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Texas Instruments LP2992IM5X-1.5
- Part No.:
- LP2992IM5X-1.5
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP2992IM5X-1.5.pdf
- Description:
- IC REG LINEAR 1.5V 250MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,161
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Product details
Overview
LP2992IM5X-1.5 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% output accuracy (new chip), 30µVRMS output noise (with 10nF bypass capacitor), and 70dB PSRR at 1kHz. It operates across 2.5V–16V input range and is designed for low-noise power supply to MCUs, RF front-ends, and precision analog circuits in space-constrained industrial systems.
For engineers reviewing the LP2992IM5X-1.5 datasheet, LP2992IM5X-1.5 pinout, LP2992IM5X-1.5 application, or LP2992IM5X-1.5 equivalent, key selection criteria include dropout voltage at 250mA (225mV max over temperature), stability with 2.2µF ceramic output capacitors, shutdown current (1.12µA typ), and compatibility with very low-ESR capacitors - all critical for battery-powered and noise-sensitive embedded designs.
Technical Context
The LP2992IM5X-1.5 implements a CMOS-based LDO architecture with an internal bandgap reference (1.2V), adjustable feedback via external resistor divider (not applicable to fixed 1.5V variant), and active-high ON/OFF enable control. Its low-quiescent-current design (69µA at zero load) and soft-start circuitry minimize inrush current during power-up.
It features integrated thermal shutdown, current limiting (300–350mA peak), and output pulldown on disable. The BYPASS pin connects to a 10nF capacitor to reduce reference noise, directly enabling the 30µVRMS output noise specification - a key differentiator versus standard LDOs in RF and high-PSRR applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±0.5% (new chip) - ensures stable core voltage for low-voltage logic and I/O interfaces without external feedback components. |
| Max Output Current | 250mA - sufficient to power ARM Cortex-M microcontrollers, sensor signal chains, or RF bias rails in compact modules. |
| Dropout Voltage | 225mV max at 250mA and –40°C to +125°C - enables operation from single-cell Li-ion (3.0V min) or 3.3V rails with margin. |
| Ground Pin Current | 875µA typ at 250mA load - contributes <0.35% of total power loss at full load, supporting micropower system budgets. |
| Output Noise | 30µVRMS (300Hz–50kHz, 10nF BYPASS) - meets stringent noise requirements for ADC references and VCO power supplies. |
| PSRR | 70dB at 1kHz, 40dB at 1MHz - effectively suppresses switching noise from upstream DC/DC converters without additional filtering. |
| Input Voltage Range | 2.5V to 16V - supports wide-input industrial power rails, including 5V, 12V, and unregulated adapter inputs. |
Pinout & Package
LP2992IM5X-1.5 is housed in a 5-pin SOT-23 (DBV) package measuring 2.9mm × 2.8mm, with exposed pad not present (SOT-23-5 DBV, not WSON). Thermal performance is characterized by RθJA = 178.6°C/W (JEDEC 2s2p board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input supply connection | Accepts 2.5V–16V input; requires ≥1µF ceramic capacitor to GND for stability and transient response. |
| OUT (Pin 5) | Regulated output | Delivers fixed 1.5V; stable with ≥2.2µF ceramic output capacitor (ESR ≤1Ω); no electrolytic required. |
| GND (Pin 2) | Power ground reference | Common return path for IN, OUT, BYPASS, and ON/OFF; must be low-impedance for noise control. |
| BYPASS (Pin 4) | Noise reduction node | Connects to 10nF capacitor to GND to lower reference voltage noise - essential to achieve 30µVRMS spec. |
| ON/OFF (Pin 3) | Enable control input | Active-high logic: >0.85V enables regulator; <0.15V disables it and activates internal output pulldown. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30µVRMS output noise with 10nF BYPASS cap - enables clean power for RF synthesizers and precision ADCs. |
| Micropower quiescent operation | 69µA IQ at zero load - extends battery life in always-on sensor nodes and IoT endpoints. |
| Wide-input, low-ESR stability | Stable with 2.2µF ceramic output caps (no tantalum needed) - reduces BOM cost and improves reliability vs. electrolytics. |
| High PSRR across frequency | 70dB @ 1kHz and 40dB @ 1MHz - attenuates switching ripple from buck converters without LC filters. |
| Integrated protection | Thermal shutdown + current limit (300–350mA) - prevents damage during overload or short-circuit events. |
Applications
| Motor Control Power Rail | Low-Voltage MCU Core Supply |
|---|---|
Use Scenario: Powers gate drivers and position-sensing ADCs in cordless power tool motor control boards where EMI immunity and thermal headroom are critical. IC Role / Device Role / Timing Role: Provides clean, regulated 1.5V bias for analog front-end and logic-level translation circuits adjacent to high-current motor phases. Use Value: 30µVRMS noise and 70dB PSRR prevent switching noise coupling into current-sense amplifiers, improving torque control accuracy. | Use Scenario: Supplies core voltage to ultra-low-power ARM Cortex-M0+ microcontrollers in industrial washers/dryers operating across –40°C to +125°C ambient. IC Role / Device Role / Timing Role: Delivers tightly regulated 1.5V at up to 250mA with ±0.5% accuracy over temperature - maintaining CPU timing margins and flash programming integrity. Use Value: 225mV dropout at full load allows direct use from 3.3V rail with >1.8V headroom, eliminating need for intermediate regulators. |
| Active Antenna mMIMO Bias | Land Mobile Radio RF Subsystem |
Use Scenario: Powers low-noise amplifiers (LNAs) and phase shifters in active antenna arrays for 5G mMIMO base stations requiring minimal phase noise degradation. IC Role / Device Role / Timing Role: Acts as local point-of-load regulator for 1.5V RF ICs, decoupled via BYPASS pin to suppress broadband noise. Use Value: 30µVRMS noise and 1Ω max ESR support ensure VCO phase noise remains below –110dBc/Hz at 100kHz offset. | Use Scenario: Supplies bias voltage to IF filters and mixer stages in ruggedized land mobile radios deployed in vehicles and field equipment. IC Role / Device Role / Timing Role: Regulates 1.5V for analog signal chain components subject to automotive-grade temperature cycling and load transients. Use Value: 178.6°C/W RθJA and –40°C to +125°C operation ensure reliable function under sustained 250mA loads in sealed enclosures. |
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 1.5V output, ±2% accuracy, 200mA max, higher IQ (120µA), no BYPASS pin, 65dB PSRR @ 1kHz | Lacks low-noise BYPASS functionality; unsuitable for RF/analog-sensitive designs requiring <50µVRMS | Select only if noise sensitivity is low and cost is primary constraint; verify thermal derating at 250mA. |
| TPS7A2015PDBVR | Fixed 1.5V, ±1% accuracy, 300mA, 6.5µA IQ, 70dB PSRR @ 1kHz, but requires ≥1µF COUT and no BYPASS pin | No dedicated noise-reduction pin; achieves 12µVRMS via internal architecture - not configurable like LP2992's BYPASS | Prefer when ultra-low IQ dominates design priority and noise is managed via layout; not drop-in due to different pinout and no BYPASS. |
Compared with TSS721AIDR and TPS7A2015PDBVR, LP2992IM5X-1.5 uniquely combines 30µVRMS noise (via user-configurable BYPASS), ±0.5% accuracy, and proven 250mA capability in SOT-23 - making it the only option among the three qualified for noise-critical RF biasing where external capacitor tuning is required.
Availability
LP2992IM5X-1.5 is available at Aetrix Electronics and suitable for motor control boards, industrial washers/dryers, active antenna mMIMO systems, and land mobile radio subsystems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LP2992IM5X-1.5 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs, precision analog, and high-reliability industrial solutions.
The LP2992 product line delivers micropower, low-noise, ultra-low-dropout regulators optimized for noise-sensitive applications in industrial automation, communications infrastructure, and portable instrumentation - emphasizing accuracy, stability, and thermal robustness.
FAQ
What is the output voltage tolerance of LP2992IM5X-1.5 over temperature and load?
The LP2992IM5X-1.5 has a guaranteed output voltage tolerance of ±0.5% at room temperature and ±1% across –40°C to +125°C junction temperature and 1mA–250mA load range. This is specified for the "new chip" revision and reflects tighter regulation than legacy LP2992 variants.
Can LP2992IM5X-1.5 operate with a 2.2µF ceramic output capacitor?
Yes, LP2992IM5X-1.5 is explicitly characterized and stable with a 2.2µF ceramic output capacitor (X5R/X7R, 10% tolerance, 50% derating). No series ESR is required, and the device supports output capacitors with ESR up to 1Ω - eliminating need for tantalum or polymer types.
What is the purpose of the BYPASS pin on LP2992IM5X-1.5?
The BYPASS pin on LP2992IM5X-1.5 connects to a 10nF capacitor to ground to filter the internal reference voltage. This configuration reduces output noise to 30µVRMS (300Hz–50kHz); omitting the BYPASS capacitor degrades noise performance to ~100µVRMS, per TI characterization data.
Does LP2992IM5X-1.5 include thermal protection?
Yes, LP2992IM5X-1.5 integrates thermal shutdown protection that disables the output when junction temperature exceeds approximately +150°C. Recovery occurs automatically once temperature falls below the hysteresis threshold (~140°C), and the device resumes regulation without external intervention.
What is the maximum input voltage rating for LP2992IM5X-1.5?
The absolute maximum continuous input voltage for LP2992IM5X-1.5 is 18V, while the recommended operating range is 2.5V to 16V. Operation above 16V is permissible only for transient conditions (e.g., load dump), and sustained operation beyond 16V may impact long-term reliability and parametric performance.
LP2992IM5X-1.5 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):
- 1.5V
- 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
LP2992IM5X-1.5 FAQ
1.How can I place an order for LP2992IM5X-1.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2992IM5X-1.5 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 LP2992IM5X-1.5 reliable?
The price and inventory of LP2992IM5X-1.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2992IM5X-1.5 is usually 5 days.
3.What payment methods are accepted for LP2992IM5X-1.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2992IM5X-1.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2992IM5X-1.5?
LP2992IM5X-1.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2992IM5X-1.5 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 LP2992IM5X-1.5?
For technical support, including LP2992IM5X-1.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2992IM5X-1.5 requirements.
6.How does Aetrix verify that LP2992IM5X-1.5 is sourced from the original manufacturer or authorized distributors?
All LP2992IM5X-1.5 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 LP2992IM5X-1.5 meets industry standards.
7.What is the process for return or replacement of LP2992IM5X-1.5?
All LP2992IM5X-1.5 units undergo pre-shipment inspection (PSI). If there is an issue with LP2992IM5X-1.5, 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 LP2992IM5X-1.5 part is unused and in its original packaging.
Return procedure for LP2992IM5X-1.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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