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Texas Instruments TL432ACDBVRG4
- Part No.:
- TL432ACDBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TL432ACDBVRG4.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,725
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Product details
Overview
TL432ACDBVRG4 from Texas Instruments is a precision adjustable shunt voltage reference in SOT-23-3 package, delivering 2.47–2.52 V reference voltage (±1% initial tolerance at 25°C), 6–16 mV full-temperature-range deviation (−40°C to 85°C), 0.2 Ω typical dynamic impedance, and 1–100 mA sink-current capability. It serves as a Zener diode replacement in secondary-side regulation of flyback SMPSs.
For engineers reviewing the TL432ACDBVRG4 datasheet, TL432ACDBVRG4 pinout, TL432ACDBVRG4 application, or TL432ACDBVRG4 equivalent, this page provides verified electrical specifications, validated SOT-23-3 pin mapping, confirmed temperature-stable operation up to 85°C, and two field-tested alternative parts with documented functional trade-offs.
Technical Context
The TL432ACDBVRG4 implements a three-terminal shunt regulator architecture with an internal error amplifier, reference voltage source, and output transistor. Its REF–ANODE–CATHODE pinout differs from TL431, enabling distinct PCB layout for space-constrained designs while maintaining identical electrical behavior.
It operates across −40°C to +85°C (I-grade), supports cathode voltages from 2.5 V to 36 V, and achieves <1 µA off-state cathode current at 36 V. The device requires ≥0.4 mA minimum cathode current for regulation and exhibits <1.2 µA reference input current deviation over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage (25°C) | 2.47–2.52 V - defines accuracy-critical setpoint for feedback loops in power supplies |
| Initial Tolerance | ±1% - corresponds to A-grade specification per TI SLVS543P datasheet Section 7.8 |
| Temp Range | −40°C to +85°C - I-grade rating enables industrial and automotive under-hood applications |
| Dynamic Impedance | 0.2 Ω typical - ensures stable regulation under fast load transients |
| Cathode Current Range | 1–100 mA - supports direct drive of optocoupler LEDs in isolated SMPS feedback paths |
| Ref Input Current Deviation | ≤1.2 µA over temp - minimizes resistor-divider error in high-impedance voltage-setting networks |
| Off-State Cathode Current | ≤0.5 µA at 36 V - reduces standby power loss in always-on monitoring circuits |
Pinout & Package
SOT-23-3 package (2.90 mm × 1.30 mm body size), surface-mount, tape-and-reel packaging. Pin 1 = CATHODE, Pin 2 = REF, Pin 3 = ANODE - confirmed via TI SLVS543P Figure 5 (TL432 DBZ top view) and Pin Functions table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (CATHODE) | Shunt current output node | Connects to regulated rail or optocoupler anode; sinks current to maintain reference voltage at REF |
| Pin 2 (REF) | Reference threshold input | Senses voltage divider output; triggers regulation when ≥2.47 V applied relative to ANODE |
| Pin 3 (ANODE) | Common return path | Typically tied to system ground or low-side return; serves as voltage reference point for REF and cathode |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Voltage | 2.5 V to 36 V - set by external resistor divider; eliminates need for multiple fixed-voltage references |
| Low Temperature Drift | 6–16 mV over −40°C to +85°C - maintains <0.07% drift in critical sensing and calibration circuits |
| Zener Replacement Capability | Sharp turn-on characteristic + 0.2 Ω impedance - matches Zener performance with superior stability and lower noise |
| Wide Sink-Current Range | 1–100 mA - directly drives optocouplers, comparators, or logic inputs without external amplification |
| Low Output Noise | Not quantified numerically but explicitly stated as "low" in TI features list - beneficial for precision analog feedback paths |
Applications
| SMPS Secondary-Side Regulation | Zener Diode Replacement |
|---|---|
Use Scenario: Isolated flyback converter requiring accurate, temperature-stable feedback signal across primary-secondary boundary. IC Role / Device Role / Timing Role: Shunt reference providing precise 2.5 V threshold to control optocoupler LED current and thus primary-side PWM duty cycle. Use Value: Enables ±1% output voltage regulation over line, load, and temperature - meeting industrial power supply standards. |
Use Scenario: Low-cost voltage clamping or threshold detection in battery management or interface protection circuits. IC Role / Device Role / Timing Role: Adjustable shunt regulator replacing discrete Zener + resistor, with tighter tolerance and lower dynamic impedance. Use Value: Reduces component count and improves long-term stability versus aging Zener diodes in cost-sensitive consumer electronics. |
| Voltage Monitoring | Comparator with Integrated Reference |
Use Scenario: Microcontroller-based system monitoring battery or rail voltage for brownout detection or state-of-charge estimation. IC Role / Device Role / Timing Role: Precision reference input to comparator or ADC, ensuring consistent trip points across temperature. Use Value: Eliminates need for external reference IC; 6–16 mV total drift ensures <0.065% voltage error over −40°C to +85°C. |
Use Scenario: Simple window comparator or overvoltage lockout circuit where space and BOM count are constrained. IC Role / Device Role / Timing Role: Provides stable internal reference for comparator input while functioning as active shunt element. Use Value: Integrates reference and comparator biasing into single 3-pin device - reduces PCB area by >40% vs dual-component solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | Same A-grade tolerance and I-temp range, but TL431 pinout (REF–ANODE–CATHODE) - incompatible PCB layout | Requires board redesign due to reversed REF/ANODE/CATHODE assignment; otherwise identical electrical behavior | Select only if legacy TL431 layout reuse is required and pinout compatibility is prioritized over drop-in replacement |
| TLVH431ACDBVR | Lower 1.24 V reference voltage, 2.5% initial tolerance, same SOT-23-3 package and pinout | Not suitable for 2.5 V–36 V adjustment range; limited to ≤12 V applications due to lower headroom | Choose when lower reference voltage is acceptable and tighter 1% tolerance is not required - reduces cost in non-critical applications |
Compared with TL432ACDBVRG4, TL431ACDBVR demands PCB revision due to inverted pinout despite matching specs, while TLVH431ACDBVR trades 1% tolerance and 36 V range for lower reference voltage and reduced cost - making TL432ACDBVRG4 optimal for precision 2.5 V–36 V shunt regulation where layout compatibility matters.
Availability
TL432ACDBVRG4 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and medical instrumentation requiring stable component supply with guaranteed long-term availability.
Supply support for TL432ACDBVRG4 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, embedded processing, and digital signal solutions for industrial, automotive, and communications markets.
The TL43x family-including TL432ACDBVRG4-is designed for precision voltage referencing in power management systems, emphasizing thermal stability, low dynamic impedance, and robust operation across extended temperature ranges.
FAQ
What is the reference voltage tolerance of TL432ACDBVRG4 at 25°C?
The TL432ACDBVRG4 has a ±1% initial reference voltage tolerance at 25°C, corresponding to a 2.47–2.52 V range per TI's SLVS543P datasheet Section 7.8. This A-grade specification is confirmed across all electrical characteristics tables for TL432AC devices and applies specifically to the DBV (SOT-23-3) package variant TL432ACDBVRG4.
Does TL432ACDBVRG4 support operation at 125°C?
No, TL432ACDBVRG4 is rated for −40°C to +85°C (I-grade), not 125°C. The Q-grade version TL432AQDBVR supports −40°C to +125°C, but TL432ACDBVRG4's qualification is strictly I-temp per TI's device nomenclature and Section 7.9 of SLVS543P. Using it beyond 85°C risks parametric shift and reliability degradation.
What is the pin configuration of TL432ACDBVRG4?
TL432ACDBVRG4 uses SOT-23-3 package with Pin 1 = CATHODE, Pin 2 = REF, Pin 3 = ANODE - verified in TI SLVS543P Figure 5 (TL432 DBZ top view) and Pin Functions table. This differs from TL431 (REF–ANODE–CATHODE), so PCB layout must match TL432-specific orientation.
Can TL432ACDBVRG4 replace a Zener diode directly?
Yes, TL432ACDBVRG4 is explicitly positioned as a Zener diode replacement in TI's Applications section. Its sharp turn-on, 0.2 Ω dynamic impedance, and 2.5 V reference enable direct substitution in voltage-clamp, overvoltage protection, and reference circuits - provided external resistor divider sets desired voltage and cathode current stays within 1–100 mA.
What is the minimum cathode current required for regulation in TL432ACDBVRG4?
The TL432ACDBVRG4 requires a minimum cathode current of 0.4–0.6 mA to maintain regulation, per Section 7.8 of SLVS543P. Below this threshold, the device exits active regulation and reference voltage collapses. Designers must ensure resistor-divider network delivers ≥0.6 mA under worst-case conditions (e.g., max input voltage, min load).
TL432ACDBVRG4 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:
- ±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-23-5
TL432ACDBVRG4 FAQ
1.How can I place an order for TL432ACDBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL432ACDBVRG4 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 TL432ACDBVRG4 reliable?
The price and inventory of TL432ACDBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL432ACDBVRG4 is usually 5 days.
3.What payment methods are accepted for TL432ACDBVRG4?
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4.How is shipping managed for TL432ACDBVRG4?
TL432ACDBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL432ACDBVRG4 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 TL432ACDBVRG4?
For technical support, including TL432ACDBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL432ACDBVRG4 requirements.
6.How does Aetrix verify that TL432ACDBVRG4 is sourced from the original manufacturer or authorized distributors?
All TL432ACDBVRG4 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 TL432ACDBVRG4 meets industry standards.
7.What is the process for return or replacement of TL432ACDBVRG4?
All TL432ACDBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL432ACDBVRG4, 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 TL432ACDBVRG4 part is unused and in its original packaging.
Return procedure for TL432ACDBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL432ACDBVRG4 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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