My Inquiry
My Account
Texas Instruments TL432AQDBVTG4
- Part No.:
- TL432AQDBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432AQDBVTG4.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,843
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL432AQDBVTG4 from Texas Instruments is a precision programmable shunt voltage reference in SOT-23-3 package, featuring 1% initial reference voltage tolerance at 25°C, −40°C to +125°C operating temperature range, and 14 mV max reference voltage deviation over full temperature range. It delivers 0.2 Ω typical dynamic impedance and supports 1–100 mA sink current for feedback regulation in isolated DC/DC converters and industrial power supplies.
For engineers reviewing the TL432AQDBVTG4 datasheet, TL432AQDBVTG4 pinout, TL432AQDBVTG4 application, or TL432AQDBVTG4 equivalent, this page provides verified electrical specifications, automotive-grade thermal performance data, pin-level functional mapping, and validated alternative parts for high-reliability power control designs.
Technical Context
The TL432AQDBVTG4 implements a three-terminal adjustable shunt regulator architecture with an internal precision 2.495 V reference and high-gain error amplifier. Its cathode-anode-ref terminal configuration enables direct replacement of Zener diodes in closed-loop feedback paths without external biasing.
Unlike the TL431, the TL432AQDBVTG4 uses a distinct pinout (CATHODE–REF–ANODE) in the SOT-23-3 package, requiring PCB layout revision when migrating from TL431 variants. It maintains identical electrical specs-including 0.2 Ω dynamic impedance and 14 mV tempco-across the Q-temp grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.470–2.520 V at 25°C (1% A-grade accuracy enables ±25 mV output setpoint stability in 5 V systems) |
| Temp Range | −40°C to +125°C (Q-grade qualification supports under-hood automotive and industrial motor drive applications) |
| Ref Voltage Drift | ≤14 mV over full temperature range (ensures ≤0.56% output variation in 25 V feedback networks) |
| Dynamic Impedance | 0.2 Ω typical (minimizes load-induced output voltage sag during transient current steps up to 100 mA) |
| Sink Current Range | 1–100 mA (supports direct interface with optocoupler LEDs in flyback PSR feedback loops) |
| Output Noise | Low broadband noise (typical 160 nV/√Hz at 1 kHz), critical for low-ripple voltage sensing in precision ADC references) |
| Min Cathode Current | 0.4–0.7 mA (enables stable regulation even with high-value feedback resistors, reducing quiescent power) |
Pinout & Package
SOT-23-3 package (2.90 mm × 1.30 mm body size) with gull-wing leads; RoHS-compliant, lead-free, and halogen-free per TI specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: CATHODE | Shunt current input / voltage sense node | Connects to switched node in isolated DC/DC; carries full regulation current; voltage referenced to ANODE |
| Pin 2: REF | Reference threshold input | Internal 2.495 V comparator input; sets output voltage via resistor divider (VOUT = VREF × (1 + R1/R2)) |
| Pin 3: ANODE | Common return / ground reference | Must be connected to system ground or lowest potential point; all voltages defined relative to this pin |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-Qualified Temp Range | −40°C to +125°C operation confirmed per TI's Q-grade testing-enables use in engine control modules and EV battery management |
| 1% Initial Accuracy (A Grade) | Reduces need for post-manufacturing trimming in 12 V and 24 V industrial power supplies, lowering calibration cost |
| 0.2 Ω Dynamic Impedance | Stabilizes feedback loop gain across load transients, improving PSRR in multi-output SMPS designs |
| 1–100 mA Sink Capability | Directly drives PC817/PC818 optocoupler LEDs without external transistor, simplifying isolated feedback circuitry |
| 14 mV Max Temp Drift | Ensures <±0.06% output variation over temperature in 24 V telecom rectifiers, meeting GR-1089 Class 3 requirements |
Applications
| Industrial AC/DC Power Supply | Rack Server Primary Side Regulation |
|---|---|
|
Use Scenario: Feedback reference in 3 kW telecom rectifier with active PFC and LLC resonant stage. IC Role / Device Role / Timing Role: Shunt reference setting precise 12 V output via optocoupler-coupled error amplifier. Use Value: 1% initial tolerance and 14 mV temp drift ensure output remains within ±120 mV over lifetime, eliminating field recalibration. |
Use Scenario: Secondary-side voltage reference in redundant 48 V server PSU with digital PMBus control. IC Role / Device Role / Timing Role: Precision reference for isolated feedback path; interfaces with UCC28911 controller via optocoupler. Use Value: 0.2 Ω dynamic impedance suppresses ripple coupling into feedback loop, maintaining <±0.5% output regulation under 50% load step. |
| AC Inverter Drive Control | Servo Drive Auxiliary Power |
|
Use Scenario: Reference for gate driver bias supply in 15 kW VFD with IGBT half-bridge topology. IC Role / Device Role / Timing Role: Stable 5 V reference for isolated DC/DC converter powering high-side gate drivers. Use Value: Q-grade temp range ensures reliable operation at 110°C ambient near heatsinks; no derating required. |
Use Scenario: Feedback reference in auxiliary 24 V/500 mA flyback supplying servo motor encoder and logic. IC Role / Device Role / Timing Role: Programmable shunt reference enabling single-BOM support for 12 V/24 V/48 V servo platforms. Use Value: Adjustable output (2.5–36 V) via resistor divider allows reuse across multiple servo models without redesign. |
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 accuracy and Q-temp rating, but TL431 pinout (REF–CATHODE–ANODE) in SOT-23-3 | Requires PCB layout change due to reversed REF/CATHODE pins; not drop-in compatible | Select only if legacy TL431 footprint reuse is mandatory and board revision is feasible |
| MAX6008AEUR+T | Fixed 2.5 V output, ±0.2% initial accuracy, 30 ppm/°C tempco, SOT-23-3 | No adjustability; lower drift but fixed voltage limits flexibility in multi-rail systems | Prefer for ultra-stable 2.5 V references where programmability is unnecessary and tighter initial tolerance is critical |
Compared with TL432AQDBVTG4, TL431AQDBVR demands trace routing changes due to inverted pinout, while MAX6008AEUR+T trades adjustability for superior initial accuracy and lower drift-making it suitable only for fixed-voltage, high-precision roles.
Availability
TL432AQDBVTG4 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, rack server primary-side regulation, and AC inverter drive control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL432AQDBVTG4 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 and embedded processing technologies, with decades of expertise in precision analog ICs and power management solutions.
The TL43x family was designed specifically for high-reliability voltage reference and feedback regulation in power conversion systems-emphasizing thermal stability, low impedance, and robustness across automotive, industrial, and computing applications.
FAQ
What is the exact reference voltage tolerance of TL432AQDBVTG4 at 25°C?
The TL432AQDBVTG4 has a guaranteed reference voltage tolerance of ±1% at 25°C, corresponding to a 2.470 V to 2.520 V range per TI's Electrical Characteristics table for TL432AQ devices. This A-grade accuracy is measured under standard test conditions (VKA = Vref, IKA = 10 mA) and is fully specified in the official SLVS543S datasheet revision May 2024.
Does TL432AQDBVTG4 support operation at 125°C junction temperature?
Yes, TL432AQDBVTG4 is qualified for continuous operation from −40°C to +125°C ambient temperature (Q-grade). Its maximum junction temperature is rated at 150°C, and thermal resistance (RθJA) for the SOT-23-3 package is 206°C/W-allowing safe operation at full ambient rating with appropriate PCB copper area and airflow.
How does the pinout of TL432AQDBVTG4 differ from TL431 variants?
TL432AQDBVTG4 uses CATHODE–REF–ANODE pin order (Pin 1–2–3) in SOT-23-3, whereas TL431 variants use REF–CATHODE–ANODE. This reversal means TL432AQDBVTG4 is not pin-compatible with TL431 footprints-direct substitution requires PCB layout modification to avoid misconnection and device failure.
What is the minimum cathode current required for regulation in TL432AQDBVTG4?
The TL432AQDBVTG4 requires a minimum cathode current of 0.4–0.7 mA to maintain regulation, as specified in Section 6.10 of the datasheet. This low Imin enables use with high-value feedback resistors (e.g., 1 MΩ top resistor), reducing standby power consumption in energy-sensitive applications like IoT gateways.
Can TL432AQDBVTG4 replace a Zener diode in a linear regulator feedback loop?
Yes, TL432AQDBVTG4 is explicitly designed as a precision Zener diode replacement. With its sharp turn-on characteristic, 0.2 Ω dynamic impedance, and 1% initial accuracy, it provides superior regulation stability and temperature performance compared to discrete Zeners-especially in adjustable 5 V, 12 V, or 24 V linear regulator feedback paths.
TL432AQDBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
TL432AQDBVTG4 FAQ
1.How can I place an order for TL432AQDBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432AQDBVTG4 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 TL432AQDBVTG4 reliable?
The price and inventory of TL432AQDBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432AQDBVTG4 is usually 5 days.
3.What payment methods are accepted for TL432AQDBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432AQDBVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432AQDBVTG4?
TL432AQDBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432AQDBVTG4 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 TL432AQDBVTG4?
For technical support, including TL432AQDBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432AQDBVTG4 requirements.
6.How does Aetrix verify that TL432AQDBVTG4 is sourced from the original manufacturer or authorized distributors?
All TL432AQDBVTG4 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 TL432AQDBVTG4 meets industry standards.
7.What is the process for return or replacement of TL432AQDBVTG4?
All TL432AQDBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL432AQDBVTG4, 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 TL432AQDBVTG4 part is unused and in its original packaging.
Return procedure for TL432AQDBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432AQDBVTG4 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
