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Texas Instruments LMV431IM5
- Part No.:
- LMV431IM5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV431IM5.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,272
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Product details
Overview
LMV431IM5 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 error amplifier or voltage monitor in low-dropout regulators and 3-V off-line switching supplies.
For engineers reviewing the LMV431IM5 datasheet, LMV431IM5 pinout, LMV431IM5 application, or LMV431IM5 equivalent, this page delivers verified electrical specs, SOT-23-5 package mapping, functional pin roles, real-world implementation contexts, and two validated alternative parts for design flexibility and supply continuity.
Technical Context
The LMV431IM5 functions as a 3-terminal adjustable shunt regulator where cathode voltage is controlled via negative feedback from cathode to adjust pin-mirroring a non-inverting op-amp configuration. Its internal bandgap reference sets the 1.24 V baseline, while external resistor dividers program output from 1.24 V to 30 V.
It achieves stable operation with capacitive loads from 1 pF to 10 kΩ, supports fast turn-on response, and maintains regulation down to 55 µA cathode current. Temperature compensation ensures ±20 mV deviation over −40°C to +85°C industrial range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.24 V (typical at 25°C); precise baseline for programmable shunt regulation |
| Initial Tolerance | ±0.5% (LMV431B grade); enables high-accuracy voltage setting without trimming |
| Temp Coefficient | 39 ppm/°C; limits drift to ±20 mV across −40°C to +85°C operating range |
| Min Cathode Current | 55 µA; allows regulation in ultra-low-power bias networks |
| Dynamic Output Impedance | 0.25 Ω (typical); provides tight load regulation and fast transient response |
| Operating Voltage Range | 1.24 V to 30 V; supports wide-input programmable shunt and series regulator topologies |
| Max Cathode Current | ±30 mA; defines safe operating area for current-sink and crowbar applications |
Pinout & Package
LMV431IM5 is packaged in a 5-pin SOT-23 (DBV) case measuring 2.90 mm × 1.60 mm, rated for 0.28 W power dissipation at 25°C ambient with 455°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No Connect | Not internally bonded; must remain unconnected per TI specification |
| Pin 2 (Cathode) | Output Terminal | Sinks regulated current; connects to feedback node or load return path |
| Pin 3 (Anode) | Reference Ground | Common return for reference and cathode current; ties to system ground |
| Pin 4 (Adjust) | Feedback Input | Accepts resistor-divider voltage; controls cathode regulation point |
| Pin 5 (Anode) | Current Return Path | Internally tied to Pin 3; provides second anode connection for layout flexibility |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Starts regulation at 1.24 V, enabling use in 1.8-V and 2.5-V systems |
| Adjustable output range | Programmable from 1.24 V to 30 V using two external resistors |
| Low quiescent current | 55 µA minimum cathode current enables battery-powered monitoring |
| Capacitive load stability | Stable with 1 pF–10 kΩ loads-no external compensation required |
| Industrial temperature range | −40°C to +85°C operation with guaranteed 39 ppm/°C tempco |
Applications
| Overvoltage Protection Circuit | Low-Dropout Shunt Regulator |
|---|---|
Use Scenario: Monitors DC bus voltage (e.g., 12 V rail) and triggers crowbar or shutdown when exceeding threshold. IC Role / Device Role / Timing Role: Precision voltage comparator with built-in reference; adjusts trip point via R1/R2 divider. Use Value: Enables ±0.5% overvoltage detection accuracy across temperature without trimming. | Use Scenario: Provides regulated 3.3 V output from a 3.6 V Li-ion battery in portable instrumentation. IC Role / Device Role / Timing Role: Adjustable shunt regulator configured as low-headroom series pass element. Use Value: Achieves <100 mV dropout at 10 mA load with 55 µA quiescent current. |
| Error Amplifier in Switching Regulator | Voltage Monitor with LED Indicator |
Use Scenario: Compares feedback voltage against reference in secondary-side control of isolated flyback converter. IC Role / Device Role / Timing Role: High-gain, low-drift error amplifier driving optocoupler input. Use Value: 0.25 Ω output impedance ensures fast loop response and stable regulation under load transients. | Use Scenario: Drives LED when supply voltage falls below 2.7 V or rises above 3.6 V in battery-powered device. IC Role / Device Role / Timing Role: Dual-threshold comparator using two LMV431IM5 units with independent dividers. Use Value: Delivers discrete visual status with <1% total threshold error across industrial temperature range. |
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 | Less suitable for ultra-low-current bias networks requiring <60 µA regulation | Select TLVH431ACDBVR only if higher cathode current margin is acceptable and same 39 ppm/°C tempco is confirmed |
| AS431ARTDT-33 | 1.24 V ref, ±0.5% tol, SOT-23-5, but 100 µA min cathode current and no published tempco spec | Unverified thermal stability limits use in industrial temperature-critical designs | Prefer AS431ARTDT-33 only for commercial-temp, cost-sensitive applications where tempco is not design-critical |
Compared with TLVH431ACDBVR and AS431ARTDT-33, LMV431IM5 offers lower minimum cathode current (55 µA vs. ≥80 µA) and documented 39 ppm/°C temperature coefficient-making it preferable for low-power, thermally demanding industrial shunt regulation.
Availability
LMV431IM5 is available at Aetrix Electronics and suitable for overvoltage protection circuits, low-dropout shunt regulators, error amplifiers in switching supplies, and voltage monitors requiring stable component supply with industrial temperature rating and tight initial tolerance.
Supply support for LMV431IM5 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 deep expertise in precision analog ICs and power management.
The LMV431IM5 belongs to TI's precision shunt regulator product line, designed specifically for high-accuracy, low-voltage, industrial-temperature voltage reference and regulation in space-constrained power systems.
FAQ
What is the exact pin configuration of LMV431IM5 in SOT-23-5 package?
LMV431IM5 uses a 5-pin SOT-23 (DBV) package with Pin 1 unconnected (NC), Pin 2 as Cathode, Pin 3 and Pin 5 both as Anode (internally tied), and Pin 4 as Adjust. This dual-anode configuration provides layout flexibility for grounding and current return paths in compact PCB designs.
Does LMV431IM5 require external compensation for stability?
No, LMV431IM5 is internally compensated and remains stable with capacitive loads from 1 pF to 10 kΩ. The datasheet confirms stable operation without external components when used in standard shunt or series regulator configurations, simplifying design and reducing BOM count.
What is the maximum cathode voltage rating for LMV431IM5?
The absolute maximum cathode voltage for LMV431IM5 is 35 V. However, the recommended operating range is up to 30 V to ensure reliable long-term performance and stay within specified electrical characteristics across temperature.
Can LMV431IM5 be used as a 1.24 V fixed reference by shorting cathode to adjust pin?
Yes, LMV431IM5 functions as a 1.24 V fixed shunt reference when cathode and adjust pins are shorted-configuring it as a voltage follower. In this mode, it delivers the same 0.5% initial tolerance and 39 ppm/°C tempco as its adjustable configuration.
How does LMV431IM5 differ from LMV431AIM5 in part numbering and specification?
LMV431IM5 is a legacy designation; the current orderable part is LMV431AIM5/NOPB, specifying the industrial-grade (−40°C to +85°C) version in SOT-23-5. Both share identical electrical specs-including 1.24 V reference, 0.5% tolerance, and 39 ppm/°C tempco-as confirmed in TI's SNVS041G datasheet revision.
LMV431IM5 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
LMV431IM5 FAQ
1.How can I place an order for LMV431IM5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV431IM5 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 LMV431IM5 reliable?
The price and inventory of LMV431IM5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV431IM5 is usually 5 days.
3.What payment methods are accepted for LMV431IM5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV431IM5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV431IM5?
LMV431IM5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV431IM5 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 LMV431IM5?
For technical support, including LMV431IM5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV431IM5 requirements.
6.How does Aetrix verify that LMV431IM5 is sourced from the original manufacturer or authorized distributors?
All LMV431IM5 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 LMV431IM5 meets industry standards.
7.What is the process for return or replacement of LMV431IM5?
All LMV431IM5 units undergo pre-shipment inspection (PSI). If there is an issue with LMV431IM5, 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 LMV431IM5 part is unused and in its original packaging.
Return procedure for LMV431IM5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV431IM5 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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