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| 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 2.465V1% 2.9mm x 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 -1- NJM1431A ABSOLUTE MAXIMUM RATINGS (Ta=25C) 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=25C) PARAMETER SYMBOL MIN. TYP. Cathode Voltage VKA VREF - Cathode Current IK 1 - MAX. 36 100 UNIT V mA ELECTRICAL CHARACTERISTICS (IK=10mA, Ta=25C) 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=10k, R2= VKA=VREF, VREF=1% VKA=36V, VREF=0V VKA= VREF, f1kHz 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 TEMPERATURE CHARACTERISTICS (IK=10mA, Ta= -40C ~ 85C) PARAMETER SYMBOL TEST CONDITION Reference Voltage Change Reference Input Current Change VREF IREF VKA=VREF R1=10k, 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) -2- 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 x 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 -3- 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=10k, 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=10k, 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| () 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) -4- 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- |
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