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Texas Instruments LMV431IM5X/NOPB
- Part No.:
- LMV431IM5X/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV431IM5X/NOPB.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:8,275
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Product details
Overview
LMV431IM5X/NOPB from Texas Instruments is a precision 1.24-V adjustable shunt regulator in SOT-23-5 package, designed for low-voltage (1.24 V to 30 V) voltage reference and error amplification in power management circuits. It delivers 0.5% initial tolerance (LMV431B-grade), 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 offline switching regulators and low-dropout series regulators.
For engineers reviewing the LMV431IM5X/NOPB datasheet, LMV431IM5X/NOPB pinout, LMV431IM5X/NOPB application, or LMV431IM5X/NOPB equivalent, this page provides verified functional specifications, validated pin assignments, confirmed industrial-temperature (-40°C to +85°C) performance data, and real-world implementation guidance for shunt-based feedback loops, overvoltage protection, and current-source designs.
Technical Context
The LMV431IM5X/NOPB implements a band-gap referenced shunt regulator with an internal 1.24-V reference and high-gain transconductance amplifier. Its cathode voltage is controlled via negative feedback from cathode to adjust pin - operating like a non-inverting op-amp configuration with external resistor divider gain setting.
It achieves stability with capacitive loads from 1 pF to 10 kΩ and supports fast turn-on response. The device functions across −40°C to +85°C, exhibits 6 mV max reference deviation over temperature, and maintains low 0.25 Ω dynamic output impedance at 0.1–15 mA cathode current range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.24 V (typical), ±0.5% initial accuracy at 25°C - enables precise voltage setpoint in feedback networks |
| Temperature Coefficient | 39 ppm/°C - ensures <±6 mV drift over full −40°C to +85°C range for industrial applications |
| Dynamic Output Impedance | 0.25 Ω (typical) - minimizes output voltage variation under load transients in shunt-regulated supplies |
| Minimum Cathode Current | 55 µA - defines lowest operating current for stable regulation; critical for ultra-low-power biasing |
| Operating Temperature Range | −40°C to +85°C - qualified for industrial environments without derating |
| Cathode Voltage Range | 1.24 V to 30 V - supports wide output adjustment in series/shunt topologies |
| Reference Input Current | 0.15–0.5 µA - enables high-impedance feedback dividers with minimal loading error |
Pinout & Package
SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, with exposed pad not internally connected. Pin 1 is NC; Pin 2 is internally tied to Anode and must be left floating or connected to Anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | No Connect (NC) | Not internally bonded - must remain unconnected on PCB |
| 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 voltage divider midpoint to set regulated cathode voltage |
| Pin 5 | Anode | Main Anode connection; ties to system ground or return path in shunt configuration |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | 1.24-V reference enables regulation down to 1.24 V - suitable for 1.8-V and 3-V systems |
| 0.5% initial tolerance | LMV431B-grade accuracy reduces need for post-production trimming in precision feedback paths |
| Low 55-µA regulation threshold | Enables stable operation in battery-powered or energy-harvesting circuits with microamp-level standby current |
| 0.25-Ω dynamic output impedance | Minimizes voltage droop during step-load changes - improves transient response in closed-loop regulators |
| Stable with 1 pF–10 kΩ capacitive loads | Eliminates need for external compensation in most applications, including ceramic-output capacitor designs |
Applications
| Shunt Regulator | Series Regulator |
|---|---|
Use Scenario: Precision voltage reference for isolated DC-DC converters using optocoupler feedback. IC Role / Device Role / Timing Role: Shunt regulator providing stable 2.5-V reference at optocoupler LED anode to control primary-side PWM duty cycle. Use Value: 0.5% tolerance and 39 ppm/°C TC ensure <±1% output voltage accuracy across industrial temperature range. |
Use Scenario: Adjustable linear regulator for 3.3-V rail derived from 5-V supply in embedded controller subsystems. IC Role / Device Role / Timing Role: Error amplifier comparing output voltage against 1.24-V internal reference to drive external pass transistor base. Use Value: Low 55-µA minimum cathode current allows regulation even when load draws <100 µA, supporting deep-sleep modes. |
| Voltage Monitor | Current Source/Sink |
Use Scenario: Overvoltage lockout circuit protecting Li-ion battery charging path at 4.3 V threshold. IC Role / Device Role / Timing Role: Adjustable comparator with hysteresis implemented via resistor divider on Adjust pin. Use Value: 1.24-V reference accuracy directly sets trip point; 0.25-Ω output impedance ensures clean switching edge into MOSFET gate. |
Use Scenario: Constant-current LED driver for status indicators in industrial HMIs. IC Role / Device Role / Timing Role: Two-terminal current source where cathode-to-adjust voltage is fixed at 1.24 V, defining current through external resistor. Use Value: Reference stability and low tempco maintain ±2% current accuracy from −40°C to +85°C without calibration. |
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 reference, 1% initial tolerance, SOT-23-5, −40°C to +125°C rating | Higher max junction temperature; wider operating range but looser initial accuracy | Select when extended temperature range is required and 1% tolerance is acceptable |
| LM4040CIM3-ADJ/NOPB | 1.2-V adjustable shunt reference, 0.5% tolerance, SOT-23-3, 65 ppm/°C TC | 3-pin package, higher tempco, no internal amplifier - requires external op-amp for active regulation | Select when board space is constrained and only passive reference function is needed |
Compared with TLVH431ACDBVR and LM4040CIM3-ADJ/NOPB, the LMV431IM5X/NOPB offers tighter 0.5% tolerance and lower 39 ppm/°C temperature coefficient in a 5-pin SOT-23 package that integrates the error amplifier - eliminating external components required by two-terminal references.
Availability
LMV431IM5X/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, battery management systems, and embedded voltage monitoring requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LMV431IM5X/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and power management solutions.
The LMV431 family was designed specifically for low-voltage, high-accuracy shunt regulation in space-constrained industrial and consumer power systems - delivering zener-like functionality with superior stability and temperature performance.
FAQ
What is the operating temperature range of the LMV431IM5X/NOPB?
The LMV431IM5X/NOPB is rated for industrial operation from −40°C to +85°C. This range is confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions tables of the official TI datasheet SNVS041G. The device maintains its 0.5% initial tolerance and 39 ppm/°C temperature coefficient across this full range, making it suitable for harsh-environment applications without thermal derating.
How does the LMV431IM5X/NOPB differ from the LMV431ACM5X/NOPB?
The LMV431IM5X/NOPB features the "I" grade (industrial temperature range: −40°C to +85°C) and "B" accuracy grade (0.5% initial tolerance), while the LMV431ACM5X/NOPB uses the "A" grade (1% tolerance) and "C" temperature grade (0°C to +70°C). Both share identical SOT-23-5 packaging and core electrical characteristics, but LMV431IM5X/NOPB is specified for broader environmental use and tighter voltage accuracy.
Can the LMV431IM5X/NOPB replace a Zener diode in existing designs?
Yes - the LMV431IM5X/NOPB can directly replace standard Zener diodes in shunt regulator and voltage reference applications. Its 1.24-V reference, adjustable up to 30 V via external resistors, low 0.25-Ω dynamic impedance, and superior temperature stability provide more predictable and accurate performance than discrete Zeners, especially below 3.3 V.
What is the minimum cathode current required for regulation in the LMV431IM5X/NOPB?
The LMV431IM5X/NOPB requires a minimum cathode current of 55 µA (typical) to maintain regulation, as specified in the Electrical Characteristics table for IZ(MIN) under LMV431BI conditions. This low threshold enables reliable operation in ultra-low-power applications such as battery-backed monitoring circuits and sleep-mode power rails.
Is the LMV431IM5X/NOPB stable with ceramic output capacitors?
Yes - the LMV431IM5X/NOPB is stable with capacitive loads ranging from 1 pF to 10 kΩ, as documented in Figure 19 (Stability Boundary Condition) of the TI datasheet. This includes common X7R and C0G ceramic capacitors used in modern compact power designs, eliminating the need for series resistance or tantalum alternatives.
LMV431IM5X/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:
- ±1.5%
- 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/NOPB FAQ
1.How can I place an order for LMV431IM5X/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV431IM5X/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 LMV431IM5X/NOPB reliable?
The price and inventory of LMV431IM5X/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV431IM5X/NOPB is usually 5 days.
3.What payment methods are accepted for LMV431IM5X/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV431IM5X/NOPB transactions.
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4.How is shipping managed for LMV431IM5X/NOPB?
LMV431IM5X/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV431IM5X/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 LMV431IM5X/NOPB?
For technical support, including LMV431IM5X/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV431IM5X/NOPB requirements.
6.How does Aetrix verify that LMV431IM5X/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV431IM5X/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 LMV431IM5X/NOPB meets industry standards.
7.What is the process for return or replacement of LMV431IM5X/NOPB?
All LMV431IM5X/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV431IM5X/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 LMV431IM5X/NOPB part is unused and in its original packaging.
Return procedure for LMV431IM5X/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV431IM5X/NOPB Tags
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TL431AIDBZR
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TL431BQDBZR
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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