My Inquiry
My Account
Texas Instruments TL432BCDBVR
- Part No.:
- TL432BCDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432BCDBVR.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,895
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL432BCDBVR from Texas Instruments is a precision programmable shunt voltage reference in SOT-23-3 package, featuring 0.5% initial reference voltage tolerance at 25°C, 2.483–2.507 V nominal Vref, and operation across −40°C to 125°C. It delivers 1 mA to 100 mA sink current with 0.2 Ω typical dynamic impedance and supports adjustable output from Vref to 36 V-widely deployed in industrial AC/DC power supplies and servo drive control modules.
For engineers reviewing the TL432BCDBVR datasheet, TL432BCDBVR pinout, TL432BCDBVR application, or TL432BCDBVR equivalent, key selection criteria include its B-grade accuracy, Q-temp automotive qualification, low temperature drift (14 mV max over −40°C to 125°C), and SOT-23-3 footprint compatibility with space-constrained feedback networks.
Technical Context
The TL432BCDBVR implements a three-terminal adjustable shunt regulator architecture with an internal precision reference amplifier and NPN pass transistor. Its REF pin senses voltage relative to ANODE, enabling precise closed-loop regulation via external resistor dividers-functionally identical to TL431 but with inverted CATHODE/ANODE/REF pinout in DBZ package.
It operates as a high-gain error amplifier driving a cathode-current sink, achieving sharp turn-on and stable regulation down to 0.4 mA minimum cathode current. The device maintains 0.2 Ω dynamic impedance below 1 kHz and exhibits low 1/f noise (≤1 µV over 10 s), making it suitable for precision feedback paths in switching regulators and isolated DC/DC converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Vref tolerance @ 25°C | ±0.5% (B grade): ensures ±12.5 mV absolute error at 2.5 V, critical for <1% output regulation in power supplies |
| Reference voltage range | 2.483–2.507 V (typ 2.495 V): sets tight baseline for externally adjustable outputs from 2.5 V to 36 V |
| Temp drift (−40°C to 125°C) | 14 mV max deviation: guarantees ≤0.056%/°C average TC, supporting stable performance in automotive under-hood environments |
| Sink current range | 1–100 mA: enables direct interface with optocoupler LEDs or error amplifier inputs without external buffering |
| Dynamic impedance | 0.2 Ω typ @ ≤1 kHz: provides low-impedance reference node, minimizing loop gain variation in feedback networks |
| Operating temperature | −40°C to +125°C (Q grade): qualified for automotive and industrial applications requiring extended thermal robustness |
| Package | SOT-23-3 (DBZ): 2.90 mm × 1.30 mm footprint, compatible with high-density PCB layouts and automated assembly |
Pinout & Package
SOT-23-3 (DBZ) package: 2.90 mm × 1.30 mm body, gull-wing leads, JEDEC MO-178AC compliant. Thermal resistance RθJA = 206°C/W (on 1-in² 2-oz copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: CATHODE | Current sink output | Primary regulated node; connects to supply rail or optocoupler anode; sinks up to 100 mA |
| Pin 2: REF | Reference input | Senses voltage divider output; threshold is ~2.495 V relative to ANODE; high-impedance (≤4 µA input) |
| Pin 3: ANODE | Common return | Reference ground for REF pin; must be connected to system ground or lowest potential point in feedback path |
Key Features
| Feature | Design Value |
|---|---|
| 0.5% initial accuracy (B grade) | Reduces need for post-manufacturing calibration in mid-tier power supplies and industrial controls |
| −40°C to 125°C operation (Q grade) | Enables use in automotive engine control units and outdoor industrial inverters without derating |
| 0.2 Ω dynamic impedance | Stabilizes feedback loop gain across load transients, improving transient response in SMPS designs |
| Low 1/f noise (≤1 µV over 10 s) | Minimizes output voltage ripple in precision analog sensing and high-resolution ADC reference circuits |
| Inverted pinout vs TL431 (DBZ) | Prevents accidental substitution in legacy TL431 designs; requires board-level pin mapping verification |
Applications
| Industrial AC/DC Power Supply | Servo Drive Control Module |
|---|---|
Use Scenario: Primary-side feedback in isolated flyback converters for factory automation equipment. IC Role / Device Role / Timing Role: Shunt reference regulating optocoupler LED current to maintain ±1% output voltage accuracy across line/load/temperature. Use Value: Enables compact, cost-effective regulation without secondary-side controller ICs while meeting IEC 61000-4 immunity requirements. |
Use Scenario: Voltage reference for current-sense amplifier biasing and PWM comparator thresholds in motor drives. IC Role / Device Role / Timing Role: Precision 2.5 V reference source for analog signal conditioning and protection circuitry. Use Value: Maintains torque accuracy within ±0.5% over −40°C to 125°C ambient, reducing field calibration frequency. |
| Rack Server Power | Notebook PC Power Adapter |
Use Scenario: Secondary-side voltage reference in multi-output VRM controllers for CPU/GPU rails. IC Role / Device Role / Timing Role: Adjustable shunt reference setting feedback divider for 12 V, 5 V, and 3.3 V outputs. Use Value: Supports dynamic voltage scaling and fast load-step response (<10 µs) due to low output impedance. |
Use Scenario: Feedback reference in compact 65 W GaN-based USB-C adapters. IC Role / Device Role / Timing Role: High-accuracy shunt reference enabling <1% output tolerance at full load and light-load efficiency optimization. Use Value: Reduces BOM count by eliminating trimming resistors and improves no-load standby power to <75 mW. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431BCDBVR | Same B-grade accuracy and Q-temp rating, but TL431 pinout (REF–ANODE–CATHODE) in SOT-23-3 | Direct drop-in replacement only if PCB layout uses TL431 pin assignment; incompatible with TL432 footprints | Select TL431BCDBVR when reusing existing TL431-based designs; verify REF-to-ANODE voltage compliance. |
| TLVH431BCDBVR | Lower 1.24 V reference, 0.5% tolerance, same SOT-23-3 package, but rated only to 85°C (I grade) | Not suitable for automotive or extended-temperature industrial use; limited to low-voltage (<15 V) feedback paths | Choose TLVH431BCDBVR for cost-sensitive consumer adapters where 1.24 V reference suffices and temp range is ≤85°C. |
Compared with TL431BCDBVR, TL432BCDBVR's inverted pinout prevents mechanical substitution but offers identical electrical specs-TLVH431BCDBVR trades voltage range and temperature capability for lower reference voltage and reduced cost in non-automotive applications.
Availability
TL432BCDBVR is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, servo drive control modules, and rack server power systems requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for TL432BCDBVR 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 was developed to replace discrete Zener diodes with higher-accuracy, lower-drift, and more predictable shunt regulation-targeting power supply feedback, voltage monitoring, and programmable threshold detection.
FAQ
What is the reference voltage tolerance of TL432BCDBVR at 25°C?
The TL432BCDBVR has a guaranteed initial reference voltage tolerance of ±0.5% at 25°C, corresponding to a 2.483 V to 2.507 V range around the typical 2.495 V value. This B-grade accuracy is specified in Section 6.11 of the TI SLVS543S datasheet and applies strictly to the TL432BCDBVR variant in SOT-23-3 packaging.
How does TL432BCDBVR differ from TL431BCDBVR electrically and physically?
TL432BCDBVR and TL431BCDBVR share identical electrical specifications-including 0.5% Vref tolerance, −40°C to 125°C operation, and 0.2 Ω dynamic impedance-but differ exclusively in pinout: TL432BCDBVR uses CATHODE–REF–ANODE (Pin 1–2–3), while TL431BCDBVR uses REF–ANODE–CATHODE. No PCB redesign permits interchangeability.
What is the minimum cathode current required for regulation in TL432BCDBVR?
The TL432BCDBVR requires a minimum cathode current of 0.4 mA to maintain regulation, as confirmed in Section 6.11 (Electrical Characteristics, TL432BC) of the TI datasheet. This value holds across the full −40°C to 125°C temperature range and ensures stable operation even under light-load conditions.
Can TL432BCDBVR be used in place of a Zener diode in linear regulator feedback?
Yes, TL432BCDBVR replaces Zener diodes in feedback networks with superior performance: its 0.5% tolerance, 14 mV max temp drift, and 0.2 Ω dynamic impedance deliver tighter output regulation and better transient response than standard Zeners. It requires only two external resistors to set output voltage from 2.5 V to 36 V.
What is the maximum cathode voltage rating for TL432BCDBVR?
The absolute maximum cathode voltage (VKA) for TL432BCDBVR is 37 V, referenced to the ANODE pin. The recommended operating range is Vref to 36 V per Section 6.4 of the datasheet. Exceeding 37 V risks permanent damage, and operation above 36 V violates recommended conditions even if within absolute max limits.
TL432BCDBVR 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:
- ±0.5%
- 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
TL432BCDBVR FAQ
1.How can I place an order for TL432BCDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432BCDBVR 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 TL432BCDBVR reliable?
The price and inventory of TL432BCDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432BCDBVR is usually 5 days.
3.What payment methods are accepted for TL432BCDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432BCDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432BCDBVR?
TL432BCDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432BCDBVR 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 TL432BCDBVR?
For technical support, including TL432BCDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432BCDBVR requirements.
6.How does Aetrix verify that TL432BCDBVR is sourced from the original manufacturer or authorized distributors?
All TL432BCDBVR 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 TL432BCDBVR meets industry standards.
7.What is the process for return or replacement of TL432BCDBVR?
All TL432BCDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TL432BCDBVR, 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 TL432BCDBVR part is unused and in its original packaging.
Return procedure for TL432BCDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432BCDBVR 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…
