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Texas Instruments LP2992AIM5X-3.3
- Part No.:
- LP2992AIM5X-3.3
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP2992AIM5X-3.3.pdf
- Description:
- IC REG LINEAR 3.3V 250MA SOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LP2992AIM5X-3.3 from Texas Instruments is a fixed-output, micropower, ultra-low-dropout linear regulator in 5-pin SOT-23 (DBV) package, delivering up to 250mA output current with ±0.5% initial accuracy, 30µVRMS output noise (with 10nF bypass capacitor), and 70dB PSRR at 1kHz. It operates from 2.5V to 16V input and is designed for low-noise power supply to MCUs, RF front-ends, and precision analog circuits.
For engineers reviewing the LP2992AIM5X-3.3 datasheet, LP2992AIM5X-3.3 pinout, LP2992AIM5X-3.3 application, or LP2992AIM5X-3.3 equivalent, key selection criteria include dropout voltage at 250mA (225mV max over temperature), shutdown current (1.12µA typ), stability with 2.2µF ceramic output capacitors, and enable functionality via ON/OFF pin.
Technical Context
The LP2992AIM5X-3.3 uses a CMOS pass transistor architecture with internal bandgap reference and error amplifier, enabling ultra-low dropout and high PSRR. Its BYPASS pin connects to an external 10nF capacitor to reduce reference noise, directly lowering integrated output noise to 30µVRMS.
It integrates active-high enable (ON/OFF), thermal shutdown, current limiting, and internal output pulldown during disable. Soft-start minimizes inrush current, and operation over –40°C to +125°C junction temperature supports industrial and automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±0.5% (initial), ±1% over load and temperature - ensures stable core voltage for 3.3V microcontrollers and FPGAs. |
| Max Output Current | 250mA - sufficient for powering multiple low-power peripherals or a single mid-performance MCU. |
| Dropout Voltage | 225mV max at 250mA and TJ = 125°C - enables regulation from 3.525V input, critical for battery-powered systems near end-of-discharge. |
| Ground Pin Current | 875µA typ at 250mA load - low quiescent current preserves battery life in always-on sensor nodes. |
| PSRR | 70dB at 1kHz, 40dB at 1MHz - effectively suppresses switching noise from upstream DC/DC converters. |
| Output Noise | 30µVRMS (300Hz–50kHz, 10nF BYPASS) - meets stringent noise requirements of ADCs, PLLs, and RF synthesizers. |
| Input Voltage Range | 2.5V to 16V - supports wide-input industrial rails and unregulated 12V systems without pre-regulation. |
Pinout & Package
LP2992AIM5X-3.3 is housed in a 5-pin SOT-23 (DBV) package measuring 2.9mm × 2.8mm, with exposed pad not present (legacy DBV variant). Thermal resistance RθJA is 178.6°C/W on standard 2s2p JEDEC board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input supply connection | Accepts 2.5V–16V; requires ≥1µF ceramic input capacitor close to pin for stability and transient response. |
| OUT (Pin 5) | Regulated output | Delivers fixed 3.3V; stable with ≥2.2µF ceramic output capacitor (ESR ≤1Ω). |
| GND (Pin 2) | Power ground reference | Common return path for IN, OUT, BYPASS, and ON/OFF; must be low-impedance PCB plane. |
| ON/OFF (Pin 3) | Enable control input | Active-high logic: >0.85V enables regulator; <0.15V disables with internal pulldown - enables system-level power sequencing. |
| BYPASS (Pin 4) | Noise reduction node | Connects to 10nF capacitor to GND to filter reference voltage noise; essential for achieving 30µVRMS output noise. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30µVRMS output noise with 10nF BYPASS capacitor - enables clean power for RF transceivers and high-resolution ADCs. |
| Micropower operation | 69µA ground current at zero load - extends battery runtime in IoT edge sensors and wearables. |
| Wide-input compatibility | 2.5V to 16V input range - eliminates need for pre-regulators in 5V/12V industrial systems and automotive accessory rails. |
| Low-ESR capacitor support | Stable with 2.2µF ceramic output capacitor (ESR ≤1Ω) - reduces BOM cost and board area vs. tantalum alternatives. |
| Integrated protection | Thermal shutdown and current limiting - prevents damage during overload or ambient temperature excursions up to +125°C. |
Applications
| Washers and Dryers | Land Mobile Radios |
|---|---|
Use Scenario: Powering microcontroller, display driver, and motor control logic in appliance main control boards operating from 12V unregulated supply. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying digital core and interface circuitry with low noise and high PSRR to reject switching noise from motor drivers. Use Value: ±0.5% output accuracy ensures reliable MCU boot and operation across line/load/temperature; 250mA headroom supports burst-mode communication. | Use Scenario: Providing clean 3.3V bias to RF front-end ICs, baseband processors, and audio codecs in portable two-way radios. IC Role / Device Role / Timing Role: Low-noise post-regulator after buck converter, decoupling switching ripple before sensitive RF stages. Use Value: 30µVRMS noise and 70dB PSRR at 1kHz prevent reciprocal mixing and phase noise degradation in VHF/UHF receivers. |
| Active Antenna System mMIMO | Cordless Power Tools |
Use Scenario: Biasing beamforming ICs and low-noise amplifiers in compact 5G mMIMO antenna modules with tight thermal constraints. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering stable 3.3V to analog signal chain components adjacent to RF ICs. Use Value: 2.9mm × 2.8mm SOT-23 footprint minimizes PCB area; 125°C max junction temperature supports sealed, convection-limited enclosures. | Use Scenario: Supplying 3.3V to MCU, Bluetooth module, and battery fuel gauge in cordless drill/driver electronics powered by 18V Li-ion packs. IC Role / Device Role / Timing Role: High-PSRR LDO rejecting noise from motor commutation and battery protection ICs. Use Value: 16V absolute max input withstands load-dump transients; ON/OFF pin enables deep-sleep mode with 1.12µA shutdown current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSS721AIDR | Fixed 3.3V, 250mA, but higher dropout (350mV @ 250mA), no BYPASS pin, 65µVRMS noise | Lacks ultra-low-noise capability; unsuitable for RF or precision analog where 30µVRMS is required | Select only if noise and dropout are non-critical and BYPASS functionality is unnecessary |
| MCP1700T-3302E/MB | 3.3V, 250mA, 6µA IQ, but lower PSRR (55dB @ 1kHz), no enable pin, unstable below 4.7µF output capacitance | Optimized for ultra-low IQ, not low noise or high PSRR; lacks ON/OFF control for power sequencing | Prefer for battery-life-critical, low-transient applications without RF or precision analog loads |
Compared with TSS721AIDR and MCP1700T-3302E/MB, LP2992AIM5X-3.3 uniquely combines ultra-low noise (30µVRMS), high PSRR (70dB), and enable-controlled shutdown (1.12µA) in a space-constrained SOT-23 package - making it the only choice for noise-sensitive, power-sequenced, thermally demanding applications.
Availability
LP2992AIM5X-3.3 is available at Aetrix Electronics and suitable for washers and dryers, land mobile radios, active antenna systems, and cordless power tools requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for LP2992AIM5X-3.3 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 designing analog and embedded processing chips for industrial, automotive, and communications markets.
The LP2992 product line delivers micropower, low-noise, ultra-low-dropout regulators optimized for noise-sensitive applications including RF systems, precision instrumentation, and battery-powered portable electronics.
FAQ
What is the maximum input voltage rating for LP2992AIM5X-3.3?
The LP2992AIM5X-3.3 has an absolute maximum continuous input voltage of 18V. However, its recommended operating input voltage range is 2.5V to 16V. Exceeding 16V may trigger internal protection or degrade long-term reliability, so design margins should maintain VIN ≤16V under all conditions including transients.
Does LP2992AIM5X-3.3 require an external bypass capacitor?
Yes - LP2992AIM5X-3.3 requires a 10nF capacitor between the BYPASS pin and GND to achieve its specified 30µVRMS output noise. Without this capacitor, output noise increases significantly (up to 65µVRMS), compromising performance in RF and precision analog applications.
Can LP2992AIM5X-3.3 operate with a 1µF output capacitor?
No - LP2992AIM5X-3.3 requires a minimum 2.2µF ceramic output capacitor for stability. Using 1µF violates the recommended operating condition and risks oscillation or poor transient response. The datasheet explicitly states COUT ≥2.2µF for the new chip variant, which LP2992AIM5X-3.3 is.
What is the shutdown current of LP2992AIM5X-3.3 when disabled?
The shutdown current of LP2992AIM5X-3.3 is 1.12µA typical at TJ = 25°C and rises to 2.75µA maximum over –40°C to +125°C. This ultra-low disable current makes LP2992AIM5X-3.3 suitable for battery-backed systems requiring multi-year shelf life.
Is LP2992AIM5X-3.3 pin-compatible with other LP2992 variants?
Yes - LP2992AIM5X-3.3 shares identical pinout and footprint with all LP2992 SOT-23 (DBV) variants, including LP2992AIM5-3.3 and LP2992IM5-3.3. Differences are limited to grade (A-grade vs standard), packaging tape/reel, and minor electrical tolerances - not pin function or physical layout.
LP2992AIM5X-3.3 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):
- 16V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.85V @ 250mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 95 µA
- Current - Supply (Max):
- 4 mA
- PSRR:
- 45dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LP2992AIM5X-3.3 FAQ
1.How can I place an order for LP2992AIM5X-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2992AIM5X-3.3 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 LP2992AIM5X-3.3 reliable?
The price and inventory of LP2992AIM5X-3.3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2992AIM5X-3.3 is usually 5 days.
3.What payment methods are accepted for LP2992AIM5X-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2992AIM5X-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2992AIM5X-3.3?
LP2992AIM5X-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2992AIM5X-3.3 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 LP2992AIM5X-3.3?
For technical support, including LP2992AIM5X-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2992AIM5X-3.3 requirements.
6.How does Aetrix verify that LP2992AIM5X-3.3 is sourced from the original manufacturer or authorized distributors?
All LP2992AIM5X-3.3 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 LP2992AIM5X-3.3 meets industry standards.
7.What is the process for return or replacement of LP2992AIM5X-3.3?
All LP2992AIM5X-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LP2992AIM5X-3.3, 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 LP2992AIM5X-3.3 part is unused and in its original packaging.
Return procedure for LP2992AIM5X-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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