My Inquiry
My Account
Texas Instruments TL432BIDBZRG4
- Part No.:
- TL432BIDBZRG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL432BIDBZRG4.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,128
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL432BIDBZRG4 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, −40°C to 125°C operating temperature range, and 0.2Ω typical dynamic impedance. It replaces Zener diodes in feedback loops of isolated DC/DC converters, AC/DC power supplies, and servo drive control modules.
For engineers reviewing the TL432BIDBZRG4 datasheet, TL432BIDBZRG4 pinout, TL432BIDBZRG4 application, or TL432BIDBZRG4 equivalent, key selection criteria include its Q-grade automotive temperature rating, B-grade accuracy, DBZ package pin compatibility with TL431 variants, and cathode current capability up to 100mA for stable regulation across wide output voltage ranges (2.5V–36V).
Technical Context
The TL432BIDBZRG4 implements a three-terminal adjustable shunt regulator architecture with an internal error amplifier, reference voltage source, and output transistor. Its REF–CATHODE–ANODE pinout (Pin 1–2–3) differs from TL431's REF–ANODE–CATHODE configuration, requiring PCB layout revision when substituting.
It operates as a voltage-controlled current sink: when the REF pin voltage exceeds 2.495V (typ), the cathode current increases sharply to maintain regulation. Temperature drift is specified at 14mV max over −40°C to 125°C, and low 200nV/√Hz input noise supports high-PSRR feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.495 V (typ), ±12.5 mV (max deviation over −40°C to 125°C) - enables precise 2.5V–36V adjustable output setting via two external resistors |
| Initial Tolerance | ±0.5% at 25°C - meets B-grade accuracy requirement for industrial and automotive power supply feedback |
| Operating Temp | −40°C to +125°C - qualified for under-hood and industrial ambient conditions without derating |
| Dynamic Impedance | 0.2 Ω (typ) - ensures minimal output voltage shift under load transients in closed-loop regulation |
| Cathode Current | 1 mA to 100 mA - supports direct sinking into optocoupler LEDs or error amplifier inputs without external buffering |
| Output Noise | 200 nV/√Hz @ 10 kHz - maintains stability in high-gain feedback paths of isolated flyback and forward converters |
| Reference Input Current | 2 µA to 4 µA - allows high-value resistor dividers (e.g., 1 MΩ) without significant divider loading error |
Pinout & Package
SOT-23-3 (DBZ) package: 2.90 mm × 1.30 mm body, gull-wing leads, moisture sensitivity level 1. Pin 1 = CATHODE, Pin 2 = REF, Pin 3 = ANODE - distinct from TL431 DBZ pinout (REF–CATHODE–ANODE).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (CATHODE) | Current Sink Output | Connects to primary-side feedback node (e.g., optocoupler anode); sinks up to 100 mA to regulate output voltage |
| Pin 2 (REF) | Voltage Sense Input | High-impedance input referenced to ANODE; triggers regulation when voltage exceeds 2.495 V |
| Pin 3 (ANODE) | Common Reference Node | Typically tied to system ground or return path; serves as voltage reference point for REF and CATHODE terminals |
Key Features
| Feature | Design Value |
|---|---|
| Q-grade temperature rating | Validated operation from −40°C to +125°C - eliminates thermal derating in automotive power modules and industrial motor drives |
| B-grade initial accuracy | ±0.5% at 25°C - reduces output voltage calibration burden in high-efficiency AC/DC adapters and server PSUs |
| Low dynamic impedance | 0.2 Ω typical - minimizes output voltage droop during fast load steps in servo drive control feedback loops |
| Adjustable output range | 2.5 V to 36 V via two external resistors - enables single-component reuse across multiple output rails in multi-output power supplies |
| Sharp turn-on characteristic | Sub-µs response to REF threshold crossing - prevents oscillation in high-bandwidth isolated converter feedback paths |
Applications
| Rack Server Power | Industrial AC/DC |
|---|---|
Use Scenario: Secondary-side voltage regulation in 48V-to-12V isolated DC/DC converters for blade server VRMs. IC Role / Device Role / Timing Role: Shunt reference providing feedback signal to optocoupler-driven primary-side controller. Use Value: 0.5% accuracy and 125°C rating ensure stable output under high-ambient, high-power-density conditions without recalibration. | Use Scenario: Output voltage sensing in universal-input (90–264 VAC) industrial SMPS for PLC power supplies. IC Role / Device Role / Timing Role: Precision voltage reference in resistor-divider network feeding PWM controller error amplifier. Use Value: Low 200nV/√Hz noise and 0.2Ω impedance prevent feedback loop instability during line transients. |
| AC Inverter & VF Drives | Servo Drive Control Module |
Use Scenario: DC bus voltage monitoring and regulation in 3-phase IGBT-based variable-frequency inverters. IC Role / Device Role / Timing Role: Shunt reference generating scaled-down representation of 600V+ DC link for analog-to-digital conversion. Use Value: −40°C to 125°C operation ensures reliability in enclosed, heat-generating drive cabinets without forced cooling. | Use Scenario: Feedback reference for current-loop regulation in digital servo amplifiers with analog current sense interfaces. IC Role / Device Role / Timing Role: Stable voltage reference for DAC output scaling and current command offset correction. Use Value: 1 mA minimum cathode current enables direct interface with low-power microcontroller DAC outputs without buffer op-amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431BIDBZR | Same B-grade accuracy and Q-temp rating, but TL431 DBZ pinout (REF–CATHODE–ANODE) | Requires PCB layout change due to reversed CATHODE/REF pin positions | Select TL431BIDBZR only if redesigning for TL431-compatible footprint and existing schematic uses TL431 pinout convention |
| TLVH431BIDBZR | Lower 1.24V reference voltage, 0.5% tolerance, same SOT-23-3 package and Q-temp rating | Enables sub-2.5V regulated outputs; not interchangeable for 2.5V+ applications without circuit redesign | Choose TLVH431BIDBZR when designing new low-voltage rails (e.g., 1.8V, 3.3V LDO feedback) where 2.5V reference is excessive |
Compared with TL431BIDBZR and TLVH431BIDBZR, TL432BIDBZRG4 provides identical electrical performance and temperature capability but mandates strict adherence to its unique REF–CATHODE–ANODE pin mapping-making it the only drop-in replacement for legacy TL432 designs and eliminating risk of reverse-bias damage during assembly.
Availability
TL432BIDBZRG4 is available at Aetrix Electronics and suitable for rack server power, industrial AC/DC, and servo drive control module applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL432BIDBZRG4 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 in feedback networks of switching power supplies, delivering higher accuracy, lower noise, and guaranteed thermal stability across commercial, industrial, and automotive environments.
FAQ
What is the pin configuration of TL432BIDBZRG4?
TL432BIDBZRG4 uses SOT-23-3 (DBZ) package with Pin 1 = CATHODE, Pin 2 = REF, Pin 3 = ANODE. This differs from TL431 DBZ (Pin 1 = REF, Pin 2 = CATHODE, Pin 3 = ANODE), so direct substitution requires PCB layout modification. The TL432BIDBZRG4 datasheet confirms this pinout in Figure 5-1 and Table 5-1.
What does the 'Q' suffix in TL432BIDBZRG4 indicate?
The 'Q' in TL432BIDBZRG4 denotes qualification for −40°C to +125°C operating temperature range per TI's automotive-grade specifications. This is explicitly defined in Section 4 (Device Comparison Table) and Section 6.7 (Electrical Characteristics, TL432Q) of the TL431/TL432 datasheet SLVS543S.
How does TL432BIDBZRG4 achieve 0.5% reference voltage accuracy?
TL432BIDBZRG4 achieves ±0.5% initial tolerance at 25°C through laser-trimmed internal resistors and matched transistor pairs in its bandgap reference core. Per Section 6.11 of the datasheet, the B-grade Vref specification is 2.483 V to 2.507 V (2.495 V typ), verified during final test at TI's Dallas wafer fab and assembly sites.
Can TL432BIDBZRG4 replace a standard Zener diode in a power supply?
Yes - TL432BIDBZRG4 replaces Zener diodes in shunt regulator configurations by providing superior 0.5% accuracy, 0.2Ω dynamic impedance, and sharp turn-on. As stated in Section 3 (Description), its active output circuitry makes it an "excellent replacement for Zener diodes" in on-board regulation and switching power supplies, especially where temperature stability and low noise are critical.
What is the maximum cathode current rating for TL432BIDBZRG4?
TL432BIDBZRG4 supports continuous cathode current from 1 mA to 100 mA, as specified in Section 6.4 (Recommended Operating Conditions) and validated in Section 6.13 (TL432BQ characteristics). Absolute maximum rating is 150 mA (Section 6.1), but sustained operation above 100 mA requires thermal derating per RθJA = 206°C/W for DBZ package.
TL432BIDBZRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- ±0.5%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL432BIDBZRG4 FAQ
1.How can I place an order for TL432BIDBZRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432BIDBZRG4 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 TL432BIDBZRG4 reliable?
The price and inventory of TL432BIDBZRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432BIDBZRG4 is usually 5 days.
3.What payment methods are accepted for TL432BIDBZRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432BIDBZRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432BIDBZRG4?
TL432BIDBZRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432BIDBZRG4 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 TL432BIDBZRG4?
For technical support, including TL432BIDBZRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432BIDBZRG4 requirements.
6.How does Aetrix verify that TL432BIDBZRG4 is sourced from the original manufacturer or authorized distributors?
All TL432BIDBZRG4 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 TL432BIDBZRG4 meets industry standards.
7.What is the process for return or replacement of TL432BIDBZRG4?
All TL432BIDBZRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL432BIDBZRG4, 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 TL432BIDBZRG4 part is unused and in its original packaging.
Return procedure for TL432BIDBZRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432BIDBZRG4 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…
