.3 0.2 0.1 0 0.001 0.01 0.1 1 10 100 Cathode Current Frequency f (kHz) (IK=1 to 100mA, VKA =VREF, Ta=25oC)
Cathode Current IK (mA)
Aunstable Operaion Region 10
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.
0.1 1 Output Capacitor COUT (uF)
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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
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