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Texas Instruments TL432BIDBVR
- Part No.:
- TL432BIDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432BIDBVR.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,556
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Product details
Overview
TL432BIDBVR 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 85°C. It delivers 1–100 mA sink-current capability with 0.2 Ω typical dynamic impedance and supports adjustable output from 2.5 V to 36 V using two external resistors-commonly deployed in secondary-side regulation of flyback SMPSs.
For engineers reviewing the TL432BIDBVR datasheet, TL432BIDBVR pinout, TL432BIDBVR application, or TL432BIDBVR equivalent, key selection considerations include its B-grade accuracy, I-temp grade temperature range, SOT-23-3 footprint compatibility, and distinct cathode–ref–anode pinout versus TL431 variants.
Technical Context
The TL432BIDBVR implements a three-terminal adjustable shunt regulator architecture with an internal precision reference amplifier and NPN output stage. Its sharp turn-on characteristic and low 0.2 Ω dynamic impedance enable stable closed-loop feedback in voltage-sensing applications.
Unlike the TL431, the TL432BIDBVR uses a dedicated cathode–ref–anode pinout (Pin 1 = Cathode, Pin 2 = Ref, Pin 3 = Anode) in the DBZ (SOT-23-3) package-making it functionally identical but not pin-compatible with TL431DBZR. It is rated for 37 V maximum cathode-anode voltage and supports 0.4–1 mA minimum regulation current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.483–2.507 V at 25°C (B-grade, ±0.5% tolerance) |
| Temp Range | –40°C to +85°C (I-grade, suitable for industrial environments) |
| Dynamic Impedance | 0.2 Ω typical - ensures minimal output voltage shift under load transients |
| Sink Current Range | 1–100 mA - supports direct error amplification in SMPS feedback loops |
| VKA Max | 37 V - enables use in high-voltage auxiliary rails up to 36 V output setting |
| IREF | 2–4 µA - ultra-low reference input current reduces divider network power loss |
| VI(dev) | 14–34 mV over full temp range - quantifies worst-case reference drift in I-grade operation |
Pinout & Package
SOT-23-3 (DBZ) package: 2.90 mm × 1.30 mm body, gull-wing leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Shunt current input / voltage sense node | Connects to regulated output rail; sinks current to maintain reference threshold at Pin 2 |
| Pin 2 (Ref) | Reference input threshold | Internal 2.5 V comparator input; tied to resistor divider midpoint for output voltage programming |
| Pin 3 (Anode) | Common return / ground reference | Typically connected to system ground or low-side return path; defines voltage reference point for all internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| 0.5% Initial Accuracy | B-grade tolerance enables tight output regulation without post-manufacturing trimming |
| Low Dynamic Impedance | 0.2 Ω typical ensures <1 mV output shift under 10 mA load step - critical for stable feedback |
| Wide Sink-Current Range | 1–100 mA operation allows direct interface with optocoupler LEDs or error amplifier inputs |
| Adjustable Output Range | 2.5 V to 36 V via external resistors - replaces discrete Zener diodes across multiple voltage rails |
| Industrial Temp Grade | –40°C to +85°C rating supports deployment in motor drives, PLCs, and industrial power supplies |
Applications
| Switching Power Supply Feedback | Zener Diode Replacement |
|---|---|
Use Scenario: Secondary-side voltage sensing in isolated flyback converters with optocoupler-based feedback loop. IC Role / Device Role / Timing Role: Shunt reference providing precise 2.5 V threshold to control optocoupler LED current and regulate primary-side PWM duty cycle. Use Value: Enables ±1% output voltage regulation over line/load/temperature with no external op-amp required. | Use Scenario: Precision voltage clamping or threshold detection in analog front-ends and protection circuits. IC Role / Device Role / Timing Role: Adjustable shunt regulator replacing fixed-voltage Zeners where tighter tolerance or programmability is needed. Use Value: Eliminates need for multiple Zener part numbers; single TL432BIDBVR supports 2.5–36 V via resistor selection. |
| Voltage Monitoring System | Programmable Current Source |
Use Scenario: Undervoltage lockout (UVLO) or overvoltage detection in battery-powered systems and DC-DC modules. IC Role / Device Role / Timing Role: Reference element in comparator-based monitoring circuit, comparing sensed rail against programmed threshold. Use Value: 0.5% accuracy ensures reliable trip points; low IREF (<4 µA) minimizes quiescent current impact. | Use Scenario: Constant-current biasing for sensors, LEDs, or transducer excitation in industrial instrumentation. IC Role / Device Role / Timing Role: Shunt-regulated current sink configured with fixed resistor between cathode and supply rail. Use Value: Delivers stable current independent of supply variation - e.g., 10 mA ±0.5% from 5–24 V input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431BIDBVR | Different pinout (Ref–Anode–Cathode vs. Cathode–Ref–Anode); same electrical specs and B/I-grade ratings | Requires PCB layout change; not drop-in compatible due to reversed pin assignment | Select TL431BIDBVR only when redesigning for TL431 footprint compatibility |
| TL432ACDBVR | 1% initial tolerance (A-grade), otherwise identical pinout, temp range, and dynamic impedance | Acceptable where ±1% output regulation suffices; lower cost than B-grade | Choose TL432ACDBVR for cost-sensitive industrial designs where 0.5% is not mandatory |
Compared with TL432BIDBVR, TL431BIDBVR demands board-level rework for pin mapping, while TL432ACDBVR trades 0.5% accuracy for cost reduction-neither offers pin-to-pin replacement without design revision.
Availability
TL432BIDBVR is available at Aetrix Electronics and suitable for industrial power supplies, isolated DC-DC converters, and voltage monitoring systems requiring stable component supply with guaranteed long-term sourcing.
Supply support for TL432BIDBVR 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 specializing in analog and embedded processing technologies, with leadership in precision analog ICs and power management solutions.
The TL43x family was designed specifically for high-accuracy, low-drift voltage referencing in feedback-critical applications such as switching regulators, voltage monitors, and programmable current sources.
FAQ
What is the reference voltage tolerance of TL432BIDBVR at 25°C?
The TL432BIDBVR has a reference voltage tolerance of ±0.5% at 25°C, corresponding to a 2.483 V to 2.507 V range. This B-grade accuracy is specified in the Electrical Characteristics table for TL432BI devices and confirmed across all test conditions with IKA = 10 mA and VKA = Vref.
How does the TL432BIDBVR pinout differ from TL431 variants?
The TL432BIDBVR uses a Cathode–Ref–Anode pinout (Pin 1 = Cathode, Pin 2 = Ref, Pin 3 = Anode) in the SOT-23-3 (DBZ) package. In contrast, TL431DBZR uses Ref–Anode–Cathode. This difference prevents direct PCB substitution without layout modification, though electrical functionality remains identical.
What is the operating temperature range for TL432BIDBVR?
The TL432BIDBVR is rated for operation from –40°C to +85°C, designated as the I-grade temperature range. This specification is explicitly stated in the Device Comparison Table and validated across all electrical characteristics tables for TL432BI and TL432BQ variants.
Can TL432BIDBVR replace a Zener diode in voltage regulation circuits?
Yes, TL432BIDBVR serves as a precision programmable replacement for Zener diodes. With adjustable output from 2.5 V to 36 V, 0.5% tolerance, and 0.2 Ω dynamic impedance, it provides superior stability and accuracy compared to standard Zeners-especially in feedback paths of switching regulators.
What is the minimum cathode current required for regulation in TL432BIDBVR?
The TL432BIDBVR requires a minimum cathode current of 0.4–0.7 mA to maintain regulation, as specified in the Electrical Characteristics tables for TL432BI devices. This Imin value ensures stable reference behavior and must be met by the external resistor network in all operating conditions.
TL432BIDBVR 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
TL432BIDBVR FAQ
1.How can I place an order for TL432BIDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432BIDBVR 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 TL432BIDBVR reliable?
The price and inventory of TL432BIDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432BIDBVR is usually 5 days.
3.What payment methods are accepted for TL432BIDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432BIDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432BIDBVR?
TL432BIDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432BIDBVR 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 TL432BIDBVR?
For technical support, including TL432BIDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432BIDBVR requirements.
6.How does Aetrix verify that TL432BIDBVR is sourced from the original manufacturer or authorized distributors?
All TL432BIDBVR 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 TL432BIDBVR meets industry standards.
7.What is the process for return or replacement of TL432BIDBVR?
All TL432BIDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TL432BIDBVR, 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 TL432BIDBVR part is unused and in its original packaging.
Return procedure for TL432BIDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432BIDBVR Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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