My Inquiry
My Account
Diodes Incorporated TLV431AH6TA
- Part No.:
- TLV431AH6TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
TLV431AH6TA.pdf
- Description:
- IC VREF SHUNT ADJ 1% SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:6,462
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLV431AH6TA from Diodes Incorporated is a precision 1.24V adjustable shunt voltage regulator in SC70-6 (SOT363) package, rated for ±1% initial reference tolerance at +25°C, -40°C to +125°C operating temperature, and 20mA max cathode current. It replaces Zener diodes in feedback loops of isolated DC-DC converters, linear regulators, and voltage monitoring circuits where stable low-voltage reference and low output impedance (0.25Ω typ.) are required.
For engineers reviewing the TLV431AH6TA datasheet, TLV431AH6TA pinout, TLV431AH6TA application, or TLV431AH6TA equivalent, this part supports design of secondary-side regulation in flyback PSUs, programmable voltage references, overvoltage protection thresholds, and precision current sources - with attention to cathode voltage range (1.24V–18V), minimum cathode current (55–100µA), and thermal derating in SOT363.
Technical Context
The TLV431AH6TA operates as a 3-terminal shunt regulator: its REF pin senses voltage via external resistor divider; when REF exceeds 1.24V, it sinks cathode current to clamp the regulated node. Its internal bandgap reference and error amplifier deliver stable output despite supply and load variation.
It functions within a cathode-anode voltage range of 1.24V to 20V, supports continuous cathode current from –20mA to +20mA, and maintains reference accuracy across –40°C to +125°C ambient with ≤11mV total drift over full temperature range. Dynamic output impedance remains ≤0.4Ω below 1kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF | 1.24V nominal, ±1% at +25°C - sets precise regulation threshold for feedback networks |
| VKA Range | 1.24V to 18V - enables adjustable output voltage using two external resistors |
| IK(min) | 55–100µA over –40°C to +125°C - minimum cathode current needed to maintain regulation |
| ZKA | 0.25Ω typical, ≤0.4Ω - low dynamic output impedance ensures stable loop response in feedback applications |
| Temp Drift | 11mV over –40°C to +125°C - defines worst-case reference deviation in automotive/industrial environments |
| IREF | 0.15–0.5µA - ultra-low reference input current minimizes divider loading error |
| θJA | 380°C/W - thermal resistance of SC70-6 package informs power dissipation limits at PCB level |
Pinout & Package
TLV431AH6TA is housed in SC70-6 (SOT363) package: 1.8mm × 2.1mm × 0.9mm body, 0.65mm pitch, matte tin-plated leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Main current sink terminal; connects to regulated node or optocoupler LED anode |
| 2 | Anode | Reference ground return; electrically tied to pin 5 and 6 in SOT363 - must be left floating or connected to pin 5/6 |
| 3 | NC | No internal connection; no electrical function - may be left unconnected or used for mechanical anchoring |
| 4 | REF | Feedback input; senses divided output voltage - requires high-impedance divider to avoid loading error |
| 5 | Anode | Redundant anode terminal; internally bonded to pin 2 and 6 - must be tied to pin 2 or left floating per layout guidelines |
| 6 | Anode | Third anode terminal; same electrical node as pins 2 and 5 - provides additional solder joint reliability |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage reference | 1.24V VREF enables regulation down to ~2.7V in optocoupler-based isolated supplies |
| High temp stability | ≤11mV drift over –40°C to +125°C supports under-hood and industrial control applications |
| Low output impedance | 0.25Ω typical ZKA improves transient response and reduces noise coupling in feedback paths |
| Ultra-low IREF | 0.15–0.5µA reference current allows use of high-value resistors (>1MΩ) without accuracy loss |
| Lead-free & green | Fully RoHS 3 compliant, halogen- and antimony-free - meets IPC-1752A material declaration requirements |
Applications
| Isolated Flyback PSU Feedback | Precision Voltage Reference |
|---|---|
|
Use Scenario: Secondary-side voltage sensing in 5V/12V isolated DC-DC converters with optocoupler feedback to primary controller. IC Role / Device Role / Timing Role: Shunt regulator driving optocoupler LED; sets precise output voltage via R1/R2 divider on REF pin. Use Value: Enables <2.5% output regulation accuracy over line/load/temp, replacing discrete Zener + transistor solutions. |
Use Scenario: Generating stable 2.5V or 3.3V reference for ADCs, DACs, or comparators in data acquisition systems. IC Role / Device Role / Timing Role: Adjustable shunt reference source; configured with 1% metal-film resistors for <0.5% system-level accuracy. Use Value: Delivers lower drift and better PSRR than standard Zeners, with no external op-amp required. |
| Overvoltage Protection Threshold | Programmable Current Source |
|
Use Scenario: Monitoring battery or bus voltage in portable electronics to trigger shutdown before overvoltage damage. IC Role / Device Role / Timing Role: Comparator reference node; REF pin biased to trip point (e.g., 4.3V), cathode tied to enable/disable logic. Use Value: Provides sharp, temperature-stable threshold with <±11mV variation - eliminates need for trimming. |
Use Scenario: Biasing constant-current LED drivers or sensor excitation circuits requiring 1–10mA precision current. IC Role / Device Role / Timing Role: Shunt-controlled current sink; cathode connected to load, anode grounded, REF set by sense resistor. Use Value: Achieves <1% current accuracy over temperature using only one external resistor - no op-amp or MOSFET needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV431BFTA | 0.5% VREF tolerance, SOT23 package, θJA = 380°C/W, same pinout as TLV431AH6TA cathode/anode/REF but 3-pin vs 6-pin | Higher accuracy but larger footprint; lacks redundant anode pins - less suitable for high-reliability PCB layouts | Select when tighter initial tolerance is critical and board space permits SOT23; verify thermal margin at 15mA load |
| TLVH431ACDBVR | Texas Instruments part; 1.24V, ±1%, SOT23-6, 20V max VKA, 80µA IK(min), 0.35Ω ZKA | Same SC70-6 pin compatibility but different pin 2/5/6 connectivity - requires layout review for anode tie-down | Choose for TI-design ecosystems or dual-sourcing; confirm REF bias current compatibility (0.2µA typ.) with existing dividers |
Compared with TLV431AH6TA, TLV431BFTA offers improved accuracy but reduced thermal performance in high-density layouts, while TLVH431ACDBVR provides pin-compatible second sourcing with slightly higher output impedance - both require validation of anode routing and cathode current headroom in final design.
Availability
TLV431AH6TA is available at Aetrix Electronics and suitable for isolated power supply feedback, precision voltage reference generation, overvoltage protection circuits, and programmable current source designs requiring stable component supply across automotive, industrial, and telecom end equipment.
Supply support for TLV431AH6TA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal devices, with design centers in Asia, Europe, and the U.S., and manufacturing in China, Taiwan, and the Philippines.
The TLV431 series belongs to Diodes' precision reference and voltage regulation product line, engineered for cost-sensitive yet thermally demanding applications including AC-DC adapters, server PSUs, and industrial sensors - emphasizing accuracy, stability, and RoHS compliance.
FAQ
What is the maximum cathode-to-anode voltage for TLV431AH6TA?
The absolute maximum cathode-to-anode voltage (VKA) is 20V. Operation beyond this rating risks permanent device failure. The recommended operating range is VREF (1.24V) to 18V, ensuring reliable regulation while maintaining specified tolerance and drift performance across temperature.
Can TLV431AH6TA replace a standard Zener diode directly?
Yes - TLV431AH6TA can replace Zener diodes in most shunt regulation roles, but requires three connections (cathode, anode, REF) versus two for Zeners. External resistor divider on REF sets voltage; cathode sinks current like a Zener cathode. Layout must accommodate SC70-6 pinout and anode tie-down rules.
How does the SC70-6 package affect thermal performance?
The SC70-6 (SOT363) package has θJA = 380°C/W. At 15mA cathode current and 5V drop, power dissipation is 75mW, resulting in ~28.5°C junction rise above ambient. Adequate copper pour on anode pads (pins 2/5/6) is essential to manage thermal stress in continuous operation.
Is TLV431AH6TA suitable for automotive applications?
TLV431AH6TA is not AEC-Q200 qualified. For automotive use, Diodes offers the pin-compatible TLV431Q series (e.g., TLV431QH6TA), which undergoes extended temperature testing (–40°C to +125°C), HTOL, and ESD validation per automotive standards - TLV431AH6TA is intended for industrial and commercial systems only.
TLV431AH6TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.24V
- Voltage - Output (Max):
- 18 V
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 100 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
TLV431AH6TA FAQ
1.How can I place an order for TLV431AH6TA through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV431AH6TA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TLV431AH6TA reliable?
The price and inventory of TLV431AH6TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV431AH6TA is usually 5 days.
3.What payment methods are accepted for TLV431AH6TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV431AH6TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV431AH6TA?
TLV431AH6TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV431AH6TA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TLV431AH6TA?
For technical support, including TLV431AH6TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV431AH6TA requirements.
6.How does Aetrix verify that TLV431AH6TA is sourced from the original manufacturer or authorized distributors?
All TLV431AH6TA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLV431AH6TA meets industry standards.
7.What is the process for return or replacement of TLV431AH6TA?
All TLV431AH6TA units undergo pre-shipment inspection (PSI). If there is an issue with TLV431AH6TA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TLV431AH6TA part is unused and in its original packaging.
Return procedure for TLV431AH6TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLV431AH6TA Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
