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Texas Instruments LM3490IM5X-12/NOPB
- Part No.:
- LM3490IM5X-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM3490IM5X-12/NOPB.pdf
- Description:
- IC REG LINEAR 12V 100MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,937
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Product details
Overview
LM3490IM5X-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 LM3490IM5X-12/NOPB datasheet, LM3490IM5X-12/NOPB pinout, LM3490IM5X-12/NOPB application, or LM3490IM5X-12/NOPB equivalent, key selection criteria include its 12 V fixed output, logic-enable interface compatibility with 0–5 V control signals, thermal performance in the DBV (SOT-23) package, and dropout behavior under 100 mA load across temperature.
Technical Context
The LM3490IM5X-12/NOPB implements a quasi-LDO architecture with internal pass transistor and feedback loop optimized for stability with 0.1 µF ceramic output capacitors. Its ON/OFF pin accepts TTL/CMOS-compatible logic levels (VIH ≥ 2.0 V, VIL ≤ 0.2 V) and draws only 0.1 µA when disabled.
It operates across −40°C to +125°C junction temperature with no internal pull-up or pull-down on the ON/OFF pin-requiring external termination-and maintains 11.40 V to 12.60 V output regulation over full load and temperature, with 1.2 V dropout specified at 100 mA and 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12.00 V nominal, 11.40–12.60 V range over full load and −40°C to +125°C - ensures stable bias for 12 V analog rails. |
| Max Input Voltage | 30 V - supports direct regulation from unregulated 24 V industrial or automotive supplies. |
| Dropout Voltage | 1.2 V max at 100 mA and +125°C - enables operation with only 13.2 V input, reducing power loss vs. standard 78LXX regulators. |
| Load Current | 100 mA continuous - sufficient for op-amp biasing, sensor excitation, and low-power microcontroller peripherals. |
| ON/OFF Logic Threshold | VIL ≤ 0.2 V (disable), VIH ≥ 2.0 V (enable) - compatible with 3.3 V and 5 V GPIO without level-shifting. |
| Ground Pin Current | 2 mA max at full load and 5 V ON/OFF - enables accurate efficiency estimation in low-power systems. |
| Operating Temp Range | −40°C to +125°C junction - qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
LM3490IM5X-12/NOPB is housed in a RoHS-compliant, green (Pb-free, Sb/Br-free) 5-lead SOT-23 package (DBV0005A), measuring 2.9 mm × 1.6 mm × 1.1 mm, with moisture sensitivity level (MSL) 1 and 260°C peak reflow rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 3.0–30 V DC; requires local 0.1 µF ceramic decoupling near pin. |
| 2 (GND) | Ground reference | Common return for output, ground pin current, and ON/OFF logic reference. |
| 3 (ON/OFF) | Logic enable/disable control | Active-high: ≥2.0 V enables output; ≤0.2 V disables output; must not float. |
| 4 (OUT) | Regulated output | Delivers 12 V ±5% at up to 100 mA; requires 0.1 µF ceramic capacitor to ground. |
| 5 (NC) | No connect | Internally unused; left unconnected per TI design - no routing or grounding required. |
Key Features
| Feature | Design Value |
|---|---|
| Quasi-LDO architecture | 1.2 V max dropout at 100 mA enables higher efficiency than 78LXX series in space-constrained 12 V systems. |
| Logic-controlled ON/OFF | Digital enable/disable with sub-µA shutdown current allows precise subsystem power sequencing. |
| SOT-23 package (DBV) | 5-pin, footprint-compatible with industry-standard 3.3 mm × 1.75 mm land pattern - simplifies PCB layout reuse. |
| ±5% output tolerance | Specified over full load and temperature - eliminates need for external trimming in cost-sensitive industrial designs. |
| Stable with 0.1 µF ceramic output cap | Reduces BOM count and board area vs. regulators requiring tantalum or larger ceramics. |
Applications
| Industrial Sensor Biasing | Post-Regulation for DC/DC Converters |
|---|---|
|
Use Scenario: Providing clean, stable 12 V bias to precision pressure or temperature transducers in factory automation PLC modules. IC Role / Device Role / Timing Role: Primary analog rail regulator delivering low-noise 12 V at ≤100 mA with tight line/load regulation. Use Value: Maintains transducer accuracy by rejecting ripple from upstream 24 V buck converters and sustaining regulation down to 13.2 V input during brownout. |
Use Scenario: Tightening output voltage tolerance of a 12 V switching DC/DC converter used in motor drive control boards. IC Role / Device Role / Timing Role: Low-noise linear post-regulator that filters high-frequency switching noise and corrects ±10% converter tolerance. Use Value: Reduces output ripple from >50 mVpp to <150 µVrms while ensuring ±5% final 12 V rail accuracy across temperature and load. |
| Low-Power Analog Front-Ends | Legacy System Voltage Translation |
|
Use Scenario: Powering op-amps, ADC drivers, and reference buffers in portable test equipment with battery-backed 12 V rails. IC Role / Device Role / Timing Role: Compact, thermally efficient 12 V LDO supplying critical analog signal chain components. Use Value: Delivers 100 mA with 1.2 V dropout and 125°C junction rating - enabling reliable operation in sealed enclosures without forced airflow. |
Use Scenario: Replacing obsolete LM78L12 in legacy industrial controllers where PCB real estate is constrained. IC Role / Device Role / Timing Role: Pin-compatible drop-in alternative offering same 12 V output but in 60% smaller SOT-23 footprint. Use Value: Eliminates redesign effort while improving thermal margin and reducing system-level power dissipation by 30% at full load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM78L12ACZ/NOPB | TO-92 package, 2.5 V dropout, ±5% tolerance, 100 mA - larger footprint, higher dropout, no ON/OFF control. | Requires mechanical redesign; unsuitable for logic-controlled power gating or space-constrained layouts. | Select only if TO-92 mounting is mandatory and ON/OFF control is unnecessary. |
| TLV71212PDQNR | 12 V, 150 mA, 0.22 V typical dropout, 1.5 µA quiescent current, SOT-23-5 - lower dropout and IQ, but tighter 1% output tolerance. | Better suited for ultra-low-power or high-efficiency applications; may require output capacitor requalification. | Prefer when minimizing dropout or standby current is critical; verify stability with existing 0.1 µF ceramic cap. |
Compared with LM78L12ACZ/NOPB, LM3490IM5X-12/NOPB saves board area and enables active power management; compared with TLV71212PDQNR, it trades lower dropout for broader temperature tolerance and simpler qualification in cost-sensitive industrial designs.
Availability
LM3490IM5X-12/NOPB is available at Aetrix Electronics and suitable for industrial sensor biasing, post-regulation for DC/DC converters, and low-power analog front-ends requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM3490IM5X-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 company headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and high-reliability components for industrial, automotive, and communications markets.
The LM3490 product line delivers compact, thermally robust linear regulators targeting cost-sensitive industrial and legacy-replacement applications where simplicity, wide input range, and logic-enable capability are prioritized over ultra-low dropout or ultra-low IQ.
FAQ
What is the maximum input voltage for LM3490IM5X-12/NOPB?
The LM3490IM5X-12/NOPB supports a maximum input voltage of 30 V under operating conditions, with an absolute maximum rating of 35 V. Operation above 30 V risks exceeding safe power dissipation limits and is not guaranteed per specifications. Designers should maintain VIN ≤ 30 V for reliable performance across −40°C to +125°C.
Does LM3490IM5X-12/NOPB require an external pull-up resistor on the ON/OFF pin?
Yes - the ON/OFF pin of LM3490IM5X-12/NOPB has no internal pull-up or pull-down. It must be actively terminated to either GND (to disable) or a valid logic-high source (≥2.0 V, ≤5.0 V) to enable. Leaving it floating results in undefined output behavior. A 10 kΩ pull-up to 3.3 V or 5 V is commonly used for default-enable configurations.
What is the dropout voltage of LM3490IM5X-12/NOPB at 100 mA and 125°C?
The LM3490IM5X-12/NOPB specifies a maximum dropout voltage of 1.2 V at 100 mA load and +125°C junction temperature. At 25°C, typical dropout is 0.9 V. This quasi-LDO behavior allows the device to regulate from as low as 13.2 V input while delivering full 12 V output - significantly lower than the ~2.5 V dropout of LM78LXX devices.
Can LM3490IM5X-12/NOPB be used with a 0.1 µF ceramic output capacitor?
Yes - the LM3490IM5X-12/NOPB is explicitly characterized and stabilized with a 0.1 µF ceramic capacitor on the output, as confirmed in the TI datasheet's Typical Application Circuit and Electrical Characteristics tables. No ESR requirements or additional compensation components are needed, simplifying design and reducing BOM cost.
Is LM3490IM5X-12/NOPB pin-compatible with LM78L12ACZ/NOPB?
No - LM3490IM5X-12/NOPB uses a 5-pin SOT-23 (DBV) package with pins IN, GND, ON/OFF, OUT, and NC; LM78L12ACZ/NOPB uses a 3-pin TO-92 package with pins IN, GND, and OUT. They are functionally similar but not pin-compatible. Migration requires PCB layout revision, though the SOT-23 footprint offers superior thermal and space efficiency.
LM3490IM5X-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
LM3490IM5X-12/NOPB FAQ
1.How can I place an order for LM3490IM5X-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3490IM5X-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 LM3490IM5X-12/NOPB reliable?
The price and inventory of LM3490IM5X-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 LM3490IM5X-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM3490IM5X-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3490IM5X-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3490IM5X-12/NOPB?
LM3490IM5X-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3490IM5X-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 LM3490IM5X-12/NOPB?
For technical support, including LM3490IM5X-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3490IM5X-12/NOPB requirements.
6.How does Aetrix verify that LM3490IM5X-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3490IM5X-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 LM3490IM5X-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM3490IM5X-12/NOPB?
All LM3490IM5X-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3490IM5X-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 LM3490IM5X-12/NOPB part is unused and in its original packaging.
Return procedure for LM3490IM5X-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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