SR431

SR431 KODENSHI | Alldatasheet

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Programmable Voltage Reference

Description

The SR431 series are 3-terminal precision shunt regulators that are programmable over a wide voltage range of features make the SR431 series an excellent replacement fo r zener diodes in numerous applications circuits that require a precision reference voltage. ◈ Features  Programmable output voltage from 2.495V to 36V  V oltage reference tolerance : ±0.5%, ±1.0%  Cathode current capability of 1mA to 100mA [ K : Cathode, A: Anode, R : Reference ] PKG : SOT-89 Apply Device : SR431xF R ◈ Pin Assignment PKG : SOT-23 Apply Device : SR431xS PKG : SOT-25 Apply Device : SR431xN PKG : TO-92 Apply Device : SR431x AK A KRA KRA PKG : TO-92M Apply Device : SR431xM (Marking Side View) (Top View) (Top View) (Top View) (Marking Side View) (1)K (2)R (3)A R A K NC NC

Vref Tolerance PKG Type Device Name Marking ±1% TO-92 SR431A SR431ڜ TO-92M SR431AM SR431ڜ SOT-23 SR431AS 1) G4A□2)△ SOT-25 SR431AN 4NA□2) SOT-89 SR431AF SR431A ±0.5% TO-92 SR431B SR431ڝ TO-92M SR431BM SR431B SOT-23 SR431BS 1) G4B□2)△ SOT-25 SR431BN 4NB□2) SOT-89 SR431BF SR431B 1) SR431xS Pin Connection : (1) Cathode, (2) Reference, (3) Anode 2) □ : Year & Week Code 3) △ : Machine Code [SOT-23 PKG.] ◈ Symbol ◈ Functional block diagram ◈ Ordering Information Cathode(K) Anode(A) Reference(R) Reference(R) VREF =2.495V Cathode(K) Anode(A)

◈ A b s o l u t e m a x i m u m r a t i n g s [Ta=25℃] Characteristic Symbol Rating Unit Cathode to Anode voltage V KA 37 V Cathode current Range (Continuous) I K -100~150 mA Reference input current Range I ref -0.05~10 mA Power Dissipation SOT-23 P D(Note1) 350 mW SOT-25 P D(Note1) 400 SOT-89 P D(Note1) 500 TO-92 P D(Note2) 700 TO-92M P D(Note2) 400 Junction Temperature T J 150 ℃ Operating temperature range T opr -40 ~ +85 ℃ Storage temperature range T stg -55 ~ +150 ℃ Note 1 : Mounted on a glass epoxy PCB board (25.4 × 25.4mm).TA=25℃ Note 2 : TA=25℃ ◈ Recommended operating conditions Characteristic Symbol Rating Unit Min. Max. Cathode to Anode voltage V KA V ref 36 V Cathode current IK 1 100 mA ◈ Electrical Characteristics (Ta=25 , unless otherwise noted.)℃ Characteristic Symbol Condi tion Min. Typ. Max. Unit Reference voltage (Fig.1) Vref V KA=Vref, IK=10mA SR431B 2.482 2.495 2.508 V SR431A 2.470 2.520 Reference input voltage deviation over temperature (Fig.1, Note1,2) Vref VKA=Vref , IK=10mA @ -40˚C ≤ Ta ≤ 85˚C - 7 30 mV Ratio of delta reference input voltage to delta cathode voltage (Fig.2) Vref IK=10mA Vref≤VKA≤36V - -1.0 -2.7 mV/V VKA Reference current (Fig.2) I ref IK=10mA, R1=10K, R2= - 1.8 4.0 μΑ Reference input current deviation over temperature (Fig.2, Note 1,2) Iref IK=10mA, R1=10K, R2= Minimum cathode current for regulation IK(MIN) V KA=Vref - 0.35 1.0 mΑ Off-state cathode current (Fig.3) I K(off) V KA=36V , Vref=0V - 2.7 1000 nA Dynamic impedance (Fig.1, Note3) Z KA VKA=Vref, f  1.0KHz 1.0mA ≤ IK ≤ 100mA - 0.15 0.5 

1 )1 ( RIR R Note. 1. Ambient temperature range: TLOW = -40℃, THigh = 85℃ 2. The deviation parameters △Vref and △Iref are defined as the difference betwee n the maximum value and minimum value obtained over the full operating ambient temperature range that applied. The average temperature coefficient of the reference input voltage, refVα is defined as: TΔ )10×)℃25=T(V VΔ( = )℃ ppm(Vα a aref ref ref Example : △Vref = 30mV and the slope is positive, △Vref @ 25℃ = 2.495V △Ta = 70℃ 3. The dynamic impedance ZKA is defined as: K KA KA IΔ VΔ=Ζ When the device is operating with two external resistors, R1 and R2, (refer to Fig.2) the total dynamic impedance of the circuit is given by: R+ 1 ( ×Ζ=Ζ KA KA Fig. 1 Test circuit for VKA=Vref Fig. 2 Test circuit for VKA>Vref Fig. 3 Test circuit for IK(off) KAInput V IK(off) Iref V ref IK KAVInput IK ∆Vref = Vref Max – Vref Min ∆Ta = T2 – T1 Ambient Temperature KAVInput ℃/ppm171=70 10 × )495. 2 03 . 0( = )℃ ppm(Vα ref

Electrical Characteristic Curves ͣͦ͞ ͣ͞͡ ͦ͢͞ ͢͞͡ ͟͡͡ ͦ͟͡ ͢͟͡ ͦ͢͟ ͣ͟͡ ͣͦ͟ ͤ͟͡ ͤͦ͟ ͥ͟͡ ͣ͞͡͡ ͢͞͡͡ ͢͡͡ ͣ͡͡ ͤ͡͡ ͥ͡͡ ͦ͡͡ ͧ͡͡ ͨ͡͡ ͩ͡͡ ͦ͢͞͡ ͣͦ͢͞ ͢͞͡͡ ͨͦ͞ ͦ͞͡ ͣͦ͞ ͢͡͡ ͣͦ͢ ͦ͢͡ ͢͟͞͡ ͩ͟͞͡ ͧ͟͞͡ ͥ͟͞͡ ͣ͟͞͡ ͟͡͡ ͣ͟͡ ͥ͟͡ ͧ͟͡ ͩ͟͡ ͢͟͡ ͟͡͡ ͦ͟͡ ͢͟͡ ͦ͢͟ ͣ͟͡ ͣͦ͟ ͤ͟͡ ͤͦ͟ ͥ͟͡ ͥͦ͟ ͦ͟͡ Fig.4 Vref vs TA Reference V oltage Change - Vref [%] Ambient Temperature - TA [℃] Reference Input Current - Iref [µA] Ambient Temperature - TA [℃] Fig.5 Iref vs TA Fig.6 IKA vs VKA Cathode Current - IKA [mA] Cathode V oltage - VKA [V] Fig.7 IKA vs VKA Cathode V oltage - VKA [V] Fig.8 Ioff vs TA Off-State Cathode Current - Ioff [nA] Ambient Temperature - TA [℃] Fig.9 △V ref vs VKA Cathode V oltage - VKA [V] Cathode Current - IKA [µA] Delta Reference V oltage - △Vref [mV] VKA=Vref IK=10mA IK=10mA R1=10KΩ R2=∞ VKA=Vref TA=25℃ VKA=Vref TA=25℃ VKA= 36V Vref=0V IK=10mA TA=25℃

220Ω 10μF IK 10kΩ 10kΩ OUTPUT GND Voltage Gain Test Circuit 500Ω IK Vout GND Rs=100 Ω Vin ZKA = Vout/Vin x Rs Dynamic Impedance Test Circuit 1uF ◈ Electrical Characteristic Curves Fig.10 AV vs f V oltage Gain - AV [dB] Frequency - f [Hz] Fig.11 |ZKA | vs f Reference Impedance – |ZKA| [Ω] Frequency - f [Hz] IK=10mA TA=25℃ ͟͢͡ ͢͡͡ IK=10mA TA=25℃

Fig.12 Pulse Response V oltage Swing [V] Time [µS] OUTPUT Pulse Generator f = 100kHz GND 220Ω 50Ω Pulse Response Test Circuit Input Output 0.9V/Div 5V/Div

◈ Typical Application VoutVcc Fig14. Shunt Regulator  VrefR RVout 2 11 Vcc Vout Vin Vth=Vref Vin < Vref -> Vout=Vcc Vin > Vref -> Vout ≒2.0V Fig15. Single-Supply Comparator with Temperature-Compensated Threshold IsinkVcc Rs Isink = Vref / RS Fig16. Constant Current Sink Vcc R CL Iout = Vref / RCL Iout Fig17. Constant Current Source VoutVcc  VrefR RVout 2 11 Fig18. Series Pass Regulator Vin(min) = Vout + Vbe Vout(min) = Vref + Vbe VoutVcc Fig19. High Currnet Shunt Regulator  VrefR RVout 2 11

◈ SOT-89 Outline Dimension (unit : mm) ※ Recom m end PCB solder land [ Unit: m m ]

◈ SOT-23 Outline Dimension (unit : mm) ※ Recom m end PCB solder land [ Unit: m m ]

◈ SOT-25 Outline Dimension (unit : mm) ※ Recom m end PCB solder land [ Unit: m m ]

◈ TO-92 Outline Dimension (unit : mm)

◈ TO-92M Outline Dimension (unit : mm)

The AUK Corp. products are intended for the use as components in general electronic equipment (Office and communication e quipment, measuring equipment, home appliance, etc.). Please make sure that you consult with us before you use these AUK Corp. products in equipments which require high quality and / or reliability, and in equipments which could have major impact to the welfare of human life(atomic energy control, airplane, spaceship, transportation, combustion control, all types of safety device, etc.). AUK Corp. cannot accept liability to any damage which may occur in case these AUK Corp. products were used in the mentioned equipments without prior consultation with AUK Corp.. Specifications mentioned in this publication are subject to change without notice.