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Texas Instruments LMV431ACM5X/NOPB
- Part No.:
- LMV431ACM5X/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV431ACM5X/NOPB.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,482
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Product details
Overview
LMV431ACM5X/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 monitoring in low-voltage systems. It delivers 0.5% initial tolerance (at 25°C), 39 ppm/°C temperature coefficient, 55 µA minimum cathode current for regulation, and 0.25 Ω dynamic output impedance - enabling stable operation in 3-V off-line switching regulators and low-dropout series regulators.
For engineers reviewing the LMV431ACM5X/NOPB datasheet, LMV431ACM5X/NOPB pinout, LMV431ACM5X/NOPB application, or LMV431ACM5X/NOPB equivalent, key selection criteria include its 1.24 V reference accuracy across 0°C to 70°C, compatibility with capacitive loads from 1 pF to 10 kΩ, and functional equivalence to Zener diodes below 2.7 V while offering superior thermal stability and lower operating current.
Technical Context
The LMV431ACM5X/NOPB implements a band-gap reference core with negative feedback from cathode to adjust pin, functioning like a non-inverting op-amp configuration. Its internal architecture enables programmable output voltage from 1.24 V to 30 V via external resistor divider, with guaranteed regulation down to 55 µA cathode current.
It operates within 0°C to 70°C commercial temperature range and supports stable performance with capacitive loads ≥1 pF and ≤10 kΩ. The device exhibits fast turn-on response and low 0.25 Ω dynamic output impedance, making it suitable for closed-loop feedback in switching power supplies and precision voltage monitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.24 V ±1.2 mV at 25°C; sets precise feedback threshold for shunt or series regulation |
| Initial Tolerance | ±0.5% at 25°C; ensures tight output voltage setting without calibration |
| Temp Coefficient | 39 ppm/°C; limits drift to <±12 mV over full 0°C–70°C range |
| Min Cathode Current | 55 µA; enables regulation in ultra-low-power applications such as battery monitors |
| Dynamic Output Impedance | 0.25 Ω; maintains stable reference under load transients in feedback loops |
| Operating Temp Range | 0°C to 70°C; qualified for commercial-grade embedded and industrial control systems |
| Max Cathode Voltage | 30 V; supports wide-range output programming up to 30 V with external resistors |
Pinout & Package
SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, surface-mount, RoHS-compliant with Sn lead finish and Level-1 moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No internal connection | Must be left floating; no electrical function or routing required |
| Pin 2 (Anode) | Anode terminal | Connects to system ground or return path; forms current sink path with cathode |
| Pin 3 (Cathode) | Output terminal | Delivers regulated voltage; connects to feedback node or load in shunt configuration |
| Pin 4 (Adjust) | Reference input | Accepts divided output voltage; controls cathode voltage via resistor divider ratio |
| Pin 5 (Anode) | Redundant anode | Internally tied to Pin 2; may be used for improved thermal or layout symmetry |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | 1.24 V reference enables regulation in 1.8 V–3.3 V systems where standard Zeners fail |
| Temperature compensation | 39 ppm/°C TC ensures <±12 mV drift over 0°C–70°C, critical for stable feedback loops |
| Low operating current | 55 µA min cathode current allows use in micropower designs with >10-year battery life |
| Low output impedance | 0.25 Ω dynamic impedance minimizes voltage droop during load steps in error amplifier circuits |
| Capacitive load stability | Stable with 1 pF–10 kΩ capacitive loads, eliminating need for external compensation in most applications |
Applications
| Shunt Regulator | Series Regulator |
|---|---|
Use Scenario: Providing precise 2.5 V bias for analog sensors in a 3.3 V IoT node powered by coin cell. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant voltage across sensor supply rail using two external resistors. Use Value: Replaces discrete Zener + transistor combo with single IC, reducing BOM count and improving thermal stability. | Use Scenario: Enabling adjustable output in a low-noise LDO design where output must be set to 1.8 V from 3.3 V input. IC Role / Device Role / Timing Role: Error amplifier comparing feedback voltage against 1.24 V reference to drive pass transistor gate. Use Value: Achieves ±0.5% output accuracy over temperature without trimming, unlike op-amp-based solutions. |
| Voltage Monitor | Overvoltage Protection |
Use Scenario: Detecting brownout in a microcontroller supply rail operating at 2.8 V nominal. IC Role / Device Role / Timing Role: Threshold detector triggering reset signal when VCC drops below 2.75 V. Use Value: Uses same 1.24 V reference with resistor divider to achieve accurate, temperature-stable trip point. | Use Scenario: Protecting USB-C port from >5.5 V input surges in portable docking station. IC Role / Device Role / Timing Role: Crowbar circuit trigger controlling SCR gate via adjustable threshold. Use Value: Programmable trip point (e.g., 5.5 V) with <±12 mV temp drift ensures reliable clamping across ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | Same 1.24 V reference, ±0.5% tolerance, but rated for −40°C to 125°C; higher 80 µA min cathode current | Better suited for automotive under-hood use; less ideal for ultra-low-power battery apps due to higher IZ(MIN) | Select TLVH431ACDBVR when extended temperature range or AEC-Q200 compliance is required |
| AS431ARTDT-33 | 1.24 V reference, ±1% tolerance, 100 µA min cathode current, SOT-23-3 package (no NC pin) | Limited adjustability range (up to 24 V); lacks pin 1 NC and pin 5 redundancy; lower accuracy | Choose AS431ARTDT-33 only for cost-sensitive, non-critical applications where 1% tolerance is acceptable |
Compared with TLVH431ACDBVR and AS431ARTDT-33, the LMV431ACM5X/NOPB offers optimal balance of accuracy (±0.5%), ultra-low regulation current (55 µA), and commercial-temperature reliability - making it preferred for space-constrained, battery-powered industrial sensors and 3-V switching regulators requiring tight feedback control.
Availability
LMV431ACM5X/NOPB is available at Aetrix Electronics and suitable for 3-V off-line switching regulators, low-dropout series regulators, and voltage monitors requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for LMV431ACM5X/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, with over 90 years of innovation in precision analog ICs and power management.
The LMV431 family was developed to replace low-voltage Zener diodes in feedback networks, targeting cost-sensitive, space-constrained applications in consumer, industrial, and communications equipment requiring high accuracy and thermal stability.
FAQ
What is the reference voltage accuracy of LMV431ACM5X/NOPB over temperature?
The LMV431ACM5X/NOPB has a reference voltage of 1.24 V with ±0.5% initial tolerance at 25°C and a maximum deviation of ±12 mV over the full 0°C to 70°C operating range, corresponding to a temperature coefficient of 39 ppm/°C as specified in the LMV431AC Electrical Characteristics table.
Can LMV431ACM5X/NOPB operate with very small capacitive loads?
Yes, the LMV431ACM5X/NOPB is stable with capacitive loads as low as 1 pF and as high as 10 kΩ, per Figure 19 in the SNVS041G datasheet. This eliminates the need for external compensation in most shunt regulator configurations, including those driving ADC reference inputs or op-amp bias networks.
What is the minimum cathode current required for regulation in LMV431ACM5X/NOPB?
The LMV431ACM5X/NOPB requires a minimum cathode current of 55 µA to maintain regulation, as confirmed in Section 7.7 (LMV431AC Electrical Characteristics). This ultra-low IZ(MIN) enables use in micropower applications such as battery voltage monitors and energy-harvesting systems.
How does the pin configuration of LMV431ACM5X/NOPB differ from 3-pin variants?
The LMV431ACM5X/NOPB uses a 5-pin SOT-23-5 (DBV) package with Pin 1 unconnected and Pin 5 redundantly tied to Anode. Unlike 3-pin SOT-23 versions (e.g., LMV431AIMF/NOPB), this layout provides enhanced thermal dissipation and layout flexibility for high-precision PCB routing, while maintaining identical electrical functionality.
Is LMV431ACM5X/NOPB compatible with lead-free reflow processes?
Yes, LMV431ACM5X/NOPB features Sn (tin) lead finish and is rated for Level-1 moisture sensitivity with peak reflow temperature of 260°C, fully compliant with IPC/JEDEC J-STD-020 standard for lead-free soldering. Its SOT-23-5 package supports standard reflow profiles without special handling.
LMV431ACM5X/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:
- ±1%
- 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
LMV431ACM5X/NOPB FAQ
1.How can I place an order for LMV431ACM5X/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV431ACM5X/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 LMV431ACM5X/NOPB reliable?
The price and inventory of LMV431ACM5X/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV431ACM5X/NOPB is usually 5 days.
3.What payment methods are accepted for LMV431ACM5X/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV431ACM5X/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV431ACM5X/NOPB?
LMV431ACM5X/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV431ACM5X/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 LMV431ACM5X/NOPB?
For technical support, including LMV431ACM5X/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV431ACM5X/NOPB requirements.
6.How does Aetrix verify that LMV431ACM5X/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV431ACM5X/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 LMV431ACM5X/NOPB meets industry standards.
7.What is the process for return or replacement of LMV431ACM5X/NOPB?
All LMV431ACM5X/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV431ACM5X/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 LMV431ACM5X/NOPB part is unused and in its original packaging.
Return procedure for LMV431ACM5X/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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