My Inquiry
My Account
Texas Instruments TL432IDBVRE4
- Part No.:
- TL432IDBVRE4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432IDBVRE4.pdf
- Description:
- IC VREF SHUNT ADJ 2.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,532
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL432IDBVRE4 from Texas Instruments is a precision programmable shunt voltage reference in SOT-23-5 package, delivering 2.495 V nominal reference voltage with ±0.5% initial tolerance (B grade), 0.2 Ω typical dynamic impedance, and operation across –40°C to 85°C. It replaces Zener diodes in secondary-side regulation of flyback SMPSs, adjustable power supplies, and voltage monitoring circuits.
For engineers reviewing the TL432IDBVRE4 datasheet, TL432IDBVRE4 pinout, TL432IDBVRE4 application, or TL432IDBVRE4 equivalent, this page provides verified electrical specifications, thermal behavior, real-world use cases, and validated alternative parts for design-in and supply continuity planning.
Technical Context
The TL432IDBVRE4 implements a three-terminal adjustable shunt regulator architecture with an internal error amplifier, reference, and output transistor. Its cathode-anode voltage range spans 2.5 V to 36 V, controlled via external resistor divider on the REF pin, enabling precise voltage or current referencing without external op-amps.
Unlike the TL431, the TL432 variant features a distinct pinout in DBV (SOT-23-5) packaging: Pin 1 = ANODE, Pin 2 = NC, Pin 3 = REF, Pin 4 = NC, Pin 5 = CATHODE - confirmed per TI's Device Comparison Table and Pin Configuration diagrams.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.495 V (typical at 25°C); enables accurate setpoint generation for feedback loops |
| Initial Tolerance | ±0.5% (B grade); ensures tight output voltage accuracy without trimming |
| Temp Range | –40°C to +85°C (I grade); supports industrial ambient conditions |
| Dynamic Impedance | 0.2 Ω (typical); maintains stable reference under load transients |
| Cathode Current | 1 mA to 100 mA sink capability; accommodates wide-range feedback current demands |
| Voltage Drift | 14 mV max over full temperature range; guarantees <100 ppm/°C stability in closed-loop systems |
| Ref Input Current | 2–4 µA; minimizes resistor-divider loading error in high-impedance designs |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, surface-mount, tape-and-reel delivery. Pin 2 and Pin 4 are no-connect (NC); substrate-connected Pin 2 must be left open or tied to ANODE per TI guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | ANODE | Common reference node; typically connected to system ground or return path |
| Pin 2 | NC | No internal connection; substrate tie - leave open or connect to ANODE |
| Pin 3 | REF | High-impedance input sensing point; sets output voltage via R1/R2 divider |
| Pin 4 | NC | No internal connection; electrically isolated |
| Pin 5 | CATHODE | Current-sink output terminal; delivers regulated shunt current to maintain VREF |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Voltage | 2.5 V to 36 V via two external resistors - eliminates need for multiple fixed references |
| Sharp Turn-On Characteristic | Active output stage enables fast regulation response - critical for transient-sensitive SMPS feedback |
| Low Output Noise | Enables clean reference in noise-sensitive analog signal chains and precision ADCs |
| Zener Replacement Capability | Superior thermal stability and lower drift vs. discrete Zeners - improves long-term system accuracy |
| Stable Operation at Low IKA | Regulates down to 0.4 mA cathode current - supports ultra-low-power standby modes |
Applications
| Secondary-Side Regulation | Zener Diode Replacement |
|---|---|
Use Scenario: Isolated flyback converter where primary-side controller lacks direct output sensing. IC Role / Device Role / Timing Role: Shunt reference providing optocoupler feedback voltage proportional to output rail. Use Value: Enables ±1% output regulation without auxiliary winding or complex compensation. | Use Scenario: Low-cost voltage clamping or threshold detection in battery-powered sensors. IC Role / Device Role / Timing Role: Precision shunt element replacing 2.5 V Zener with tighter tolerance and lower tempco. Use Value: Reduces calibration drift by >5× compared to standard 5% Zeners over –40°C to +85°C. |
| Voltage Monitoring | Adjustable Current Reference |
Use Scenario: Microcontroller-based power-good detection for 3.3 V or 5 V rails. IC Role / Device Role / Timing Role: Reference input to comparator detecting undervoltage lockout thresholds. Use Value: Guarantees reliable trip point accuracy within ±15 mV across temperature and line variations. | Use Scenario: Constant-current LED driver or sensor excitation circuit. IC Role / Device Role / Timing Role: Regulated shunt controlling current through external pass transistor or sense resistor. Use Value: Delivers <0.1% current variation over 10:1 load range due to 0.2 Ω dynamic impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431IDBVR | Different pinout (REF/ANODE/CATHODE on Pins 2/3/1); same electrical specs and B-grade tolerance | Requires PCB layout change - not drop-in compatible with TL432IDBVRE4 footprint | Select when redesigning for legacy TL431 layout or sourcing constraints favor SO-8/SOT-23-3 variants |
| TLVH431IDBVR | Lower 1.24 V reference voltage; higher 10 µA max Iref; 0.3 Ω dynamic impedance | Better suited for low-voltage (<3 V) systems; less ideal for 5–12 V SMPS feedback | Choose for sub-3 V applications where 1.24 V reference simplifies resistor selection and reduces divider power loss |
Compared with TL431IDBVR and TLVH431IDBVR, TL432IDBVRE4 offers identical B-grade accuracy and thermal stability but requires its unique SOT-23-5 layout; TLVH431IDBVR trades reference voltage and impedance for ultra-low-voltage operation, limiting direct substitution in mid-range power supplies.
Availability
TL432IDBVRE4 is available at Aetrix Electronics and suitable for industrial power supplies, embedded voltage monitoring systems, and isolated DC-DC converters requiring stable component supply and long-term manufacturability.
Supply support for TL432IDBVRE4 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with broad industrial, automotive, and consumer product portfolios.
The TL43x family was designed specifically for precision voltage referencing in power management feedback paths, offering programmability, stability, and robustness across extended temperature ranges.
FAQ
What is the reference voltage accuracy of TL432IDBVRE4 at 25°C?
The TL432IDBVRE4 has a ±0.5% initial reference voltage tolerance at 25°C (B grade), corresponding to a 2.495 V nominal value with ±12.5 mV absolute deviation. This specification is guaranteed per TI's Electrical Characteristics table for TL432BI devices and applies directly to TL432IDBVRE4 as an I-grade, B-tolerance variant.
How does the TL432IDBVRE4 pinout differ from TL431IDBVR in SOT-23-5 packages?
The TL432IDBVRE4 uses Pin 1 = ANODE, Pin 3 = REF, Pin 5 = CATHODE, with Pins 2 and 4 as NC. In contrast, TL431IDBVR assigns Pin 1 = CATHODE, Pin 2 = REF, Pin 3 = ANODE - making them electrically identical but mechanically incompatible without PCB redesign. This difference is explicitly documented in TI's Device Comparison Table.
Can TL432IDBVRE4 operate at 125°C ambient temperature?
No. TL432IDBVRE4 is rated for –40°C to +85°C operating free-air temperature (I grade). For 125°C operation, TI specifies the Q-grade variant (e.g., TL432BQDBVR), which undergoes extended qualification testing and carries different temperature coefficients and drift limits.
What is the minimum cathode current required for regulation in TL432IDBVRE4?
The TL432IDBVRE4 requires a minimum cathode current of 0.4 mA to maintain regulation, as specified in TI's Electrical Characteristics tables for TL432BI devices. Below this threshold, the device may exit regulation and exhibit increased output impedance and voltage error.
Is TL432IDBVRE4 RoHS-compliant and lead-free?
Yes. TL432IDBVRE4 is manufactured in TI's RoHS-compliant, lead-free SOT-23-5 (DBV) package, meeting JEDEC J-STD-020 moisture sensitivity level 1 and IPC/JEDEC J-STD-033 handling requirements. The "E4" suffix confirms lead-free finish per TI's packaging nomenclature.
TL432IDBVRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 2.495V
- Voltage - Output (Max):
- 36 V
- Current - Output:
- 100 mA
- Tolerance:
- ±2.2%
- 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-23-5
TL432IDBVRE4 FAQ
1.How can I place an order for TL432IDBVRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432IDBVRE4 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 TL432IDBVRE4 reliable?
The price and inventory of TL432IDBVRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432IDBVRE4 is usually 5 days.
3.What payment methods are accepted for TL432IDBVRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432IDBVRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432IDBVRE4?
TL432IDBVRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432IDBVRE4 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 TL432IDBVRE4?
For technical support, including TL432IDBVRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432IDBVRE4 requirements.
6.How does Aetrix verify that TL432IDBVRE4 is sourced from the original manufacturer or authorized distributors?
All TL432IDBVRE4 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 TL432IDBVRE4 meets industry standards.
7.What is the process for return or replacement of TL432IDBVRE4?
All TL432IDBVRE4 units undergo pre-shipment inspection (PSI). If there is an issue with TL432IDBVRE4, 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 TL432IDBVRE4 part is unused and in its original packaging.
Return procedure for TL432IDBVRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432IDBVRE4 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…
