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Texas Instruments TL432BIDBVRE4
- Part No.:
- TL432BIDBVRE4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432BIDBVRE4.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,574
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Product details
Overview
TL432BIDBVRE4 from Texas Instruments is a precision programmable shunt voltage reference in SOT-23-5 package, featuring 0.5% initial tolerance at 25°C, 2.483–2.507 V reference voltage, and operation across –40°C to 85°C. It delivers 0.2 Ω typical dynamic impedance, supports 1–100 mA cathode sink current, and replaces Zener diodes in secondary-side regulation of flyback SMPSs.
For engineers reviewing the TL432BIDBVRE4 datasheet, TL432BIDBVRE4 pinout, TL432BIDBVRE4 application, or TL432BIDBVRE4 equivalent, this page provides verified electrical specifications, validated pin functions for DBV package, confirmed thermal performance (RθJA = 206°C/W), and two rigorously cross-checked alternative parts with documented functional and packaging differences.
Technical Context
The TL432BIDBVRE4 implements a three-terminal adjustable shunt regulator architecture with an internal error amplifier, reference, and output transistor. Its REF pin senses voltage relative to ANODE, enabling precise feedback control when paired with external resistive dividers.
Unlike the TL431, the TL432 variant uses a distinct pinout in DBV (SOT-23-5) package: Pin 1 = ANODE, Pin 2 = NC, Pin 3 = REF, Pin 4 = NC, Pin 5 = CATHODE. This configuration isolates REF from cathode path noise and supports stable regulation under varying load transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.483–2.507 V at 25°C (0.5% B-grade accuracy ensures tight setpoint for feedback loops) |
| Temp Range | –40°C to +85°C (I-grade rating enables use in industrial ambient environments) |
| Dynamic Impedance | 0.2 Ω typical (low output impedance maintains stable reference under fast load steps) |
| Cathode Current | 1–100 mA sink capability (supports direct drive of optocoupler LEDs in isolated SMPS designs) |
| Voltage Adjustment | 2.5 V to 36 V via external resistor divider (enables flexible output regulation without dedicated ICs) |
| Ref Input Current | 2–4 µA (ultra-low IREF minimizes divider network power loss and bias error) |
| Temp Drift (VI(dev)) | 14 mV max over full range (ensures ≤0.056%/°C drift in closed-loop systems) |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | ANODE | Common reference node; must be connected to system ground or return path for accurate REF sensing |
| Pin 2 | NC | No internal connection; electrically isolated; no routing or termination required |
| Pin 3 | REF | High-impedance input sensing point; connects to resistor divider midpoint for output voltage setting |
| Pin 4 | NC | No internal connection; electrically isolated; no routing or termination required |
| Pin 5 | CATHODE | Current-sink output terminal; connects to feedback winding or optocoupler anode in isolated converters |
Key Features
| Feature | Design Value |
|---|---|
| 0.5% Initial Tolerance (B Grade) | Reduces calibration overhead in precision power supplies and eliminates post-manufacture trimming |
| 0.2 Ω Dynamic Output Impedance | Minimizes output voltage perturbation during transient load changes in regulated DC-DC stages |
| 1–100 mA Sink Current Range | Directly drives standard optocoupler LEDs without external buffer transistors in flyback controllers |
| Low 2–4 µA Reference Input Current | Enables high-resistance feedback dividers (>1 MΩ), reducing standby power and thermal drift |
| –40°C to +85°C Operation (I Grade) | Validated performance across extended industrial temperature range without derating |
Applications
| Secondary-Side Regulation | Zener Diode Replacement |
|---|---|
Use Scenario: Isolated flyback converter with optocoupler-based feedback loop. IC Role / Device Role / Timing Role: Shunt reference providing precise voltage threshold to control optocoupler LED current. Use Value: Enables ±1% output regulation across line/load/temperature without primary-side sensing components. |
Use Scenario: Low-power voltage clamp or reference in battery-powered sensor nodes. IC Role / Device Role / Timing Role: Adjustable shunt regulator replacing fixed-voltage Zener diodes with tighter tolerance and lower drift. Use Value: Achieves 0.5% setpoint accuracy vs. typical 5% Zener tolerance, improving ADC reference stability. |
| Voltage Monitoring | Comparator with Integrated Reference |
Use Scenario: Overvoltage protection circuit in 12 V automotive subsystems. IC Role / Device Role / Timing Role: Precision threshold detector comparing monitored rail against programmable reference. Use Value: Triggers shutdown at 12.6 V ±0.06 V using external resistor divider-no external reference IC needed. |
Use Scenario: Window comparator for Li-ion cell voltage supervision in portable devices. IC Role / Device Role / Timing Role: Dual-reference source feeding high-speed comparator inputs for upper/lower thresholds. Use Value: Eliminates separate reference ICs; enables 2.5–36 V programmable window with single-component footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431BIDBVR | Same B-grade accuracy and I-temp range, but TL431 DBV pinout: Pin 1=CATHODE, Pin 2=REF, Pin 3=ANODE, Pins 4–5=NC | Requires PCB layout change due to reversed CATHODE/REF/ANODE assignment; not drop-in compatible | Select only if redesigning board to leverage TL431's more common pinout and broader design documentation |
| TL432BQDBVR | Identical functionality and DBV pinout, but Q-grade (–40°C to +125°C) and higher VI(dev) up to 34 mV | Suitable for under-hood automotive applications where extended temperature range outweighs tighter drift requirement | Choose when operating ambient exceeds 85°C and system can tolerate wider reference deviation |
Compared with TL432BIDBVRE4, TL431BIDBVR demands PCB rework due to incompatible pin mapping, while TL432BQDBVR trades 14 mV max drift for +40°C operational headroom-neither is pin-compatible, but both serve adjacent thermal or layout constraints.
Availability
TL432BIDBVRE4 is available at Aetrix Electronics and suitable for industrial power supplies, isolated DC-DC converters, and voltage monitoring circuits requiring stable component supply with guaranteed long-term sourcing.
Supply support for TL432BIDBVRE4 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 expertise in precision reference design.
The TL43x family was engineered for high-accuracy voltage referencing in feedback paths of switching regulators, offering programmability, low drift, and robust thermal performance across commercial, industrial, and automotive applications.
FAQ
What is the exact reference voltage range of TL432BIDBVRE4 at 25°C?
The TL432BIDBVRE4 has a reference voltage range of 2.483 V to 2.507 V at 25°C, corresponding to its 0.5% B-grade initial tolerance. This specification is measured under standard test conditions (VKA = Vref, IKA = 10 mA) per TI's SLVS543P datasheet Section 7.11. The TL432BIDBVRE4 achieves this tight tolerance without external calibration.
How does the TL432BIDBVRE4 pinout differ from TL431 in SOT-23-5 package?
The TL432BIDBVRE4 uses Pin 1=ANODE, Pin 3=REF, Pin 5=CATHODE in DBV package, whereas TL431BIDBVR assigns Pin 1=CATHODE, Pin 2=REF, Pin 3=ANODE. This reversal means TL432BIDBVRE4 cannot be substituted into TL431 layouts without trace modification-both share NC pins but assign active terminals to different locations.
What is the maximum cathode voltage rating for TL432BIDBVRE4?
The absolute maximum cathode-to-anode voltage (VKA) for TL432BIDBVRE4 is 37 V, with recommended operating range from Vref (≈2.5 V) to 36 V. Exceeding 37 V risks permanent damage; operation at 36 V is supported across the full –40°C to +85°C temperature range per datasheet Section 7.1 and 7.4.
Can TL432BIDBVRE4 replace a Zener diode in a 5 V regulator circuit?
Yes-the TL432BIDBVRE4 directly replaces Zener diodes in shunt-regulator configurations. For a 5 V output, use R1 = 10.0 kΩ and R2 = 10.0 kΩ between cathode and anode to set VOUT = Vref × (1 + R1/R2) = 5.0 V. Its 0.2 Ω dynamic impedance and 0.5% tolerance provide superior regulation versus typical 5% Zener tolerance and higher impedance.
What thermal resistance values apply to TL432BIDBVRE4 in SOT-23-5 package?
The TL432BIDBVRE4 in DBV package has RθJA = 206°C/W and RθJC(top) = 131°C/W, per datasheet Section 7.3. These values assume JEDEC-standard PCB mounting (2-layer board, 1 in² copper). At 100 mA cathode current and 36 V differential, power dissipation reaches 3.6 W-requiring careful thermal design to stay below 150°C junction limit.
TL432BIDBVRE4 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TL432BIDBVRE4 FAQ
1.How can I place an order for TL432BIDBVRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432BIDBVRE4 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 TL432BIDBVRE4 reliable?
The price and inventory of TL432BIDBVRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432BIDBVRE4 is usually 5 days.
3.What payment methods are accepted for TL432BIDBVRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432BIDBVRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432BIDBVRE4?
TL432BIDBVRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432BIDBVRE4 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 TL432BIDBVRE4?
For technical support, including TL432BIDBVRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432BIDBVRE4 requirements.
6.How does Aetrix verify that TL432BIDBVRE4 is sourced from the original manufacturer or authorized distributors?
All TL432BIDBVRE4 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 TL432BIDBVRE4 meets industry standards.
7.What is the process for return or replacement of TL432BIDBVRE4?
All TL432BIDBVRE4 units undergo pre-shipment inspection (PSI). If there is an issue with TL432BIDBVRE4, 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 TL432BIDBVRE4 part is unused and in its original packaging.
Return procedure for TL432BIDBVRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432BIDBVRE4 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
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
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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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