Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Texas Instruments LP2992AILDX-3.3

Name: LP2992AILDX-3.3
Brand: Texas Instruments
SKU: LP2992AILDX-3.3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: LP2992AILDX-3.3

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 6-WDFN Exposed Pad

Datasheet:: LP2992AILDX-3.3.pdf

Description:: IC REG LINEAR 3.3V 250MA 6WSON

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,551

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

LP2992AILDX-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 with ±0.5% output accuracy (new chip), 30µVRMS output noise (with 10nF bypass capacitor), and 70dB PSRR at 1kHz. It serves as a post-regulator for noise-sensitive analog/RF subsystems in battery-powered industrial and wireless equipment.

For engineers reviewing the LP2992AILDX-3.3 datasheet, LP2992AILDX-3.3 pinout, LP2992AILDX-3.3 application, or LP2992AILDX-3.3 equivalent, key selection criteria include dropout voltage at 250mA (225–260mV), shutdown current (1.12µA typ), stability with 2.2µF ceramic output capacitors, and operation across –40°C to +125°C junction temperature.

Technical Context

The LP2992AILDX-3.3 uses a CMOS pass transistor architecture with internal bandgap reference and error amplifier, enabling ultra-low dropout and low quiescent current. Its BYPASS pin connects to an external 10nF capacitor to reduce reference noise, directly lowering integrated output noise to 30µVRMS over 300Hz–50kHz.

It integrates active-high enable (ON/OFF), thermal shutdown, and foldback current limiting. The soft-start circuit minimizes inrush current during turn-on, reducing required input capacitance. PSRR exceeds 40dB at 1MHz due to high-gain error amplifier and optimized internal compensation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_OUT	Fixed 3.3V output - eliminates external feedback resistors and simplifies layout for stable 3.3V rail generation.
V_IN Range	2.5V to 16V - supports wide-input applications including single-cell Li-ion (3.0–4.2V) and 12V industrial rails.
Output Accuracy	±0.5% (new chip, 1mA–250mA, –40°C to +125°C) - meets tight tolerance requirements of low-voltage MCUs and ADC references.
I_Q @ I_LOAD = 0mA	69µA typ - enables multi-year battery life in always-on sensor nodes and IoT endpoints.
Dropout Voltage	225mV max at 250mA, +125°C - ensures regulation down to VIN = 3.525V, critical for brownout resilience in portable systems.
PSRR	70dB at 1kHz, 40dB at 1MHz - suppresses switching noise from upstream DC/DC converters without additional LC filtering.
Output Noise	30µV_RMS (300Hz–50kHz, 10nF BYPASS) - suitable for powering RF transceivers, PLLs, and precision analog front-ends.
C_OUT Requirement	Stable with ≥2.2µF ceramic capacitor - eliminates need for bulky tantalum or electrolytic caps, reducing board area and cost.

Pinout & Package

LP2992AILDX-3.3 is packaged in a 5-pin SOT-23 (DBV) case measuring 2.9mm × 2.8mm, with exposed pad not present (legacy DBV variant). Pin 1 is IN, Pin 2 is GND, Pin 3 is ON/OFF, Pin 4 is BYPASS, Pin 5 is OUT.

Pin/Terminal	Circuit Role	Design Meaning
IN (Pin 1)	Input supply connection	Accepts 2.5–16V; requires ≥1µF ceramic capacitor to GND for stability and transient response.
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 it with active output pulldown.
BYPASS (Pin 4)	Noise reduction node	Connects to 10nF capacitor to GND to filter reference voltage noise, enabling 30µV_RMS output noise.
OUT (Pin 5)	Regulated output	Delivers 3.3V at up to 250mA; requires ≥2.2µF ceramic capacitor to GND for loop stability.

Key Features

Feature	Design Value
Ultra-low-noise regulation	30µV_RMS output noise with 10nF BYPASS cap - enables clean power for RF ICs and high-resolution ADCs without external LDO post-filtering.
Wide-input, low-I_Q operation	69µA quiescent current at zero load - extends battery runtime in always-on monitoring devices such as smart meters and asset trackers.
Thermal and current protection	Integrated foldback current limit and thermal shutdown - prevents damage during sustained overload or PCB overheating without external circuitry.
Soft-start and active pulldown	Controlled turn-on ramp and output discharge on disable - avoids voltage glitches and bus contention in multi-rail systems.
High-PSRR, high-bandwidth rejection	70dB PSRR at 1kHz and 40dB at 1MHz - attenuates switching ripple from buck converters operating at 100kHz–2MHz frequencies.
Low-ESR ceramic capacitor support	Stable with 2.2µF X7R/X5R MLCC - eliminates ESR-dependent instability risks and reduces BOM count versus tantalum-based solutions.

Applications

Active Antenna mMIMO Systems	Industrial Motor Control Boards
Use Scenario: Powering RF front-end ICs (LNAs, PA drivers, phase shifters) in 5G base station active antenna arrays where phase coherence and low noise are critical. IC Role / Device Role / Timing Role: Low-noise post-regulator supplying 3.3V to RF signal chain components downstream of a switching DC/DC converter. Use Value: 30µV_RMS noise and 70dB PSRR prevent AM-to-PM distortion and maintain EVM performance under dynamic load conditions.	Use Scenario: Providing regulated 3.3V to microcontrollers, gate drivers, and isolated communication interfaces (RS-485, CAN) on motor drive PCBs exposed to high EMI. IC Role / Device Role / Timing Role: Primary 3.3V system rail generator with enable control synchronized to motor startup sequence. Use Value: ±0.5% accuracy over –40°C to +125°C ensures reliable MCU boot and ADC reference stability despite ambient thermal cycling.
Cordless Power Tools	Land Mobile Radios (LMR)
Use Scenario: Supplying 3.3V to digital control logic and battery fuel gauges in high-current cordless drills and impact drivers with Li-ion packs. IC Role / Device Role / Timing Role: Micropower LDO managing standby and active modes via ON/OFF pin controlled by host MCU. Use Value: 1.12µA shutdown current preserves battery charge during extended storage; 225mV dropout maintains regulation until cell voltage drops to ~3.53V.	Use Scenario: Delivering clean 3.3V to audio codecs, DSPs, and narrowband RF transceivers in ruggedized handheld radios operating in harsh RF environments. IC Role / Device Role / Timing Role: Low-noise bias source for analog audio stages and IF signal processing blocks. Use Value: 40dB PSRR at 1MHz suppresses switching artifacts from internal DC/DC converters, preventing audible beat tones in speaker output.

Active Antenna mMIMO Systems

Industrial Motor Control Boards

Use Scenario: Powering RF front-end ICs (LNAs, PA drivers, phase shifters) in 5G base station active antenna arrays where phase coherence and low noise are critical.

IC Role / Device Role / Timing Role: Low-noise post-regulator supplying 3.3V to RF signal chain components downstream of a switching DC/DC converter.

Use Value: 30µV_RMS noise and 70dB PSRR prevent AM-to-PM distortion and maintain EVM performance under dynamic load conditions.

Use Scenario: Providing regulated 3.3V to microcontrollers, gate drivers, and isolated communication interfaces (RS-485, CAN) on motor drive PCBs exposed to high EMI.

IC Role / Device Role / Timing Role: Primary 3.3V system rail generator with enable control synchronized to motor startup sequence.

Use Value: ±0.5% accuracy over –40°C to +125°C ensures reliable MCU boot and ADC reference stability despite ambient thermal cycling.

Cordless Power Tools

Land Mobile Radios (LMR)

Use Scenario: Supplying 3.3V to digital control logic and battery fuel gauges in high-current cordless drills and impact drivers with Li-ion packs.

IC Role / Device Role / Timing Role: Micropower LDO managing standby and active modes via ON/OFF pin controlled by host MCU.

Use Value: 1.12µA shutdown current preserves battery charge during extended storage; 225mV dropout maintains regulation until cell voltage drops to ~3.53V.

Use Scenario: Delivering clean 3.3V to audio codecs, DSPs, and narrowband RF transceivers in ruggedized handheld radios operating in harsh RF environments.

IC Role / Device Role / Timing Role: Low-noise bias source for analog audio stages and IF signal processing blocks.

Use Value: 40dB PSRR at 1MHz suppresses switching artifacts from internal DC/DC converters, preventing audible beat tones in speaker output.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPL7407LPGQ	7-channel high-side driver with integrated 3.3V LDO (150mA), higher I_Q (250µA), no BYPASS pin, 50µV_RMS noise	Targeted at LED/relay driver integration; lacks independent enable and low-noise optimization	Select only when consolidating driver + LDO functions; not suitable for standalone low-noise 3.3V rail generation.
MCP1703T-3302E/MB	3.3V LDO in SOT-23, 250mA, ±2% accuracy, 65µV_RMS noise, no BYPASS pin, 120mV dropout @ 250mA	Lower cost, lower performance: wider tolerance, higher noise, no soft-start or active pulldown	Acceptable for non-critical digital rails; avoid in RF/analog signal chains requiring <50µV_RMS noise.

Compared with TPL7407LPGQ and MCP1703T-3302E/MB, LP2992AILDX-3.3 delivers superior noise performance (30µV_RMS vs ≥50µV_RMS), tighter accuracy (±0.5% vs ±2%), and dedicated noise-reduction architecture via BYPASS pin-making it the only choice for RF and precision analog applications demanding sub-50µV_RMS noise.

Availability

LP2992AILDX-3.3 is available at Aetrix Electronics and suitable for industrial motor control boards, active antenna mMIMO systems, cordless power tools, and land mobile radios requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for LP2992AILDX-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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in power management IC design.

The LP2992 belongs to TI's micropower LDO family engineered for ultra-low-noise, wide-input, and high-PSRR applications in battery-powered and thermally constrained systems-particularly where post-regulation of switching supplies is essential.

FAQ

What is the maximum output current capability of the LP2992AILDX-3.3?

The LP2992AILDX-3.3 delivers up to 250mA of continuous output current while maintaining regulation and thermal safety. Peak output current is rated at 300–350mA under short-circuit conditions, with built-in foldback current limiting to protect the device during overload events across its full operating temperature range (–40°C to +125°C).

Does the LP2992AILDX-3.3 require an external bypass capacitor, and why?

Yes-the LP2992AILDX-3.3 requires a 10nF ceramic capacitor between the BYPASS pin and GND to achieve its specified 30µV_RMS output noise. This capacitor filters the internal bandgap reference voltage, directly reducing noise contribution to the error amplifier. Omitting it increases output noise to approximately 50–60µV_RMS, degrading performance in RF and precision analog applications.

What is the dropout voltage of the LP2992AILDX-3.3 at full load and high temperature?

At 250mA load and +125°C junction temperature, the LP2992AILDX-3.3 exhibits a maximum dropout voltage of 340mV. At room temperature, it is 225–260mV. This ultra-low dropout enables operation with minimal headroom-e.g., regulating 3.3V from a Li-ion cell discharging down to 3.525V while maintaining full 250mA capability.

Can the LP2992AILDX-3.3 be used with ceramic output capacitors smaller than 2.2µF?

No-the LP2992AILDX-3.3 is designed and characterized for stability with a minimum 2.2µF ceramic output capacitor (X5R/X7R, 10% tolerance). Using smaller values risks oscillation or poor transient response. The datasheet explicitly states that effective C_OUT must remain ≥1µF after derating, and 2.2µF nominal ensures this margin across voltage and temperature.

How does the ON/OFF pin function on the LP2992AILDX-3.3, and what happens when disabled?

The ON/OFF pin is active-high: driving it above 0.85V enables regulation; pulling it below 0.15V disables the output. When disabled, the LP2992AILDX-3.3 activates an internal pulldown circuit on the OUT pin, actively discharging the output capacitor to prevent floating or unintended biasing of downstream circuitry-a critical feature for safe power sequencing in multi-rail systems.

LP2992AILDX-3.3 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 6-WDFN Exposed Pad

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:: 6-WSON (2.92x3.29)

LP2992AILDX-3.3 FAQ

1.How can I place an order for LP2992AILDX-3.3 through Aetrix?

Please submit a Request for Quotation (RFQ) for LP2992AILDX-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 LP2992AILDX-3.3 reliable?

The price and inventory of LP2992AILDX-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 LP2992AILDX-3.3 is usually 5 days.

3.What payment methods are accepted for LP2992AILDX-3.3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2992AILDX-3.3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LP2992AILDX-3.3?

LP2992AILDX-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LP2992AILDX-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 LP2992AILDX-3.3?

For technical support, including LP2992AILDX-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2992AILDX-3.3 requirements.

6.How does Aetrix verify that LP2992AILDX-3.3 is sourced from the original manufacturer or authorized distributors?

All LP2992AILDX-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 LP2992AILDX-3.3 meets industry standards.

7.What is the process for return or replacement of LP2992AILDX-3.3?

All LP2992AILDX-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LP2992AILDX-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 LP2992AILDX-3.3 part is unused and in its original packaging.

Return procedure for LP2992AILDX-3.3:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…