Model No: TL431AMFDT
Nexperia USA Inc. TL431AMFDT
Manufacturer: Nexperia USA Inc.
SEMICON NO.: TL431AMFDT
Package: SOT-23
Stock: In stock
Description: TL431 Shunt Regulator Adjustable 36V
SEMICON NO.: TL431AMFDT
Package: SOT-23
Stock: In stock
Description: TL431 Shunt Regulator Adjustable 36V
Quantity :
| Mfr | Nexperia USA Inc. |
| Device Type | Adjustable Precision Shunt Regulator (Three-Terminal) |
| Reference Voltage | 2.495 V (Nominal) |
| Output Voltage Range | 2.495 V to 36 V |
| Reference Voltage Tolerance | ±1% (A-Grade) |
| Sink Current Capability | 1 mA to 100 mA |
| Typical Temperature Drift | 9 mV |
| Dynamic Output Impedance (Typical) | 0.2 Ω |
| Output Noise | Low |
| Operating Temperature | –40°C to +125°C |
| Package | SOT-23 |
| Mounting Type | Surface Mount |
| Compliance | RoHS Compliant |
The TL431AMFDT is a 1% tolerance A-grade adjustable precision three-terminal shunt regulator from Nexperia (formerly NXP), supplied in a 3-lead SOT23 (TO-236AB) package with mirrored pinning and tape-and-reel packaging. Built on the proven TL431 family, it references 2.495 V at 25°C and allows the output voltage to be programmed anywhere between Vref and 36 V using two external resistors, delivering a typical output impedance of 0.2 Ω, sink current capability from 1 mA to 100 mA, enhanced loop stability and improved EMI ruggedness optimized for switching power supplies, and AEC-Q100 grade 1 qualification across -40°C to +125°C for both industrial and automotive voltage-reference and feedback applications.
● A-grade 1% initial reference accuracy (2.470 V to 2.520 V at 25°C) provides tighter set-point tolerance than standard 2% grade designs.
● Mirrored SOT23 pinout (pin 1 REF, pin 2 cathode, pin 3 anode) lets PCB layouts reuse compact footprints in mirrored assembly positions.
● FDT variant offers an expanded stability region and higher EMI immunity, specifically hardened for noisy SMPS control loops.
● Adjustable output from 2.495 V to 36 V with only two external divider resistors replaces discrete zener diodes in countless regulation circuits.
● Typical 0.2 Ω dynamic impedance and sharp turn-on characteristic give precise regulation and fast response in closed-loop feedback.
● AEC-Q100 grade 1 rating, low reference current of 2 µA to 4 µA and microamp-scale off-state current support reliable automotive and low-power designs.
● Mirrored SOT23 pinout (pin 1 REF, pin 2 cathode, pin 3 anode) lets PCB layouts reuse compact footprints in mirrored assembly positions.
● FDT variant offers an expanded stability region and higher EMI immunity, specifically hardened for noisy SMPS control loops.
● Adjustable output from 2.495 V to 36 V with only two external divider resistors replaces discrete zener diodes in countless regulation circuits.
● Typical 0.2 Ω dynamic impedance and sharp turn-on characteristic give precise regulation and fast response in closed-loop feedback.
● AEC-Q100 grade 1 rating, low reference current of 2 µA to 4 µA and microamp-scale off-state current support reliable automotive and low-power designs.
This shunt regulator covers a wide range of precision reference and protection roles: isolated optocoupler feedback loops for flyback, buck and boost SMPS in adapters and open-frame power supplies; programmable voltage references and overvoltage or undervoltage detection thresholds; constant-current sinks and precision current limiters for LEDs and sensor bias; on-board 5 V or 3.3 V rail regulation replacing discrete zener clamps; battery charger termination and voltage monitoring; and industrial adapters, consumer chargers, automotive modules and linear regulator post-regulation.
Alternative precision referenc models
● TL431AFDT: Same A-grade 1% SOT23 FDT device with normal pinning for boards routed to the conventional cathode/reference/anode order.
● TL431BMFDT: 0.5% B-grade mirrored-pinning version for higher-precision reference designs demanding tighter Vref tolerance.
● TL431AIDBZR: TI cross-brand A-grade normal-pinning SOT23 shunt regulator with comparable 1% accuracy for generic replacement.
● TLV431AIDBZR: Low-voltage 1.24 V reference variant for sub-2 V rails and ultra-low-current portable regulation circuits.
● TL431AFDT: Same A-grade 1% SOT23 FDT device with normal pinning for boards routed to the conventional cathode/reference/anode order.
● TL431BMFDT: 0.5% B-grade mirrored-pinning version for higher-precision reference designs demanding tighter Vref tolerance.
● TL431AIDBZR: TI cross-brand A-grade normal-pinning SOT23 shunt regulator with comparable 1% accuracy for generic replacement.
● TLV431AIDBZR: Low-voltage 1.24 V reference variant for sub-2 V rails and ultra-low-current portable regulation circuits.
Nexperia TL431 family core parameters: A-grade 1% tolerance, 2.495 V reference, adjustable to 36 V, 1-100 mA sink current, 0.2 Ω typical impedance, mirrored SOT23 MFDT pinout, FDT EMI-hardened stability variant, AEC-Q100 grade 1, -40 to +125°C.
