Overview
The LM431SCCM3X is a programmable shunt regulator produced by onsemi. It is part of the LM431 series, which includes the LM431SA, LM431SB, and LM431SC models. This device is known for its thermal stability over a wide operating temperature range and its ability to be programmed to output voltages between approximately 2.5 V and 36 V using two external resistors. The LM431SCCM3X is particularly useful for applications requiring precise voltage regulation and low dynamic output impedance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage Tolerance | 0.5% | - |
| Operating Temperature Range | −25 to +85°C | - |
| Cathode Voltage (VKA) | 37 V | V |
| Cathode Current Range | −100 to +150 mA | mA |
| Reference Input Voltage (VREF) | 2.450 to 2.550 V | V |
| Minimum Cathode Current for Regulation (IKA(MIN)) | 0.45 to 1.00 mA | mA |
| Dynamic Output Impedance (ZKA) | 0.15 to 0.50 Ω | Ω |
| Thermal Resistance Junction-Air (RθJA) | 400 °C/W | °C/W |
| Power Dissipation (PD) | 310 mW | mW |
| Junction Temperature (TJ) | 150 °C | °C |
| Storage Temperature Range (TSTG) | −65 to +150 °C | - |
| Package Type | SOT-23 | - |
Key Features
- Programmable Output Voltage to 36 V
- Low Dynamic Output Impedance: 0.2 Ω (Typical)
- Sink Current Capability: 1.0 to 100 mA
- Equivalent Full-Range Temperature Coefficient of 50 ppm/°C (Typical)
- Temperature Compensated for Operation Over Full Rated Operating Temperature Range
- Low Output Noise Voltage
- Fast Turn-on Response
- Pb-Free, Halogen Free/BFR Free and RoHS Compliant
Applications
- Shunt Regulators
- Output Control for Three-Terminal Fixed Regulators
- High Current Shunt Regulators
- Current Limit or Current Source
- Constant-Current Sink
- Replacement for Zener Diodes in many applications
Q & A
- What is the output voltage range of the LM431SCCM3X? The output voltage can be set to any value between approximately 2.5 V and 36 V using two external resistors.
- What is the typical dynamic output impedance of the LM431SCCM3X? The typical dynamic output impedance is 0.2 Ω.
- What is the sink current capability of the LM431SCCM3X? The sink current capability ranges from 1.0 to 100 mA.
- What is the operating temperature range of the LM431SCCM3X? The operating temperature range is −25 to +85°C.
- Is the LM431SCCM3X RoHS compliant? Yes, the LM431SCCM3X is Pb-Free, Halogen Free/BFR Free and RoHS compliant.
- What package types are available for the LM431SCCM3X? The LM431SCCM3X is available in the SOT-23 package type.
- What is the junction temperature limit for the LM431SCCM3X? The junction temperature limit is 150 °C.
- How is the output voltage of the LM431SCCM3X programmed? The output voltage is programmed using two external resistors.
- What are some common applications of the LM431SCCM3X? Common applications include shunt regulators, output control for three-terminal fixed regulators, high current shunt regulators, current limit or current source, and constant-current sink.
- What is the storage temperature range for the LM431SCCM3X? The storage temperature range is −65 to +150 °C.
