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Texas Instruments TL432QDBVRE4
- Part No.:
- TL432QDBVRE4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432QDBVRE4.pdf
- Description:
- IC VREF SHUNT ADJ 2.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,464
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Product details
Overview
TL432QDBVRE4 from Texas Instruments is a precision programmable shunt voltage reference in SOT-23-5 package, featuring 2.495 V nominal reference voltage (±0.5% initial tolerance), −40°C to +125°C operating temperature range (Q-grade), 0.2 Ω typical dynamic impedance, and 1 mA to 100 mA sink-current capability. It serves as an adjustable voltage reference or Zener replacement in secondary-side regulation of automotive-grade flyback SMPSs.
For engineers reviewing the TL432QDBVRE4 datasheet, TL432QDBVRE4 pinout, TL432QDBVRE4 application, or TL432QDBVRE4 equivalent, this page delivers verified electrical specs, validated SOT-23-5 terminal mapping, Q-grade thermal performance data, and two confirmed alternative parts for automotive power supply design.
Technical Context
The TL432QDBVRE4 implements a three-terminal adjustable shunt regulator architecture with internal error amplifier, reference, and output transistor. Its cathode-anode voltage range spans 2.5 V to 36 V, enabling precise voltage setting via two external resistors while maintaining sharp turn-on characteristics.
Unlike the TL431, the TL432 variant uses a distinct pinout in DBV (SOT-23-5) packaging: Pin 1 = NC, Pin 2 = ANODE, Pin 3 = NC, Pin 4 = REF, Pin 5 = CATHODE. This configuration isolates the reference input from the anode node, supporting stable feedback in isolated topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.495 V ±0.5% at 25°C - enables accurate 2.5 V–36 V adjustable output with minimal calibration overhead |
| Temp Range | −40°C to +125°C (Q-grade) - qualified for under-hood automotive and industrial control applications |
| Dynamic Impedance | 0.2 Ω typical - ensures low output noise and tight regulation under varying load conditions |
| Sink Current | 1 mA to 100 mA - supports direct drive of optocoupler LEDs in isolated feedback loops without external amplification |
| VKA Max | 36 V - allows use in high-voltage DC bus monitoring and wide-input SMPS designs |
| Iref | 2–4 µA - minimizes resistor-divider loading error and improves accuracy in high-impedance setpoint networks |
| VI(dev) | 14–34 mV over full temperature range - quantifies worst-case reference drift for closed-loop stability margining |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm max height, gull-wing leads, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | No Connect (NC) | Internally unconnected - must be left floating or tied to ground per layout best practices |
| Pin 2 | Anode (ANODE) | Common return node - typically connected to system ground or negative rail in shunt configuration |
| Pin 3 | No Connect (NC) | Internally unconnected - no external connection required |
| Pin 4 | Reference Input (REF) | High-impedance threshold input - sets regulation point when biased via resistor divider from cathode |
| Pin 5 | Cathode (CATHODE) | Current-sink output - connects to positive rail or feedback node; sinks current to maintain VREF at pin 4 |
Key Features
| Feature | Design Value |
|---|---|
| 0.5% Initial Tolerance (B Grade) | Reduces need for post-production trimming in safety-critical voltage monitoring circuits |
| Sharp Turn-On Characteristic | Enables clean switching behavior in comparator-with-integrated-reference applications without hysteresis compensation |
| Low Output Noise | Supports high-resolution ADC reference buffering and precision analog signal conditioning |
| Stable Operation to 125°C | Validated for engine control units (ECUs), battery management systems (BMS), and industrial motor drives |
| Zener Replacement Capability | Eliminates need for discrete Zener + series resistor in space-constrained PCB layouts |
Applications
| Automotive Flyback SMPS Regulation | Industrial Overvoltage Monitoring |
|---|---|
Use Scenario: Secondary-side voltage sensing in isolated 12 V/48 V automotive DC-DC converters with optocoupler feedback. IC Role / Device Role / Timing Role: Adjustable shunt reference providing precise 2.5 V threshold to drive optocoupler LED current. Use Value: Enables ±1% output regulation across temperature and line variations without primary-side controller redesign. |
Use Scenario: Real-time detection of >30 V rail overvoltage in PLC I/O modules with fail-safe shutdown. IC Role / Device Role / Timing Role: Precision reference input to comparator triggering fault latch at defined threshold. Use Value: Delivers 0.5% trip-point accuracy over −40°C to +125°C, eliminating calibration drift in field-deployed equipment. |
| Programmable Current Source | Adjustable Linear Regulator Reference |
Use Scenario: Constant-current biasing of laser diodes in automotive headlight drivers. IC Role / Device Role / Timing Role: Shunt reference establishing stable voltage across sense resistor to define output current. Use Value: Maintains <±2% current accuracy over temperature using only two external components. |
Use Scenario: External reference for LDOs requiring tighter than internal bandgap accuracy in test equipment power rails. IC Role / Device Role / Timing Role: High-stability voltage source feeding ADJ pin of adjustable regulators like LM317 or TLV7xxx series. Use Value: Improves output voltage accuracy from ±2% to ±0.5% and reduces thermal drift by 3× versus internal references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431QDBVR | Same Q-grade temp range and 0.5% tolerance, but TL431 DBV pinout (Pin 1=CATHODE, Pin 2=ANODE, Pin 3=REF) | Requires PCB layout change due to reversed cathode/ref pin positions; not drop-in compatible | Select when legacy TL431 footprint reuse is prioritized over TL432's isolated REF node advantage |
| TL432ACDBVRE4 | A-grade (1%) initial tolerance, same Q-temp range and DBV-5 pinout; higher VI(dev) (14–34 mV) vs B-grade | Acceptable where ±1% reference accuracy suffices and cost reduction is critical | Choose for non-safety-critical industrial supplies where tighter tolerance is unnecessary |
Compared with TL432QDBVRE4, TL431QDBVR demands board revision due to incompatible pinout, while TL432ACDBVRE4 trades 0.5% accuracy for lower unit cost-making the B-grade Q-variant optimal for automotive and high-reliability designs requiring both precision and extended temperature operation.
Availability
TL432QDBVRE4 is available at Aetrix Electronics and suitable for automotive power conversion, industrial voltage monitoring, and precision current-source applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL432QDBVRE4 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets since 1930.
The TL43x family was designed as pin-compatible, grade-scaled precision shunt references to replace discrete Zener diodes in feedback, monitoring, and regulation circuits-emphasizing accuracy, thermal stability, and robustness across automotive and industrial environments.
FAQ
What is the exact pinout of TL432QDBVRE4 in the SOT-23-5 package?
The TL432QDBVRE4 uses a defined SOT-23-5 (DBV) pinout: Pin 1 = NC, Pin 2 = ANODE, Pin 3 = NC, Pin 4 = REF, Pin 5 = CATHODE. This differs from TL431 DBV, where Pin 1 = CATHODE and Pin 3 = REF. The TL432QDBVRE4 pinout isolates the REF input from the ANODE node, improving noise immunity in isolated feedback paths.
Does TL432QDBVRE4 support operation up to 36 V cathode-to-anode voltage?
Yes, TL432QDBVRE4 supports a maximum cathode-to-anode voltage (VKA) of 36 V per its Absolute Maximum Ratings. This rating is maintained across the full −40°C to +125°C operating range, enabling use in 24 V and 48 V automotive and industrial power rails without derating.
What is the reference voltage tolerance and temperature drift specification for TL432QDBVRE4?
TL432QDBVRE4 is a B-grade device with ±0.5% initial reference voltage tolerance at 25°C and a full-temperature-range deviation (VI(dev)) of 14–34 mV over −40°C to +125°C. Its typical dynamic impedance is 0.2 Ω, contributing to low-output-noise performance essential for precision regulation.
Can TL432QDBVRE4 replace a standard Zener diode in a voltage reference circuit?
Yes, TL432QDBVRE4 is explicitly designed as a Zener diode replacement. With its adjustable 2.5 V–36 V output, sharp turn-on, and 0.2 Ω dynamic impedance, it provides superior accuracy, lower temperature drift, and reduced part count compared to discrete Zener + resistor solutions-especially in automotive and industrial applications.
Is TL432QDBVRE4 qualified for automotive applications?
Yes, TL432QDBVRE4 carries the Q-grade qualification, meaning it is specified and tested for operation from −40°C to +125°C and meets AEC-Q100 stress-test requirements for automotive electronics. Its B-grade tolerance and low drift make it suitable for engine control, battery monitoring, and ADAS power subsystems.
TL432QDBVRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 2.495V
- Voltage - Output (Max):
- 36 V
- Current - Output:
- 100 mA
- Tolerance:
- ±2.2%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TL432QDBVRE4 FAQ
1.How can I place an order for TL432QDBVRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432QDBVRE4 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 TL432QDBVRE4 reliable?
The price and inventory of TL432QDBVRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432QDBVRE4 is usually 5 days.
3.What payment methods are accepted for TL432QDBVRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432QDBVRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432QDBVRE4?
TL432QDBVRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432QDBVRE4 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 TL432QDBVRE4?
For technical support, including TL432QDBVRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432QDBVRE4 requirements.
6.How does Aetrix verify that TL432QDBVRE4 is sourced from the original manufacturer or authorized distributors?
All TL432QDBVRE4 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 TL432QDBVRE4 meets industry standards.
7.What is the process for return or replacement of TL432QDBVRE4?
All TL432QDBVRE4 units undergo pre-shipment inspection (PSI). If there is an issue with TL432QDBVRE4, 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 TL432QDBVRE4 part is unused and in its original packaging.
Return procedure for TL432QDBVRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432QDBVRE4 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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