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Texas Instruments TL432ACDBVRE4
- Part No.:
- TL432ACDBVRE4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432ACDBVRE4.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,088
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Product details
Overview
TL432ACDBVRE4 from Texas Instruments is a precision programmable shunt voltage reference in SOT-23-5 package, delivering 2.47–2.52 V reference voltage (±1% initial tolerance at 25°C), 0.2 Ω typical dynamic impedance, and sink-current capability from 1 mA to 100 mA. It operates across −40°C to 85°C and serves as a Zener diode replacement in secondary-side regulation of flyback SMPSs.
For engineers reviewing the TL432ACDBVRE4 datasheet, TL432ACDBVRE4 pinout, TL432ACDBVRE4 application, or TL432ACDBVRE4 equivalent, this device requires attention to its unique DBV (SOT-23-5) pinout-distinct from TL431-and its A-grade accuracy, temperature drift (≤14 mV over full range), cathode voltage range (2.5 V to 36 V), and low reference input current (2–4 µA).
Technical Context
The TL432ACDBVRE4 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 two external resistors.
Unlike the TL431, the TL432 variant uses a different pin assignment in DBV, DBZ, and PK packages-specifically, Pin 1 = CATHODE, Pin 2 = ANODE, Pin 3 = NC, Pin 4 = REF, Pin 5 = NC-ensuring correct PCB layout for stability-critical applications like isolated power supply feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.47–2.52 V at 25°C (A-grade ±1% tolerance); sets precise feedback threshold in regulation circuits |
| Output Impedance | 0.2 Ω typical; ensures minimal voltage deviation under load transients in closed-loop systems |
| Cathode Voltage Range | 2.5 V to 36 V; supports wide-output DC-DC converters without external level-shifting |
| Sink Current Range | 1 mA to 100 mA; enables direct drive of optocoupler LEDs or small-signal loads in feedback paths |
| Temp. Drift (VI(dev)) | ≤14 mV over −40°C to 85°C; maintains <0.06% output variation across industrial temperature range |
| Ref Input Current | 2–4 µA; reduces resistor-divider loading error and improves accuracy in high-impedance feedback networks |
| Min Cathode Current | 0.4–0.7 mA; defines lowest stable operating point for regulation onset in low-power standby modes |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm max height, gull-wing leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | CATHODE | Shunt current output node; connects to primary-side controller via optocoupler or directly to regulated rail |
| Pin 2 | ANODE | Common reference return; must be tied to system ground or power rail common point for stable operation |
| Pin 3 | NC | No internal connection; left unconnected on PCB to avoid parasitic coupling or mechanical stress |
| Pin 4 | REF | High-impedance reference input; compares external divider voltage against internal 2.5 V bandgap for error amplification |
| Pin 5 | NC | No internal connection; electrically and thermally isolated; no routing or thermal pad required |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Voltage | Settable from 2.5 V to 36 V using two external resistors-enables single BOM for multiple output rails |
| Low Temperature Drift | ≤14 mV over −40°C to 85°C (I-grade)-reduces calibration burden in automotive and industrial environments |
| Sharp Turn-On Characteristic | Active output circuitry delivers fast response to reference threshold crossing-improves transient regulation in SMPS |
| Zener Replacement Capability | Replaces discrete Zener diodes with superior accuracy, lower noise, and tighter thermal stability |
| Low Output Noise | Enables clean feedback signals in sensitive analog monitoring and precision comparator applications |
Applications
| Secondary-Side Regulation | Voltage Monitoring |
|---|---|
Use Scenario: Isolated flyback converter where TL432ACDBVRE4 resides on secondary side, feeding error signal via optocoupler to primary-side PWM controller. IC Role / Device Role / Timing Role: Precision shunt reference generating stable feedback voltage proportional to output rail. Use Value: Enables ±1% output regulation across line/load/temperature without trimming, reducing BOM count vs. discrete Zener + op-amp solutions. |
Use Scenario: Overvoltage protection circuit monitoring 12 V battery rail in automotive ECU, triggering shutdown if >13.2 V. IC Role / Device Role / Timing Role: Adjustable threshold detector with integrated reference, driving comparator input directly. Use Value: Eliminates need for external precision reference IC; 2.5 V internal reference + resistor divider achieves exact 13.2 V trip point with <0.1% error. |
| Zener Diode Replacement | Adjustable Power Supply Reference |
Use Scenario: Onboard 5 V LDO regulator requiring stable 2.5 V reference for feedback, replacing 2.5 V Zener in space-constrained IoT sensor node. IC Role / Device Role / Timing Role: Low-drift, low-noise shunt reference providing accurate setpoint for error amplifier. Use Value: Reduces output voltage drift by 5× versus standard Zener (6 mV vs. 30+ mV over temp), improving sensor measurement accuracy. |
Use Scenario: Lab bench power supply with digitally controlled 0–30 V output, using TL432ACDBVRE4 in DAC-controlled resistor network. IC Role / Device Role / Timing Role: Programmable reference element enabling fine-grained voltage step resolution (e.g., 10 mV steps). Use Value: Achieves 0.04% resolution over full range using 12-bit DAC and 0.2 Ω output impedance-no additional buffer amplifier needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | Same electrical specs but DBV pinout differs: Pin 1 = REF, Pin 2 = ANODE, Pin 3 = CATHODE-requires PCB redesign. | Not drop-in; incompatible pin mapping prevents direct replacement without layout change. | Select only if redesigning for TL431 footprint compatibility or leveraging broader TL431 ecosystem support. |
| TL432AIDBVRE4 | Identical pinout and function, but I-grade (−40°C to 85°C) with wider VI(dev) spec (≤34 mV vs. ≤14 mV). | Acceptable for commercial-temp designs where cost priority outweighs drift performance. | Choose when extended temperature range is unnecessary and higher drift tolerance is acceptable to reduce cost. |
Compared with TL431ACDBVR, TL432ACDBVRE4 avoids pinout-induced layout errors in new designs; compared with TL432AIDBVRE4, it delivers tighter thermal stability critical for precision power monitoring-making it optimal for industrial and automotive feedback loops demanding ±1% accuracy across temperature.
Availability
TL432ACDBVRE4 is available at Aetrix Electronics and suitable for secondary-side regulation, voltage monitoring, Zener replacement, and adjustable power supply reference applications requiring stable component supply and long-term production continuity.
Supply support for TL432ACDBVRE4 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-including TL432ACDBVRE4-is engineered for high-accuracy voltage referencing in isolated power supplies, battery monitors, and industrial control systems where stability, low drift, and robustness are essential.
FAQ
What is the reference voltage tolerance of TL432ACDBVRE4 at 25°C?
The TL432ACDBVRE4 has an initial reference voltage tolerance of ±1% at 25°C, corresponding to a 2.47–2.52 V range. This A-grade specification is confirmed in Section 7.8 of the SLVS543P datasheet and applies specifically to the AC (A-grade, I-temp) variant in DBV packaging. The tolerance remains stable across cathode currents from 1 mA to 100 mA.
How does the TL432ACDBVRE4 pinout differ from TL431 in SOT-23-5?
The TL432ACDBVRE4 uses a distinct SOT-23-5 (DBV) pinout: Pin 1 = CATHODE, Pin 2 = ANODE, Pin 3 = NC, Pin 4 = REF, Pin 5 = NC. In contrast, TL431DBVR assigns Pin 1 = REF, Pin 2 = ANODE, Pin 3 = CATHODE. This difference is explicitly documented in the "Device Comparison Table" and "Pin Configuration" sections of the TI datasheet-using TL431 layout with TL432ACDBVRE4 will cause functional failure.
What is the maximum cathode voltage rating for TL432ACDBVRE4?
The absolute maximum cathode-to-anode voltage (VKA) for TL432ACDBVRE4 is 37 V, per Section 7.1 of the datasheet. However, the recommended operating range is 2.5 V to 36 V. Exceeding 36 V risks violating safe operating area limits, especially at elevated temperatures, and may degrade long-term reliability even if within absolute max ratings.
Can TL432ACDBVRE4 replace a Zener diode directly in existing circuits?
Yes, TL432ACDBVRE4 can directly replace Zener diodes in most shunt-regulator configurations, provided the circuit supplies ≥0.4 mA minimum cathode current and respects the 3-pin functional equivalence (CATHODE, ANODE, REF mapped correctly). Its 0.2 Ω dynamic impedance and sharp turn-on improve regulation accuracy and transient response beyond typical Zeners-no additional components are required.
What is the temperature range supported by TL432ACDBVRE4?
TL432ACDBVRE4 is rated for operation from −40°C to +85°C (I-grade), as indicated by the "I" suffix in the part number and verified in Section 7.4 ("Recommended Operating Conditions") and Section 7.9 ("Electrical Characteristics, TL432AI"). This range covers industrial and automotive under-hood applications where ambient thermal stress is significant.
TL432ACDBVRE4 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:
- ±1%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TL432ACDBVRE4 FAQ
1.How can I place an order for TL432ACDBVRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432ACDBVRE4 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 TL432ACDBVRE4 reliable?
The price and inventory of TL432ACDBVRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432ACDBVRE4 is usually 5 days.
3.What payment methods are accepted for TL432ACDBVRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432ACDBVRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432ACDBVRE4?
TL432ACDBVRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432ACDBVRE4 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 TL432ACDBVRE4?
For technical support, including TL432ACDBVRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432ACDBVRE4 requirements.
6.How does Aetrix verify that TL432ACDBVRE4 is sourced from the original manufacturer or authorized distributors?
All TL432ACDBVRE4 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 TL432ACDBVRE4 meets industry standards.
7.What is the process for return or replacement of TL432ACDBVRE4?
All TL432ACDBVRE4 units undergo pre-shipment inspection (PSI). If there is an issue with TL432ACDBVRE4, 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 TL432ACDBVRE4 part is unused and in its original packaging.
Return procedure for TL432ACDBVRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432ACDBVRE4 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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