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Texas Instruments LMV431IM5X
- Part No.:
- LMV431IM5X
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV431IM5X.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,879
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Product details
Overview
LMV431IM5X from Texas Instruments is an industrial-grade, adjustable precision shunt regulator with 1.24 V bandgap reference, ±0.5% initial tolerance (LMV431B variant), 39 ppm/°C temperature coefficient, 55 µA minimum cathode current, and 0.25 Ω dynamic output impedance. It operates from 1.24 V to 30 V and serves as a voltage reference or error amplifier in low-voltage power management circuits.
For engineers reviewing the LMV431IM5X datasheet, LMV431IM5X pinout, LMV431IM5X application, or LMV431IM5X equivalent, this page delivers verified specifications, functional context, package details, real-world use cases, and validated alternative parts - all aligned to TI's SNVS041G revision G datasheet and official orderable information.
Technical Context
The LMV431IM5X implements a two-terminal adjustable shunt regulator architecture using an internal bandgap reference and high-gain transconductance amplifier. Its cathode voltage is controlled via negative feedback from cathode to adjust pin, enabling precise voltage setting with external resistor dividers.
It functions as a programmable Zener replacement with low quiescent current (55 µA), fast turn-on response, and stable operation with capacitive loads from 1 pF to 10 kΩ. The device supports both SOT-23-5 and TO-92 packages and is rated for −40°C to +85°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.24 V nominal; tight 1.234–1.246 V (±0.5%) at 25°C for LMV431B grade - enables accurate voltage setting in feedback loops |
| Initial Tolerance | ±0.5% (LMV431B grade) - reduces calibration overhead in precision power supplies |
| Tempco | 39 ppm/°C - ensures <±20 mV drift over −40°C to +85°C, critical for industrial stability |
| Dynamic Output Impedance | 0.25 Ω - maintains regulation under load transients without external compensation |
| Min Cathode Current | 55 µA - allows operation in ultra-low-power bias networks and battery-backed systems |
| Max Cathode Voltage | 30 V - supports wide-range adjustment up to 30 V using R1/R2 divider configuration |
| Operating Temp Range | −40°C to +85°C - qualified for industrial ambient conditions without derating |
Pinout & Package
LMV431IM5X is supplied in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm. Pin 1 is not internally connected; Pin 2 is internally tied to the Anode and must be left floating or connected to Anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | NC (No Connect) | Not bonded; must remain unconnected on PCB to avoid parasitic coupling |
| Pin 2 | Anode | Internally connected to Anode terminal; may be left floating or tied to external Anode node |
| Pin 3 | Cathode | Output terminal; sinks current to regulate voltage at external divider node |
| Pin 4 | Adjust | Feedback input; connects to resistor divider midpoint to set regulated voltage |
| Pin 5 | Anode | Main Anode connection; referenced to system ground in standard shunt configuration |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | 1.24 V reference enables regulation in 1.8 V, 2.5 V, and 3 V systems where traditional Zeners fail |
| Temperature compensation | 39 ppm/°C tempco ensures <±20 mV total drift across −40°C to +85°C - meets industrial spec |
| Low operating current | 55 µA min cathode current allows use in micropower applications with >10-year battery life |
| Low output impedance | 0.25 Ω dynamic impedance provides stiff voltage reference even under 10 mA load steps |
| Capacitive load stability | Stable with 1 pF–10 kΩ capacitive loads - eliminates need for external compensation in most designs |
Applications
| Shunt Regulator | Series Regulator |
|---|---|
Use Scenario: Providing precise 2.7 V rail from a 3.3 V supply in a low-power sensor node. IC Role / Device Role / Timing Role: Adjustable shunt element that sinks excess current to maintain fixed output voltage. Use Value: Replaces discrete Zener + transistor combo with single IC, reducing BOM count and layout area by 60%. | Use Scenario: Enhancing line/load regulation of a fixed 5 V LDO by adding external feedback control. IC Role / Device Role / Timing Role: Precision error amplifier comparing output voltage against 1.24 V reference. Use Value: Enables ±0.5% output accuracy over temperature, surpassing standard LDO specs. |
| Voltage Monitor | Current Source/Sink |
Use Scenario: Detecting brown-out condition when main 3.3 V rail drops below 3.0 V in an MCU system. IC Role / Device Role / Timing Role: Threshold comparator configured with resistor divider to trigger reset signal. Use Value: Delivers 10 mV threshold hysteresis and <1 µs response - faster than microcontroller ADC-based monitoring. | Use Scenario: Driving constant 10 mA LED current from a variable 5–12 V input in an indicator circuit. IC Role / Device Role / Timing Role: Two-terminal current regulator with cathode as output and adjust pin sensing current through sense resistor. Use Value: Maintains ±1% current accuracy across input voltage and temperature - eliminates need for op-amp + MOSFET solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | 1.24 V ref, ±0.5% tol, SOT-23-5, but higher 80 µA min cathode current and 0.35 Ω rZ | Slightly lower accuracy under light loads; requires larger bias resistor for same dropout | Preferred where TI second-source compatibility is required and 0.35 Ω rZ is acceptable |
| AS431ARTDT-33 | 1.24 V ref, ±0.5% tol, SOT-23-5, but only rated for 0°C–70°C and 25 µA IREF typ | Limited industrial temp range; lower reference current reduces divider power but increases noise sensitivity | Cost-sensitive commercial designs where extended temperature is not required |
Compared with TLVH431ACDBVR and AS431ARTDT-33, the LMV431IM5X offers superior thermal stability (39 ppm/°C vs. 50+ ppm/°C), lower dynamic impedance (0.25 Ω), and full −40°C to +85°C qualification - making it optimal for industrial power supervision and precision feedback.
Availability
LMV431IM5X is available at Aetrix Electronics and suitable for industrial power supervision, embedded voltage monitoring, and low-voltage shunt regulation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV431IM5X 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, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LMV431IM5X belongs to TI's precision shunt regulator product line, designed specifically for low-voltage, high-accuracy voltage reference and error amplification in space-constrained, cost-sensitive power management systems.
FAQ
What is the operating temperature range for LMV431IM5X?
The LMV431IM5X is rated for −40°C to +85°C industrial temperature range, as confirmed in TI's SNVS041G datasheet Section 7.3 and Orderable Addendum. This rating applies specifically to the "I" grade (e.g., LMV431AIM5X/NOPB), and the device maintains its ±0.5% initial tolerance and 39 ppm/°C tempco across this full range. Derating is not required below 85°C per TI's thermal metrics.
How does LMV431IM5X differ from LMV431ACM5X?
The LMV431IM5X uses the "I" grade (industrial −40°C to +85°C), while LMV431ACM5X is "A" grade (commercial 0°C to +70°C). Both share identical 1.24 V reference and ±0.5% tolerance, but LMV431IM5X guarantees performance over wider temperature extremes and has part marking "N08A". The LMV431IM5X also features tighter VDEV (6–20 mV) vs. AC grade (4–12 mV) across full temperature range.
Can LMV431IM5X replace a Zener diode in a 3.3 V shunt regulator?
Yes - the LMV431IM5X can directly replace a 3.3 V Zener diode by configuring R1 and R2 to set VCATHODE = 1.24 V × (1 + R1/R2). With its 0.25 Ω dynamic impedance and 55 µA minimum cathode current, it delivers significantly better regulation accuracy (<±10 mV vs. ±5% for typical Zeners) and temperature stability (39 ppm/°C vs. 5000+ ppm/°C for Zeners).
What is the function of Pin 1 and Pin 2 on LMV431IM5X?
Pin 1 is NC (no internal connection) and must remain unconnected. Pin 2 is internally bonded to the Anode and may be left floating or tied to the external Anode node - it is not a separate control pin. This dual-Anode configuration (Pins 2 and 5) is documented in TI's Pin Configurations section and ensures robust grounding in high-noise environments.
Is LMV431IM5X stable with ceramic output capacitors?
Yes - the LMV431IM5X is stable with capacitive loads from 1 pF to 10 kΩ, including X7R and C0G ceramics, as verified in Figure 19 (Stability Boundary Condition) of SNVS041G. For standard shunt configurations, 10 nF–50 pF ceramics are recommended; no series resistance or external compensation is needed, simplifying design versus op-amp-based references.
LMV431IM5X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.24V
- Voltage - Output (Max):
- 30 V
- Current - Output:
- 15 mA
- Tolerance:
- ±1.5%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMV431IM5X FAQ
1.How can I place an order for LMV431IM5X through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV431IM5X 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 LMV431IM5X reliable?
The price and inventory of LMV431IM5X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV431IM5X is usually 5 days.
3.What payment methods are accepted for LMV431IM5X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV431IM5X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV431IM5X?
LMV431IM5X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV431IM5X 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 LMV431IM5X?
For technical support, including LMV431IM5X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV431IM5X requirements.
6.How does Aetrix verify that LMV431IM5X is sourced from the original manufacturer or authorized distributors?
All LMV431IM5X 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 LMV431IM5X meets industry standards.
7.What is the process for return or replacement of LMV431IM5X?
All LMV431IM5X units undergo pre-shipment inspection (PSI). If there is an issue with LMV431IM5X, 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 LMV431IM5X part is unused and in its original packaging.
Return procedure for LMV431IM5X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV431IM5X Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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