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Texas Instruments LM2931AS-5.0/NOPB
- Part No.:
- LM2931AS-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
LM2931AS-5.0/NOPB.pdf
- Description:
- IC REG LIN 5V 100MA DDPAK/TO263
- Quantity:
- Payment:
- Shipping:
Inventory:456
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Product details
Overview
LM2931AS-5.0/NOPB from Texas Instruments is a fixed-output 5.0 V, low-dropout linear regulator in TO-263 (DDPAK) package, delivering ≥100 mA output current with ≤0.6 V input-output differential at 100 mA and reverse battery protection up to −50 V. It operates across −40°C to +85°C and is designed for automotive memory standby and low-power processor supplies.
For engineers reviewing the LM2931AS-5.0/NOPB datasheet, LM2931AS-5.0/NOPB pinout, LM2931AS-5.0/NOPB application, or LM2931AS-5.0/NOPB equivalent, key selection criteria include dropout voltage at 100 mA, load dump tolerance (60 V), quiescent current under light load (≤1.0 mA), and thermal performance in surface-mount power applications.
Technical Context
The LM2931AS-5.0/NOPB integrates internal thermal overload and short-circuit protection, with automatic shutdown during 60 V load dump transients. Its architecture includes reverse polarity protection circuitry enabling safe operation under −50 V transient conditions and mirror-image insertion immunity.
It requires a minimum 100 μF output capacitor for stability, with ESR sensitivity confirmed across temperature extremes. The device maintains regulation down to 0.2 V dropout at 10 mA and supports input voltages up to 26 V DC, with line regulation of ≤4 mV over 6–26 V input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±3.8% (A-grade tolerance), stable across −40°C to +85°C ambient |
| Max Output Current | ≥100 mA continuous, with internal current limiting and thermal foldback |
| Dropout Voltage | 0.6 V max at 100 mA load - enables regulation from 5.6 V input in worst-case conditions |
| Quiescent Current | ≤1.0 mA at ≤10 mA load - critical for battery-backed memory standby systems |
| Input Voltage Range | 6 V to 26 V DC operating; withstands 60 V load dump and −50 V reverse transients |
| Protection Features | Reverse battery (−50 V), load dump (60 V), short-circuit, thermal overload, and mirror-image insertion |
| Operating Temp | −40°C to +85°C junction - validated for automotive under-hood and industrial control environments |
Pinout & Package
LM2931AS-5.0/NOPB uses the DDPAK/TO-263 (KTT) 3-pin surface-mount package with exposed thermal pad. Pin 1 is Input, Pin 2 is Ground, Pin 3 is Output - matching standard TO-263 pinout orientation per TI package drawing KTT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Unregulated input supply connection | Accepts 6–26 V DC; internally clamped to survive 60 V transients and −50 V reverse events |
| Pin 2 (GND) | Power ground reference | Common return for input, output, and internal protection circuitry; must be low-impedance |
| Pin 3 (OUT) | Regulated 5.0 V output | Delivers ≥100 mA; requires ≥100 μF low-ESR output capacitor for stability across temperature |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout operation | 0.2 V typical at 10 mA - extends usable battery life in 6 V nominal systems |
| Reverse battery protection | Withstands −50 V transient without damage - eliminates need for external series diode |
| Load dump immunity | Shuts down automatically during 60 V/1 ms transients - protects downstream logic and memory |
| Thermal shutdown | Activates at 125°C junction - prevents permanent failure during sustained overload or poor heatsinking |
| Stable with ceramic or electrolytic caps | Validated with ≥100 μF aluminum or 47 μF tantalum - simplifies BOM and layout |
Applications
| Automotive Memory Standby | Industrial Sensor Node Power |
|---|---|
Use Scenario: Maintaining SRAM or real-time clock power during vehicle ignition-off periods using 12 V battery with wide voltage swing and transients. IC Role / Device Role / Timing Role: Primary 5 V LDO supplying always-on logic while minimizing quiescent drain. Use Value: ≤1.0 mA quiescent current extends battery hold-up time; −50 V reverse protection avoids diode drop and heat loss. | Use Scenario: Powering low-power microcontrollers and analog sensors in remote industrial monitoring nodes powered by 24 V DC rails. IC Role / Device Role / Timing Role: Local point-of-load regulator converting 24 V to clean, stable 5 V for mixed-signal ICs. Use Value: 60 V load dump immunity prevents field failures during PLC switching; TO-263 thermal pad enables conduction cooling on metal-core PCBs. |
| Medical Portable Device Logic Supply | Test Equipment Auxiliary Rail |
Use Scenario: Providing isolated 5 V rail for microcontroller and display logic in battery-operated handheld diagnostics tools. IC Role / Device Role / Timing Role: Low-noise, transient-immune regulator ensuring reliable boot and operation during battery swap or charger disconnect. Use Value: 500 μVrms output noise avoids interference with sensitive ADC references; 0.6 V dropout allows use with partially discharged Li-ion cells. | Use Scenario: Generating auxiliary 5 V supply for FPGA configuration, USB interface, or calibration DACs in benchtop test instruments. IC Role / Device Role / Timing Role: Secondary regulated rail decoupled from main SMPS to reduce switching noise coupling. Use Value: Internal short-circuit protection prevents damage during probe shorts; SOIC-8 and TO-263 variants allow flexible layout for noise-sensitive sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2931T-5.0/NOPB | TO-220-3 through-hole package; identical electrical specs but higher θJA (50°C/W vs 73°C/W for TO-263) | Preferred for prototyping or low-volume assemblies where manual soldering is used | Select when board assembly process does not support surface-mount power packages or thermal pad reflow. |
| TLV73350PDBVR | Lower quiescent current (40 µA), smaller SOT-23-5 package, but only 300 mA rated and no load dump protection | Suitable for ultra-low-power IoT endpoints, not automotive or industrial transients | Choose only for space-constrained, non-transient environments where <100 µA IQ is mandatory and 60 V immunity is unnecessary. |
Compared with LM2931T-5.0/NOPB, the LM2931AS-5.0/NOPB offers superior thermal resistance in surface-mount layouts and identical protection features; versus TLV73350PDBVR, it trades ultra-low IQ for robust 60 V/−50 V transient handling essential in automotive and industrial settings.
Availability
LM2931AS-5.0/NOPB is available at Aetrix Electronics and suitable for automotive memory standby, industrial sensor node power, and medical portable device logic supply requiring stable component supply across extended temperature and transient-prone environments.
Supply support for LM2931AS-5.0/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 power management ICs for automotive, industrial, and personal electronics.
The LM2931-N series was engineered specifically for automotive and industrial applications demanding high transient immunity, reverse polarity resilience, and low-quiescent-current operation in standby modes.
FAQ
What is the maximum input voltage for LM2931AS-5.0/NOPB under normal DC operation?
The LM2931AS-5.0/NOPB has a maximum continuous DC input voltage rating of 26 V. It is not rated for sustained operation above this level, though its internal protection circuitry will activate during transient overvoltage events such as 60 V load dumps. For reliable long-term operation, design inputs to remain within 6–26 V DC per the datasheet's operating range specification for the LM2931AS-5.0/NOPB.
Does LM2931AS-5.0/NOPB require an external output capacitor, and what value is recommended?
Yes, the LM2931AS-5.0/NOPB requires a minimum 100 μF output capacitor for stability across its full temperature and load range. Aluminum electrolytic or tantalum types are validated; ESR is critical - values outside the specified window cause oscillation. The LM2931AS-5.0/NOPB datasheet explicitly states C2 must be ≥100 μF and rated for the same operating temperature range as the regulator.
What protection features are integrated into LM2931AS-5.0/NOPB?
The LM2931AS-5.0/NOPB integrates reverse battery protection (−50 V transient), 60 V load dump shutdown, short-circuit current limiting, internal thermal overload protection, and mirror-image insertion immunity. These features eliminate the need for external protection components in automotive and industrial designs, directly enhancing system reliability without adding board area or cost.
Is LM2931AS-5.0/NOPB pin-compatible with other packages in the LM2931-N family?
No - the LM2931AS-5.0/NOPB is a 3-pin TO-263 (KTT) device with IN-GND-OUT pinout, while SOIC-8 (e.g., LM2931AM-5.0/NOPB) and 5-pin TO-220/TO-263 variants have different pin counts and functions (including ON/OFF control). There is no pin-to-pin compatibility between LM2931AS-5.0/NOPB and other package variants; layout and schematic changes are required for substitution.
What is the thermal resistance (θJA) of LM2931AS-5.0/NOPB in its standard mounting configuration?
The LM2931AS-5.0/NOPB in the DDPAK/TO-263 (KTT) package has a typical junction-to-ambient thermal resistance (θJA) of 73°C/W with standard PCB copper. This improves to 50°C/W with 0.5 in² copper area, 37°C/W with 1 in², and 32°C/W with ≥1.6 in² - all verified in the LM2931AS-5.0/NOPB datasheet. Thermal performance must be validated per actual board layout.
LM2931AS-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 26V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 15 mA
- Current - Supply (Max):
- 30 mA
- PSRR:
- 80dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-3)
LM2931AS-5.0/NOPB FAQ
1.How can I place an order for LM2931AS-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2931AS-5.0/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 LM2931AS-5.0/NOPB reliable?
The price and inventory of LM2931AS-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2931AS-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2931AS-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2931AS-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2931AS-5.0/NOPB?
LM2931AS-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2931AS-5.0/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 LM2931AS-5.0/NOPB?
For technical support, including LM2931AS-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2931AS-5.0/NOPB requirements.
6.How does Aetrix verify that LM2931AS-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2931AS-5.0/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 LM2931AS-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2931AS-5.0/NOPB?
All LM2931AS-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2931AS-5.0/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 LM2931AS-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2931AS-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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