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Texas Instruments LP2992ILDX-2.5
- Part No.:
- LP2992ILDX-2.5
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LP2992ILDX-2.5.pdf
- Description:
- IC REG LINEAR 2.5V 250MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,727
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Product details
Overview
LP2992ILDX-2.5 from Texas Instruments is a fixed-output, micropower, ultra-low-dropout linear regulator in 5-pin SOT-23 (DBV) package, delivering up to 250mA with ±0.5% output accuracy, 30µVRMS noise (with 10nF bypass), and 70dB PSRR at 1kHz. It operates from 2.5V to 16V input and targets low-noise power for MCUs and RF subsystems in portable industrial equipment.
For engineers reviewing the LP2992ILDX-2.5 datasheet, LP2992ILDX-2.5 pinout, LP2992ILDX-2.5 application, or LP2992ILDX-2.5 equivalent, key selection criteria include dropout voltage at 250mA (225–260mV), shutdown current (1.12µA typ), stability with 2.2µF ceramic output capacitors, and BYPASS pin noise-reduction capability.
Technical Context
The LP2992ILDX-2.5 uses a CMOS pass transistor architecture with internal bandgap reference and soft-start circuitry to limit inrush current. Its enable-controlled ON/OFF pin supports active-high logic with 0.85V low-to-high threshold and 1.6V high-to-low threshold across –40°C to +125°C.
It achieves ultra-low noise via dedicated BYPASS pin connected to a 10nF capacitor that filters the internal reference, reducing output noise to 30µVRMS (300Hz–50kHz). PSRR exceeds 70dB at 1kHz and remains at 40dB at 1MHz, enabling effective attenuation of upstream DC/DC switching ripple.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT | Fixed 2.5V output; ensures stable core voltage for 2.5V I/O or analog subsystems without external feedback. |
| VIN Range | 2.5V to 16V; supports wide-input battery or intermediate rail operation, including single-cell Li-ion (3.0–4.2V) and 12V industrial rails. |
| Dropout Voltage | 225mV (typ) at 250mA, 25°C; enables regulation down to VIN = 2.725V - critical for battery end-of-life operation. |
| Output Accuracy | ±0.5% (new chip); guarantees tight voltage tolerance across load (0–250mA) and temperature (–40°C to +125°C) for precision analog/MCU supply. |
| IQ | 69µA (typ) at zero load; minimizes quiescent drain in always-on systems such as sensor wake-up circuits. |
| Noise | 30µVRMS (300Hz–50kHz, 10nF BYPASS); meets low-noise requirements for ADC references, RF LNA bias, or PLL VCO supplies. |
| PSRR | 70dB @ 1kHz, 40dB @ 1MHz; suppresses switching noise from buck converters without requiring bulky post-filtering. |
| Stability | Stable with ≥2.2µF ceramic output capacitor (ESR ≤1Ω); eliminates need for tantalum or electrolytic caps, improving reliability and board space. |
Pinout & Package
LP2992ILDX-2.5 is housed in a 5-pin SOT-23 (DBV) package measuring 2.9mm × 2.8mm, with exposed pad not present (DBV variant). Thermal resistance RθJA = 178.6°C/W on standard 2s2p JEDEC board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input supply connection | Accepts 2.5–16V input; requires ≥1µF ceramic decoupling to GND for stability and transient response. |
| OUT (Pin 5) | Regulated output | Delivers fixed 2.5V at up to 250mA; connects to ≥2.2µF ceramic capacitor for loop stability and ESR control. |
| GND (Pin 2) | Power ground reference | Common return path for IN, OUT, BYPASS, and ON/OFF; must be low-impedance and thermally coupled to PCB copper. |
| ON/OFF (Pin 3) | Enable control input | Active-high logic: >0.85V enables regulator; <0.15V disables it and activates internal pulldown to discharge OUT. |
| BYPASS (Pin 4) | Noise reduction node | Connects to 10nF capacitor to GND to filter internal reference; reduces output noise to 30µVRMS. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30µVRMS output noise with 10nF BYPASS cap - enables clean power for RF front-ends and precision ADCs. |
| High PSRR across frequency | 70dB @ 1kHz and 40dB @ 1MHz - effectively isolates sensitive loads from switching converter ripple. |
| Micropower operation | 69µA quiescent current at zero load - extends battery life in always-on IoT sensors and wearables. |
| Robust thermal protection | Integrated thermal shutdown and current limiting - prevents damage during overload or poor heatsinking. |
| Soft-start functionality | Internal soft-start limits inrush current during turn-on - reduces stress on input capacitors and avoids system brownouts. |
| Wide operating temperature | –40°C to +125°C junction range - qualified for under-hood automotive modules and industrial motor drives. |
Applications
| Motor Drive Power Supply | Portable RF Transceiver Bias |
|---|---|
Use Scenario: Powers gate drivers and isolated logic in cordless power tool motor controllers where input rail varies from 10V–18V during battery discharge. IC Role / Device Role / Timing Role: Low-dropout regulator supplying stable 2.5V to MCU I/O and gate driver level-shifters. Use Value: 225mV dropout at 250mA ensures regulation until battery reaches ~2.73V, extending usable runtime by >12% vs. higher-VDO alternatives. | Use Scenario: Supplies clean bias to LNA and mixer stages in land mobile radio transceivers operating in noisy RF environments. IC Role / Device Role / Timing Role: Ultra-low-noise 2.5V source referenced to BYPASS capacitor for RF signal chain integrity. Use Value: 30µVRMS noise and 70dB PSRR prevent AM/PM distortion and maintain EVM performance below 3% at 900MHz. |
| Industrial Sensor Node Core Supply | mMIMO Active Antenna Bias |
Use Scenario: Powers 32-bit ARM Cortex-M microcontroller and 16-bit SAR ADC in predictive maintenance vibration sensors deployed in washers/dryers. IC Role / Device Role / Timing Role: Precision 2.5V reference-grade supply ensuring ADC full-scale accuracy and MCU clock stability. Use Value: ±0.5% output accuracy over –40°C to +125°C eliminates calibration drift across ambient temperature swings. | Use Scenario: Provides per-element bias to GaAs pHEMT amplifiers in 64-element mMIMO base station antenna arrays. IC Role / Device Role / Timing Role: Compact, thermally robust LDO delivering 2.5V to distributed amplifier stages with minimal board area. Use Value: SOT-23-5 footprint and 178.6°C/W RθJA allow direct mounting on FR4 without thermal vias, simplifying multilayer PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL7407LPGP | 7-channel 250mA sink driver with integrated LDO; no BYPASS pin; 40µVRMS noise; 50dB PSRR @ 1kHz. | Designed for LED/motor sink control, not standalone low-noise bias; lacks independent enable and noise optimization. | Select only if driving multiple loads with common enable and noise spec is secondary. |
| MCP1826T-2502E/DB | 250mA LDO in SOT-23; ±2% accuracy; 45µVRMS noise; no BYPASS pin; 60dB PSRR @ 1kHz. | Higher noise and lower PSRR limit use in RF/analog-sensitive designs; wider accuracy reduces margin for 2.5V-tolerant ICs. | Consider for cost-sensitive non-RF applications where ±2% tolerance is acceptable and BYPASS filtering is unnecessary. |
Compared with TPL7407LPGP and MCP1826T-2502E/DB, LP2992ILDX-2.5 uniquely delivers ±0.5% accuracy, 30µVRMS noise via BYPASS, and 70dB PSRR - making it the only option qualified for precision RF bias and high-resolution ADC reference supply in compact SOT-23 form.
Availability
LP2992ILDX-2.5 is available at Aetrix Electronics and suitable for motor drives, portable radios, industrial sensors, and mMIMO antenna systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LP2992ILDX-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 expertise and broad industrial qualification.
The LP2992 product line was engineered for ultra-low-noise, micropower regulation in battery-powered and RF-critical systems - emphasizing dropout efficiency, PSRR performance, and compatibility with small ceramic capacitors.
FAQ
What is the maximum output current supported by the LP2992ILDX-2.5?
The LP2992ILDX-2.5 supports up to 250mA of continuous output current under recommended operating conditions (TJ ≤ 125°C, VIN ≥ VOUT + 1V). Peak output current is rated at 300–350mA, and short-circuit current is 375mA (new chip), with internal current limiting and thermal shutdown protecting against sustained overload.
Does the LP2992ILDX-2.5 require an external bypass capacitor, and why?
Yes - the LP2992ILDX-2.5 requires a 10nF capacitor between the BYPASS pin and GND to achieve its specified 30µVRMS output noise. This capacitor filters the internal bandgap reference voltage; omitting it increases noise to ~45µVRMS. The BYPASS pin is not optional for low-noise operation and must be routed with minimal parasitic inductance.
Can the LP2992ILDX-2.5 operate with a 2.2µF ceramic output capacitor?
Yes - the LP2992ILDX-2.5 is explicitly designed to be stable with ≥2.2µF ceramic output capacitors having ESR ≤1Ω. Unlike older LDOs requiring tantalum or electrolytic caps, this enables smaller, more reliable, and temperature-stable designs without compromising phase margin or transient response.
What is the shutdown current consumption of the LP2992ILDX-2.5?
The LP2992ILDX-2.5 draws 1.12µA (typical) shutdown current when the ON/OFF pin is driven low (<0.15V) at VIN = 16V and TJ = 25°C. At –40°C to +125°C, shutdown current remains ≤2.75µA, making it suitable for energy-harvesting and battery-backed systems requiring nanoamp-level standby leakage.
How does the LP2992ILDX-2.5 handle line and load transients?
The LP2992ILDX-2.5 features internal soft-start and optimized control-loop compensation, delivering fast transient response: typical output deviation is <±40mV for 150mA load steps (dI/dt = 1A/µs) and <±15mV for 1V input steps (dV/dt = 1V/µs), both with 10nF BYPASS. This ensures stable MCU core voltage during burst-mode operation.
LP2992ILDX-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 6-WSON (2.92x3.29)
LP2992ILDX-2.5 FAQ
1.How can I place an order for LP2992ILDX-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2992ILDX-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 LP2992ILDX-2.5 reliable?
The price and inventory of LP2992ILDX-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 LP2992ILDX-2.5 is usually 5 days.
3.What payment methods are accepted for LP2992ILDX-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2992ILDX-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2992ILDX-2.5?
LP2992ILDX-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2992ILDX-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 LP2992ILDX-2.5?
For technical support, including LP2992ILDX-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2992ILDX-2.5 requirements.
6.How does Aetrix verify that LP2992ILDX-2.5 is sourced from the original manufacturer or authorized distributors?
All LP2992ILDX-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 LP2992ILDX-2.5 meets industry standards.
7.What is the process for return or replacement of LP2992ILDX-2.5?
All LP2992ILDX-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LP2992ILDX-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 LP2992ILDX-2.5 part is unused and in its original packaging.
Return procedure for LP2992ILDX-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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