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Texas Instruments LP2992AIM5X-2.5
- Part No.:
- LP2992AIM5X-2.5
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP2992AIM5X-2.5.pdf
- Description:
- IC REG LINEAR 2.5V 250MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,335
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Product details
Overview
LP2992AIM5X-2.5 from Texas Instruments is a fixed-output, micropower, ultra-low-dropout linear regulator in SOT-23-5 (DBV) package, delivering 2.5 V at up to 250 mA with ±0.5% output accuracy (new chip), 30 µVRMS output noise (with 10 nF bypass capacitor), and 70 dB PSRR at 1 kHz. It serves as a post-regulator for noise-sensitive analog/RF circuitry in battery-powered industrial systems.
For engineers reviewing the LP2992AIM5X-2.5 datasheet, LP2992AIM5X-2.5 pinout, LP2992AIM5X-2.5 application, or LP2992AIM5X-2.5 equivalent, key selection criteria include dropout voltage at 250 mA (≤260 mV), ground current vs load (875 µA at full load), thermal shutdown behavior, stability with 2.2 µF ceramic output capacitors, and enable logic thresholds (0.72 V low, 0.85 V high).
Technical Context
The LP2992AIM5X-2.5 employs a CMOS pass transistor architecture with internal bandgap reference and error amplifier, enabling ultra-low dropout (225 mV typical at 250 mA, –40°C to +125°C) and micropower operation (69 µA quiescent current at zero load). Its BYPASS pin connects to an external 10 nF capacitor to reduce reference noise, directly enabling the 30 µVRMS output noise specification.
It integrates active-high ON/OFF control with internal pulldown on disable, overcurrent limiting (300–350 mA peak), and thermal shutdown. The regulator maintains ±1% total output accuracy across line, load, and temperature (–40°C to +125°C), meeting tight tolerance requirements for low-voltage MCUs and precision analog subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±0.5% (new chip), ensuring stable supply for 2.5 V logic and ADC references without external feedback. |
| Max Output Current | 250 mA continuous - sufficient to power multiple low-power peripherals or a single Cortex-M0+ MCU with sensors. |
| Dropout Voltage | 225 mV typ at 250 mA, –40°C to +125°C - enables regulation from 2.725 V input, critical for single-cell Li-ion or LiFePO4 systems. |
| Ground Current | 875 µA at 250 mA load - minimizes system standby power loss in always-on monitoring applications. |
| Output Noise | 30 µVRMS (300 Hz–50 kHz, 10 nF BYPASS cap) - suppresses switching noise from upstream DC/DC converters feeding RF front-ends. |
| PSRR | 70 dB at 1 kHz, 40 dB at 1 MHz - attenuates ripple from buck converters operating at 500 kHz–2 MHz switching frequencies. |
| Input Voltage Range | 2.5 V to 16 V - supports wide-input industrial rails including 3.3 V, 5 V, 12 V, and unregulated adapter inputs. |
Pinout & Package
LP2992AIM5X-2.5 is housed in a 5-pin SOT-23 (DBV) package measuring 2.9 mm × 2.8 mm, optimized for space-constrained PCB layouts and compatible with standard pick-and-place equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input supply connection | Accepts 2.5–16 V input; requires ≥1 µF ceramic capacitor to GND for stability and transient response. |
| OUT (Pin 5) | Regulated output | Delivers fixed 2.5 V; stable with ≥2.2 µF ceramic output capacitor (ESR ≤1 Ω). |
| GND (Pin 2) | Power ground reference | Common return path for IN, OUT, BYPASS, and ON/OFF; must be low-impedance copper pour. |
| ON/OFF (Pin 3) | Enable control input | Active-high logic: ≥0.85 V enables regulator; ≤0.72 V disables with internal pulldown to discharge OUT. |
| BYPASS (Pin 4) | Noise reduction node | Connects to 10 nF capacitor to GND to filter reference voltage noise, enabling 30 µVRMS output noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30 µVRMS output noise with 10 nF BYPASS cap - eliminates need for additional LC filtering in RF receiver chains. |
| Micropower quiescent operation | 69 µA IQ at zero load - extends battery life in wireless sensor nodes with long sleep intervals. |
| Wide-input, fixed-output LDO | 2.5 V ±0.5% output from 2.5–16 V input - simplifies BOM by removing external resistor dividers and trimming. |
| Thermal & current protection | Integrated thermal shutdown and current limit (300–350 mA) - prevents damage during short-circuit or overload events without external circuitry. |
| Stable with low-ESR ceramics | Supports 2.2 µF X7R/X5R MLCCs (ESR ≤1 Ω) - avoids costly tantalum or polymer capacitors and reduces board area. |
Applications
| Active Antenna mMIMO Systems | Industrial Motor Control Boards |
|---|---|
Use Scenario: Powering low-noise LNAs and phase shifters in 5G base station active antenna arrays where EMI from switching regulators must be suppressed. IC Role / Device Role / Timing Role: Post-regulator providing ultra-clean 2.5 V bias to RF front-end ICs downstream of a 5 V buck converter. Use Value: 30 µVRMS noise and 70 dB PSRR at 1 kHz prevent AM-to-PM distortion and maintain EVM < 2.5% in 256-QAM transmission. | Use Scenario: Supplying isolated gate drivers and position encoder interfaces on compact motor drive PCBs operating in harsh 40–85°C ambient environments. IC Role / Device Role / Timing Role: Local 2.5 V regulator for digital isolators and incremental encoder comparators requiring stable reference under load transients. Use Value: ±1% output accuracy over temperature ensures consistent threshold detection across –40°C to +125°C junction range, eliminating calibration drift. |
| Land Mobile Radios (LMR) | Cordless Power Tools |
Use Scenario: Delivering regulated 2.5 V to audio codec and microcontroller subsystems in portable two-way radios powered by 7.4 V Li-ion packs. IC Role / Device Role / Timing Role: Low-quiescent LDO enabling >100-hour standby time while supporting fast wake-up from deep sleep via ON/OFF pin control. Use Value: 69 µA IQ at zero load and 875 µA at 250 mA load minimize battery drain during voice-inactive periods without sacrificing response time. | Use Scenario: Powering Hall-effect current sensors and MCU peripherals in brushless cordless tool battery packs with dynamic 10–20 A load steps. IC Role / Device Role / Timing Role: Stable 2.5 V source for analog front-end signal conditioning during high-current motor commutation events. Use Value: 225 mV dropout at 250 mA allows regulation down to 2.725 V input - preserves runtime as Li-ion cells discharge from 4.2 V to 2.8 V per cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, micropower LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSS721AIDR | Fixed 2.5 V output, ±2% accuracy, 120 µVRMS noise, 150 mA max output, SOIC-8 package | Higher noise and lower current limit; suited for non-RF analog sensing only | Select when cost sensitivity outweighs noise performance and board space permits larger SOIC-8 footprint. |
| TPS7A2025PDQNR | Fixed 2.5 V, ±1% accuracy, 7 µVRMS noise, 300 mA output, 0.75 mm × 0.75 mm X2SON-4 package | Lower noise and higher current, but no BYPASS pin; requires different capacitor strategy | Choose for ultra-low-noise applications where 7 µVRMS is mandatory and layout allows X2SON-4 placement. |
Compared with TSS721AIDR and TPS7A2025PDQNR, LP2992AIM5X-2.5 delivers the optimal balance of ultra-low noise (30 µVRMS), micropower operation (69 µA IQ), and SOT-23-5 manufacturability - making it preferred for RF-adjacent and battery-critical designs where 250 mA capability and proven 2.2 µF ceramic stability are required.
Availability
LP2992AIM5X-2.5 is available at Aetrix Electronics and suitable for industrial motor control boards, active antenna mMIMO systems, land mobile radios, and cordless power tools requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LP2992AIM5X-2.5 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 LDO design heritage and automotive-grade reliability validation.
The LP2992 series was developed for noise-sensitive, battery-operated industrial and communications equipment requiring micropower efficiency, ultra-low dropout, and robust thermal/current protection - targeting applications where upstream DC/DC ripple must be aggressively filtered without adding discrete components.
FAQ
What is the maximum input voltage rating for LP2992AIM5X-2.5?
The absolute maximum continuous input voltage for LP2992AIM5X-2.5 is 18 V. However, the recommended operating range is 2.5 V to 16 V. Exceeding 16 V may degrade long-term reliability and is not supported under normal operation per TI's SNVS171L datasheet revision February 2025.
Does LP2992AIM5X-2.5 require an external bypass capacitor?
Yes, LP2992AIM5X-2.5 requires a 10 nF ceramic capacitor between the BYPASS pin and GND to achieve its specified 30 µVRMS output noise. Omitting this capacitor increases output noise to approximately 100 µVRMS, as confirmed in the Electrical Characteristics table and Figure 5-24 of the datasheet.
Can LP2992AIM5X-2.5 operate stably with a 1 µF output capacitor?
No - LP2992AIM5X-2.5 requires a minimum 2.2 µF ceramic output capacitor (X5R/X7R) for guaranteed stability across temperature and load. While the datasheet notes "nominal output capacitance must be greater than 1 µF", the validated minimum for stability under all conditions is 2.2 µF, as stated in Section 5.3 Recommended Operating Conditions.
What is the shutdown current of LP2992AIM5X-2.5 when disabled?
When the ON/OFF pin is driven low (<0.72 V), LP2992AIM5X-2.5 enters shutdown mode with a typical current draw of 1.12 µA at 25°C and 2.75 µA at –40°C to +125°C, as specified in Section 5.5 Electrical Characteristics under "Shutdown current (new chip)".
Is LP2992AIM5X-2.5 pin-compatible with other variants in the LP2992 family?
Yes - all LP2992 variants in the SOT-23-5 (DBV) package, including LP2992AIM5X-2.5, LP2992AIM5X-3.3, and LP2992AIM5X-5.0, share identical pinout, package dimensions (2.9 mm × 2.8 mm), and thermal characteristics. Only the output voltage and associated internal resistor divider differ between fixed-output versions.
LP2992AIM5X-2.5 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):
- 2.5V
- 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-2.5 FAQ
1.How can I place an order for LP2992AIM5X-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2992AIM5X-2.5 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-2.5 reliable?
The price and inventory of LP2992AIM5X-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2992AIM5X-2.5 is usually 5 days.
3.What payment methods are accepted for LP2992AIM5X-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2992AIM5X-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2992AIM5X-2.5?
LP2992AIM5X-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2992AIM5X-2.5 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-2.5?
For technical support, including LP2992AIM5X-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2992AIM5X-2.5 requirements.
6.How does Aetrix verify that LP2992AIM5X-2.5 is sourced from the original manufacturer or authorized distributors?
All LP2992AIM5X-2.5 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-2.5 meets industry standards.
7.What is the process for return or replacement of LP2992AIM5X-2.5?
All LP2992AIM5X-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LP2992AIM5X-2.5, 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-2.5 part is unused and in its original packaging.
Return procedure for LP2992AIM5X-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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