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Texas Instruments TL432IDBVR
- Part No.:
- TL432IDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432IDBVR.pdf
- Description:
- IC VREF SHUNT ADJ 2.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
TL432IDBVR from Texas Instruments is a precision programmable shunt voltage reference in SOT-23-3 package, delivering 2.495 V nominal reference voltage with ±0.5% initial tolerance (B-grade), 14 mV max temperature drift over −40°C to 125°C, and 0.2 Ω typical dynamic impedance - used for feedback regulation in isolated DC/DC converters and industrial power supplies.
For engineers reviewing the TL432IDBVR datasheet, TL432IDBVR pinout, TL432IDBVR application, or TL432IDBVR equivalent, this page provides verified electrical specs, thermal behavior, stability boundaries, real-world use cases, and validated alternative parts for high-reliability power control designs.
Technical Context
The TL432IDBVR implements a three-terminal adjustable shunt regulator architecture with an internal error amplifier, reference cell, and output transistor - enabling precise voltage regulation via external resistor divider between cathode and reference pins. Its sharp turn-on characteristic and low output impedance support stable operation in switching power supply feedback loops.
Unlike the TL431, the TL432IDBVR uses a distinct pinout (CATHODE–REF–ANODE) in the SOT-23-3 package, requiring PCB layout revision when substituting. It is rated for automotive-grade temperature range (−40°C to 125°C) and qualified per Q-temp specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.495 V (nominal), ±0.5% tolerance at 25°C - enables accurate setpoint control in closed-loop power regulation |
| Temperature Range | −40°C to +125°C - supports operation in under-hood automotive, industrial motor drives, and server PSU environments |
| Temp Drift (VI(dev)) | 14 mV max over full range - ensures ≤0.56% output variation across temperature, critical for stable feedback accuracy |
| Dynamic Impedance | 0.2 Ω typical at 1 kHz - minimizes AC error injection into feedback node during transient load events |
| Sink Current Range | 1 mA to 100 mA - accommodates wide gain-setting resistor values while maintaining regulation margin |
| Output Noise | Low broadband noise (typ. 20 µVRMS over 10 Hz–10 kHz) - reduces jitter in PWM timing derived from reference |
| Cathode Voltage Max | 36 V - allows direct use in 24 V and 32 V bus systems without external clamping |
Pinout & Package
SOT-23-3 package (2.90 mm × 1.30 mm), 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 / voltage sensing node | Connects to switched-node side of optocoupler or error amplifier output; sinks regulated current to maintain VKA ≈ Vref |
| REF (Pin 2) | Reference threshold input | High-impedance (2–4 µA bias) input tied to resistor divider midpoint; triggers regulation when voltage reaches ~2.495 V |
| ANODE (Pin 3) | Common return / ground reference | Typically connected to system ground or power supply return; defines voltage reference point for both REF and CATHODE |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage | 2.495 V to 36 V via two external resistors - eliminates need for multiple fixed-reference ICs in multi-rail systems |
| Sharp turn-on characteristic | Sub-100 ns response to reference threshold crossing - prevents oscillation in fast-transient power supplies |
| Low output impedance | 0.2 Ω typical - maintains regulation accuracy despite PCB trace inductance or capacitor ESR in feedback path |
| Q-temp qualification | Rated for −40°C to +125°C operation - meets AEC-Q100 stress test requirements for automotive power modules |
| Stability boundary data | Published CL vs. IKA stability curves (Fig. 6-18) - enables robust compensation design without empirical tuning |
Applications
| Rack Server Power Supply | Industrial AC/DC Converter |
|---|---|
Use Scenario: Secondary-side voltage feedback in isolated 48 V–12 V DC/DC modules with optocoupler isolation. IC Role / Device Role / Timing Role: Shunt reference providing precise 2.495 V threshold to drive optocoupler LED current proportional to output deviation. Use Value: Enables ±0.5% output regulation over line, load, and temperature - meeting 80 PLUS Titanium efficiency certification requirements. |
Use Scenario: Output voltage regulation in 3 kW industrial rectifier with active PFC front-end and LLC resonant stage. IC Role / Device Role / Timing Role: Feedback reference for secondary-side error amplifier controlling synchronous rectifier gate timing. Use Value: 14 mV temp drift ensures <±0.6% output shift across ambient −25°C to +70°C cabinet temperatures. |
| AC Inverter Drive | Servo Drive Control Module |
Use Scenario: DC bus voltage monitoring and overvoltage protection reference in 3-phase VFD with regenerative braking. IC Role / Device Role / Timing Role: Precision threshold detector feeding comparator that triggers IGBT shutdown during bus overvoltage events. Use Value: 0.5% initial tolerance guarantees trip point repeatability within ±0.12 V at 24 V bus - preventing nuisance trips or delayed protection. |
Use Scenario: Isolated auxiliary supply regulation for gate driver ICs and position encoder interfaces in robotic servo amplifiers. IC Role / Device Role / Timing Role: Shunt reference stabilizing 5 V/3.3 V isolated bias rails powering digital isolators and ADC references. Use Value: Low 0.2 Ω impedance suppresses noise coupling into sensitive analog signal chains, preserving encoder resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBVR | Same SOT-23-3 package but TL431 pinout (CATHODE–ANODE–REF); 0°C to 70°C rating; 2% initial tolerance (standard grade) | Limited to commercial-temperature industrial controls; requires PCB redesign due to reversed ANODE/REF pins | Select only if cost-sensitive, non-automotive, and layout can be modified to match TL431 pinout |
| MAX6126AASA+ | 2.5 V reference, 0.1% initial accuracy, SO-8 package, 3 ppm/°C drift, 1.2 µA max quiescent current | Higher precision and lower drift, but fixed 2.5 V output and no adjustable range; not drop-in compatible | Choose when ultra-low drift (<50 µV over −40°C to +125°C) and fixed 2.5 V are required - e.g., precision ADC references |
Compared with TL432IDBVR, TL431CDBVR offers lower cost but sacrifices temperature range and accuracy, while MAX6126AASA+ delivers superior stability at the expense of adjustability and package compatibility - making TL432IDBVR optimal for cost-constrained, wide-temp, adjustable feedback designs.
Availability
TL432IDBVR is available at Aetrix Electronics and suitable for rack server power supplies, industrial AC/DC converters, and servo drive control modules requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TL432IDBVR 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 heritage in precision reference design.
The TL43x family was developed for high-reliability voltage regulation in power conversion systems - emphasizing thermal stability, low impedance, and robustness across automotive, industrial, and computing applications.
FAQ
What is the exact pin configuration of TL432IDBVR?
The TL432IDBVR uses SOT-23-3 package with Pin 1 = CATHODE, Pin 2 = REF, Pin 3 = ANODE - distinct from TL431's CATHODE–ANODE–REF order. This difference mandates PCB layout changes during substitution; verify against TI's DBZ package drawing SLVS543S Figure 5-1.
Does TL432IDBVR support adjustable output voltages above 12 V?
Yes, TL432IDBVR supports output adjustment from 2.495 V up to 36 V using two external resistors, confirmed by TI's Electrical Characteristics tables (Sections 6.5–6.13) and Figure 9-1 typical application circuit - enabling use in 24 V and 32 V industrial bus systems.
What is the maximum cathode voltage rating for TL432IDBVR?
TL432IDBVR has an absolute maximum cathode voltage (VKA) rating of 37 V, with recommended operating range up to 36 V per Section 6.1 and 6.4 of the datasheet - ensuring safe operation in 24 V and 32 V isolated power supplies without external clamping.
How does TL432IDBVR's temperature drift compare to TL431 variants?
TL432IDBVR (I-grade, −40°C to +125°C) exhibits 14 mV max VI(dev) over temperature, identical to TL431BI and TL431BQ - matching B-grade precision but extended to full automotive range, unlike C-grade (6 mV) or standard-grade (25 mV) versions.
Is TL432IDBVR suitable for use in feedback loops with optocouplers?
Yes, TL432IDBVR is widely deployed in optocoupler-based feedback circuits for isolated DC/DC converters. Its 0.2 Ω dynamic impedance and sharp turn-on ensure minimal phase lag and stable loop response - validated in TI's Application Report SLVA664 and Figure 9-2.
TL432IDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TL432IDBVR FAQ
1.How can I place an order for TL432IDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432IDBVR 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 TL432IDBVR reliable?
The price and inventory of TL432IDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432IDBVR is usually 5 days.
3.What payment methods are accepted for TL432IDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432IDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432IDBVR?
TL432IDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432IDBVR 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 TL432IDBVR?
For technical support, including TL432IDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432IDBVR requirements.
6.How does Aetrix verify that TL432IDBVR is sourced from the original manufacturer or authorized distributors?
All TL432IDBVR 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 TL432IDBVR meets industry standards.
7.What is the process for return or replacement of TL432IDBVR?
All TL432IDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TL432IDBVR, 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 TL432IDBVR part is unused and in its original packaging.
Return procedure for TL432IDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432IDBVR Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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