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Texas Instruments LMV431CM5/NOPB
- Part No.:
- LMV431CM5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV431CM5/NOPB.pdf
- Description:
- IC VREF SHUNT ADJ 1.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,832
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Product details
Overview
LMV431CM5/NOPB from Texas Instruments is a precision 1.24-V adjustable shunt regulator in SOT-23-5 package, supporting cathode voltage adjustment from 1.24 V to 30 V via external resistor divider. It delivers 0.5% initial reference voltage tolerance (LMV431B grade), 39 ppm/°C temperature coefficient, 55 µA minimum regulation current, and 0.25 Ω dynamic output impedance. Used as error amplifier in 3-V off-line switching regulators and low-dropout shunt regulators.
For engineers reviewing the LMV431CM5/NOPB datasheet, LMV431CM5/NOPB pinout, LMV431CM5/NOPB application, or LMV431CM5/NOPB equivalent, key selection criteria include reference voltage accuracy over temperature, cathode current range (0.1–15 mA), capacitive load stability (10 nF–50 pF), and SOT-23-5 thermal performance (RθJA = 455°C/W).
Technical Context
The LMV431CM5/NOPB implements a band-gap reference core with negative feedback from cathode to adjust pin, operating like a non-inverting op-amp configuration. Its reference input current is ultra-low (0.15–0.5 µA typ), enabling high-impedance voltage divider networks without loading error.
It achieves stable operation with capacitive loads between 10 nF and 50 pF and supports cathode voltages up to 30 V. The device functions across 0°C to 70°C (commercial grade) and features fast turn-on response suitable for dynamic error-sensing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.24 V (typ), ±0.5% initial tolerance at 25°C - enables precise voltage setpoint control in feedback loops |
| Temperature Coefficient | 39 ppm/°C - ensures ≤12 mV drift over full 0°C–70°C range for stable regulation |
| Dynamic Output Impedance | 0.25 Ω (typ) - maintains tight output regulation under varying cathode current (0.1–15 mA) |
| Min Cathode Current | 55 µA - allows regulation at ultra-low power, critical for battery-backed or energy-harvesting systems |
| Cathode Voltage Range | 1.24 V to 30 V - supports wide-output adjustable shunt regulation without external pass devices |
| Reference Input Current | 0.15–0.5 µA (typ) - permits use of high-value resistor dividers (>1 MΩ), minimizing quiescent current |
| Capacitive Load Stability | Stable with 10 nF–50 pF - simplifies compensation in voltage monitor or crowbar circuits |
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 thermal benefit |
| Pin 2 (Anode) | Anode terminal | Connected to system ground or low-side return path; defines reference potential |
| Pin 3 (Cathode) | Cathode output | Delivers regulated current; connects to feedback node or pass element gate/base |
| Pin 4 (Adjust) | Reference input | High-impedance node sensing divided cathode voltage; sets regulation point via R1/R2 |
| Pin 5 (Anode) | Second anode connection | Internally tied to Pin 2; improves thermal dissipation and current handling in SOT-23-5 layout |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | 1.24-V reference enables regulation in 1.8-V and 3-V systems where Zener diodes fail |
| 0.5% initial tolerance (LMV431B grade) | Reduces need for post-manufacture calibration in precision power supplies and voltage monitors |
| Low 55-µA regulation threshold | Supports standby-mode regulation in always-on circuits without compromising efficiency |
| 0.25-Ω dynamic output impedance | Maintains <±10 mV output deviation across 15-mA cathode current swing |
| Stability with small capacitive loads | Operates reliably with 10-nF to 50-pF bypass caps-ideal for compact space-constrained designs |
Applications
| Shunt Regulator | Series Regulator |
|---|---|
|
Use Scenario: Replacing Zener diodes in low-voltage (<3 V) power rails where standard Zeners lack precision or stability. IC Role / Device Role / Timing Role: Adjustable shunt reference providing programmable voltage clamp and current sink. Use Value: Enables 1.24–30 V regulation with 0.5% accuracy and 39 ppm/°C drift-unachievable with discrete Zeners. |
Use Scenario: Error amplifier in N-channel MOSFET-based series regulators for 3-V battery-powered equipment. IC Role / Device Role / Timing Role: Precision voltage comparator driving gate of pass transistor to regulate output. Use Value: Delivers <10 mV load regulation error and fast transient response due to low output impedance (0.25 Ω). |
| Voltage Monitor | Current Source/Sink |
|
Use Scenario: Overvoltage detection in USB-powered peripherals triggering shutdown before IC damage occurs. IC Role / Device Role / Timing Role: Threshold detector comparing sensed rail to internal 1.24-V reference via resistor divider. Use Value: Achieves ±12 mV trip-point accuracy over 0°C–70°C using only two external resistors and no trimming. |
Use Scenario: Constant-current LED driver in portable instrumentation requiring stable brightness across battery discharge. IC Role / Device Role / Timing Role: Shunt-controlled current source with cathode current proportional to reference voltage and sense resistor. Use Value: Provides ±1% current accuracy with <0.1% line regulation-no op-amp or external transistor needed. |
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, 0.5% tolerance, SOT-23-5, but higher 75-µA min cathode current and 0.35-Ω output impedance | Less suitable for ultra-low-power (<100 µA) regulation; requires larger R1/R2 values to maintain accuracy | Select when higher cathode current headroom is acceptable and TI second-source compatibility is required |
| AS431ARTDT-33 | 1.24-V reference, 1% tolerance, SOT-23-5, 80-µA min cathode current, 0.5-Ω output impedance, −40°C to 85°C rating | Lower accuracy and higher impedance limit use in precision feedback or low-current monitoring | Choose for cost-sensitive industrial applications where ±1% regulation and extended temp range outweigh precision needs |
Compared with TLVH431ACDBVR and AS431ARTDT-33, the LMV431CM5/NOPB offers superior regulation accuracy (0.5%), lower output impedance (0.25 Ω), and lowest min cathode current (55 µA), making it optimal for battery-critical and high-precision shunt regulation.
Availability
LMV431CM5/NOPB is available at Aetrix Electronics and suitable for shunt regulators, series regulators, voltage monitors, and current sources requiring stable component supply in commercial-temperature embedded power management.
Supply support for LMV431CM5/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 specializing in analog and embedded processing technologies, with decades of expertise in precision voltage references and power management ICs.
The LMV431 family was designed for low-voltage, high-accuracy shunt regulation in space-constrained and energy-efficient systems-targeting 3-V switching supplies, battery monitors, and programmable current sources.
FAQ
What is the reference voltage tolerance of LMV431CM5/NOPB over temperature?
The LMV431CM5/NOPB has a 0.5% initial reference voltage tolerance at 25°C and exhibits a maximum deviation of ±12 mV over its full 0°C to 70°C operating range, corresponding to a temperature coefficient of 39 ppm/°C. This specification is confirmed in the LMV431BC electrical characteristics table (Section 7.9) of the official TI datasheet SNVS041G.
Can LMV431CM5/NOPB operate with a 10-nF capacitive load?
Yes, the LMV431CM5/NOPB is explicitly characterized for stable operation with capacitive loads from 10 nF up to 50 pF, as stated in the Applications section and verified in Figure 19 (Stability Boundary Condition). This makes it suitable for direct connection to small bypass caps in compact voltage monitor or error amplifier circuits without external compensation.
What is the minimum cathode current required for regulation in LMV431CM5/NOPB?
The LMV431CM5/NOPB requires a minimum cathode current of 55 µA to maintain regulation, per the IZ(MIN) parameter in Section 7.9 of the datasheet. This low threshold enables reliable operation in ultra-low-power applications such as battery-backed supervisors or energy-harvesting systems where current budgets are sub-100 µA.
How does the pin configuration of LMV431CM5/NOPB differ from the 3-pin SOT-23 variant?
The LMV431CM5/NOPB uses a 5-pin SOT-23 (DBV) package with Pins 2 and 5 both internally connected to the Anode, improving thermal dissipation and current handling. In contrast, the 3-pin SOT-23 (DBZ) version has only one anode pin. Pin 1 is NC and must remain unconnected; this dual-anode layout is unique to the 5-pin variant and documented in the Pin Configurations section (Page 3) of SNVS041G.
Is LMV431CM5/NOPB RoHS-compliant and what is its moisture sensitivity level?
Yes, the LMV431CM5/NOPB is RoHS-compliant with Sn (matte tin) lead finish and carries a Moisture Sensitivity Level (MSL) rating of Level-1 at 260°C unlimited reflow, as specified in TI's Packaging Information addendum. This allows standard SMT assembly without dry-pack or baking requirements, simplifying manufacturing for high-volume production.
LMV431CM5/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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMV431CM5/NOPB FAQ
1.How can I place an order for LMV431CM5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV431CM5/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 LMV431CM5/NOPB reliable?
The price and inventory of LMV431CM5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV431CM5/NOPB is usually 5 days.
3.What payment methods are accepted for LMV431CM5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV431CM5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV431CM5/NOPB?
LMV431CM5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV431CM5/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 LMV431CM5/NOPB?
For technical support, including LMV431CM5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV431CM5/NOPB requirements.
6.How does Aetrix verify that LMV431CM5/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV431CM5/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 LMV431CM5/NOPB meets industry standards.
7.What is the process for return or replacement of LMV431CM5/NOPB?
All LMV431CM5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV431CM5/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 LMV431CM5/NOPB part is unused and in its original packaging.
Return procedure for LMV431CM5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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