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Texas Instruments LP2992AILD-1.5/NOPB
- Part No.:
- LP2992AILD-1.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LP2992AILD-1.5/NOPB.pdf
- Description:
- IC REG LINEAR 1.5V 250MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:793
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Product details
Overview
LP2992AILD-1.5/NOPB 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 powers low-voltage microcontrollers in battery-operated industrial control systems where stable, low-noise biasing is critical.
For engineers reviewing the LP2992AILD-1.5/NOPB datasheet, LP2992AILD-1.5/NOPB pinout, LP2992AILD-1.5/NOPB application, or LP2992AILD-1.5/NOPB equivalent, key selection criteria include dropout voltage at 250mA (225–260mV), shutdown current (1.12μA typ), stability with 2.2µF ceramic output capacitors, and enable logic thresholds (0.72V low / 0.85V high).
Technical Context
The LP2992AILD-1.5/NOPB employs a CMOS pass transistor architecture with internal bandgap reference and soft-start circuitry, enabling controlled inrush current and fast load transient response. Its BYPASS pin connects to an external 10nF capacitor to reduce reference noise, directly contributing to the 30μVRMS output noise specification.
It integrates overcurrent protection, thermal shutdown, and active pull-down on disable - all operating across –40°C to +125°C junction temperature. The ON/OFF pin is active-high with defined VIH/VIL thresholds (0.85V/0.72V), and the device maintains regulation down to VIN = VOUT + 235mV at full load and temperature extremes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±0.5% (new chip), ensuring tight regulation for 1.5V-core MCUs without external feedback. |
| Max Output Current | 250mA continuous - sufficient to power ARM Cortex-M0+ cores with peripherals under peak load. |
| Dropout Voltage | 225mV (typ) at 250mA and TJ = 25°C; rises to 340mV at –40°C to +125°C - enables operation from single-cell Li-ion (3.0V min) into 1.5V rail. |
| Ground Pin Current | 875μA (typ) at 250mA load - enables accurate efficiency calculation and thermal modeling in compact PCB layouts. |
| PSRR | 70dB at 1kHz, 40dB at 1MHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Output Noise | 30μVRMS (300Hz–50kHz, 10nF BYPASS) - meets stringent analog sensor and RF front-end supply requirements. |
| Operating Temp | –40°C to +125°C junction - qualified for industrial motor drives and outdoor telecom equipment. |
Pinout & Package
LP2992AILD-1.5/NOPB uses the 5-pin SOT-23 (DBV) package: 2.9mm × 2.8mm body, gull-wing leads, RoHS-compliant, moisture sensitivity level 1.
| 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 EMI suppression. |
| OUT (Pin 5) | Regulated output | Delivers fixed 1.5V; stable with ≥2.2µF ceramic output capacitor - no tantalum or electrolytic required. |
| GND (Pin 2) | Power ground reference | Common return path for IN, OUT, BYPASS, and ON/OFF; must be low-impedance copper pour for noise control. |
| ON/OFF (Pin 3) | Enable control input | Active-high logic: ≥0.85V enables regulator; ≤0.72V disables it and activates internal output pulldown. |
| BYPASS (Pin 4) | Noise reduction node | Connects to 10nF capacitor to GND to lower reference noise - essential to achieve 30μVRMS output noise spec. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower quiescent current | 69μA at zero load - extends battery life in always-on IoT sensors and remote monitoring nodes. |
| Ultra-low-noise regulation | 30μVRMS output noise with 10nF BYPASS cap - eliminates need for post-LDO LC filtering in precision ADC or PLL supplies. |
| Wide-input compatibility | 2.5V–16V input range - supports direct connection to 12V industrial rails or multi-cell battery stacks without pre-regulation. |
| Thermal & current protection | Integrated overtemperature shutdown and foldback current limiting - prevents damage during sustained overload or poor heatsinking. |
| Soft-start behavior | Internal ramp limits inrush current - reduces stress on input capacitors and avoids brownout in shared power domains. |
Applications
| Industrial Motor Drives | Portable Test Equipment |
|---|---|
Use Scenario: Powers FPGA configuration memory and I/O banks in compact servo drive controllers exposed to vibration and wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary 1.5V bias rail for low-power logic; provides clean, regulated supply independent of noisy motor PWM switching. Use Value: 70dB PSRR at 1kHz attenuates 10kHz–100kHz motor gate-driver noise, preventing logic glitches and configuration corruption. |
Use Scenario: Supplies 1.5V core voltage to mixed-signal SoCs in handheld multimeters and oscilloscope probes. IC Role / Device Role / Timing Role: Low-noise post-regulator after buck converter; ensures stable ADC reference and clock domain integrity. Use Value: 30μVRMS noise enables <12-bit ENOB in 16-bit SAR ADCs without additional filtering components. |
| Active Antenna mMIMO Systems | Cordless Power Tools |
Use Scenario: Provides bias to RF front-end ICs and beamforming ASICs in 5G base station active antenna units deployed outdoors. IC Role / Device Role / Timing Role: Local point-of-load regulator for 1.5V digital control blocks; operates across –40°C to +125°C ambient. Use Value: ±0.5% output accuracy over temperature ensures consistent digital biasing and mitigates gain drift in calibration-sensitive RF paths. |
Use Scenario: Powers MCU and motor controller logic in brushless cordless drills and impact drivers subjected to mechanical shock and intermittent high-current loads. IC Role / Device Role / Timing Role: Enable-controlled 1.5V supply that shuts down during idle to conserve battery; resumes instantly on trigger pull. Use Value: 1.12μA shutdown current extends shelf life and standby time; 250mA capability handles burst-mode communication and sensor polling. |
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, 150mA max, 120mV dropout at 150mA, no BYPASS pin. | Lacks low-noise capability (no bypass option); limited current for MCU+peripherals. | Choose only if cost is primary constraint and noise/PSRR requirements are relaxed. |
| TPS7A0515PDBVR | Fixed 1.5V, ±1% accuracy, 200mA, 175mV dropout at 200mA, 25μA IQ, no BYPASS pin. | Lower IQ but higher noise (65μVRMS); not specified for >125°C operation. | Prefer for battery longevity in consumer tools; avoid in industrial/mMIMO where 125°C rating and 30μVRMS are mandatory. |
Compared with TSS721AIDR and TPS7A0515PDBVR, LP2992AILD-1.5/NOPB uniquely delivers 1.5V regulation with ±0.5% accuracy, 30μVRMS noise, and full –40°C to +125°C qualification - making it the only choice for high-reliability, noise-sensitive industrial and telecom applications requiring guaranteed performance at temperature extremes.
Availability
LP2992AILD-1.5/NOPB is available at Aetrix Electronics and suitable for industrial motor drives, active antenna mMIMO systems, portable test equipment, and cordless power tools requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LP2992AILD-1.5/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 leader specializing in analog and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The LP2992 belongs to TI's micropower LDO family engineered for ultra-low-noise, high-PSRR regulation in space-constrained, thermally demanding applications - particularly where battery life, signal integrity, and extended temperature operation are critical.
FAQ
What is the minimum input voltage required for LP2992AILD-1.5/NOPB to maintain regulation at full 250mA load and 125°C?
The LP2992AILD-1.5/NOPB requires a minimum input voltage of 1.84V (1.5V + 340mV dropout) to maintain regulation at 250mA and +125°C. This value is derived from the maximum dropout voltage specification (340mV) under those conditions - confirming suitability for single-cell Li-ion (3.0V nominal) and 3.3V system rails with margin.
Does LP2992AILD-1.5/NOPB require an external bypass capacitor, and what happens if it is omitted?
Yes - LP2992AILD-1.5/NOPB requires a 10nF capacitor between the BYPASS pin and GND to achieve its specified 30μVRMS output noise. Omitting it increases output noise to ~65μVRMS (as seen in comparable TI LDOs without bypass), degrading ADC SNR and PLL phase noise in sensitive signal chains.
Can LP2992AILD-1.5/NOPB be used with a 1µF output capacitor instead of the recommended 2.2µF?
No - the LP2992AILD-1.5/NOPB is only guaranteed stable with ≥2.2µF ceramic output capacitance. Using 1µF violates the minimum COUT requirement and risks oscillation, especially under dynamic load conditions, as confirmed by TI's stability testing and application notes.
What is the shutdown current of LP2992AILD-1.5/NOPB, and how is it measured?
The LP2992AILD-1.5/NOPB has a typical shutdown current of 1.12μA when the ON/OFF pin is driven below 0.15V and VIN = 16V at –40°C to +125°C. This value is measured per TI's Electrical Characteristics table (Section 5.5) and reflects total device leakage in disabled state - critical for battery-powered systems with long sleep intervals.
Is LP2992AILD-1.5/NOPB pin-compatible with earlier LP2992 variants in SOT-23 packages?
Yes - LP2992AILD-1.5/NOPB uses the same 5-pin SOT-23 (DBV) footprint and pinout as legacy LP2992 devices, including identical IN, OUT, GND, ON/OFF, and BYPASS assignments. No PCB layout changes are needed when upgrading from standard-grade or A-grade versions to this new-chip variant.
LP2992AILD-1.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 6-WSON (2.92x3.29)
LP2992AILD-1.5/NOPB FAQ
1.How can I place an order for LP2992AILD-1.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2992AILD-1.5/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 LP2992AILD-1.5/NOPB reliable?
The price and inventory of LP2992AILD-1.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2992AILD-1.5/NOPB is usually 5 days.
3.What payment methods are accepted for LP2992AILD-1.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2992AILD-1.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2992AILD-1.5/NOPB?
LP2992AILD-1.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2992AILD-1.5/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 LP2992AILD-1.5/NOPB?
For technical support, including LP2992AILD-1.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2992AILD-1.5/NOPB requirements.
6.How does Aetrix verify that LP2992AILD-1.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LP2992AILD-1.5/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 LP2992AILD-1.5/NOPB meets industry standards.
7.What is the process for return or replacement of LP2992AILD-1.5/NOPB?
All LP2992AILD-1.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2992AILD-1.5/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 LP2992AILD-1.5/NOPB part is unused and in its original packaging.
Return procedure for LP2992AILD-1.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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