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Texas Instruments TL432CDBVRG4
- Part No.:
- TL432CDBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432CDBVRG4.pdf
- Description:
- IC VREF SHUNT ADJ 2.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,980
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Product details
Overview
TL432CDBVRG4 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), 6 mV max full-range temperature drift (0°C to 70°C), 0.2 Ω typical dynamic impedance, and 1–100 mA sink-current capability. It serves as an adjustable voltage reference in secondary-side regulation of flyback SMPSs.
For engineers reviewing the TL432CDBVRG4 datasheet, TL432CDBVRG4 pinout, TL432CDBVRG4 application, or TL432CDBVRG4 equivalent, this page provides verified electrical specifications, validated SOT-23-3 pin mapping, confirmed thermal performance (RθJA = 206°C/W), and two field-tested alternative parts for voltage reference design continuity.
Technical Context
The TL432CDBVRG4 implements a three-terminal adjustable shunt regulator architecture with an internal error amplifier, reference, and output transistor. Its sharp turn-on characteristic and low 0.2 Ω dynamic impedance enable stable closed-loop feedback in isolated power supplies.
Unlike the TL431, the TL432 variant uses a distinct SOT-23-3 pinout (Cathode–Ref–Anode) and shares identical electrical specs but not pin compatibility. The 'C' suffix denotes 0°C to 70°C operation, and 'B' grade confirms 0.5% reference tolerance at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.495 V nominal (2.483–2.507 V, B grade at 25°C); sets precise feedback threshold in regulator loops. |
| Initial Tolerance | ±0.5% at 25°C; enables high-accuracy output voltage setting without trimming in production. |
| Temp Drift (0°C–70°C) | ≤6 mV total deviation; ensures ≤0.024% output variation over commercial temperature range. |
| Sink Current Range | 1–100 mA; supports direct drive of optocoupler LEDs or error amplifier inputs in SMPS feedback paths. |
| Dynamic Impedance | 0.2 Ω typical; minimizes output voltage perturbation under transient load changes in closed-loop systems. |
| Cathode Voltage Max | 37 V absolute max; allows safe operation with up to 36 V regulated output in high-voltage flyback designs. |
| Reference Input Current | 2–4 µA typical; reduces resistor-divider power loss and improves accuracy vs. Zener diodes. |
Pinout & Package
SOT-23-3 package (2.90 mm × 1.30 mm body), surface-mount, tape-and-reel. Pin 1: Cathode; Pin 2: Reference; Pin 3: Anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Shunt current input / voltage sense node | Connects to regulated output rail; sinks current to maintain VREF at pin 2 relative to anode. |
| 2 (Reference) | Threshold input | Compares external divider voltage against internal 2.495 V reference; controls cathode conduction. |
| 3 (Anode) | Common return / ground reference | Typically tied to system ground or power supply return; defines reference potential for all internal circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage | 2.5 V to 36 V via two external resistors; replaces discrete Zener + op-amp solutions with single IC. |
| Low output noise | Enables clean feedback signals in sensitive analog control loops without added filtering. |
| Zener diode replacement | Sharp turn-on and stable Vref eliminate Zener's poor tempco and high dynamic impedance limitations. |
| Wide operating temperature | 0°C to 70°C (C grade); suitable for commercial-grade power supplies and industrial control interfaces. |
| High ESD robustness | ±2000 V HBM rating; withstands handling and board assembly stresses without parameter shift. |
Applications
| Flyback SMPS Secondary Regulation | Voltage Monitoring & Protection |
|---|---|
Use Scenario: Isolated DC-DC converter where primary-side controller receives feedback via optocoupler from secondary-side TL432CDBVRG4. IC Role / Device Role / Timing Role: Adjustable shunt reference generating precise error signal proportional to output voltage deviation. Use Value: Enables ±1% output regulation across line/load/temperature without primary-side sensing complexity. |
Use Scenario: Overvoltage lockout circuit monitoring 12 V rail in automotive infotainment module. IC Role / Device Role / Timing Role: Precision threshold detector comparing rail voltage against 2.495 V reference via resistor divider. Use Value: Triggers shutdown at 12.5 V ±0.1 V (vs. ±0.5 V with 5% Zener), improving system reliability. |
| Programmable Current Source | Comparator with Integrated Reference |
Use Scenario: Constant-current LED driver for backlighting in medical display panel. IC Role / Device Role / Timing Role: Shunt reference establishing fixed voltage across sense resistor to set LED current. Use Value: Maintains 200 mA ±1% over 0–60°C ambient, eliminating need for external op-amp and trim pot. |
Use Scenario: Battery voltage supervisor in portable IoT sensor node. IC Role / Device Role / Timing Role: Comparator input referenced to internal 2.495 V; drives MCU wake-up interrupt on low-battery event. Use Value: Reduces BOM count by integrating reference and comparator function-no external voltage divider required. |
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 electrical specs but TL431 pinout (Cathode–Anode–Ref); not pin-compatible with TL432CDBVRG4. | Requires PCB layout change due to reversed Ref/Anode positions; unsuitable for drop-in replacement. | Select only if redesigning layout to match TL431 pinout and leveraging broader design familiarity. |
| LM4040CIM3-2.5/NOPB | Fixed 2.5 V output, no adjustability; 0.5% tolerance, 50 ppm/°C tempco; SOT-23-3 package. | Lacks adjustable output; limited to fixed-voltage reference use cases, not feedback loop tuning. | Choose when system requires only 2.5 V reference and benefits from lower quiescent current (60 µA vs. 4 µA). |
Compared with TL431CDBVR and LM4040CIM3-2.5/NOPB, TL432CDBVRG4 uniquely combines adjustable output (2.5–36 V), SOT-23-3 footprint, and 0.5% B-grade accuracy-making it optimal for compact, high-precision flyback feedback where flexibility and space matter.
Availability
TL432CDBVRG4 is available at Aetrix Electronics and suitable for flyback SMPS design, voltage supervision circuits, programmable current sources, and comparator-based threshold detection requiring stable component supply and guaranteed long-term sourcing.
Supply support for TL432CDBVRG4 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 leadership in precision reference design.
The TL43x family was engineered for high-accuracy, low-drift voltage referencing in power supply feedback, battery monitoring, and industrial control systems-emphasizing stability, wide operating range, and ease of implementation.
FAQ
What is the exact pinout configuration of TL432CDBVRG4?
The TL432CDBVRG4 uses SOT-23-3 package with pin 1 = Cathode, pin 2 = Reference, pin 3 = Anode (Cathode–Ref–Anode). This differs from TL431's Cathode–Anode–Ref arrangement. Confirming this pinout prevents incorrect PCB routing and functional failure in feedback networks.
Does TL432CDBVRG4 support operation above 70°C?
No. TL432CDBVRG4 is rated for 0°C to 70°C only ('C' grade). For extended temperature operation, TI offers TL432I variants (–40°C to 85°C) and TL432Q (–40°C to 125°C); TL432CDBVRG4 must not be used outside its specified commercial temperature range.
Can TL432CDBVRG4 replace a Zener diode directly?
Yes-TL432CDBVRG4 is explicitly designed as a Zener replacement. With its 2.495 V reference, 0.2 Ω dynamic impedance, and sharp turn-on, it outperforms standard Zeners in accuracy, tempco, and noise, requiring only two external resistors for adjustable output.
What is the minimum cathode current needed for regulation in TL432CDBVRG4?
The TL432CDBVRG4 requires ≥0.4 mA minimum cathode current (Imin) to maintain regulation. Below this, the device exits active mode and reference accuracy degrades. Designers must ensure external circuitry delivers sufficient current under all operating conditions.
How does the reference input current (Iref) affect TL432CDBVRG4 accuracy?
TL432CDBVRG4 draws 2–4 µA into its REF pin. This current flows through the upper resistor (R1) of the feedback divider, causing a small voltage drop that introduces gain error. Accurate designs compensate by selecting R1 ≤ 10 kΩ or using Iref-compensated divider equations.
Is TL432CDBVRG4 RoHS compliant and lead-free?
Yes. TL432CDBVRG4 is manufactured in TI's RoHS-compliant, lead-free SOT-23-3 package (DBV), meeting JEDEC J-STD-020 moisture sensitivity level 1 and IPC/JEDEC J-STD-033 handling requirements for surface-mount assembly.
TL432CDBVRG4 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:
- ±2.2%
- 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
TL432CDBVRG4 FAQ
1.How can I place an order for TL432CDBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432CDBVRG4 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 TL432CDBVRG4 reliable?
The price and inventory of TL432CDBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432CDBVRG4 is usually 5 days.
3.What payment methods are accepted for TL432CDBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432CDBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432CDBVRG4?
TL432CDBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432CDBVRG4 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 TL432CDBVRG4?
For technical support, including TL432CDBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432CDBVRG4 requirements.
6.How does Aetrix verify that TL432CDBVRG4 is sourced from the original manufacturer or authorized distributors?
All TL432CDBVRG4 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 TL432CDBVRG4 meets industry standards.
7.What is the process for return or replacement of TL432CDBVRG4?
All TL432CDBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL432CDBVRG4, 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 TL432CDBVRG4 part is unused and in its original packaging.
Return procedure for TL432CDBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432CDBVRG4 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
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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