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TS431

Taiwan Semiconductor

Document Number: DS_P0000235 1 Version: H15

2.495V Programmable Shunt Voltage Reference

GENERAL DESCRIPTION

TS431 series 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 36

volts with two external resistors. These devices exhibit a

wide operating current range of 1.0 to 100mA with a

typical dynamic impedance of 0.22Ω.

The characteristics of these references make them

excellent replacements for zener diodes in many

applications such as digital voltmeters, power supplies,

and op amp circuitry. The 2.5V reference makes it

convenient to obtain a stable reference from 5.0V logic

supplies, and since The TS431 series operates as a

shunt regulator, it can be used as either a positive or

negative stage reference.

FEATURES

● Precision Reference Voltage

TS431 –2.495V ±2%

TS431A – 2.495V ±1%

TS431B – 2.495V ±0.5%

● Equivalent Full Range Temp. Coefficient:

50ppm/°C

● Programmable Output Voltage up to 36V

● Fast Turn-On Response

● Sink Current Capability of 1~100mA

● Low Dynamic Output Impedance: 0.2Ω

● Low Output Noise

APPLICATION

● SMPS

● Lighting

● Telecommunication

● Home appliance

Definition

1. Reference

2. Anode

3. Cathode

SOT

Definition

1. Reference

2. Cathode

3. Anode

SOP

Pin Definition

1. Cathode 5. N/C

2. Anode 6. Anode

3. Anode 7. Anode

4. N/C 8. Reference

Notes:

1. Moisture sensitivity level: level 3. Per J-STD-020 (SOP-8)

2. Moisture sensitivity level: level 1. Per J-STD-020 (SOT-23)

TYPICAL APPLICATIN CIRCUIT

TS431CS RLG

Not Recommended

Summary of content (13 pages)

PAGE 1
TS431 Taiwan Semiconductor 2.495V Programmable Shunt Voltage Reference GENERAL DESCRIPTION FEATURES TS431 series integrated circuits are three-terminal ● Precision Reference Voltage programmable shunt regulator diodes. These monolithic TS431 –2.495V ±2% IC voltage references operate as a low temperature TS431A – 2.495V ±1% coefficient zener which is programmable from VREF to 36 TS431B – 2.495V ±0.5% volts with two external resistors. These devices exhibit a ● Equivalent Full Range Temp.
PAGE 2
TS431 Taiwan Semiconductor ABSOLUTE MAXIMUM RATINGS PARAMETER (Note 1) Cathode Voltage Continuous Cathode Current Range Reference Input Current Range SYMBOL LIMIT UNIT VKA 37 V IK -100 ~ +150 mA IREF -0.05 ~ +10 mA TO-92 0.625 SOT-23 Power Dissipation 0.30 PD SOP-8 W 0.
PAGE 3
TS431 Taiwan Semiconductor ORDERING INFORMATION PART NO. PACKAGE PACKING TS431ACT B0G TO-92 1,000pcs / Bulk TS431BCT B0G TO-92 1,000pcs / Bulk TS431ACT A3G TO-92 2,000pcs / Ammo TS431BCT A3G TO-92 2,000pcs / Ammo TS431ACX RFG SOT-23 3,000pcs / 7” Reel TS431BCX RFG SOT-23 3,000pcs / 7” Reel TS431ACS RLG SOP-8 2,500pcs / 13” Reel TS431BCS RLG SOP-8 2,500pcs / 13” Reel TS431CS RLG SOP-8 2,500pcs / 13” Reel TS BLOCK DIAGRAM No 431 t R CS eco RL mm G en de d Note: 1.
PAGE 4
TS431 Taiwan Semiconductor ADDITIONAL INFORMATION – STABILITY When The TS431/431A/431B is used as a shunt regulator, there are two options for selection of CL, are recommended for optional stability: A) No load capacitance across the device, decouple at the load. B) Large capacitance across the device, optional decoupling at the load. The reason for this is that TS431/431A/431B exhibits instability with capacitances in the range of 10nF to 1uF (approx.) at light cathode current up to 3mA (typ).
PAGE 5
TS431 Taiwan Semiconductor APPLICATIONS EXAMPLES (CONTINUE) Figure 4. High Current Shunt Regulator TS No 431 t R CS eco RL mm G en de d Figure 3. Shunt Regulator Figure 6. Constant Current Source Figure 5. Series Pass Regulator Figure 8. SCR Crowbar Figure 7.
PAGE 6
TS431 Taiwan Semiconductor APPLICATIONS EXAMPLES (CONTINUE) Vout V+ ≈0.74V No 431 t R CS eco RL mm G en de d Vin Vref Figure 9. Single-Supply Comparator with Temperature-Compensated Threshold TS Figure 10. Constant Current Sink Figure 11.
PAGE 7
TS431 Taiwan Semiconductor TYPICAL PERFORMANCE CHARACTERISTICS Test Circuit for Voltage Amplification TS No 431 t R CS eco RL mm G en de d Figure 12. Small-Signal Voltage Gain and Phase Shirt vs. Frequency Test Circuit for Reference Impedance Figure 13. Reference Impedance vs. Frequency Test Circuit for Pulse Response, Ik=1mA Figure 14.
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TS431 Taiwan Semiconductor TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUE) The areas under the curves represent conditions that No 431 t R CS eco RL mm G en de d may cause the device to oscillate. For curves B, C, and D, R2 and V+ were adjusted to establish the initial VKA and IKA conditions with CL=0. VBATT and CL then were Test Circuit for Curve B, C and D adjusted to determine the ranges of stability. TS Figure 15. Reference Impedance vs.
PAGE 9
TS431 Taiwan Semiconductor CHARACTERISTICS CURVES (TC = 25°C unless otherwise noted) Figure 17. Reference Current vs. Temperature TS No 431 t R CS eco RL mm G en de d Figure 16. Reference Voltage vs. Temperature Figure 18. Cathode Current vs.
PAGE 10
TS431 Taiwan Semiconductor PACKAGE OUTLINE DIMENSIONS (Unit: Millimeters) No 431 t R CS eco RL mm G en de d SOT-23 TS SUGGESTED PAD LAYOUT (Unit: Millimeters) MARKING DIAGRAM 1 = Device Code X = Tolerance Code (A = ±1%, B = ±0.
PAGE 11
TS431 Taiwan Semiconductor PACKAGE OUTLINE DIMENSIONS (Unit: Millimeters) No 431 t R CS eco RL mm G en de d SOP-8 TS SUGGESTED PAD LAYOUT (Unit: Millimeters) MARKING DIAGRAM 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 Document Number: DS_P0000235 11 Version: H15
PAGE 12
TS431 Taiwan Semiconductor PACKAGE OUTLINE DIMENSIONS (Unit: Millimeters) No 431 t R CS eco RL mm G en de d TO-92 PACKAGE OUTLINE DIMENSIONS (Unit: Millimeters) TS TO-92 AMMO PACK MARKING DIAGRAM X = Tolerance Code (A = ±1%, B = ±0.
PAGE 13
TS431 TS No 431 t R CS eco RL mm G en de d Taiwan Semiconductor Notice 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.