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Texas Instruments TL432BIDBZTG4
- Part No.:
- TL432BIDBZTG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL432BIDBZTG4.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,731
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Product details
Overview
TL432BIDBZTG4 from Texas Instruments is a precision programmable shunt voltage reference in SOT-23-3 package, delivering 2.495 V nominal reference voltage with ±0.5% initial tolerance at 25°C, −40°C to +125°C operating range, and 0.2 Ω typical dynamic impedance. It serves as a high-stability replacement for Zener diodes in feedback loops of isolated DC/DC converters and industrial power supplies.
For engineers reviewing the TL432BIDBZTG4 datasheet, TL432BIDBZTG4 pinout, TL432BIDBZTG4 application, or TL432BIDBZTG4 equivalent, key selection criteria include its Q-grade temperature rating, DBZ package pin compatibility with TL431 variants (reversed REF/CATHODE/ANODE order), low 14 mV max reference voltage drift over full temperature range, and sink-current capability from 1 mA to 100 mA.
Technical Context
The TL432BIDBZTG4 implements an adjustable shunt regulator architecture with an internal error amplifier comparing REF pin voltage to a 2.495 V bandgap reference. Its output stage sinks cathode current (IKA) proportional to the REF-to-ANODE voltage deviation, enabling precise regulation across 2.5 V to 36 V via two external resistors.
Unlike the TL431, the TL432 family uses a distinct pinout in DBZ packages: Pin 1 = CATHODE, Pin 2 = REF, Pin 3 = ANODE - reversing the TL431's DBZ configuration. This variant maintains identical electrical specifications but requires PCB layout revision when substituting for TL431-based designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.495 V ±12.5 mV (B grade, 25°C); sets precise feedback threshold for power supply regulation |
| Initial Tolerance | ±0.5% at 25°C; enables high-accuracy output voltage setting without trimming |
| Temp Range | −40°C to +125°C (Q grade); supports operation in automotive under-hood and industrial motor drive environments |
| Dynamic Impedance | 0.2 Ω typical; ensures stable regulation under fast load transients in switching power supplies |
| Sink Current Range | 1 mA to 100 mA; accommodates wide feedback loop gain and compensation network design margins |
| Ref Input Current | 2–4 µA; minimizes resistor-divider loading error in high-impedance voltage-setting networks |
| Voltage Drift | ≤14 mV over full temperature range; guarantees ≤0.56% output variation across −40°C to +125°C |
Pinout & Package
SOT-23-3 (DBZ) package: 2.90 mm × 1.30 mm body, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (CATHODE) | Shunt current input | Connects to regulated output node; sinks current to maintain REF voltage at setpoint |
| Pin 2 (REF) | Reference input | High-impedance sense node; compares against internal 2.495 V reference to control cathode current |
| Pin 3 (ANODE) | Common return | Typically connected to system ground or power return path; defines voltage reference point for REF pin |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage | 2.5 V to 36 V via external resistor divider; eliminates need for multiple fixed-voltage references |
| Low output noise | ≤260 nV/√Hz at 1 kHz; preserves signal integrity in precision analog feedback paths |
| Sharp turn-on characteristic | Fast response to REF voltage deviations; enables stable regulation in high-bandwidth SMPS control loops |
| Thermal stability | Guaranteed 14 mV max VI(dev) over −40°C to +125°C; reduces calibration burden in wide-temp applications |
| ESD robustness | ±2000 V HBM; withstands handling and board assembly stresses without parameter shift |
Applications
| Rack Server Power | Industrial AC/DC Converter |
|---|---|
Use Scenario: Secondary-side voltage feedback in isolated 48 V–12 V DC/DC modules for telecom/datacom rack systems. IC Role / Device Role / Timing Role: Shunt reference providing precise 12 V output regulation via optocoupler-coupled feedback loop. Use Value: ±0.5% initial tolerance and 14 mV temp drift ensure <±1% total output variation across thermal cycling and line/load changes. | Use Scenario: Output voltage sensing in 3 kW industrial AC/DC front-end supplies with active PFC and LLC resonant stages. IC Role / Device Role / Timing Role: Precision shunt reference in secondary-side synchronous rectifier controller feedback network. Use Value: 0.2 Ω dynamic impedance maintains loop stability despite wide output current range (10–250 A) and EMI-filter-induced phase shifts. |
| AC Inverter Drive | Servo Drive Control Module |
Use Scenario: DC bus voltage monitoring and protection circuitry in 7.5 kW variable-frequency drives for HVAC and pumps. IC Role / Device Role / Timing Role: Reference element in overvoltage detection comparator with hysteresis. Use Value: −40°C to +125°C Q-grade rating ensures reliable trip-point accuracy across motor enclosure ambient extremes. | Use Scenario: Isolated auxiliary supply regulation for gate drivers and position encoder interfaces in robotic servo amplifiers. IC Role / Device Role / Timing Role: Shunt reference in flyback-derived 5 V/150 mA bias supply with reinforced isolation. Use Value: Low 2–4 µA REF input current minimizes divider power loss while maintaining <0.1% setting error at 100 kΩ total resistance. |
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 (Pin 1=REF, Pin 2=CATHODE, Pin 3=ANODE) | Requires PCB layout change due to reversed REF/CATHODE pins; identical electrical behavior otherwise | Select when reusing existing TL431-based schematics and layouts with minor pinout adaptation |
| TLVH431BQDBZR | Lower 1.24 V reference voltage, 1% initial tolerance, same Q-temp range and DBZ package | Not suitable for >2.5 V output regulation; used where lower reference voltage simplifies resistor ratios or enables ultra-low-voltage rails | Select when designing new 1.24 V–18 V adjustable supplies and lower accuracy is acceptable |
Compared with TL431BIDBZR, TL432BIDBZTG4 offers identical performance but mandates pinout-aware layout; versus TLVH431BQDBZR, it provides higher reference voltage and tighter tolerance at the cost of reduced minimum output voltage flexibility.
Availability
TL432BIDBZTG4 is available at Aetrix Electronics and suitable for rack server power, industrial AC/DC converters, and servo drive control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL432BIDBZTG4 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 specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability components.
The TL43x family was designed for precision voltage regulation in feedback networks of isolated and non-isolated power converters, targeting industrial, automotive, and computing applications demanding high accuracy and thermal stability.
FAQ
What is the reference voltage tolerance of TL432BIDBZTG4 at 25°C?
The TL432BIDBZTG4 has a reference voltage tolerance of ±0.5% at 25°C, corresponding to a 2.495 V nominal value with a maximum deviation of ±12.5 mV. This B-grade specification is confirmed in Section 6.11 of the TI SLVS543S datasheet for TL432BQ devices and applies directly to TL432BIDBZTG4 as a Q-grade, B-tolerance variant in DBZ packaging.
How does the TL432BIDBZTG4 pinout differ from TL431 in SOT-23-3?
The TL432BIDBZTG4 uses Pin 1 = CATHODE, Pin 2 = REF, Pin 3 = ANODE in the DBZ package, whereas the TL431 DBZ variant uses Pin 1 = REF, Pin 2 = CATHODE, Pin 3 = ANODE. This reversal is explicitly documented in Figure 5-1 and Table 5-1 of the TI datasheet and requires PCB layout modification when replacing TL431 designs with TL432BIDBZTG4.
What is the maximum temperature drift specification for TL432BIDBZTG4?
The TL432BIDBZTG4 exhibits a maximum reference voltage deviation (VI(dev)) of 14 mV over its full −40°C to +125°C operating range, as specified for TL432BQ devices in Section 6.13 of the TI datasheet. This corresponds to ≤0.56% variation relative to the 2.495 V nominal reference and is validated across all Q-grade TL432 variants including TL432BIDBZTG4.
Can TL432BIDBZTG4 replace TL431 in existing designs without changes?
No - TL432BIDBZTG4 cannot be a drop-in replacement for TL431 in DBZ packages due to reversed pinout (CATHODE/REF swap). While electrical specs match exactly, direct substitution requires PCB layout revision to route CATHODE and REF signals to correct pins. The device is functionally identical but mechanically incompatible without board modification.
What is the dynamic impedance of TL432BIDBZTG4 and why does it matter?
The TL432BIDBZTG4 has a typical dynamic impedance of 0.2 Ω, defined as |ZKA| = ΔVKA/ΔIKA at frequencies ≤1 kHz and cathode currents from 1 mA to 100 mA. This low value ensures minimal output voltage perturbation during rapid load transients, directly supporting stable regulation in high-frequency switching power supplies where loop bandwidth exceeds 10 kHz.
TL432BIDBZTG4 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
TL432BIDBZTG4 FAQ
1.How can I place an order for TL432BIDBZTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432BIDBZTG4 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 TL432BIDBZTG4 reliable?
The price and inventory of TL432BIDBZTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432BIDBZTG4 is usually 5 days.
3.What payment methods are accepted for TL432BIDBZTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL432BIDBZTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL432BIDBZTG4?
TL432BIDBZTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432BIDBZTG4 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 TL432BIDBZTG4?
For technical support, including TL432BIDBZTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432BIDBZTG4 requirements.
6.How does Aetrix verify that TL432BIDBZTG4 is sourced from the original manufacturer or authorized distributors?
All TL432BIDBZTG4 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 TL432BIDBZTG4 meets industry standards.
7.What is the process for return or replacement of TL432BIDBZTG4?
All TL432BIDBZTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL432BIDBZTG4, 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 TL432BIDBZTG4 part is unused and in its original packaging.
Return procedure for TL432BIDBZTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432BIDBZTG4 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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