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Texas Instruments TL432BQDBVR
- Part No.:
- TL432BQDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432BQDBVR.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,415
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Product details
Overview
TL432BQDBVR from Texas Instruments is a precision programmable shunt voltage reference in SOT-23-3 package, featuring 0.5% initial tolerance at 25°C, 2.483–2.507 V reference voltage, and operation across –40°C to 125°C. It delivers 0.2 Ω typical dynamic impedance, 1–100 mA sink-current capability, and 14 mV max reference voltage deviation over full temperature range - enabling high-accuracy secondary-side regulation in automotive-grade flyback SMPS.
For engineers reviewing the TL432BQDBVR datasheet, TL432BQDBVR pinout, TL432BQDBVR application, or TL432BQDBVR equivalent, this page provides verified electrical specifications, validated pin functions, confirmed automotive-temperature performance (Q-grade), and real-world implementation context for voltage monitoring, Zener replacement, and adjustable referencing in safety-critical power systems.
Technical Context
The TL432BQDBVR implements a three-terminal adjustable shunt regulator architecture with an internal error amplifier, reference, and output transistor - configured as a precision current sink referenced to its ANODE terminal. Its REF pin senses voltage relative to ANODE, triggering cathode current conduction when input exceeds Vref.
Unlike the TL431, the TL432BQDBVR uses a distinct SOT-23-3 pinout (CATHODE–REF–ANODE) and shares identical electrical specs but not pin compatibility. It operates with 2 µA typical reference input current and maintains <0.5 µA off-state cathode leakage at 36 V cathode-to-anode voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage (Vref) | 2.483–2.507 V at 25°C - enables precise 2.5 V system biasing with ±12 mV absolute accuracy |
| Initial Tolerance | ±0.5% at 25°C (B grade) - supports tight-loop feedback in automotive power supplies |
| Temp Range | –40°C to +125°C (Q grade) - qualified for under-hood and industrial control applications |
| Dynamic Impedance | 0.2 Ω typical - ensures stable regulation under fast load transients in SMPS feedback networks |
| Cathode Current Range | 1–100 mA - accommodates both low-power sensing and high-current shunt regulation |
| Ref Input Current | 2–4 µA - minimizes resistor-divider loading error in high-impedance voltage-setting networks |
| Vref Temp Drift | 14 mV max over full range - translates to ~11 ppm/°C drift, suitable for wide-temp instrumentation |
Pinout & Package
SOT-23-3 package (2.90 mm × 1.30 mm body), surface-mount, lead-free, RoHS-compliant. Pin 1 = CATHODE, Pin 2 = REF, Pin 3 = ANODE.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CATHODE (Pin 1) | Shunt current input node | Primary current path into device; connects to regulated rail or SMPS optocoupler LED anode |
| REF (Pin 2) | Reference threshold input | Senses voltage relative to ANODE; triggers conduction when VREF–ANODE ≥ Vref |
| ANODE (Pin 3) | Common return/reference ground | System ground reference point; all voltages defined relative to this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-Qualified Temp Range | –40°C to +125°C operation - meets AEC-Q100 stress test requirements for under-hood use |
| Low Dynamic Impedance | 0.2 Ω typical - reduces output voltage variation during 10–90% load steps in closed-loop regulation |
| Sharp Turn-On Characteristic | Sub-100 mV transition band - enables clean switching behavior vs. Zener diodes in comparator applications |
| Low Reference Input Current | 2–4 µA - allows use of >1 MΩ resistor dividers without significant Vref error contribution |
| Zener Replacement Capability | Adjustable 2.5–36 V output - eliminates need for multiple discrete Zener values in multi-rail designs |
Applications
| Secondary-Side Regulation | Zener Diode Replacement |
|---|---|
|
Use Scenario: Isolated flyback converter with optocoupler feedback loop. IC Role / Device Role / Timing Role: Shunt reference on secondary side, setting precise feedback voltage for TL432BQDBVR-driven optocoupler LED current. Use Value: Enables ±1% output voltage regulation across line/load/temp - critical for automotive infotainment power rails. |
Use Scenario: Precision voltage clamping in analog front-end protection circuits. IC Role / Device Role / Timing Role: Adjustable shunt clamp replacing fixed-voltage Zener diodes with tighter tolerance and lower temp drift. Use Value: Reduces clamping error from ±5% (Zener) to ±0.5%, improving ADC input protection accuracy in sensor signal chains. |
| Voltage Monitoring | Comparator with Integrated Reference |
|
Use Scenario: Overvoltage detection in 12 V battery management systems. IC Role / Device Role / Timing Role: Programmable threshold reference feeding comparator input to trigger shutdown at 13.8 V. Use Value: Eliminates external reference IC; achieves 13.8 V trip point with <±15 mV error over –40°C to 125°C. |
Use Scenario: Window comparator for microcontroller reset supervision. IC Role / Device Role / Timing Role: Dual TL432BQDBVR units set upper/lower thresholds; output drives logic gate or MCU reset pin. Use Value: Provides guaranteed 2.5 V reference for both thresholds - avoids mismatch errors inherent in separate references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431BQDBVR | Different pinout (REF–ANODE–CATHODE vs. CATHODE–REF–ANODE); identical electrical specs | Requires PCB layout revision due to non-pin-compatible footprint | Select only if existing design uses TL431 pinout and board rework is acceptable |
| TLVH431BQDBVR | Lower 1.24 V reference voltage; 0.5% tolerance; 30 V max cathode voltage; higher 10 µA Iref | Better suited for low-voltage (<5 V) rails; unsuitable for 12–24 V automotive monitoring | Prefer for sub-5 V systems where 1.24 V reference improves divider resolution and power efficiency |
Compared with TL431BQDBVR, TL432BQDBVR offers identical Q-grade performance but mandates layout change; versus TLVH431BQDBVR, it trades lower reference voltage for higher cathode voltage headroom and lower reference current - making TL432BQDBVR optimal for 5–36 V automotive and industrial regulation.
Availability
TL432BQDBVR is available at Aetrix Electronics and suitable for automotive power supplies, industrial SMPS designs, and battery management systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL432BQDBVR 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 leader specializing in analog, embedded processing, and power management technologies, with decades of automotive-grade product validation.
The TL43x family was designed specifically for precision voltage referencing in isolated power conversion, voltage supervision, and analog signal conditioning - targeting automotive, industrial, and telecom infrastructure applications.
FAQ
What is the maximum cathode-to-anode voltage rating for TL432BQDBVR?
The TL432BQDBVR has an absolute maximum cathode-to-anode voltage (VKA) of 37 V, with recommended operating range from Vref (≈2.5 V) up to 36 V. Exceeding 37 V risks permanent damage. This rating enables direct use in 24 V automotive systems and 36 V industrial rails without external clamping.
How does TL432BQDBVR differ from TL431BQDBVR in practical circuit design?
The TL432BQDBVR uses CATHODE–REF–ANODE pinout in SOT-23-3, while TL431BQDBVR uses REF–ANODE–CATHODE. Though electrically identical, this reversal requires PCB trace rerouting. TL432BQDBVR's pin order matches common optocoupler feedback layouts, reducing routing complexity in flyback designs.
Can TL432BQDBVR operate with less than 1 mA cathode current?
No - TL432BQDBVR requires minimum 0.4 mA cathode current (Imin) to maintain regulation. Below this, output voltage deviates significantly. For ultra-low-power applications, ensure external resistor network delivers ≥0.4 mA even at lowest operating voltage and temperature.
What is the reference input current (Iref) specification for TL432BQDBVR?
The TL432BQDBVR exhibits 2–4 µA typical reference input current at 25°C, with ≤2.5 µA deviation over –40°C to 125°C. This low Iref minimizes loading error in high-resistance feedback dividers, preserving accuracy in space-constrained designs.
Is TL432BQDBVR suitable for AEC-Q100 qualified automotive applications?
Yes - the "Q" suffix denotes qualification per AEC-Q100 Grade 1 (–40°C to +125°C), including HTOL, TC, and ESD testing. TL432BQDBVR is widely deployed in automotive body control modules, ADAS power supplies, and infotainment DC/DC converters.
TL432BQDBVR 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:
- ±0.5%
- 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
TL432BQDBVR FAQ
1.How can I place an order for TL432BQDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432BQDBVR 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 TL432BQDBVR reliable?
The price and inventory of TL432BQDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432BQDBVR is usually 5 days.
3.What payment methods are accepted for TL432BQDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432BQDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432BQDBVR?
TL432BQDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432BQDBVR 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 TL432BQDBVR?
For technical support, including TL432BQDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432BQDBVR requirements.
6.How does Aetrix verify that TL432BQDBVR is sourced from the original manufacturer or authorized distributors?
All TL432BQDBVR 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 TL432BQDBVR meets industry standards.
7.What is the process for return or replacement of TL432BQDBVR?
All TL432BQDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TL432BQDBVR, 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 TL432BQDBVR part is unused and in its original packaging.
Return procedure for TL432BQDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432BQDBVR Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
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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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