My Inquiry
My Account
Texas Instruments TL432ACDBZRG4
- Part No.:
- TL432ACDBZRG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL432ACDBZRG4.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,441
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL432ACDBZRG4 from Texas Instruments is a precision adjustable shunt voltage reference in SOT-23-3 package, featuring 1% initial tolerance at 25°C, 2.47–2.52 V reference voltage, and operation across −40°C to 85°C. It delivers 0.2 Ω dynamic impedance, 1–100 mA sink-current capability, and low 6–16 mV temperature drift-enabling accurate feedback in isolated DC/DC converters and industrial power supplies.
For engineers reviewing the TL432ACDBZRG4 datasheet, TL432ACDBZRG4 pinout, TL432ACDBZRG4 application, or TL432ACDBZRG4 equivalent, this page provides verified electrical specs, thermal behavior, stability boundaries, real-world use cases in AC/DC and servo drives, and validated alternative parts for design continuity and sourcing flexibility.
Technical Context
The TL432ACDBZRG4 implements a three-terminal shunt regulator architecture with an internal error amplifier, reference comparator, and NPN output stage. Its REF–ANODE–CATHODE pinout (Pin 1 = REF, Pin 2 = CATHODE, Pin 3 = ANODE) differs from TL431, requiring board-level layout adaptation when substituting.
It operates as a programmable 2.5 V reference with external resistor divider feedback, supporting output voltages from 2.5 V up to 36 V. The device maintains regulation down to 0.4–0.6 mA cathode current and exhibits sharp turn-on characteristics ideal for replacing Zener diodes in closed-loop feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.47–2.52 V at 25°C - sets precise feedback threshold for power supply regulation |
| Initial Tolerance | ±1% at 25°C (A grade) - enables tight output voltage control without post-production trimming |
| Temp Range | −40°C to +85°C (I grade) - supports industrial ambient conditions without derating |
| Dynamic Impedance | 0.2 Ω typical - ensures stable reference under fast load transients in switching regulators |
| Sink Current Range | 1–100 mA - accommodates wide feedback loop gain and compensation network design margins |
| Temp Drift (VI(dev)) | 14–34 mV over full range - quantifies worst-case reference deviation in servo drive temperature cycling |
| Min Cathode Current | 0.4–0.6 mA - defines lowest operating point before regulation loss in low-power standby modes |
Pinout & Package
SOT-23-3 (DBZ) package: 2.90 mm × 1.30 mm body, gull-wing leads, JEDEC MO-178 compatible. Thermal resistance RθJA = 206°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (REF) | Reference Input | High-impedance input sensing voltage divider node; connects to feedback network midpoint |
| Pin 2 (CATHODE) | Shunt Output | Sinks regulated current into primary-side controller or optocoupler LED; carries full feedback loop current |
| Pin 3 (ANODE) | Common Return | Typically tied to system ground or secondary-side return; establishes reference potential for REF pin |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Range | 2.5 V to 36 V via two-resistor divider - eliminates need for multiple fixed references in multi-rail systems |
| Low Output Noise | Sub-20 µVPP (0.1–10 Hz), <100 nV/√Hz (1 kHz) - preserves signal integrity in high-PSRR LDO feedback paths |
| Sharp Turn-On Characteristic | Fast response with <1 µs pulse rise time - prevents instability during line/load transients in flyback controllers |
| Stability Boundary Data | Published CL vs. IKA oscillation maps (Fig 6-18) - enables robust capacitor selection without empirical tuning |
| ESD Robustness | ±2000 V HBM - withstands handling in non-EPA assembly environments without added protection |
Applications
| Rack Server Power | Industrial AC/DC |
|---|---|
Use Scenario: Primary-side feedback in 1–3 kW telecom rectifiers with digital PMBus control. IC Role / Device Role / Timing Role: Shunt reference providing isolated voltage sense signal to PWM controller via optocoupler. Use Value: ±1% tolerance and 14–34 mV temp drift ensure <±1.5% output regulation across 0–85°C ambient without calibration. |
Use Scenario: Secondary-side regulation in DIN-rail mounted 24 V/48 V industrial PSUs. IC Role / Device Role / Timing Role: Precision reference for TL432-based error amplifier driving synchronous rectifier gate driver. Use Value: 0.2 Ω dynamic impedance minimizes load-induced reference shift during motor startup surges. |
| AC Inverter & VF Drives | Servo Drive Control Module |
Use Scenario: DC bus voltage monitoring and overvoltage protection threshold in 3-phase inverters. IC Role / Device Role / Timing Role: Programmable trip point generator feeding comparator input in safety-critical protection circuitry. Use Value: Stable 2.5 V reference enables repeatable 750 V DC bus OV detection with <±2 V hysteresis margin. |
Use Scenario: Feedback reference for torque/current loop amplifiers in closed-loop servo amplifiers. IC Role / Device Role / Timing Role: Low-noise voltage reference for DAC output buffering and current-sense amplifier offset correction. Use Value: Sub-20 µVPP low-frequency noise prevents torque ripple at <10 Hz mechanical resonance frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBZR | Same A-grade tolerance and I-temp range, but TL431 pinout (REF–ANODE–CATHODE) - requires PCB redesign | Identical electrical performance; used where legacy TL431 layouts exist and re-spin is acceptable | Select only if board revision allows pinout change; avoid in drop-in replacement scenarios |
| LM4040CIM3-2.5/NOPB | Fixed 2.5 V output, ±0.5% tolerance, 75 ppm/°C drift, 60 µA max quiescent current - no external resistors needed | Not adjustable; suited for low-current, space-constrained biasing-not for programmable feedback loops | Choose when output voltage is fixed and cathode current <1 mA; unsuitable for >2.5 V or >10 mA applications |
Compared with TL432ACDBZRG4, TL431ACDBZR demands layout changes due to reversed ANODE/CATHODE pins, while LM4040CIM3-2.5/NOPB trades adjustability and sink capability for tighter tolerance and lower IQ-making it viable only in fixed-voltage, low-power roles.
Availability
TL432ACDBZRG4 is available at Aetrix Electronics and suitable for rack server power, industrial AC/DC, and servo drive control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL432ACDBZRG4 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 delivering analog, embedded processing, and connectivity solutions with focus on reliability, longevity, and industrial-grade qualification.
The TL43x family was designed specifically for precision voltage regulation in power conversion feedback loops-targeting high-volume industrial, telecom, and motor control applications where cost, stability, and manufacturability are critical.
FAQ
What is the exact pin configuration of TL432ACDBZRG4?
TL432ACDBZRG4 uses SOT-23-3 (DBZ) package with Pin 1 = REF, Pin 2 = CATHODE, Pin 3 = ANODE. This differs from TL431's REF–ANODE–CATHODE order, so direct substitution requires PCB layout modification to avoid misconnection and functional failure.
Does TL432ACDBZRG4 support operation above 85°C?
No. TL432ACDBZRG4 is rated for −40°C to +85°C (I grade). For operation up to 125°C, select TL432AQ or TL432BQ variants-these carry Q-grade qualification and higher VI(dev) drift (14–34 mV), but share identical pinout and electrical specs at 25°C.
What is the minimum cathode current required for regulation in TL432ACDBZRG4?
TL432ACDBZRG4 requires 0.4–0.6 mA minimum cathode current (Imin) to maintain regulation. Below this, the reference voltage collapses; this value is critical for designing feedback networks in low-power standby or light-load conditions.
Can TL432ACDBZRG4 replace a Zener diode directly?
Yes-TL432ACDBZRG4 functions as a superior Zener replacement: it offers sharper knee, lower dynamic impedance (0.2 Ω vs. typical 10–100 Ω), adjustable voltage, and better temperature stability. However, its three-terminal topology requires explicit REF node connection, unlike two-terminal Zeners.
How does TL432ACDBZRG4 handle capacitive loads in feedback networks?
TL432ACDBZRG4 exhibits defined stability boundaries (Fig 6-18 in datasheet): oscillation risk increases with >100 nF capacitance at >10 mA cathode current. Use series resistance (≥100 Ω) between CATHODE and capacitor, or limit CL to ≤10 nF for unconditional stability in most designs.
TL432ACDBZRG4 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:
- ±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-23-3
TL432ACDBZRG4 FAQ
1.How can I place an order for TL432ACDBZRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432ACDBZRG4 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 TL432ACDBZRG4 reliable?
The price and inventory of TL432ACDBZRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432ACDBZRG4 is usually 5 days.
3.What payment methods are accepted for TL432ACDBZRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432ACDBZRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432ACDBZRG4?
TL432ACDBZRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432ACDBZRG4 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 TL432ACDBZRG4?
For technical support, including TL432ACDBZRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432ACDBZRG4 requirements.
6.How does Aetrix verify that TL432ACDBZRG4 is sourced from the original manufacturer or authorized distributors?
All TL432ACDBZRG4 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 TL432ACDBZRG4 meets industry standards.
7.What is the process for return or replacement of TL432ACDBZRG4?
All TL432ACDBZRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL432ACDBZRG4, 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 TL432ACDBZRG4 part is unused and in its original packaging.
Return procedure for TL432ACDBZRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432ACDBZRG4 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…
