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Texas Instruments LMV431AIM5X
- Part No.:
- LMV431AIM5X
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV431AIM5X.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,219
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Product details
Overview
LMV431AIM5X from Texas Instruments is an industrial-grade, adjustable precision shunt regulator with 1.24 V reference voltage, 0.5% initial tolerance (LMV431B-grade), 39 ppm/°C temperature coefficient, and low 55 µA operating current. It functions as a programmable 1.24–30 V shunt reference in feedback loops of DC-DC converters, voltage monitors, and current sources.
For engineers reviewing the LMV431AIM5X datasheet, LMV431AIM5X pinout, LMV431AIM5X application, or LMV431AIM5X equivalent, this page delivers verified electrical specs, SOT-23-5 package details, functional block context, real-world implementation examples, and two validated alternative parts for design flexibility and supply continuity.
Technical Context
The LMV431AIM5X implements a band-gap-based 1.24 V reference core with negative feedback via the adjust pin, enabling precise cathode voltage control like a non-inverting op-amp configuration. Its internal architecture supports stable operation with capacitive loads from 10 nF to 50 pF and delivers fast turn-on response for dynamic regulation.
It operates across −40°C to +85°C with 0.25 Ω dynamic output impedance and maintains regulation down to 55 µA cathode current. The device is rated for 35 V maximum cathode voltage and ±30 mA continuous cathode current, supporting both shunt and series regulator topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.24 V nominal at 25°C; tight 1.228–1.252 V range over full temperature (−40°C to +85°C) enables accurate setpoint programming. |
| Initial Tolerance | ±0.5% (LMV431B-grade); ensures minimal calibration overhead in precision feedback paths. |
| Tempco | 39 ppm/°C; guarantees <±6 mV deviation over industrial temperature range, critical for stable voltage monitoring. |
| Operating Current | 55 µA minimum cathode current for regulation; allows ultra-low-power operation in battery-backed or energy-harvesting systems. |
| Dynamic Output Impedance | 0.25 Ω typical; provides high loop gain and low AC error in closed-loop regulator designs. |
| Cathode Voltage Range | 1.24 V to 30 V programmable; supports wide-output DC-DC converters without external scaling resistors. |
| Max Cathode Voltage | 35 V absolute maximum; permits safe operation in 24 V industrial bus and off-line auxiliary supplies. |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 5-pin surface-mount, RoHS-compliant, SN lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No internal connection | Must be left unconnected; no routing or grounding required. |
| Pin 2 (Anode) | Anode terminal | Connects to system ground or return path; forms reference current sink node. |
| Pin 3 (Cathode) | Cathode output | Delivers regulated voltage; connects to feedback divider or load; handles up to ±30 mA. |
| Pin 4 (Adjust) | Reference input | Accepts feedback from voltage divider; controls cathode voltage via negative feedback loop. |
| Pin 5 (Anode) | Second anode connection | Internally tied to Pin 2; may be left floating or connected to same ground node for improved thermal stability. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | 1.24 V reference enables regulation in 1.8 V, 2.5 V, and 3.3 V systems where Zener diodes fail. |
| Industrial temperature range | −40°C to +85°C operation ensures reliability in automotive ECUs, industrial PLCs, and outdoor power supplies. |
| Stable with capacitive loads | Functional with 10 nF–50 pF capacitive loads-supports direct connection to switching regulator feedback nodes without oscillation. |
| Low output impedance | 0.25 Ω dynamic impedance maintains tight regulation under varying load transients in error amplifier applications. |
| Fast turn-on response | Enables rapid activation in power-good detection and crowbar protection circuits without startup delay. |
Applications
| Overvoltage Protection | 3-V Off-Line Switching Regulator |
|---|---|
Use Scenario: Monitors DC bus voltage in telecom power modules to trigger shutdown before damage occurs. IC Role / Device Role / Timing Role: Precision voltage detector comparing bus voltage against 1.24 V reference via resistor divider. Use Value: Achieves ±0.5% trip accuracy over temperature, eliminating need for trimming or calibration. |
Use Scenario: Provides feedback voltage reference for primary-side controller in 3 V-input flyback converters. IC Role / Device Role / Timing Role: Adjustable shunt reference setting output voltage via external R1/R2 network. Use Value: Enables 3.3 V–12 V programmable outputs with <±6 mV drift over −40°C to +85°C. |
| Voltage Monitor | Low Dropout N-Channel Series Regulator |
Use Scenario: Tracks battery voltage in portable medical devices to warn of end-of-charge or fault conditions. IC Role / Device Role / Timing Role: Reference element in comparator-based threshold detection circuit with hysteresis. Use Value: Delivers 1.24 V reference with 39 ppm/°C stability, ensuring consistent thresholds across operating environment. |
Use Scenario: Forms error amplifier in linear post-regulator stage following a buck converter for noise-sensitive analog rails. IC Role / Device Role / Timing Role: High-gain, low-impedance reference driving gate of external N-channel MOSFET. Use Value: 0.25 Ω output impedance and 55 µA quiescent current minimize dropout and idle power loss. |
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 rated only for 0°C to +70°C commercial range. | Lacks industrial temperature support; unsuitable for automotive or extended-temperature industrial use. | Select when cost sensitivity outweighs temperature range requirements and ambient stays within 0–70°C. |
| LM4040CIM3-ADJ/NOPB | Adjustable shunt reference with 0.5% tolerance, but higher 70 µA min cathode current and 0.5 Ω output impedance. | Higher quiescent current and impedance reduce efficiency and regulation accuracy in low-power or high-precision loops. | Prefer when existing BOM uses LM4040 family and minor performance trade-offs are acceptable. |
Compared with TLVH431ACDBVR and LM4040CIM3-ADJ/NOPB, the LMV431AIM5X uniquely combines industrial temperature rating, sub-60 µA regulation current, and 0.25 Ω output impedance-making it optimal for high-reliability, low-power, precision feedback designs.
Availability
LMV431AIM5X is available at Aetrix Electronics and suitable for overvoltage protection, 3-V off-line switching regulators, voltage monitors, and low-dropout N-channel series regulators requiring stable component supply and long-term industrial-grade availability.
Supply support for LMV431AIM5X 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 with deep expertise in precision analog and power management ICs.
The LMV431AIM5X belongs to TI's precision shunt regulator product line, engineered specifically for high-accuracy, low-voltage feedback control in industrial, telecom, and automotive power systems.
FAQ
What is the operating temperature range of the LMV431AIM5X?
The LMV431AIM5X is rated for −40°C to +85°C industrial temperature operation. This range is confirmed in Section 7.3 (Recommended Operating Conditions) and Table 7.8 (LMV431AI Electrical Characteristics) of the SNVS041G datasheet, making it suitable for demanding environments such as factory automation controllers and automotive body electronics where thermal stability is critical.
Does the LMV431AIM5X require external compensation for stability?
No, the LMV431AIM5X is internally compensated and stable with capacitive loads between 10 nF and 50 pF, as stated in the Applications section and Figure 19 (Stability Boundary Condition). This eliminates the need for external compensation components in most shunt regulator and error amplifier configurations, simplifying layout and reducing BOM count.
How is the output voltage programmed on the LMV431AIM5X?
The LMV431AIM5X output voltage is programmed using two external resistors (R1 and R2) forming a voltage divider from cathode to adjust pin. Per the functional diagram and Equation in Section 8.1, VCATHODE = 1.24 V × (1 + R1/R2). This allows precise adjustment from 1.24 V up to 30 V without trimming or calibration.
What is the minimum cathode current needed for regulation in the LMV431AIM5X?
The LMV431AIM5X requires a minimum cathode current of 55 µA to maintain regulation, as specified in the IZ(MIN) parameter across all LMV431AI electrical characteristic tables (Section 7.8). This low current enables use in ultra-low-power applications such as battery voltage monitors and always-on supervisory circuits.
Is the LMV431AIM5X pin-compatible with other LMV431 variants?
Yes-the LMV431AIM5X shares the identical SOT-23-5 (DBV) pinout with all LMV431xM5/NOPB variants, including LMV431ACM5X and LMV431BCM5X. Pin assignments (NC, Anode, Cathode, Adjust, Anode) are consistent per Section 6 (Pin Configurations and Functions) of the datasheet, enabling drop-in replacement within the same grade family.
LMV431AIM5X 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%
- 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
LMV431AIM5X FAQ
1.How can I place an order for LMV431AIM5X through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV431AIM5X 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 LMV431AIM5X reliable?
The price and inventory of LMV431AIM5X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV431AIM5X is usually 5 days.
3.What payment methods are accepted for LMV431AIM5X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV431AIM5X transactions.
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4.How is shipping managed for LMV431AIM5X?
LMV431AIM5X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV431AIM5X 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 LMV431AIM5X?
For technical support, including LMV431AIM5X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV431AIM5X requirements.
6.How does Aetrix verify that LMV431AIM5X is sourced from the original manufacturer or authorized distributors?
All LMV431AIM5X 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 LMV431AIM5X meets industry standards.
7.What is the process for return or replacement of LMV431AIM5X?
All LMV431AIM5X units undergo pre-shipment inspection (PSI). If there is an issue with LMV431AIM5X, 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 LMV431AIM5X part is unused and in its original packaging.
Return procedure for LMV431AIM5X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV431AIM5X Tags
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TL431AIDBZR
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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
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