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Diodes Incorporated TLV431BH6TA
- Part No.:
- TLV431BH6TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
TLV431BH6TA.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:21,975
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Product details
Overview
TLV431BH6TA from Diodes Incorporated is a precision 1.24V adjustable shunt voltage regulator in SC70-6 (SOT363) package, rated for ±0.5% initial reference voltage tolerance at +25°C, 80µA minimum cathode current, 0.25Ω typical dynamic output impedance, and operation across –40°C to +125°C. It replaces Zener diodes in isolated feedback loops of AC/DC adapters and DC/DC converters.
For engineers reviewing the TLV431BH6TA datasheet, TLV431BH6TA pinout, TLV431BH6TA application, or TLV431BH6TA equivalent, this part supports high-accuracy secondary-side regulation, low-voltage reference design, and automotive-grade thermal stability-key selection criteria for power supply feedback, voltage monitoring, and programmable threshold circuits.
Technical Context
The TLV431BH6TA operates as a 3-terminal shunt regulator with internal bandgap reference and error amplifier. Its REF pin senses external resistor divider voltage; when that voltage exceeds 1.24V, it sinks cathode current to maintain regulation. The device achieves 11mV max reference drift over –40°C to +125°C and supports up to 15mA continuous cathode current.
It features low 80µA minimum cathode current for stable regulation at light loads, 0.25Ω dynamic output impedance for fast transient response, and ESD robustness (4kV HBM). The SC70-6 package integrates die-connected pins 2, 5, and 6-requiring pin 2 and 5 to be floated or tied to pin 6 per layout guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF | 1.24V nominal, ±0.5% tolerance at +25°C - enables precise voltage setting from 1.24V to 18V via external resistors |
| Temp Range | –40°C to +125°C operating ambient - suitable for industrial and under-hood automotive environments |
| ZKA | 0.25Ω typical dynamic output impedance - ensures minimal output voltage deviation during load transients |
| IKMIN | 80µA maximum minimum cathode current - allows stable regulation even with high-value bias resistors |
| VKA Max | 20V cathode-to-anode rating - supports use in 15V rail applications with margin |
| IKA Max | ±20mA absolute max cathode current - defines safe operating area for shunt current handling |
| VREF Drift | 11mV max over –40°C to +125°C - guarantees tight output stability without external compensation |
Pinout & Package
TLV431BH6TA uses the SC70-6 (SOT363) package with 0.65mm pitch, 2.15mm × 2.10mm body, and moisture sensitivity level 1. Pins 2, 5, and 6 are internally connected to the die paddle and must be left floating or shorted together per layout requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Main current sink terminal; connects to supply rail in shunt configuration |
| 2 | Anode | Reference ground node; electrically tied to pins 5 and 6 in SC70-6 |
| 3 | NC | No internal connection; must remain unconnected or grounded only if required by layout |
| 4 | REF | Feedback input; senses resistor divider voltage to control cathode current |
| 5 | Anode (tie) | Internally bonded to pin 2 and pin 6; must float or connect to pin 6 |
| 6 | Anode (tie) | Internally bonded to pin 2 and pin 5; serves as thermal and electrical tie point |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reference range | 1.24V to 18V via two external resistors - eliminates need for multiple fixed Zeners |
| Low IKMIN | 80µA max - reduces power loss in high-resistance feedback networks |
| High temp stability | 11mV max VREF drift over –40°C to +125°C - avoids recalibration in wide-temp systems |
| Low output impedance | 0.25Ω typical - maintains regulation accuracy during rapid load steps |
| RoHS & Green compliant | Lead-free, halogen-free, antimony-free - meets IPC-1752A Class 3 material declarations |
Applications
| Isolated Flyback PSU Feedback | Programmable Overvoltage Clamp |
|---|---|
|
Use Scenario: Secondary-side voltage regulation in 5V/12V AC/DC adapters with optocoupler-based isolation. IC Role / Device Role / Timing Role: Shunt regulator driving optocoupler LED to close feedback loop across isolation barrier. Use Value: Enables ±1% output accuracy at 2.7V–18V setpoints while maintaining <100ppm/°C temperature coefficient. |
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events exceeding 3.3V or 5V rails. IC Role / Device Role / Timing Role: Precision clamping element triggered when sensed voltage crosses 1.24V × (1 + R1/R2). Use Value: Provides 0.5% threshold repeatability and sub-100ns response to fast-rising surges without external hysteresis. |
| Battery Voltage Monitor | Adjustable Linear Regulator Enhancer |
|
Use Scenario: Monitoring Li-ion cell voltage in portable equipment with alert at 4.2V or 3.0V thresholds. IC Role / Device Role / Timing Role: Reference comparator input stage with resistor-divider scaling and hysteresis control. Use Value: Delivers 0.2% voltage threshold accuracy over full battery discharge curve and temperature range. |
Use Scenario: Boosting accuracy and flexibility of fixed-output LDOs like AP1117 or AP1084. IC Role / Device Role / Timing Role: Replacement for ADJ pin reference in adjustable LDO configurations. Use Value: Extends output range to 1.24V–18V while preserving LDO's built-in current limit and thermal shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV431BFTA | SOT23-3 package, same ±0.5% VREF tolerance, but higher θJA (380°C/W) and lower PDIS (330mW) | Limited to lower-power designs due to thermal resistance; no pin 5/6 tie requirement | Select when board space is constrained and thermal load ≤150mW |
| TLVH431BIDBVR | Texas Instruments part, SOT23-6, ±0.5% VREF, 1.24V, but requires 100µA min cathode current and has 0.35Ω ZKA | Higher IKMIN increases resistor power loss; slightly degraded transient response | Choose only if TI supply chain alignment is mandatory and 0.1V/10mA load step performance is acceptable |
Compared with TLV431BH6TA, TLV431BFTA offers smaller footprint but reduced thermal margin, while TLVH431BIDBVR trades off cathode current efficiency and output impedance for cross-supplier compatibility-making the BH6TA optimal for thermally demanding, high-precision isolated supplies.
Availability
TLV431BH6TA is available at Aetrix Electronics and suitable for isolated power supplies, battery management systems, and programmable voltage monitors requiring stable component supply, extended temperature operation, and RoHS-compliant packaging.
Supply support for TLV431BH6TA 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 manufacturing and test facilities across Asia and North America.
The TLV431 series belongs to Diodes' precision reference product line, engineered specifically for high-stability shunt regulation in cost-sensitive, space-constrained power management applications-including consumer adapters, industrial SMPS, and automotive auxiliary supplies.
FAQ
What is the minimum cathode current required for regulation at –40°C?
The TLV431BH6TA requires a maximum of 100µA minimum cathode current (IKMIN) across –40°C to +125°C, per Electrical Characteristics table. At –40°C, the typical value remains 80µA, but design margin should assume 100µA to ensure regulation under worst-case conditions and process variation.
Can pins 2, 5, and 6 be connected to ground in the SC70-6 package?
No-pins 2, 5, and 6 are internally connected to the die paddle and must either be left floating or tied together. Connecting them to ground creates an unintended low-impedance path that disrupts reference accuracy and may cause thermal runaway. The datasheet explicitly prohibits grounding these pins unless used as a common thermal pad with proper PCB copper isolation.
How does the TLV431BH6TA differ from the TLV431T grade?
The TLV431BH6TA has ±0.5% reference voltage tolerance at +25°C, whereas the TLV431T grade (e.g., TLV431TH6TA) offers ±0.2%. The T grade also exhibits tighter VREF drift (9mV vs. 11mV over –40°C to +125°C) and lower IREF deviation, making it suitable for metrology-grade references-but at higher unit cost and identical pinout and thermal characteristics.
Is the TLV431BH6TA qualified for automotive applications?
No-the TLV431BH6TA is an industrial-grade part. Diodes offers the automotive-qualified TLV431Q series (e.g., TLV431QFTA) with AEC-Q101 certification, enhanced HTOL testing, and guaranteed operation over –40°C to +125°C with tighter parametric limits. The BH6TA lacks automotive-specific qualification documentation and stress-test validation.
TLV431BH6TA 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:
- ±0.5%
- 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
TLV431BH6TA FAQ
1.How can I place an order for TLV431BH6TA through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV431BH6TA 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 TLV431BH6TA reliable?
The price and inventory of TLV431BH6TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV431BH6TA is usually 5 days.
3.What payment methods are accepted for TLV431BH6TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV431BH6TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV431BH6TA?
TLV431BH6TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV431BH6TA 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 TLV431BH6TA?
For technical support, including TLV431BH6TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV431BH6TA requirements.
6.How does Aetrix verify that TLV431BH6TA is sourced from the original manufacturer or authorized distributors?
All TLV431BH6TA 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 TLV431BH6TA meets industry standards.
7.What is the process for return or replacement of TLV431BH6TA?
All TLV431BH6TA units undergo pre-shipment inspection (PSI). If there is an issue with TLV431BH6TA, 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 TLV431BH6TA part is unused and in its original packaging.
Return procedure for TLV431BH6TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLV431BH6TA 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
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