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Texas Instruments LM3490IM5-12/NOPB
- Part No.:
- LM3490IM5-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM3490IM5-12/NOPB.pdf
- Description:
- IC REG LINEAR 12V 100MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,061
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Product details
Overview
LM3490IM5-12/NOPB from Texas Instruments is a 12 V, 100 mA quasi-low-dropout linear voltage regulator in a 5-pin SOT-23 package, featuring logic-controlled ON/OFF enable functionality, 1.2 V maximum dropout at full load, ±5% output voltage tolerance over −40°C to +125°C, and operation up to 30 V input. It serves as a compact bias supply for analog circuits and post-regulator for switching DC/DC converters.
For engineers reviewing the LM3490IM5-12/NOPB datasheet, LM3490IM5-12/NOPB pinout, LM3490IM5-12/NOPB application, or LM3490IM5-12/NOPB equivalent, key selection considerations include its 12 V fixed output, 100 mA load capability, SOT-23 thermal limitations, logic-enable interface thresholds (VIL = 0.2 V max, VIH = 2.0 V min), and dropout behavior across temperature and load.
Technical Context
The LM3490IM5-12/NOPB integrates a PNP pass transistor with internal current limiting and thermal shutdown, enabling stable regulation without external compensation. Its quasi-LDO architecture delivers 12 V output with dropout as low as 0.7 V at 10 mA and ≤1.2 V at 100 mA across −40°C to +125°C junction temperature.
Logic control is implemented via a dedicated ON/OFF pin requiring active termination-no internal pull-up/pull-down-with defined VIH (≥2.0 V) and VIL (≤0.2 V) thresholds. Ground pin current remains ≤4 mA when enabled and ≤5 µA when disabled, supporting low-quiescent-power subsystem management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12.0 V nominal, ±5% tolerance (11.4–12.6 V) over full load and temperature range |
| Max Input Voltage | 30 V-supports direct regulation from unregulated 24 V rails or legacy industrial supplies |
| Dropout Voltage | ≤1.2 V at 100 mA load-enables operation with only 13.2 V input at full rated output |
| Load Current | 100 mA continuous-sufficient for analog sensor biasing, op-amp supplies, and microcontroller peripherals |
| Operating Temp | −40°C to +125°C junction temperature-qualified for under-hood automotive and industrial environments |
| ON/OFF Thresholds | VIL ≤ 0.2 V (disable), VIH ≥ 2.0 V (enable)-compatible with 3.3 V and 5 V logic families |
| Ground Current | ≤4 mA enabled, ≤5 µA disabled-minimizes system standby power consumption |
Pinout & Package
LM3490IM5-12/NOPB uses the standard 5-lead SOT-23 (DBV) package: 2.9 mm × 1.6 mm × 1.1 mm body, gull-wing leads, JEDEC Level-1 moisture sensitivity, RoHS-compliant green finish (Pb-free, no Sb/Br).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 3.5–30 V input; requires local 0.1 µF ceramic decoupling |
| 2 (GND) | Ground reference | Common return for output, ground pin current, and ON/OFF logic reference |
| 3 (ON/OFF) | Enable/disable control | Active-high logic input; must be terminated-no floating allowed |
| 4 (OUT) | Regulated output | 12 V ±5% output; requires 0.1 µF ceramic output capacitor for stability |
| 5 (NC) | No connect | Internally unused; left unconnected per TI DBV package specification |
Key Features
| Feature | Design Value |
|---|---|
| Quasi-LDO architecture | 1.2 V max dropout at 100 mA enables use where true LDOs are unnecessary but LM78LXX dropout is too high |
| Logic-controlled ON/OFF | Digital enable/disable with rail-compatible thresholds eliminates need for external MOSFET switches |
| SOT-23 footprint | 5-pin, 2.9 × 1.6 mm package reduces PCB area by >70% vs. TO-92 or SOIC-8 alternatives |
| Wide input range | 30 V max input supports direct regulation from 24 V industrial buses without pre-regulation |
| Thermal protection | Internal junction temperature limit (~150°C) prevents damage during overload or poor heatsinking |
Applications
| Industrial Sensor Biasing | Post-Regulation for DC/DC Converters |
|---|---|
Use Scenario: Powering precision analog sensors (e.g., RTD transmitters, strain gauge amplifiers) in factory automation systems. IC Role / Device Role / Timing Role: Provides clean, stable 12 V bias supply isolated from noisy switching converter outputs. Use Value: 12 V output matches common sensor excitation requirements; ±5% tolerance ensures measurement accuracy; low noise (360 µVrms) avoids signal corruption. |
Use Scenario: Tightening output regulation of a 15 V buck converter feeding analog front-end circuitry. IC Role / Device Role / Timing Role: Acts as precision post-regulator to reject ripple and improve line/load transient response. Use Value: 1.2 V dropout allows operation with minimal headroom; 100 mA capacity covers auxiliary analog loads; logic enable synchronizes with system power sequencing. |
| Analog Circuit Power Supply | Subsystem Enable Control |
Use Scenario: Supplying op-amps, ADC references, and DAC buffers in data acquisition modules. IC Role / Device Role / Timing Role: Delivers low-noise, thermally stable 12 V rail decoupled from digital supply domains. Use Value: −40°C to +125°C operation ensures reliability in extended-temperature enclosures; 360 µVrms output noise preserves SNR in 16-bit+ systems. |
Use Scenario: Enabling/disabling a motor driver subsystem in battery-powered portable equipment. IC Role / Device Role / Timing Role: Regulator enables power delivery only when commanded by MCU GPIO. Use Value: ON/OFF pin draws ≤5 µA when disabled-reducing quiescent current to near-zero; VIH/VIL thresholds ensure robust logic interfacing with 3.3 V MCUs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV71212PDQNR | True LDO (250 mV dropout), 150 mA, same SOT-23-5 package, but no ON/OFF pin | Lacks logic enable-requires external FET for subsystem control; better for ultra-low-headroom 12 V apps | Select if dropout <0.5 V is critical and enable function can be added externally |
| LP2951ACM-12.0/NOPB | Adjustable/fixed 12 V, 100 mA, includes error flag and shutdown, SOIC-8 package | Larger footprint, higher pin count, integrated power-good signaling-suited for safety-critical monitoring | Select if system-level fault reporting or PCB real estate permits SOIC-8 |
Compared with TLV71212PDQNR and LP2951ACM-12.0/NOPB, LM3490IM5-12/NOPB uniquely combines 12 V fixed output, 1.2 V dropout, logic enable, and SOT-23-5 in a single cost-optimized device-ideal where space, simplicity, and moderate dropout are prioritized over ultra-low dropout or diagnostic features.
Availability
LM3490IM5-12/NOPB is available at Aetrix Electronics and suitable for industrial sensor biasing, analog circuit power supply, and subsystem enable control requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM3490IM5-12/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, embedded processing, and connectivity technologies, with decades of expertise in power management IC design and manufacturing.
The LM3490 series was developed as a compact, cost-effective alternative to legacy 78LXX regulators-targeting space-constrained industrial, automotive, and consumer applications needing fixed-output, logic-controllable linear regulation.
FAQ
What is the maximum input voltage rating for LM3490IM5-12/NOPB?
The LM3490IM5-12/NOPB has an absolute maximum input voltage of 35 V, but its specified operating maximum is 30 V. Operation above 30 V risks exceeding safe power dissipation limits and may trigger thermal shutdown. For reliable long-term use, keep VIN ≤30 V with adequate PCB copper pour for thermal management.
Does LM3490IM5-12/NOPB require an output capacitor, and what value is recommended?
Yes, LM3490IM5-12/NOPB requires a minimum 0.1 µF ceramic capacitor on the OUT pin for stability, as confirmed in the TI datasheet Figure 1 and Application Information section. Larger values (e.g., 1–10 µF) improve transient response but are not mandatory. X7R or X5R dielectrics are preferred for temperature stability.
Can the ON/OFF pin of LM3490IM5-12/NOPB be left floating?
No-the ON/OFF pin of LM3490IM5-12/NOPB must never be left floating. TI explicitly states that undefined output status results from an unterminated ON/OFF pin. A pull-up to VIN or pull-down to GND (with appropriate resistor value) is required to ensure predictable enable/disable behavior.
What is the dropout voltage of LM3490IM5-12/NOPB at 100 mA and 125°C junction temperature?
The LM3490IM5-12/NOPB specifies a maximum dropout voltage of 1.2 V at 100 mA load across the full operating junction temperature range (−40°C to +125°C). This value is guaranteed-not typical-and applies under worst-case process, voltage, and temperature conditions per the Electrical Characteristics table.
Is LM3490IM5-12/NOPB pin-compatible with other LM3490 variants like LM3490IM5-5.0/NOPB?
Yes-LM3490IM5-12/NOPB shares identical SOT-23-5 (DBV) package, pinout, and footprint with all LM3490IM5-x.x/NOPB variants (e.g., 3.3 V, 5.0 V, 15 V). Output voltage is laser-trimmed during test; no external components differ. This enables board-level voltage optioning without layout changes.
LM3490IM5-12/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.2V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 4 mA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM3490IM5-12/NOPB FAQ
1.How can I place an order for LM3490IM5-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3490IM5-12/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 LM3490IM5-12/NOPB reliable?
The price and inventory of LM3490IM5-12/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3490IM5-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM3490IM5-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3490IM5-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3490IM5-12/NOPB?
LM3490IM5-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3490IM5-12/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 LM3490IM5-12/NOPB?
For technical support, including LM3490IM5-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3490IM5-12/NOPB requirements.
6.How does Aetrix verify that LM3490IM5-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3490IM5-12/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 LM3490IM5-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM3490IM5-12/NOPB?
All LM3490IM5-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3490IM5-12/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 LM3490IM5-12/NOPB part is unused and in its original packaging.
Return procedure for LM3490IM5-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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