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Texas Instruments LM3490IM5-3.3/NOPB
- Part No.:
- LM3490IM5-3.3/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM3490IM5-3.3/NOPB.pdf
- Description:
- IC REG LINEAR 3.3V 100MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,624
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Product details
Overview
LM3490IM5-3.3/NOPB from Texas Instruments is a 3.3 V, 100 mA quasi-low-dropout linear voltage regulator in a 5-pin SOT-23 package, featuring logic-controlled ON/OFF 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 - used for biasing analog circuits and post-regulation after switching DC/DC converters.
For engineers reviewing the LM3490IM5-3.3/NOPB datasheet, LM3490IM5-3.3/NOPB pinout, LM3490IM5-3.3/NOPB application, or LM3490IM5-3.3/NOPB equivalent, key selection considerations include its 3.3 V fixed output, SOT-23 footprint compatibility with space-constrained designs, ON/OFF control interface thresholds (VIL = 0.2 V max, VIH = 2.0 V min), and thermal performance under 100 mA continuous load.
Technical Context
The LM3490IM5-3.3/NOPB integrates a PNP pass transistor with internal current limiting and thermal shutdown, enabling stable regulation without external compensation. Its quasi-LDO architecture delivers 3.3 V output with dropout as low as 0.7 V at 10 mA and 0.9 V at 100 mA across temperature.
Logic-level ON/OFF control operates over 0–5 V, with no internal pull-up/pull-down; the pin must be actively terminated. Ground pin current remains ≤4 mA at full load and drops to ≤5 µA in shutdown, supporting low-quiescent-power subsystem management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±5% (3.14–3.46 V) over full load and −40°C to +125°C - ensures reliable 3.3 V rail for microcontrollers and analog ICs. |
| Max Input Voltage | 30 V - supports direct regulation from unregulated 24 V industrial rails or automotive-derived supplies. |
| Dropout Voltage | 1.2 V max at 100 mA and full temperature range - enables operation with only 4.5 V input for 3.3 V output. |
| Load Current | 100 mA continuous - sufficient for powering small sensors, op-amps, or logic bias rails. |
| ON/OFF Thresholds | VIL ≤ 0.2 V, VIH ≥ 2.0 V - compatible with standard 3.3 V and 5 V logic families without level-shifting. |
| Output Noise | 100–150 µVRMS (10 Hz–100 kHz) - low enough for noise-sensitive analog front-ends and ADC reference supplies. |
| Junction Temp Range | −40°C to +125°C - qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
LM3490IM5-3.3/NOPB is housed in a 5-lead SOT-23 (DBV) package, measuring 2.9 mm × 1.6 mm × 1.1 mm, with gull-wing leads and RoHS-compliant CuSn finish (Level-1 MSL).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 4.5 V to 30 V; requires local 0.1 µF ceramic decoupling close to pin. |
| 2 (GND) | Ground reference | Common return for input, output, and ON/OFF logic; low-impedance PCB trace required. |
| 3 (ON/OFF) | Enable/disable control | Active-high logic input; must be pulled to GND (shutdown) or ≥2.0 V (enable); no internal bias. |
| 4 (OUT) | Regulated output | Delivers 3.3 V ±5% at up to 100 mA; requires 0.1 µF ceramic output capacitor for stability. |
| 5 (NC) | No connect | Internally unused; left floating per TI recommendation - no external connection required. |
Key Features
| Feature | Design Value |
|---|---|
| Quasi-LDO architecture | Enables 3.3 V output from as low as 4.5 V input while maintaining regulation at full 100 mA load. |
| Logic-controlled ON/OFF | Reduces ground current to ≤5 µA in shutdown, enabling precise power-gating of peripheral subsystems. |
| SOT-23-5 footprint | Replaces bulkier LM78L33 in space-constrained designs without layout redesign or thermal derating penalties. |
| ±5% output tolerance | Guaranteed over full temperature and load range - eliminates need for external trimming in cost-sensitive applications. |
| Thermal shutdown & current limit | Protects device during overload or ambient overheating; auto-recovery on cooldown without latch-up. |
Applications
| Industrial Sensor Biasing | Post-Regulation for Buck Converters |
|---|---|
Use Scenario: Powering precision analog sensor signal chains (e.g., RTD, strain gauge amplifiers) in factory automation PLC modules. IC Role / Device Role / Timing Role: Provides clean, stable 3.3 V bias for op-amps and ADC references downstream of noisy switching regulators. Use Value: 100–150 µVRMS output noise and ±5% tolerance ensure <1 LSB error in 12-bit ADC systems operating across −40°C to +85°C. |
Use Scenario: Final-stage regulation after a 5 V buck converter in embedded controllers requiring ultra-low EMI 3.3 V logic rails. IC Role / Device Role / Timing Role: Filters switching ripple and provides tight voltage accuracy for FPGA I/O banks and ARM core supplies. Use Value: 1.2 V dropout allows use of 5 V ±5% input (4.75–5.25 V), eliminating need for higher-input LDOs and simplifying BOM. |
| Low-Power IoT Node Subsystem | Automotive Body Control Module |
Use Scenario: Supplying 3.3 V to BLE/Wi-Fi SoCs and environmental sensors in battery-powered edge nodes. IC Role / Device Role / Timing Role: Enables software-controlled power cycling via ON/OFF pin to extend battery life between wake cycles. Use Value: Ground current drops to ≤5 µA in shutdown, reducing quiescent drain to <1 µA system-level when paired with low-leakage capacitors. |
Use Scenario: Generating 3.3 V for CAN transceiver logic and microcontroller peripherals in 12 V automotive body electronics. IC Role / Device Role / Timing Role: Regulates from vehicle battery (9–16 V nominal, up to 30 V transient) with robust thermal protection. Use Value: −40°C to +125°C junction rating and 30 V absolute max input meet AEC-Q100 stress requirements for under-hood placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73333PDBVR | True LDO (250 mV dropout @ 300 mA), lower IQ (60 µA), but rated only to 6 V input. | Better suited for low-input-voltage, high-efficiency portable designs; not viable for 24 V industrial inputs. | Select TLV73333PDBVR only if input stays ≤6 V and sub-100 µA quiescent current is critical. |
| TPS76333QDBVRQ1 | AEC-Q100 qualified, 100 mA, 30 V max input, but higher dropout (1.3 V @ 100 mA) and no ON/OFF pin. | Meets automotive qualification requirements but lacks logic enable - requires external MOSFET for power gating. | Choose TPS76333QDBVRQ1 when AEC-Q100 compliance is mandatory and ON/OFF control can be implemented externally. |
Compared with TLV73333PDBVR and TPS76333QDBVRQ1, the LM3490IM5-3.3/NOPB uniquely balances 30 V input capability, integrated ON/OFF control, and SOT-23 size - making it optimal for industrial subsystems needing wide-input regulation with active power management, where automotive qualification or ultra-low IQ are secondary concerns.
Availability
LM3490IM5-3.3/NOPB is available at Aetrix Electronics and suitable for industrial sensor biasing, post-regulation for switching DC/DC converters, and low-power IoT node subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM3490IM5-3.3/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, embedded processing, and power management technologies, with decades of leadership in linear regulator design and industrial-grade reliability.
The LM3490 product line was developed to deliver compact, rugged, and cost-effective quasi-LDO solutions for space- and thermal-constrained applications where legacy 78LXX regulators were too large or inefficient - especially in 3.3 V, 5 V, 12 V, and 15 V fixed-output configurations.
FAQ
What is the maximum input voltage rating for LM3490IM5-3.3/NOPB?
The LM3490IM5-3.3/NOPB has an absolute maximum input voltage of 35 V, but its specified operating maximum is 30 V. Operation beyond 30 V risks violating electrical characteristics and may trigger thermal shutdown or damage. For sustained reliability in industrial environments, keep VIN ≤30 V with appropriate derating for ambient temperature and power dissipation.
Does LM3490IM5-3.3/NOPB require an external output capacitor?
Yes, the LM3490IM5-3.3/NOPB requires a minimum 0.1 µF ceramic capacitor at the OUT pin for stability, as confirmed in the TI datasheet Figure 1 and Applications Information section. Omitting this capacitor causes oscillation and output voltage instability, especially under dynamic load conditions.
Can the NC pin (Pin 5) of LM3490IM5-3.3/NOPB be connected to ground or left floating?
Pin 5 is internally unconnected (NC) and must be left floating - TI explicitly states no external connection is required or recommended. Connecting it to ground or any other node may compromise thermal performance or cause unpredictable behavior due to internal package parasitics.
What is the typical ground pin current of LM3490IM5-3.3/NOPB at 100 mA load?
At 100 mA load and 25°C, the LM3490IM5-3.3/NOPB draws approximately 2 mA ground current (IGND), with a maximum of 4 mA over full temperature and load range. In shutdown (ON/OFF = 0 V), ground current drops to ≤5 µA, enabling ultra-low-power subsystem control.
Is LM3490IM5-3.3/NOPB RoHS compliant and lead-free?
Yes, LM3490IM5-3.3/NOPB is RoHS compliant and lead-free, with a "Green (RoHS & no Sb/Br)" eco plan, CU SN lead finish, and JEDEC Level-1 moisture sensitivity rating. The /NOPB suffix confirms TI's designation for lead-free, halogen-free packaging meeting current environmental standards.
LM3490IM5-3.3/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):
- 3.3V
- 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
LM3490IM5-3.3/NOPB FAQ
1.How can I place an order for LM3490IM5-3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3490IM5-3.3/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 LM3490IM5-3.3/NOPB reliable?
The price and inventory of LM3490IM5-3.3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3490IM5-3.3/NOPB is usually 5 days.
3.What payment methods are accepted for LM3490IM5-3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3490IM5-3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3490IM5-3.3/NOPB?
LM3490IM5-3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3490IM5-3.3/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 LM3490IM5-3.3/NOPB?
For technical support, including LM3490IM5-3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3490IM5-3.3/NOPB requirements.
6.How does Aetrix verify that LM3490IM5-3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3490IM5-3.3/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 LM3490IM5-3.3/NOPB meets industry standards.
7.What is the process for return or replacement of LM3490IM5-3.3/NOPB?
All LM3490IM5-3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3490IM5-3.3/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 LM3490IM5-3.3/NOPB part is unused and in its original packaging.
Return procedure for LM3490IM5-3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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