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Texas Instruments TL432AQDBVT
- Part No.:
- TL432AQDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432AQDBVT.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,261
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Product details
Overview
TL432AQDBVT from Texas Instruments is a precision programmable shunt voltage reference in SOT-23-3 package, featuring 1% initial tolerance at 25°C, −40°C to 125°C automotive-grade operating temperature range, 14 mV max reference voltage drift over temperature, 0.2 Ω typical dynamic impedance, and 1–100 mA sink-current capability. It replaces Zener diodes in feedback loops of isolated DC/DC converters and industrial power supplies.
For engineers reviewing the TL432AQDBVT datasheet, TL432AQDBVT pinout, TL432AQDBVT application, or TL432AQDBVT equivalent, key selection criteria include its Q-temp automotive qualification, SOT-23-3 footprint compatibility with space-constrained PCBs, adjustable output (2.5 V to 36 V), low noise performance, and stable regulation under varying load and temperature conditions.
Technical Context
The TL432AQDBVT implements a three-terminal adjustable shunt regulator architecture with an internal error amplifier, reference voltage cell, and output transistor. Its REF–ANODE–CATHODE pinout differs from TL431, enabling distinct PCB layout routing while maintaining identical electrical behavior and functional modes.
It operates as a precision voltage-controlled current sink: when the REF pin voltage exceeds 2.47 V (min) relative to ANODE, the CATHODE draws current to maintain regulation. The device supports stable operation with capacitive loads up to 1 µF and exhibits sharp turn-on characteristics critical for accurate feedback control in switching regulators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.47–2.52 V at 25°C; sets minimum threshold for regulation activation in feedback networks. |
| Initial Tolerance | ±1% at 25°C (A grade); ensures tight output voltage setting without trimming in production systems. |
| Temp Range | −40°C to +125°C; qualified for automotive under-hood and industrial high-temperature environments. |
| Dynamic Impedance | 0.2 Ω typical; enables stable regulation despite rapid load transients in SMPS feedback paths. |
| Sink Current Range | 1–100 mA; supports direct drive of optocoupler LEDs or biasing of secondary-side controllers. |
| Ref Voltage Drift | ≤34 mV over full temperature range; guarantees <±0.14% output variation across operating envelope. |
| Output Noise | Low broadband noise; minimizes jitter in voltage-sensing loops of precision power control circuits. |
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) | Current sink output | Connects to high-side node of feedback divider or optocoupler anode; carries full regulation current. |
| REF (Pin 2) | Voltage sense input | Compares external resistor-divider voltage against internal 2.495 V reference; controls conduction. |
| ANODE (Pin 3) | Common reference terminal | Typically tied to system ground or return path; serves as voltage reference point for REF and CATHODE. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Q-temp qualification | Rated for −40°C to +125°C operation with full parametric guarantee per AEC-Q100 guidelines. |
| Adjustable output range | 2.5 V to 36 V via two external resistors; eliminates need for multiple fixed-voltage references. |
| Sharp turn-on characteristic | Fast response to REF voltage crossing threshold; reduces regulation delay in transient-sensitive supplies. |
| Low output impedance | 0.2 Ω typical dynamic impedance; maintains regulation accuracy under dynamic load steps. |
| Zener diode replacement | Superior thermal stability and tighter tolerance vs. discrete Zeners; simplifies BOM and improves long-term reliability. |
Applications
| Rack Server Power Supply | Industrial AC/DC Converter |
|---|---|
Use Scenario: Secondary-side voltage sensing in isolated 48 V–12 V DC/DC modules with optocoupler feedback. IC Role / Device Role / Timing Role: Precision shunt reference providing stable 2.5 V threshold to drive optocoupler LED current. Use Value: Enables ±1% output voltage regulation across line/load/temperature; replaces less-stable Zener-based solutions. |
Use Scenario: Output voltage regulation in 3 kW industrial rectifier with digital controller interface. IC Role / Device Role / Timing Role: Adjustable reference generating precise feedback signal for PWM duty-cycle correction. Use Value: Maintains 0.14% max output drift over −40°C to +125°C ambient, meeting IEC 61000-6-2 immunity requirements. |
| AC Inverter Drive | Servo Drive Control Module |
Use Scenario: DC bus voltage monitoring and overvoltage protection threshold generation in 3-phase motor drives. IC Role / Device Role / Timing Role: Programmable shunt reference setting trip point for comparator-based fault detection circuit. Use Value: 1% tolerance ensures consistent overvoltage response across production units; SOT-23-3 saves board space in dense gate-driver layouts. |
Use Scenario: Isolated feedback for auxiliary 5 V/3.3 V bias rails powering position encoder interfaces and FPGA I/O banks. IC Role / Device Role / Timing Role: Stable reference source for secondary-side error amplifiers in flyback-derived auxiliary supplies. Use Value: Low 0.2 Ω impedance prevents regulation droop during encoder pulse bursts; Q-temp rating supports extended field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431AQDBVR | Same A-grade tolerance and Q-temp rating, but TL431 pinout (REF–ANODE–CATHODE) in SOT-23-3. | Requires PCB layout revision due to reversed REF/CATHODE pins; not drop-in compatible. | Select TL431AQDBVR only if redesigning for TL431 footprint or leveraging existing TL431 layout assets. |
| MAX6008AEUR+T | Fixed 2.5 V output, ±0.2% initial accuracy, −40°C to +125°C, SOT-23-3, but no adjustable range. | Lacks programmability; suitable only where exact 2.5 V is required and external resistor network is undesirable. | Choose MAX6008AEUR+T when highest initial accuracy is prioritized over adjustability and cost-per-function is secondary. |
Compared with TL431AQDBVR, TL432AQDBVT offers identical electrical specs but avoids layout conflict with legacy TL431 designs; versus MAX6008AEUR+T, it trades fixed-accuracy simplicity for full 2.5–36 V programmability essential in multi-output or adaptive power systems.
Availability
TL432AQDBVT is available at Aetrix Electronics and suitable for rack server power, industrial AC/DC converters, and servo drive control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL432AQDBVT 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 ICs, with decades of expertise in precision reference and power control technologies.
The TL43x family was designed for high-reliability voltage regulation in safety-critical and thermally demanding applications, including automotive powertrain, industrial automation, and telecom infrastructure.
FAQ
What is the reference voltage tolerance of TL432AQDBVT at 25°C?
The TL432AQDBVT has a guaranteed initial reference voltage tolerance of ±1% at 25°C, corresponding to a 2.47 V to 2.52 V range. This A-grade specification is fully characterized and tested per TI's production test flow, ensuring consistent performance in volume manufacturing without calibration.
How does TL432AQDBVT differ from TL431AQDBVT in pin configuration?
The TL432AQDBVT uses a CATHODE–REF–ANODE pinout (Pin 1–2–3) in the SOT-23-3 package, whereas TL431AQDBVT uses REF–ANODE–CATHODE. This reversal means TL432AQDBVT is not pin-compatible with TL431 layouts - direct substitution requires PCB modification to avoid misconnection.
What is the maximum cathode voltage rating for TL432AQDBVT?
The absolute maximum cathode voltage (VKA) for TL432AQDBVT is 37 V, referenced to the ANODE pin. For reliable operation, the recommended maximum is 36 V. Exceeding 37 V risks permanent damage, and operation near the limit requires careful thermal design due to power dissipation constraints.
Can TL432AQDBVT be used in place of a Zener diode?
Yes, TL432AQDBVT is explicitly designed as a superior replacement for Zener diodes in voltage regulation and reference applications. Its 0.2 Ω dynamic impedance, 1% tolerance, and −40°C to +125°C operation provide significantly better stability, accuracy, and temperature performance than standard Zener diodes.
What is the minimum cathode current required for regulation in TL432AQDBVT?
The TL432AQDBVT requires a minimum cathode current (Imin) of 0.4 mA to maintain regulation, with a typical value of 0.7 mA. Below this threshold, the device exits regulation mode and behaves as an open circuit; proper resistor divider sizing must ensure IKA ≥ 0.4 mA across all operating conditions.
TL432AQDBVT 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:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TL432AQDBVT FAQ
1.How can I place an order for TL432AQDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432AQDBVT 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 TL432AQDBVT reliable?
The price and inventory of TL432AQDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432AQDBVT is usually 5 days.
3.What payment methods are accepted for TL432AQDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432AQDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432AQDBVT?
TL432AQDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432AQDBVT 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 TL432AQDBVT?
For technical support, including TL432AQDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432AQDBVT requirements.
6.How does Aetrix verify that TL432AQDBVT is sourced from the original manufacturer or authorized distributors?
All TL432AQDBVT 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 TL432AQDBVT meets industry standards.
7.What is the process for return or replacement of TL432AQDBVT?
All TL432AQDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TL432AQDBVT, 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 TL432AQDBVT part is unused and in its original packaging.
Return procedure for TL432AQDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432AQDBVT 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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