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Texas Instruments TL432ACDBVR
- Part No.:
- TL432ACDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432ACDBVR.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,900
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Product details
Overview
TL432ACDBVR from Texas Instruments is a precision programmable shunt voltage reference in SOT-23-3 package, featuring 1% initial reference voltage tolerance at 25°C (A grade), adjustable output from 2.47 V to 36 V, and operation across –40°C to 85°C. It delivers 0.2 Ω typical dynamic impedance and supports 1–100 mA sink current, enabling high-accuracy feedback in isolated DC/DC converters and industrial power supplies.
For engineers reviewing the TL432ACDBVR datasheet, TL432ACDBVR pinout, TL432ACDBVR application, or TL432ACDBVR equivalent, key selection criteria include its A-grade accuracy, SOT-23-3 footprint compatibility, thermal stability over industrial temperature range, and low-noise shunt regulation for closed-loop voltage control.
Technical Context
The TL432ACDBVR implements a three-terminal adjustable shunt regulator architecture with an internal precision bandgap reference and error amplifier driving a NPN output stage. Its REF pin senses voltage relative to ANODE, and CATHODE sinks current to maintain VREF × (1 + R1/R2) at the cathode node.
Unlike the TL431, the TL432ACDBVR uses a distinct pinout (CATHODE–REF–ANODE) in the SOT-23-3 package, requiring PCB layout revision when substituting. It shares identical electrical specifications-including 2.47–2.52 V reference voltage, ≤16 mV tempco drift (–40°C to 85°C), and 0.2 Ω dynamic impedance-with the TL431AI/TL431AQ variants but differs in terminal assignment and thermal resistance (RθJA = 206°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.47–2.52 V at 25°C (A grade); sets minimum programmable output of 2.47 V in shunt regulator circuits |
| Initial Accuracy | ±1% at 25°C; enables ±1% system-level output voltage tolerance without trimming in power supply feedback networks |
| Temp Range | –40°C to +85°C; qualified for industrial ambient environments without derating in AC/DC adapters and servo drives |
| Dynamic Impedance | 0.2 Ω typical; ensures stable regulation under fast load transients in switching power supplies |
| Sink Current Range | 1–100 mA; supports direct interface with optocoupler LEDs in isolated flyback controllers |
| Output Noise | Low broadband noise; maintains signal integrity in precision voltage monitoring paths |
| Min Cathode Current | 0.4–0.6 mA; defines lowest operating point before regulation loss-critical for light-load efficiency design |
Pinout & Package
SOT-23-3 package (2.90 mm × 1.30 mm body, nominal), surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: CATHODE | Current sink node | Connects to primary-side switch node or optocoupler anode; carries full regulation current |
| Pin 2: REF | Reference input | Senses divided output voltage; threshold is 2.47–2.52 V relative to ANODE |
| Pin 3: ANODE | Common return | Typically tied to system ground or negative rail; serves as voltage reference point for REF pin |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable shunt regulation | Programmable 2.47 V to 36 V output using two external resistors-replaces discrete Zener + op-amp solutions |
| Sharp turn-on characteristic | Fast error amplifier response enables stable regulation even with high-gain optocoupler feedback loops |
| Low output impedance | 0.2 Ω dynamic impedance minimizes output voltage deviation during 10–100 mA load steps |
| Industrial temperature rating | –40°C to +85°C operation verified per TL432AI spec-supports deployment in motor drives and server PSUs |
| ESD robustness | ±2000 V HBM rating protects against handling damage during assembly and field service |
Applications
| Rack Server Power | Industrial AC/DC Converter |
|---|---|
Use Scenario: Secondary-side voltage feedback in 1U server PSU with optocoupler isolation. IC Role / Device Role / Timing Role: Shunt reference providing precise 12 V regulation setpoint to TL432ACDBVR REF pin. Use Value: ±1% reference accuracy directly translates to ±1% output voltage tolerance across line/load/temp, meeting ATX12VO spec. |
Use Scenario: Output voltage sensing in 3 kW industrial rectifier with wide input range (85–265 VAC). IC Role / Device Role / Timing Role: Adjustable shunt regulator setting 24 V output via resistor divider on TL432ACDBVR REF pin. Use Value: 0.2 Ω dynamic impedance suppresses ripple-induced regulation error under 50 Hz–1 kHz harmonic loads. |
| AC Inverter Drive | Servo Drive Control Module |
Use Scenario: DC bus voltage monitor in VFD mainboard, feeding analog-to-digital converter input. IC Role / Device Role / Timing Role: Precision shunt reference generating stable 5 V reference for ADC biasing. Use Value: ≤16 mV total reference drift over –40°C to +85°C ensures <0.1% ADC gain error across operating envelope. |
Use Scenario: Isolated gate driver bias supply regulation in three-phase servo drive power stage. IC Role / Device Role / Timing Role: TL432ACDBVR configured as 15 V shunt regulator for isolated IGBT driver IC supply. Use Value: 1–100 mA sink capability supports peak driver current demands while maintaining tight 15 V ±1% regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | Different pinout (CATHODE–ANODE–REF); identical electrical specs and A-grade accuracy | Requires PCB redesign due to swapped ANODE/REF pins; not drop-in compatible | Select only if legacy TL431 layout reuse is prioritized over footprint standardization |
| TLVH431ACDBVR | Lower 1.24 V reference voltage; 1% accuracy; same SOT-23-3 package and pinout | Enables lower-voltage feedback (e.g., 3.3 V rails); higher reference current (10 µA vs 2–4 µA) | Choose when designing for sub-5 V outputs or needing reduced divider current consumption |
Compared with TL431ACDBVR, TL432ACDBVR offers identical regulation performance but mandates layout changes due to pinout reversal; versus TLVH431ACDBVR, it provides higher reference voltage and lower input bias current-making it optimal for 12–24 V industrial power systems where headroom and divider efficiency matter.
Availability
TL432ACDBVR is available at Aetrix Electronics and suitable for rack server power, industrial AC/DC converters, and servo drive control modules requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TL432ACDBVR 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 TL432ACDBVR-is engineered for high-reliability voltage regulation in industrial, computing, and motor control power systems, emphasizing accuracy, thermal stability, and ease of use in feedback networks.
FAQ
What is the reference voltage tolerance of TL432ACDBVR at 25°C?
The TL432ACDBVR has a reference voltage tolerance of ±1% at 25°C, corresponding to a 2.47 V to 2.52 V range. This A-grade specification is confirmed in Section 6.8 of the TI datasheet (SLVS543S) and applies specifically to the TL432ACDBVR variant in SOT-23-3 packaging. The tolerance remains stable across its rated industrial temperature range.
How does TL432ACDBVR differ from TL431ACDBVR in pin configuration?
The TL432ACDBVR uses a CATHODE–REF–ANODE pinout (Pin 1–2–3) in the SOT-23-3 package, whereas TL431ACDBVR uses CATHODE–ANODE–REF. This reversal means TL432ACDBVR is not pin-compatible with TL431ACDBVR-direct substitution requires PCB layout modification. Both share identical electrical performance and A-grade accuracy.
What is the maximum operating temperature range for TL432ACDBVR?
The TL432ACDBVR is rated for operation from –40°C to +85°C, matching the TL432AI specification. This industrial temperature range is validated per Section 6.9 of the datasheet and supports deployment in demanding environments such as AC inverters, servo drives, and server power supplies without thermal derating.
Can TL432ACDBVR be used in place of a Zener diode?
Yes, TL432ACDBVR replaces Zener diodes in precision regulation applications. Its active error amplifier delivers sharp turn-on, 0.2 Ω dynamic impedance, and adjustable 2.47–36 V output-enabling tighter tolerance, lower noise, and better temperature stability than passive Zeners. It is widely used in optocoupler-based feedback loops of isolated SMPS.
What is the minimum cathode current required for regulation in TL432ACDBVR?
The TL432ACDBVR requires a minimum cathode current of 0.4–0.6 mA to maintain regulation, as specified in Section 6.8 (Imin). This value ensures stable operation under light-load conditions in applications like standby power rails or low-power sensor interfaces, where excessive current draw must be avoided.
TL432ACDBVR 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:
- ±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
TL432ACDBVR FAQ
1.How can I place an order for TL432ACDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432ACDBVR 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 TL432ACDBVR reliable?
The price and inventory of TL432ACDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432ACDBVR is usually 5 days.
3.What payment methods are accepted for TL432ACDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432ACDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432ACDBVR?
TL432ACDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432ACDBVR 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 TL432ACDBVR?
For technical support, including TL432ACDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432ACDBVR requirements.
6.How does Aetrix verify that TL432ACDBVR is sourced from the original manufacturer or authorized distributors?
All TL432ACDBVR 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 TL432ACDBVR meets industry standards.
7.What is the process for return or replacement of TL432ACDBVR?
All TL432ACDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TL432ACDBVR, 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 TL432ACDBVR part is unused and in its original packaging.
Return procedure for TL432ACDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432ACDBVR Tags
-
TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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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
-
AZ431LANTR-G1
Diodes Incorporated
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