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. NJM1431AU ■FEATURES ● Operating Voltage VREF to 36V ● Precision Voltage Reference 2.465V±1% ● 1.6mm × 1.2mm to ESON4 package ● Adjustable Output Voltage ● Bipolar Technology ● Package Outline NJM1431AU : SOT89 (3pin) NJM1431AF : SOT-23-5 (MTP5) NJM1431AKF1 : ESON4-F1 ■BLOCK DIAGRAM NJM1431AF NJM1431AKF1 ■PIN CONFIGURATION CATHODE 1 REFERENCE 2 1. REFERENCE 2. ANODE 3. CATHODE 3 NJM1431AU VREF NC 1 5 REFERENCE ANODE 2 4 CATHODE NC 3 ANODE NJM1431AF REFERENCE 1 CATHODE 2 4 3 ANODE NC 4 3 1 2 Exposed PAD on backside connect to ANODE. (Top View) (Bottom View) NJM1431AKF1 Ver.2010-03-26 -1- NJM1431A ■ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL Cathode Voltage VKA Continuous Cathode Current IK Reference Input Current IREF Power Dissipation PD MAXIMUM RATINGS +37 -100 ~ 150 -0.05 ~ 10 SOT89 (3pin) 350 SOT-23-5 200 ESON4-F1 412 (*1) 1,150 (*2) -40 ~ +85 -40 ~ +150 UNIT V mA mA mW °C °C (*1): Mounted on glass epoxy board based on EIA/JEDEC. (101.5 × 114.57 × 1.6mm: 2Layers) (*2): Mounted on glass epoxy board based on EIA/JEDEC. (101.5 × 114.57 × 1.6mm: 4Layers Internal foil area: 99.5 × 99.5mm) Operating Temperature Range Storage Temperature Range TOPR TSTG ■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 TEST CONDITION TYP. MAX. UNIT VKA=VREF ⎮VREF⎮≤ VKA ≤ 10V (*3) (*4) 2.440 – 2.465 ±1.4 2.490 ±2.7 V mV/V 10V ≤ VKA ≤ 36V (*4) – ±1.0 ±2.0 mV/V IREF IMIN R1=10kΩ, R2=∞ VKA=VREF, ∆VREF=1% (*4) (*3) – – 2 0.4 4 1.0 uA mA IOFF VKA=36V, VREF=0V (*5) – 0.1 1.0 uA ⎮ZKA⎮ VKA= VREF, f≤1kHz 1mA ≤ IK ≤ 100mA (*3) – 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 (*3) – 8 17 mV ∆IREF R1=10kΩ, R2=∞ (*4) – 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. (*3): Test Circuit (Fig.1) (*4): Test Circuit (Fig.2) (*5): Test Circuit (Fig.3) -2- Ver.2010-03-26 NJM1431A ■TEST CIRCUIT INPUT VKA INPUT IK INPUT IK R1 VKA IOFF IREF R2 VREF VKA VREF Fig.1 VKA=VREF to test circuit Fig.2 VKA>VREF to test circuit Fig.3 IOFF to test circuit VO=VKA=VREF R1 ⎞ ⎛ VO = VKA = VREF⎜ 1 + ⎟ + IREF × R1 ⎝ R2 ⎠ ■POWER DISSIPATION VS. AMBIENT TEMPERATURE Power Dissipation vs. Ambient Temparaure (Topr=-40~+85 C, Tj= ∼150 C) o Power Dissipation P D (mW) 1200 1000 800 600 ESON4-F1 At on 4 layer PC board At on 2 layer PC board 400 200 0 -50 Ver.2010-03-26 o SOT89 (3pin) SOT-23-5 -25 0 25 50 75 Ambient Temperature Ta (oC) 100 -3- NJM1431A ■TYPICAL CHARACTERISTICS Reference Voltage vs. Cathode Current Reference Voltage vs. Temperature (VKA =VREF , IK=10mA) o (VKA =VREF , Ta=25 C) Reference Voltage VREF (V) 2.49 2.48 2.46 2.44 2.42 2.4 0.1 1 10 Cathode Current IK (mA) 100 2.48 2.47 2.46 2.45 2.44 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (oC) Reference Voltage vs. Cathode Voltage Reference Input Current vs. Temperature (I =10mA, R1=10kΩ, R2= ) (IK=10mA, R1=Variable, R2=10kΩ, Ta=25oC) 2.49 2 K Reference Voltage VREF (V) Reference Input Current IREF (uA) 8 Reference Voltage VREF (V) 2.5 1.5 1 0.5 0 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (oC) 2.48 2.47 2.46 2.45 2.44 0 10 20 30 Cathode Voltage VKA (V) 40 Dynamic Impedance (I =1 to 100mA, V =V Dynamic Impedance |ZKA| (Ω) 0.5 -4- K KA REF , 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) Ver.2010-03-26 NJM1431A ■TYPICAL CHARACTERISTICS Safety Operating Boundary Condition (Rin=30Ω, VKA =VREF , Ta=25oC) Cathode Current IK (mA) 100 Safety Operating Boundary Condition Test Circuit Ceramic Capacitor 80 Rin=30Ω VKA 60 Stable Operaion 40 Region 20 0 0.01 IK V+ COUT Unstable Operaion Region 0.1 1 Output Capacitor COUT (µF) 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. Safety Operating Boundary Condition (Rin=30Ω, V =V KA 100 o , Ta=25 C) REF 80 K Cathode Current I (mA) Aluminum Electrolytic Capacitor 60 Stable Operaion Region 40 20 0 0.1 Unstable Operaion Region 1 Output Capacitor C OUT Ver.2010-03-26 10 (µF) -5- 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. -6- Ver.2010-03-26