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Texas Instruments LMV431BCM5X/NOPB
- Part No.:
- LMV431BCM5X/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV431BCM5X/NOPB.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:10,304
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Product details
Overview
LMV431BCM5X/NOPB from Texas Instruments is a precision 1.24-V adjustable shunt regulator in SOT-23-5 package, designed for voltage reference, error amplification, and overvoltage protection in low-voltage systems. It delivers 0.5% initial tolerance (LMV431B grade), 39 ppm/°C temperature coefficient, 55 µA minimum cathode current, and 0.25 Ω dynamic output impedance - enabling stable regulation down to 2.7 V in space-constrained power supplies.
For engineers reviewing the LMV431BCM5X/NOPB datasheet, LMV431BCM5X/NOPB pinout, LMV431BCM5X/NOPB application, or LMV431BCM5X/NOPB equivalent, key selection criteria include its industrial-grade temperature range (−40°C to +85°C), compatibility with capacitive loads from 1 pF to 10 kΩ, and functional equivalence to TLV431 across most feedback configurations.
Technical Context
The LMV431BCM5X/NOPB implements a band-gap reference core with internal op-amp-like feedback control between REF and CATHODE pins, allowing precise two-resistor programming of output voltage from 1.24 V to 30 V. Its architecture supports both shunt and series regulator topologies without external compensation.
It operates with cathode currents from 55 µA to 15 mA, maintains regulation under capacitive loads ≥1 pF, and exhibits fast turn-on response suitable for dynamic voltage monitoring and crowbar circuits. The device is specified for industrial temperature range and rated for 35 V maximum cathode voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.24 V ±0.5% at 25°C; sets base accuracy for programmable output voltage |
| Temperature Coefficient | 39 ppm/°C; ensures ≤12 mV drift over −40°C to +85°C for stable reference performance |
| Dynamic Output Impedance | 0.25 Ω; enables tight regulation under load transients in feedback loops |
| Minimum Cathode Current | 55 µA; defines lowest operating current for reliable regulation onset |
| Cathode Voltage Range | 1.24 V to 30 V; supports wide output adjustment using external resistor divider |
| Operating Temperature | −40°C to +85°C; qualified for industrial environments without derating |
| Package | SOT-23-5 (DBV); 2.90 mm × 1.60 mm footprint compatible with high-density PCB layouts |
Pinout & Package
SOT-23-5 (DBV) package with 2.90 mm × 1.60 mm body size, 1.0 mm max height, and lead-free (Pb-free) Sn finish. RoHS-compliant, moisture sensitivity level (MSL) 1, peak reflow 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No Connect | Internally unconnected; must be left floating or tied to ground per layout best practice |
| Pin 2 (CATHODE) | Output Terminal | Regulated output node; sinks current to maintain programmed voltage at REF pin |
| Pin 3 (ANODE) | Return Path | Current return path to system ground; connects to cathode-side resistor in shunt configuration |
| Pin 4 (REF) | Feedback Input | High-impedance reference input; connected to voltage divider midpoint for output programming |
| Pin 5 (ANODE) | Redundant Return | Internally bonded to Pin 3; improves thermal and current-handling capability in SOT-23-5 variant |
Key Features
| Feature | Design Value |
|---|---|
| 0.5% Initial Tolerance (LMV431B) | Enables accurate voltage setting without post-manufacture trimming in production systems |
| Low 55 µA Operating Current | Supports ultra-low-power applications such as battery-backed monitors and energy-harvesting circuits |
| 0.25 Ω Dynamic Output Impedance | Minimizes output voltage deviation during load steps in closed-loop regulators |
| Stable with Capacitive Loads (1 pF–10 kΩ) | Eliminates need for external compensation in most feedback networks |
| Industrial Temperature Range (−40°C to +85°C) | Validated operation across full industrial ambient without derating or thermal margin loss |
Applications
| Overvoltage Protection | 3-V Off-Line Switching Regulator |
|---|---|
Use Scenario: Monitors DC bus voltage in AC/DC adapters and triggers shutdown when exceeding safe threshold. IC Role / Device Role / Timing Role: Precision voltage comparator with built-in reference; replaces discrete Zener + transistor circuit. Use Value: Enables fast, repeatable trip point at 3.3 V or 5 V using only two resistors - no calibration required. | Use Scenario: Provides error amplification in primary-side feedback loop of isolated flyback converters. IC Role / Device Role / Timing Role: Shunt-based error amplifier referenced to 1.24 V; drives optocoupler LED current proportional to output deviation. Use Value: Achieves ±1% output regulation without secondary-side sensing, reducing BOM count and isolation complexity. |
| Voltage Monitor | Low Dropout N-Channel Series Regulator |
Use Scenario: Detects brownout conditions in microcontroller supply rails to initiate controlled reset or sleep mode. IC Role / Device Role / Timing Role: Adjustable threshold detector with hysteresis-capable configuration via external RC network. Use Value: Delivers clean, noise-immune logic-level output at precisely defined voltage thresholds (e.g., 2.7 V ±2%) with <1 µs response. | Use Scenario: Forms pass-element control stage in linear regulators powering FPGA I/O banks or analog sensors. IC Role / Device Role / Timing Role: Reference-controlled gate driver for external N-channel MOSFET in series topology. Use Value: Supports dropout voltages as low as 200 mV while maintaining regulation stability across 100 µA–100 mA load range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV431ACDBVR | Same 1.24 V reference, 1% initial tolerance, SOT-23-5 package, but rated for 0°C to 70°C only | Limited to commercial-temperature applications; lower cost where industrial range not required | Select TLV431ACDBVR for cost-sensitive consumer designs operating within 0°C–70°C ambient |
| LM4040CIM3-ADJ/NOPB | Fixed 1.225 V reference (not adjustable), 0.5% tolerance, SOT-23-3, higher quiescent current (60 µA) | Only usable as fixed reference; lacks programmability and dual-anode thermal advantage | Choose LM4040CIM3-ADJ/NOPB only if fixed-voltage reference suffices and board space permits SOT-23-3 footprint |
Compared with TLV431ACDBVR and LM4040CIM3-ADJ/NOPB, the LMV431BCM5X/NOPB uniquely combines 0.5% tolerance, industrial temperature rating, adjustable output, and dual-anode SOT-23-5 thermal performance - making it optimal for ruggedized power management in embedded industrial systems.
Availability
LMV431BCM5X/NOPB is available at Aetrix Electronics and suitable for overvoltage protection, 3-V off-line switching regulators, and low-dropout series regulators requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV431BCM5X/NOPB 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
Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LMV431 family was engineered specifically for precision, low-voltage shunt regulation in space-constrained power systems - targeting applications where Zener diodes lack accuracy and standard voltage references lack adjustability.
FAQ
What is the maximum cathode voltage rating for LMV431BCM5X/NOPB?
The LMV431BCM5X/NOPB has an absolute maximum cathode voltage rating of 35 V. In normal operation, it is specified for cathode voltages up to 30 V. Exceeding 35 V risks permanent damage. This rating applies regardless of current level and must be respected in crowbar or overvoltage clamp designs using the LMV431BCM5X/NOPB.
Can LMV431BCM5X/NOPB replace TLV431 in existing designs?
Yes, the LMV431BCM5X/NOPB is functionally and pin-compatible with TLV431 in SOT-23-5 packages. Both share identical pinout, reference voltage, and basic electrical behavior. However, the LMV431BCM5X/NOPB adds industrial temperature range (−40°C to +85°C) and tighter 0.5% initial tolerance versus TLV431's 1%, making it a direct upgrade where enhanced accuracy or extended thermal operation is needed.
What is the minimum load current required for regulation in LMV431BCM5X/NOPB?
The LMV431BCM5X/NOPB requires a minimum cathode current of 55 µA to maintain regulation, as specified in its electrical characteristics table. Below this threshold, the device may exit regulation and exhibit unstable or undefined output voltage. This value is critical when designing high-impedance feedback dividers or low-power monitoring circuits using the LMV431BCM5X/NOPB.
Does LMV431BCM5X/NOPB require external compensation for stability?
No, the LMV431BCM5X/NOPB is internally compensated and stable with capacitive loads ranging from 1 pF to 10 kΩ, as confirmed in Figure 19 of the datasheet. Unlike many op-amp-based references, it does not require external phase compensation components - simplifying design and improving reliability in shunt regulator and error amplifier applications using the LMV431BCM5X/NOPB.
How does the dual-anode configuration in LMV431BCM5X/NOPB improve thermal performance?
The LMV431BCM5X/NOPB uses Pins 3 and 5 both as ANODE connections in its SOT-23-5 (DBV) package, effectively doubling the copper area for heat conduction from die to PCB. This reduces thermal resistance and allows higher continuous power dissipation compared to 3-pin variants - critical for sustained operation in compact, thermally constrained power supplies using the LMV431BCM5X/NOPB.
LMV431BCM5X/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.24V
- Voltage - Output (Max):
- 30 V
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMV431BCM5X/NOPB FAQ
1.How can I place an order for LMV431BCM5X/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV431BCM5X/NOPB 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 LMV431BCM5X/NOPB reliable?
The price and inventory of LMV431BCM5X/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV431BCM5X/NOPB is usually 5 days.
3.What payment methods are accepted for LMV431BCM5X/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV431BCM5X/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV431BCM5X/NOPB?
LMV431BCM5X/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV431BCM5X/NOPB 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 LMV431BCM5X/NOPB?
For technical support, including LMV431BCM5X/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV431BCM5X/NOPB requirements.
6.How does Aetrix verify that LMV431BCM5X/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV431BCM5X/NOPB 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 LMV431BCM5X/NOPB meets industry standards.
7.What is the process for return or replacement of LMV431BCM5X/NOPB?
All LMV431BCM5X/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV431BCM5X/NOPB, 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 LMV431BCM5X/NOPB part is unused and in its original packaging.
Return procedure for LMV431BCM5X/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV431BCM5X/NOPB Tags
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TL431AIDBZR
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TL431BQDBZR
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