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Diodes Incorporated ZTL432AQFTA
- Part No.:
- ZTL432AQFTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZTL432AQFTA.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
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Product details
Overview
ZTL432AQFTA from Diodes Incorporated is an automotive-compliant, adjustable precision shunt regulator in SOT23 package with 1% initial reference voltage tolerance (2.5 V ±1%), -40°C to +125°C operating range, 0.2 Ω typical dynamic output impedance, and 1–100 mA sink current capability. It functions as a programmable voltage reference in feedback loops of isolated DC-DC converters and linear regulators.
For engineers reviewing the ZTL432AQFTA datasheet, ZTL432AQFTA pinout, ZTL432AQFTA application, or ZTL432AQFTA equivalent, this device is selected for high-stability shunt regulation in AEC-Q100 Grade 1 automotive power supplies, optocoupler-based feedback circuits, and overvoltage protection where precise 2.5 V reference and wide temperature operation are required.
Technical Context
The ZTL432AQFTA implements a bandgap-based 2.5 V reference core with internal error amplifier and NPN output stage, configured as a three-terminal shunt regulator. Its cathode-anode voltage range extends from VREF to 20 V, supporting adjustable output voltages up to 20 V via external resistor dividers.
It features a low 0.2 Ω dynamic output impedance at 10 mA cathode current and maintains ≤34 mV reference deviation across -40°C to +125°C. The device is qualified to AEC-Q100, manufactured in IATF16949-certified facilities, and rated for PPAP compliance in automotive production programs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage (VREF) | 2.5 V ±1% at +25°C - sets minimum programmable output voltage and defines accuracy baseline for external divider networks |
| Output Voltage Range | 2.5 V to 20 V - achieved by R1/R2 divider; enables flexible regulation in 3.3 V, 5 V, 12 V, and 24 V automotive subsystems |
| Cathode Current Range | 1 mA to 100 mA - supports stable regulation across light-load standby and full-load transient conditions |
| Dynamic Output Impedance | 0.2 Ω typical - ensures minimal output voltage perturbation under fast load steps in closed-loop feedback paths |
| Temperature Range | -40°C to +125°C ambient - meets AEC-Q100 Grade 1 requirements for engine bay and ADAS module deployment |
| Reference Deviation | ≤34 mV over -40°C to +125°C - guarantees <±1.4% total reference drift without external trimming |
| ESD Rating (HBM) | 2 kV - provides robustness against handling and board-level ESD events in automotive manufacturing |
Pinout & Package
Package: SOT23 (3-pin, surface-mount), JEDEC TO-236AB compliant, 2.4 mm × 1.3 mm footprint, 0.915 mm height, green molding compound, RoHS and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Anode terminal | Connected to system ground or lowest potential node; forms return path for cathode current |
| Pin 2 (Cathode) | Cathode terminal | Connected to regulated output node; sinks current to maintain reference voltage at pin 3 |
| Pin 3 (Ref) | Reference input | High-impedance input sensing voltage divider midpoint; triggers regulation when ≥2.5 V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Grade 1 (-40°C to +125°C), PPAP-capable, manufactured in IATF16949-certified facilities - enables direct use in automotive power modules without requalification |
| Low Dynamic Impedance | 0.2 Ω typical - minimizes output voltage ripple during dynamic load changes in feedback control loops |
| Adjustable Regulation | 2.5 V to 20 V via two external resistors - eliminates need for multiple fixed-voltage references in multi-rail systems |
| Stable with Capacitive Loads | Stable with ≥4.7 nF anode–cathode capacitance - simplifies compensation in optocoupler-isolated flyback designs |
| Green Packaging | Lead-free, halogen-free, antimony-free (Br/Cl <900 ppm each, Sb <1000 ppm) - satisfies global automotive environmental compliance mandates |
Applications
| Isolated DC-DC Feedback | Automotive Linear Regulator |
|---|---|
Use Scenario: Secondary-side voltage sensing in flyback or forward converters with optocoupler isolation. IC Role / Device Role / Timing Role: Shunt regulator providing precise 2.5 V reference to optocoupler LED anode, enabling accurate primary-side duty cycle adjustment. Use Value: Maintains ±1% output regulation across temperature and line variations without secondary-side LDO, reducing BOM count and PCB area. |
Use Scenario: Precision voltage reference for automotive-grade LDOs powering infotainment microcontrollers. IC Role / Device Role / Timing Role: Adjustable reference source setting LDO output at 3.3 V or 5 V with tight tolerance and low thermal drift. Use Value: Enables stable MCU core voltage under engine-start cranking (6–16 V input) while meeting AEC-Q100 thermal stress requirements. |
| Overvoltage Protection Circuit | Optocoupler Linearization |
Use Scenario: Monitoring battery rail in 12 V vehicle systems to trigger shutdown above 15.5 V. IC Role / Device Role / Timing Role: Programmable threshold detector using cathode as open-drain alarm output tied to microcontroller interrupt pin. Use Value: Provides repeatable 15.5 V trip point with <±0.15 V error over -40°C to +125°C, eliminating discrete Zener+transistor solutions. |
Use Scenario: Improving CTR linearity in phototransistor-based optocouplers used in motor control feedback. IC Role / Device Role / Timing Role: Biasing optocoupler LED at constant current derived from regulated reference voltage. Use Value: Reduces signal distortion and gain variation across temperature, improving PWM fidelity in inverter gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL432ACDBVR | Same pinout (SOT23), 2.5 V ±0.5%, but not AEC-Q100 qualified; max cathode current 100 mA, same 0.2 Ω impedance | Commercial-grade only; unsuitable for automotive production due to lack of PPAP support and Grade 1 temp rating | Select TL432ACDBVR only for non-automotive prototypes or cost-sensitive industrial designs where qualification is not required. |
| ZTL431AQFTA | Same A-grade tolerance and automotive qualification, but SOT23 pinout differs: Ref and Cathode swapped vs. ZTL432AQFTA | Requires PCB layout change; identical electrical behavior but incompatible footprint without redesign | Choose ZTL431AQFTA only if legacy board uses its pin configuration; otherwise ZTL432AQFTA offers drop-in compatibility with newer layouts. |
Compared with TL432ACDBVR, ZTL432AQFTA adds AEC-Q100 Grade 1 qualification and PPAP readiness at no performance trade-off; versus ZTL431AQFTA, it retains identical specs but enables simplified routing with Ref on pin 3 instead of pin 2, reducing trace crossovers in dense automotive PCBs.
Availability
ZTL432AQFTA is available at Aetrix Electronics and suitable for automotive power management, isolated DC-DC converter feedback, and overvoltage protection circuits requiring stable component supply with full AEC-Q100 documentation and traceable sourcing.
Supply support for ZTL432AQFTA 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets with ISO/TS 16949 and IATF16949 certification.
ZTL432AQFTA belongs to Diodes' automotive-compliant precision shunt regulator product line, designed specifically for AEC-Q100 Grade 1 power supply feedback, voltage monitoring, and reference applications in harsh-temperature environments.
FAQ
What is the maximum cathode-to-anode voltage for ZTL432AQFTA?
The absolute maximum cathode voltage (VKA) is 20 V relative to the anode. Operation beyond this risks permanent damage. Recommended operating range is VREF to 20 V, with stable regulation verified up to 20 V at 100 mA sink current per datasheet Section 5.
Can ZTL432AQFTA replace TL432 in existing designs?
ZTL432AQFTA matches TL432's electrical specs and SOT23 pinout but adds AEC-Q100 qualification and extended temperature support. It is a direct replacement in automotive designs requiring qualification; commercial TL432 designs may require validation of thermal derating and ESD robustness per DS36916 Rev. 5-2.
How does the ZTL432AQFTA achieve stability with capacitive loads?
ZTL432AQFTA remains stable with ≥4.7 nF capacitance between anode and cathode, as confirmed in Figure 4 of DS36916. This allows direct integration with optocoupler input capacitance or small ceramic bypass caps without external compensation networks.
What is the minimum cathode current needed for regulation?
The minimum cathode current (IKA(MIN)) is 0.4 mA at VKA = VREF, ensuring reliable turn-on even under ultra-light loads such as microcontroller reset supervision or low-power sensor biasing circuits.
ZTL432AQFTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 20 V
- Current - Output:
- 100 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 121ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZTL432AQFTA FAQ
1.How can I place an order for ZTL432AQFTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZTL432AQFTA 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 ZTL432AQFTA reliable?
The price and inventory of ZTL432AQFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTL432AQFTA is usually 5 days.
3.What payment methods are accepted for ZTL432AQFTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTL432AQFTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZTL432AQFTA?
ZTL432AQFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZTL432AQFTA 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 ZTL432AQFTA?
For technical support, including ZTL432AQFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTL432AQFTA requirements.
6.How does Aetrix verify that ZTL432AQFTA is sourced from the original manufacturer or authorized distributors?
All ZTL432AQFTA 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 ZTL432AQFTA meets industry standards.
7.What is the process for return or replacement of ZTL432AQFTA?
All ZTL432AQFTA units undergo pre-shipment inspection (PSI). If there is an issue with ZTL432AQFTA, 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 ZTL432AQFTA part is unused and in its original packaging.
Return procedure for ZTL432AQFTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZTL432AQFTA Tags
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