LM431BIM3X/NOPB
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | TO-236-3, SC-59, SOT-23-3 |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Current - Supply | - |
| Output Type | Adjustable |
| Voltage - Input | - |
| Tolerance | ±1% |
| Temperature Coefficient | 50ppm/°C Typical |
| Current - Output | 100 mA |
| Supplier Device Package | SOT-23-3 |
| Reference Type | Shunt |
| Current - Cathode | 1 mA |
| Voltage - Output (Min/Fixed) | 2.495V |
| Noise - 0.1Hz to 10Hz | - |
| Noise - 10Hz to 10kHz | - |
| Voltage - Output (Max) | 37 V |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | LM431 |
| REACH Status | REACH Unaffected |
| Standard Package | 3,000 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
LM431BIM3X/NOPB Shunt Voltage Reference IC Adjustable 2.495V 37 VV ±1% 100 mA
The LM431BIM3X/NOPB is a 2.5V adjustable precision shunt voltage reference from Texas Instruments, supplied in small SOT-23 surface mount tape-and-reel packaging. This widely used programmable reference features a tight initial tolerance and low temperature drift, acting like a zener diode with adjustable output voltage from 2.5V up to 36V by configuring external resistor dividers. It supports stable operation over a broad current range, making it ideal for closed-loop feedback circuits in power supplies and analog measurement systems, delivering consistent reference voltage for voltage regulation and error amplification tasks.
Key features
● Fixed 2.5V internal bandgap reference
● Adjustable output voltage ranging from 2.5V to 36V
● ±0.5% initial voltage accuracy; low temperature coefficient
● Wide operating cathode current range from 100µA to 100mA
● Low dynamic output impedance; simple two-resistor setup for voltage scaling
● Stable performance with minimal external compensation components
FAQ
Q: What is the minimum cathode current for normal operation?
A: At least 100µA cathode current is required to maintain regulation.
Q: Can LM431BIM3X/NOPB output voltage exceed 36V?
A: No, the maximum rated output voltage is limited to 36V.
Q: Does the device need compensation capacitor?
A: A small capacitor may be added to prevent oscillation in high-gain feedback loops.
Alternative voltage reference parts
1. TL431AIDBZT: TI shunt reference with 2.5V bandgap, ±0.4% accuracy and SOT-23 package as a direct cross-replacement for general power supply feedback.
2. TLV431AIDBVR: Low-voltage shunt reference with 1.24V internal reference, suitable for low-battery systems where 2.5V reference is unavailable.
3. KA431B: ON Semiconductor programmable shunt regulator with 2.5V reference and comparable accuracy for alternate sourcing in mass production.
4. TS431AILT: STMicroelectronics adjustable shunt reference matching LM431 topology, offering equivalent electrical characteristics for supply chain redundancy.
