Overview
The TL431BMFDT is an adjustable precision shunt regulator produced by Nexperia USA Inc. This three-terminal device is part of the TL431 family, known for its high precision and versatility. The TL431BMFDT allows for a programmable output voltage range between 2.495 V and 36 V, set by two external resistors. It is designed to offer high thermal stability and low output noise, making it suitable for a wide range of applications across various industries.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Reference Voltage (Vref) | - | - | 2.495 | - | V |
| Output Voltage Range | - | 2.495 | - | 36 | V |
| Reference Voltage Tolerance | - | - | - | 0.5 % | % |
| Cathode-Anode Voltage (VKA) | - | - | - | 37 | V |
| Cathode Current (IK) | - | 1 | - | 100 | mA |
| Reference Current (Iref) | - | 0.05 | - | 10 | mA |
| Total Power Dissipation (Ptot) | Tamb ≤ 25 °C | - | - | 950 | mW |
| Junction Temperature (Tj) | - | - | - | 150 | °C |
| Ambient Temperature (Tamb) | - | -40 | - | 125 | °C |
| Storage Temperature (Tstg) | - | -65 | - | 150 | °C |
| Pinning Configuration | - | - | - | Mirrored | - |
| Package | - | - | - | SOT23 | - |
Key Features
- Programmable Output Voltage: Up to 36 V, set by two external resistors.
- Reference Voltage Tolerances: Available in three grades: Standard (2%), A-Grade (1%), and B-Grade (0.5%).
- Low Output Noise: Ensures stable and quiet operation.
- Typical Temperature Drift: 9 mV over the range of 0 °C to 70 °C.
- Output Impedance: Typically 0.2 Ω.
- Sink Current Capability: From 1 mA to 100 mA.
- AEC-Q100 Qualified: Grade 1, suitable for automotive applications.
Applications
- Shunt Regulator: Used for voltage regulation in various circuits.
- Precision Current Limiter: Limits current to a precise value.
- Precision Constant Current Sink: Provides a stable current sink.
- Isolated Feedback Loop for SMPS (Switch Mode Power Supply): Enhances the stability and efficiency of SMPS designs.
Q & A
- What is the output voltage range of the TL431BMFDT?
The output voltage range is between 2.495 V and 36 V, set by two external resistors.
- What are the reference voltage tolerances available for the TL431BMFDT?
The device is available in three reference voltage tolerances: Standard (2%), A-Grade (1%), and B-Grade (0.5%).
- What is the typical temperature drift of the TL431BMFDT?
The typical temperature drift is 9 mV over the range of 0 °C to 70 °C.
- What is the output impedance of the TL431BMFDT?
The typical output impedance is 0.2 Ω.
- What is the sink current capability of the TL431BMFDT?
The sink current capability ranges from 1 mA to 100 mA.
- Is the TL431BMFDT AEC-Q100 qualified?
Yes, it is AEC-Q100 qualified, Grade 1, making it suitable for automotive applications.
- What is the ambient temperature range for the TL431BMFDT?
The ambient temperature range is from -40 °C to 125 °C.
- What package types are available for the TL431BMFDT?
The device is available in the SOT23 package.
- What are some common applications of the TL431BMFDT?
Common applications include shunt regulators, precision current limiters, precision constant current sinks, and isolated feedback loops for SMPS.
- Is the TL431BMFDT RoHS compliant?
Yes, the TL431BMFDT is RoHS compliant.
