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Texas Instruments TL432QDBVTE4
- Part No.:
- TL432QDBVTE4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432QDBVTE4.pdf
- Description:
- IC VREF SHUNT ADJ 2.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,748
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Product details
Overview
TL432QDBVTE4 from Texas Instruments is a precision programmable shunt voltage reference in SOT-23-5 package, delivering 2.495 V nominal reference voltage with ±0.5% initial tolerance (B grade), 14 mV max full-range temperature drift (–40°C to 125°C), and 0.2 Ω typical dynamic impedance. It operates as an adjustable shunt regulator in secondary-side feedback loops of automotive-grade flyback converters.
For engineers reviewing the TL432QDBVTE4 datasheet, TL432QDBVTE4 pinout, TL432QDBVTE4 application, or TL432QDBVTE4 equivalent, key selection criteria include its Q-temp automotive qualification (–40°C to 125°C), distinct DBV pinout versus TL431, sink-current capability up to 100 mA, and low 2–4 µA reference input current enabling high-impedance resistor networks.
Technical Context
The TL432QDBVTE4 implements a three-terminal adjustable shunt regulator architecture with internal error amplifier, reference, and output transistor. Its cathode-anode voltage range extends from Vref (≈2.495 V) to 36 V, supporting external resistor-based voltage setting across the full range.
Unlike the TL431, the TL432 variant uses a different pin assignment in SOT-23-5 (DBV): Pin 1 = NC, Pin 2 = ANODE, Pin 3 = NC, Pin 4 = REF, Pin 5 = CATHODE - enabling layout separation of reference sensing and power sinking paths in noise-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.495 V (typical at 25°C); sets precise threshold for feedback control loops |
| Initial Tolerance | ±0.5% (B grade); enables tight output regulation without trimming in automotive power supplies |
| Temp Range | –40°C to +125°C (Q grade); qualified for under-hood and engine-control module use |
| Dynamic Impedance | 0.2 Ω (typical); ensures stable regulation under fast load transients in SMPS feedback |
| Cathode Current | 1–100 mA sink capability; supports direct drive of optocoupler LEDs in isolated flyback designs |
| Ref Input Current | 2–4 µA (typical); permits high-value resistor dividers (>1 MΩ), reducing standby power loss |
| Temp Drift | 14 mV max over full range; maintains <0.012%/°C stability for accurate voltage monitoring |
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 | NC | No internal connection; must be left floating or grounded per layout best practice |
| Pin 2 | ANODE | Common reference node; tied to system ground or return path in shunt configuration |
| Pin 3 | NC | No internal connection; electrically isolated; avoid routing sensitive signals nearby |
| Pin 4 | REF | High-impedance input sensing node; connects to resistor divider midpoint for voltage setting |
| Pin 5 | CATHODE | Current-sinking output; drives optocoupler LED or error amplifier in isolated feedback paths |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Q-temp qualification | Guaranteed operation from –40°C to +125°C with full electrical specs validated per AEC-Q100 |
| Low reference input current | 2–4 µA typical enables >1 MΩ feedback resistors, cutting standby power by >50% vs. Zener alternatives |
| Sharp turn-on characteristic | Sub-100 mV transition bandwidth ensures clean switching between regulation states in comparator-mode use |
| 0.2 Ω dynamic impedance | Maintains <1 mV output variation under 10 mA load steps, critical for tight-tolerance SMPS regulation |
| Pinout differentiation from TL431 | Separates REF and CATHODE on opposite sides of DBV package, minimizing trace coupling in high-noise environments |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Isolated DC-DC Converter |
|---|---|
Use Scenario: Precision voltage monitoring of 12 V battery rail during cold-crank and load-dump events. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.495 V threshold for analog comparator triggering fault logic. Use Value: 14 mV max temp drift ensures consistent trip point across –40°C to 125°C ambient, eliminating calibration drift in ECU firmware. | Use Scenario: Secondary-side feedback regulation in 24 V input, 5 V/3 A isolated flyback supply for PLC I/O modules. IC Role / Device Role / Timing Role: Adjustable shunt regulator driving PC817 optocoupler LED to close feedback loop across isolation barrier. Use Value: 100 mA sink current directly drives optocoupler without external transistor, simplifying BOM and improving transient response. |
| Medical Infusion Pump Power Supply | Telecom Remote Radio Head (RRH) |
Use Scenario: Output voltage regulation in compact, low-noise 5 V/1 A flyback converter powering microcontroller and analog front-end. IC Role / Device Role / Timing Role: Programmable reference setting feedback divider ratio to achieve ±1% output accuracy over line/load/temp. Use Value: 0.5% initial tolerance and 0.2 Ω impedance enable <±1.5% total output error without post-production trimming. | Use Scenario: Bias voltage generation and overvoltage protection in outdoor 48 V DC-powered RRH power management subsystem. IC Role / Device Role / Timing Role: Zener diode replacement providing stable 3.3 V reference for ADC monitoring and supervisor IC reset thresholds. Use Value: Low 2–4 µA Iref reduces quiescent current in always-on monitoring circuits, extending backup runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431QDBVR | Same Q-temp rating and SOT-23-5 package, but TL431 pinout (Pin 1=CATHODE, Pin 4=REF); 0.5% tolerance identical | Requires PCB layout change due to reversed CATHODE/REF pins; unsuitable for drop-in replacement in TL432-designed boards | Select only when redesigning for TL431-compatible footprint or leveraging TI's TL431 ecosystem tooling |
| MAX6008AEUR+T | Fixed 2.5 V output (not adjustable), 0.2% initial accuracy, 20 ppm/°C tempco, SOT-23-3 package | Lacks adjustability and sink-current drive; used only where fixed reference suffices and space constraints favor 3-pin package | Choose for ultra-high-accuracy fixed references in space-constrained medical sensors-no resistor network needed |
Compared with TL431QDBVR, TL432QDBVTE4 offers native pinout compatibility for new designs requiring physical separation of REF and CATHODE traces; versus MAX6008AEUR+T, it trades fixed-accuracy simplicity for full 2.495–36 V adjustability and 100 mA drive-critical for isolated power feedback.
Availability
TL432QDBVTE4 is available at Aetrix Electronics and suitable for automotive power management, industrial isolated DC-DC converters, and medical infusion pump power supplies requiring stable component supply across extended temperature ranges.
Supply support for TL432QDBVTE4 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 designing analog ICs, embedded processors, and digital signal solutions for industrial, automotive, and communications markets.
The TL43x family was engineered as precision programmable shunt references targeting automotive-grade power supply feedback, voltage monitoring, and Zener replacement-emphasizing thermal stability, low drift, and robust sink-current drive.
FAQ
What is the exact pin configuration of TL432QDBVTE4 in the SOT-23-5 package?
TL432QDBVTE4 uses the TL432-specific SOT-23-5 (DBV) pinout: Pin 1 = NC, Pin 2 = ANODE, Pin 3 = NC, Pin 4 = REF, Pin 5 = CATHODE. This differs from TL431's DBV assignment (Pin 1 = CATHODE, Pin 4 = REF) and is confirmed in TI's SLVS543P datasheet Figure 4. The NC pins must remain unconnected to avoid parasitic coupling.
Does TL432QDBVTE4 support adjustable output voltages, and what is the range?
Yes, TL432QDBVTE4 supports fully adjustable output voltage from 2.495 V (its internal reference) up to 36 V using two external resistors in a divider network connected to the REF and ANODE terminals. The formula is VOUT = Vref × (1 + R1/R2), with R2 connected between REF and ANODE, and R1 between REF and CATHODE.
What is the maximum cathode current rating for TL432QDBVTE4, and how does it impact optocoupler drive?
TL432QDBVTE4 supports continuous cathode current from 1 mA to 100 mA. At 100 mA, it can directly drive standard optocouplers like PC817 (IF = 5–20 mA) without external transistors-enabling simplified, low-component-count feedback in isolated flyback converters while maintaining regulation stability.
How does the temperature drift specification of TL432QDBVTE4 compare across grades, and what is its value for the Q-grade device?
TL432QDBVTE4 is Q-grade, characterized for –40°C to +125°C operation. Its VI(dev) - deviation of reference voltage over full temperature range - is 14 mV maximum, as specified in Section 7.7 of the SLVS543P datasheet. This corresponds to ~0.011%/°C average drift, significantly tighter than standard-grade (2%) or A-grade (1%) variants at same temperature extremes.
Is TL432QDBVTE4 pin-compatible with TL431 devices in the same SOT-23-5 package?
No, TL432QDBVTE4 is not pin-compatible with TL431 devices in SOT-23-5. While both use DBV packaging, TL432 assigns Pin 4 to REF and Pin 5 to CATHODE, whereas TL431 uses Pin 1 for CATHODE and Pin 4 for REF. Interchanging them without PCB revision will result in incorrect biasing and functional failure.
TL432QDBVTE4 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
TL432QDBVTE4 FAQ
1.How can I place an order for TL432QDBVTE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432QDBVTE4 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 TL432QDBVTE4 reliable?
The price and inventory of TL432QDBVTE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432QDBVTE4 is usually 5 days.
3.What payment methods are accepted for TL432QDBVTE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432QDBVTE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432QDBVTE4?
TL432QDBVTE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432QDBVTE4 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 TL432QDBVTE4?
For technical support, including TL432QDBVTE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432QDBVTE4 requirements.
6.How does Aetrix verify that TL432QDBVTE4 is sourced from the original manufacturer or authorized distributors?
All TL432QDBVTE4 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 TL432QDBVTE4 meets industry standards.
7.What is the process for return or replacement of TL432QDBVTE4?
All TL432QDBVTE4 units undergo pre-shipment inspection (PSI). If there is an issue with TL432QDBVTE4, 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 TL432QDBVTE4 part is unused and in its original packaging.
Return procedure for TL432QDBVTE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432QDBVTE4 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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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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