ADJUSTABLE PRECISION SHUNT REGULATOR NJM431SU NJM431SF NJM432SU NJM432SF 1.CATHODE 1.N.C. 2.ANODE 2.ANODE 3.CATHODE 2.ANODE 3.

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1 ADJUSTABLE PRECISION SHUNT REGULATOR GENERAL DESCRIPTION The NJM431S/NJM432S are adjustable precision shunt regulators. The output voltage may be set to any value between VREF (about 2.5V) and 36V by two resistors. Compared to the conventional 431, the NJM431S/NJM432S are improved the voltage accuracy. And they have smaller package option to support a wide range of applications. The NJM432S is the pin assignment option. PACKAGE OUTLINE NJM431SU NJM432SU (SOT-89-3) NJM431SF NJM432SF (SOT-23-5) FEATURES Operating Voltage V REF to 36V Precision Voltage Reference 2.495±1.8% Adjustable Output Voltage Bipolar Technology Package Outline NJM431SU / NJM432SU SOT-89-3 NJM431SF / NJM432SF SOT-23-5 BLOCK DIAGRAM / SYMBOL CATHODE CATHODE REFERENCE V REF + - REFERENCE ANODE ANODE PIN CONFIGURATION NJM431SU NJM431SF NJM432SU NJM432SF REFERENCE 1.N.C. 1.CATHODE 1.N.C. 2.ANODE 2.ANODE* 2.ANODE 2.ANODE 3.CATHODE 3.CATHODE 3.REFERENCE 3.N.C. 4.REFERENCE 4.CATHODE 5.ANODE 5.REFERENCE * Pin 2 is attached to Substrate and must be connected to ANODE or left open. Ver

2 ABSOLUTE MAXIMUM RATINGS (T a =25ºC) PARAMETER SYMBOL MAXIMUM RATINGS UNIT Cathode Voltage 37 (*1) V Continuous Cathode Current I K -1 to 15 ma Reference Input Current I REF -.5 to 1 ma Power Dissipation P D SOT-89-3 : 45(*2) : 13(*3) SOT-23-5 : 48(*4) mw : 65(*5) Operating Temperature Range T opr -4 to +125 C Storage Temperature Range T stg -5 to +15 C (*1) Unless specified, all voltage value are with respect to the anode pin. (*2) Mounted on glass epoxy board. ( mm: EIA/JEDEC standard size, 2Layers) (*3) Mounted on glass epoxy board. ( mm: EIA/JEDEC standard size, 4Layers) (For 4Layers: Applying mm inner Cu area and a thermal via hole to a board based on JEDEC standard JESD51-5) (*4) Mounted on glass epoxy board. ( mm: EIA/JEDEC standard size, 2Layers) (*5) Mounted on glass epoxy board. ( mm: EIA/JEDEC standard size, 4Layers), internal Cu area: mm RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL MIN. TYP. MAX. UNIT Cathode Voltage V REF - 36 V Cathode Current I K.7-1 ma ELECTRICAL CHARACTERISTICS (I K =1mA, T a =25ºC) PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Reference Voltage V REF =V REF (*6) mv Reference Input Voltage Change V REF =V REF (*6) Over Temperature Range (dev) T a =-4 C to +85 C mv Reference Voltage Change V REF / (*7) =1V-V REF vs. Cathode Voltage Change =36V-1V -1-2 mv/v Reference Input Current I REF R1=1kΩ, R2= (*7) µa Reference Input Current Change I REF R1=1kΩ, R2= (*7) Over Temperature Range (dev) T a =-4 C to +85 C µa Minimum Cathode Current I MIN =V REF (*6) ma OFF State Cathode Current I OFF =36V, V REF =V(*8) µa Dynamic Impedance ΙZ KA Ι =V REF, I K =1mA to 1mA, f 1kHz(*6) Ω The maximum value of Dynamic Impedance, Reference Voltage Change and Reference Input Current Change are determined based on sampling evaluation from the initial production lots, and thus not tested in the production test. Therefore, these values are for the reference design purpose only. (*6) Test Circuit Fig.1 (*7) Test Circuit Fig.2 (*8) Test Circuit Fig Ver

3 TEST CIRCUIT INPUT INPUT INPUT I K R1 I REF I K I OFF V REF R2 V REF Fig.1 Test Circuit for =V REF Fig. 2 Test Circuit for >V REF Fig.3 Test Circuit for I OFF V O = =V REF R1 VO VKA VREF 1 IREF R1 R2 POWER DISSIPATION vs. AMBIENT TEMPERATURE NJM431SU / NJM432SU (SOT-89-3) Power Dissipation (Topr=-4ºC to +125ºC, Tj=15ºC) NJM431SF / NJM432SF (SOT-23-5) Power Dissipation (Topr=-4ºC to +125ºC, Tj=15ºC) (*3) on 4 Layers Board 7 (*5) on 4 Layers Board 12 6 Package Power : Pd [mw] (*2) on 2 Layers Board Package Power : Pd [mw] (*4) on 2 Layers Board Ambient Temperature : Ta [ºC] Ambient Temperature : Ta [ºC] (*2) Mounted on glass epoxy board. ( mm: EIA/JEDEC standard size, 2Layers) (*3) Mounted on glass epoxy board. ( mm: EIA/JEDEC standard size, 4Layers) (For 4Layers: Applying mm inner Cu area and a thermal via hole to a board based on JEDEC standard JESD51-5) (*4) Mounted on glass epoxy board. ( mm: EIA/JEDEC standard size, 2Layers) (*5) Mounted on glass epoxy board. ( mm: EIA/JEDEC standard size, 4Layers), internal Cu area: mm Ver

4 TYPICAL CHARACTERISTICS 2.54 Reference Voltage vs. Cathode Current =V REF, Ta=25ºC 2.54 Reference Voltage vs. Ambient Temperature =V REF, I K =1mA Reference Voltage : V REF [V] Cathode Current : I K [ma] Reference Voltage : V REF [V] Ambient Temperature : T a [ºC] Reference Input Current vs. Ambient Temperature R1=1kΩ, R2=, I K =1mA Reference Voltage vs. Cathode Voltage R1=1k to 15kΩ, R2=1kΩ, I K =1mA, T a =25ºC Reference Input Current : I REF [μa] Reference Voltage : V REF [V] Ambient Temperature : T a [ºC] Cathode Voltage : [V].5 Dynamic Impedance vs. Frequency I K =1mA to 1mA, =V REF, Ta=25ºC Dynamic Impedance : IZ KA I [Ω] Frequency : f [khz] Ver

5 TYPICAL CHARACTERISTICS Cathode Current : I K [ma] Safety Operating Boundary Condition R IN =3Ω, =V REF, Ta=25ºC Stable Operation Region Ceramic Capacitor Unstable Operation Region Stable Operation Region Cathode Current : I K [ma] Safety Operating Boundary Condition R IN =3Ω, V K =V REF, Ta=25ºC Aluminum Electrolytic Capacitor Stable Operation Region Unstable Operation Region Output Capacitor : C OUT [µf] Output Capacitor : C OUT [µf] Safety Operating Boundary Condition Test Circuit R IN =3Ω I K V + C OUT 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. Ver

6 [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