TS431XRIX-Z TSC | Alldatasheet

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Technical content

1 Version: B1608

2.495V Programmable Shunt Voltage Reference

DESCRIPTION

TS431 integrated circuits are three-terminal programmable shunt regulator diodes. These monolithic IC voltage references operate as a low temperature coefficient zener which is programmable from V REF to 36V with two external resistors. These devices exhibit a wide operating current range to 250mA with a typical dynamic impedance of 0.2 Ω. The characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supp lies, and op amp circuitry. The 2.495V reference makes it convenient to obtain a stable reference from 5.0V l ogic supplies, and since The TS431 operates as a shunt regulator, it can be used as either a positive or negative stage reference .

FEATURES

  • Programmable Output Voltage up to 36V
  • TS431A – V REF 2.495V ±1% tolerance
  • TS431B – V REF 2.495V ±0.5% tolerance
  • Fast Turn-On Response
  • Sink Current Capability: 120mA
  • Low Dynamic Output Impedance: 0.2Ω (Typ.)
  • Min. Operating Cathode Current: 0.2mA (Typ.)
  • Compliant to RoHS Directive 2011/65/EU and in accordance to WEEE 2002/96/EC
  • Halogen-free according to IEC 61249-2-21 APPLICATION
  • SMPS
  • Lighting
  • Telecommunication
  • Home appliance SOT -23 Pin Definition : 1. Cathode 2. Reference 3. Anode Notes: MSL 3 (Moisture Sensitivity Level) per J-STD-020 SIMPLIFIED SCHEMATIC

2 Version: B1608

ABSOLUTE MAXIMUM RATINGS (TA = 25°C unless otherwise noted) PARAMETER SYMBOL LIMIT UNIT Cathode Voltage VKA 36 V Continuous Cathode Current IK 120 mA Reference Input Current IREF 10 mA Power Dissipation PD 0.25 W Operating Temperature Range T OPER -40 ~ +125 oC Junction Temperature TJ +150 oC Storage Temperature Range TSTG -40 ~ +150 oC THERMAL PERFORMANCE PARAMETER SYMBOL LIMIT UNIT Thermal Resistance - Junction to Case RӨJC 110 oC/W Thermal Resistance - Junction to Ambient R ӨJA 350 oC/W Note: Consider measured with the PCB copper area of approximately 1 in 2 (Multi-Layer) ELECTRICAL SPECIFICATIONS (TA=+25 oC, unless otherwise specified) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT Reference voltage V REF VKA =V REF , IK =10mA (Figure 1) TS431A 2.470 2.495 2.520 V TS431B 2.483 2.507 Deviation of reference input voltage ∆ VREF VKA = V REF , IK =10mA (Figure 1) TA=-20~85 oC -- 25 35 mV Radio of change in Vref to change in cathode Voltage ∆VREF /∆VKA IKA =10mA, (Figure 2) VKA = 10V to V REF -- -1.2 -2.0 mV/V VKA = 36V to 10V -- -1.0 -2.0 Reference Input current I REF R1=10kΩ, R2= ∞ IKA =10mA (Figure 2) -- 1.5 3.5 µA Deviation of reference input current, over temp. ∆IREF R1=10kΩ, R2= ∞ , IKA =10mA TA=-20~85 oC (Figure 2) -- 0.4 1.2 µA Off-state Cathode Current I KA (off) V REF =0V (Figure 3) , VKA =36V -- 0.1 1.0 µA Dynamic Output Impedance | ZKA | f<1kHz, V KA = VREF (Figure 1) -- 0.2 0.5 Ω Minimum operating cathode current IKA (min) V KA = V REF (Figure 1) -- 0.2 0.5 mA Note: The deviation parameters ∆V REF and ∆I REF are defined as difference between the maximum value and minimum value obtained over the full operating ambient temperature range that applied.

ORDERING INFORMATION

PART NO. PACKAGE PACKING TS431ARIX-Z RFG SOT-23 3,000pcs / 7” Reel TS431BRIX-Z RFG SOT-23 3,000pcs / 7” Reel

3 Version: B1608

Figure 1. VREF vs. Ambient Temperature Figure 2. IREF vs. Ambient Temperature Figure 3. Cathode Current vs. Cathode Voltage Figure 4. Cathode Current vs. Cathode Voltage Figure 5. Off-State Cathode current Figure 6. Ration of delta reference voltage to

4 Version: B1608

TYPICAL PERFORMANCE CHARACTERISTICS Small-Signal Voltage Gain and Phase Shift vs. Frequency Reference Impedance vs. Frequency Pulse Response

5 Version: B1608

TYPICAL PERFORMANCE CHARACTERISTICS Stability Boundary Condition

6 Version: B1608

PACKAGE OUTLINE DIMENSIONS (Unit: Millimeters) SOT-23 SUGGESTED PAD LAYOUT (Unit: Millimeters) MARKING DIAGRAM xR = Device code A = TS431A B = TS431B Y = Year Code M = Month Code for Halogen Free Product O =Jan P =Feb Q =Mar R =Apr S =May T =Jun U =Jul V =Aug W =Sep X =Oct Y =Nov Z =Dec L = Lot Code (1~9, A~Z) xRYML

7 Version: B1608

Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, to any intellectual property rights is granted by this document. Except as provided in TSC’s terms and co nditions of sale for such products, TSC assumes no liability wh atsoever, and disclaims any express or implied warr anty, relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applica tions. Customers using or selling these products for use i n such applications do so at their own risk and agr ee to fully indemnify TSC for any damages resulting from such improper use or sale.