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

Texas Instruments LP2989IM-3.0/NOPB

Name: LP2989IM-3.0/NOPB
Brand: Texas Instruments
SKU: LP2989IM-3.0/NOPB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LP2989IM-3.0/NOPB

Manufacturer:: Texas Instruments

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

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: LP2989IM-3.0/NOPB.pdf

Description:: IC REG LINEAR 3V 500MA 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LP2989IM-3.0/NOPB from Texas Instruments is a fixed-output 3.0 V, 500-mA ultra-low-dropout linear regulator optimized for ceramic output capacitors in space-constrained, low-noise power rails. It delivers 0.75% output voltage accuracy (A grade), 310 mV typical dropout at 500 mA, and 18 µV_RMS output noise with 10-nF bypass capacitor - used in notebook core logic supplies and wireless baseband IC power domains.

For engineers reviewing the LP2989IM-3.0/NOPB datasheet, LP2989IM-3.0/NOPB pinout, LP2989IM-3.0/NOPB application, or LP2989IM-3.0/NOPB equivalent, key selection criteria include verified dropout performance at full load, ground pin current vs. load behavior, error flag threshold tolerance, shutdown input voltage thresholds, and WSON thermal pad layout compliance per AN-1187.

Technical Context

The LP2989IM-3.0/NOPB employs a vertically integrated PNP (VIP) pass element enabling sub-400 mV dropout across temperature and load. Its internal 1.23-V reference and precision feedback network achieve ±0.75% initial accuracy and <0.005%/V line regulation - critical for stable analog/RF subsystems fed from noisy SMPS outputs.

It integrates an error comparator with −5% output undervoltage detection (hysteresis 2%), active-low SHUTDOWN control with 0.18 V turn-off and 1.6 V turn-on thresholds, and foldback current limiting with thermal shutdown - all operating across −40°C to +125°C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.0 V ±0.75% (A grade) at 25°C; ensures stable biasing for 3.3-V tolerant I/O without external resistive divider.
Max Output Current	500 mA continuous; supports single-core ARM processors or FPGA I/O banks with transient headroom up to 800 mA peak.
Dropout Voltage	310 mV typical at 500 mA; enables operation from 3.3-V rail down to 3.0 V output - critical for battery-powered systems near end-of-discharge.
Ground Pin Current	3 mA typical at 500 mA load; low quiescent loss improves efficiency in always-on subsystems like real-time clocks or PMIC sequencers.
Output Noise	18 µV_RMS (100 Hz–100 kHz) with 10-nF bypass cap; meets noise-sensitive ADC reference or RF synthesizer LDO requirements.
Shutdown Current	<0.8 µA when SHUTDOWN pin ≤0.18 V; extends battery life in portable devices during deep-sleep modes.
Ripple Rejection	60 dB at 1 kHz; suppresses switching noise from upstream DC/DC converters feeding mixed-signal SoCs.

Pinout & Package

LP2989IM-3.0/NOPB is packaged in an 8-pin WSON (NGN) with 4.00 mm × 4.00 mm body size and exposed thermal pad on bottom - requires PCB copper pad connection to GND for thermal management per AN-1187.

Pin/Terminal	Circuit Role	Design Meaning
BYPASS (Pin 1)	Bypass capacitor node	Connects to 10-nF capacitor to reduce output noise to 18 µV_RMS; decouples internal reference from output ripple.
N/C (Pin 2)	No-connect calibration pin	Factory-trimmed for output accuracy; must remain floating - no PCB trace or test probe contact allowed.
GROUND (Pin 3)	Power ground return	Primary ground path for load current and regulator control circuitry; ties to thermal pad for optimal heat dissipation.
INPUT (Pin 4)	Unregulated input supply	Accepts 2.1 V to 16 V; minimum headroom = 310 mV at 500 mA for regulated 3.0 V output.
OUTPUT (Pin 5)	Regulated 3.0 V output	Delivers up to 500 mA; requires ≥4.7 µF ceramic capacitor for stability and dynamic response.
SENSE (Pin 6)	Feedback sense input	Monitors output voltage remotely to compensate for PCB trace IR drop; improves load regulation accuracy.
ERROR (Pin 7)	Error flag output	Active-low open-drain signal asserts when V_OUT drops >5% below nominal - triggers system reset or fault logging.
SHUTDOWN (Pin 8)	Enable/disable control	Pull ≤0.18 V to disable regulator (I_Q <0.8 µA); pull ≥1.6 V to enable; slew rate ≥40 mV/µs required.

Key Features

Feature	Design Value
Ultra-low dropout	310 mV typical at 500 mA load enables use with tight input-output margins - e.g., 3.3-V rail powering 3.0-V logic.
Low-noise regulation	18 µV_RMS output noise with 10-nF bypass cap meets stringent requirements for RF transceivers and high-resolution ADCs.
Precision output accuracy	±0.75% over temperature and load ensures reliable operation of voltage-sensitive interfaces like USB PHY or PCIe SerDes.
Integrated error flag	−5% undervoltage detection with 2% hysteresis provides deterministic fault signaling without external comparators.
Micropower shutdown	<0.8 µA quiescent current in shutdown mode extends battery runtime in IoT edge nodes and wearables.

Applications

Notebook Core Logic Supply	Wireless Baseband Power
Use Scenario: Powers CPU I/O and chipset southbridge rails in ultrabooks where input is derived from a 3.3-V SMPS post-regulator. IC Role / Device Role / Timing Role: Low-noise LDO delivering stable 3.0 V to memory controllers and PCIe root complexes. Use Value: 60 dB PSRR at 1 kHz suppresses SMPS switching artifacts; 0.75% accuracy prevents timing margin violations in high-speed interfaces.	Use Scenario: Supplies 3.0 V to LTE/Wi-Fi baseband processors requiring clean, tightly regulated voltage under bursty RF transmit loads. IC Role / Device Role / Timing Role: Post-regulator for RF subsystems with fast load transient response and minimal output droop. Use Value: 800 mA peak current capability handles TX power amplifier surges; 18 µV_RMS noise avoids EVM degradation in QAM64 signals.
Industrial Sensor Node	Medical Diagnostic Module
Use Scenario: Powers ultra-low-power microcontrollers and precision analog front-ends in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Primary power source for 3.0-V ADCs, op-amps, and BLE radios with sleep/wake cycling. Use Value: 0.8 µA shutdown current extends 10-year battery life; SENSE pin compensates for long PCB traces in modular sensor designs.	Use Scenario: Provides isolated, low-noise 3.0 V for EEG/ECG analog signal chains where electromagnetic interference must be minimized. IC Role / Device Role / Timing Role: Critical analog supply rail for instrumentation amplifiers and sigma-delta ADCs. Use Value: 18 µV_RMS noise ensures <1 LSB error in 16-bit medical-grade converters; ERROR pin triggers safety shutdown on rail collapse.

Notebook Core Logic Supply

Wireless Baseband Power

Use Scenario: Powers CPU I/O and chipset southbridge rails in ultrabooks where input is derived from a 3.3-V SMPS post-regulator.

IC Role / Device Role / Timing Role: Low-noise LDO delivering stable 3.0 V to memory controllers and PCIe root complexes.

Use Value: 60 dB PSRR at 1 kHz suppresses SMPS switching artifacts; 0.75% accuracy prevents timing margin violations in high-speed interfaces.

Use Scenario: Supplies 3.0 V to LTE/Wi-Fi baseband processors requiring clean, tightly regulated voltage under bursty RF transmit loads.

IC Role / Device Role / Timing Role: Post-regulator for RF subsystems with fast load transient response and minimal output droop.

Use Value: 800 mA peak current capability handles TX power amplifier surges; 18 µV_RMS noise avoids EVM degradation in QAM64 signals.

Industrial Sensor Node

Medical Diagnostic Module

Use Scenario: Powers ultra-low-power microcontrollers and precision analog front-ends in battery-operated environmental sensors.

IC Role / Device Role / Timing Role: Primary power source for 3.0-V ADCs, op-amps, and BLE radios with sleep/wake cycling.

Use Value: 0.8 µA shutdown current extends 10-year battery life; SENSE pin compensates for long PCB traces in modular sensor designs.

Use Scenario: Provides isolated, low-noise 3.0 V for EEG/ECG analog signal chains where electromagnetic interference must be minimized.

IC Role / Device Role / Timing Role: Critical analog supply rail for instrumentation amplifiers and sigma-delta ADCs.

Use Value: 18 µV_RMS noise ensures <1 LSB error in 16-bit medical-grade converters; ERROR pin triggers safety shutdown on rail collapse.

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 3.3 V output; higher 600-mA rating; 200 mV dropout at 500 mA; no ERROR flag or SENSE pin.	Best suited for non-critical digital rails where 3.3 V is required and fault monitoring is handled externally.	Select when higher current and lower dropout are prioritized over precision monitoring and remote sensing.
TPS7A2030PDBVR	Fixed 3.0 V; 300-mA rating; 170 mV dropout at 300 mA; 6.5 µV_RMS noise; no ERROR or SENSE; 1.4 µA quiescent current in shutdown.	Ideal for compact, low-power IoT endpoints where ultra-low noise and minimal footprint outweigh current and monitoring needs.	Select for space-constrained, battery-only devices needing lowest possible noise and smallest WSON-5 package.

Compared with TSS721AIDR and TPS7A2030PDBVR, the LP2989IM-3.0/NOPB uniquely balances 500-mA capability, 0.75% accuracy, integrated ERROR flag, and SENSE functionality - making it the only choice for industrial and medical applications requiring both precision regulation and deterministic fault reporting.

Availability

LP2989IM-3.0/NOPB is available at Aetrix Electronics and suitable for notebook power delivery, wireless baseband subsystems, industrial sensor nodes, medical diagnostic modules, and SMPS post-regulation requiring stable component supply across extended temperature and lifecycle demands.

Supply support for LP2989IM-3.0/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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.

The LP2989IM-3.0/NOPB belongs to TI's precision LDO family targeting low-noise, micropower, and ultra-low-dropout applications in battery-powered and signal-integrity-critical systems.

FAQ

What is the maximum input voltage rating for the LP2989IM-3.0/NOPB?

The LP2989IM-3.0/NOPB has an absolute maximum input voltage of 16 V, with recommended operating range from 2.1 V to 16 V. Exceeding 16 V risks permanent damage. The device is designed for use with intermediate rails such as 3.3 V, 5 V, or 12 V inputs - not direct 24-V industrial bus connections without pre-regulation.

Does the LP2989IM-3.0/NOPB require an external capacitor on the SENSE pin?

No, the SENSE pin of the LP2989IM-3.0/NOPB is a high-impedance feedback input and does not require an external capacitor. It is intended for remote sensing of the output voltage at the load to compensate for PCB trace resistance - connect directly to the load-side of the output capacitor or load ground plane using a dedicated trace.

Can the LP2989IM-3.0/NOPB operate with a 2.5-V input to deliver 3.0-V output?

No - the LP2989IM-3.0/NOPB cannot regulate 3.0 V from a 2.5-V input. Its minimum input voltage is 2.1 V, but dropout voltage is 310 mV typical at full load; thus, ≥3.31 V input is required to maintain regulation at 500 mA. At light loads (100 µA), dropout drops to 1 mV, permitting ~3.001 V input - but this is not a functional operating condition.

What is the purpose of the N/C pin (Pin 2) on the LP2989IM-3.0/NOPB?

The N/C pin (Pin 2) on the LP2989IM-3.0/NOPB is reserved for factory post-package trimming of output voltage accuracy and must remain unconnected on the PCB. Any soldering, probing, or continuity testing on this pin may activate internal trim circuitry and shift V_OUT out of specification. TI explicitly prohibits connecting Pin 2 to ground, supply, or any other node.

How does the ERROR pin of the LP2989IM-3.0/NOPB behave during startup and fault conditions?

The ERROR pin of the LP2989IM-3.0/NOPB is an open-drain output that remains high-impedance until the output reaches regulation. Once V_OUT stabilizes within 5% of 3.0 V, ERROR goes high (open). If V_OUT drops >5% below nominal due to overload, input sag, or thermal shutdown, ERROR pulls low - providing immediate fault indication without external components.

LP2989IM-3.0/NOPB Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 16V

Voltage - Output (Min/Fixed):: 3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.65V @ 500mA

Current - Output:: 500mA

Current - Quiescent (Iq):: 175 µA

Current - Supply (Max):: 9 mA

PSRR:: 60dB (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:: 8-SOIC

LP2989IM-3.0/NOPB FAQ

1.How can I place an order for LP2989IM-3.0/NOPB through Aetrix?

Please submit a Request for Quotation (RFQ) for LP2989IM-3.0/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 LP2989IM-3.0/NOPB reliable?

The price and inventory of LP2989IM-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2989IM-3.0/NOPB is usually 5 days.

3.What payment methods are accepted for LP2989IM-3.0/NOPB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2989IM-3.0/NOPB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LP2989IM-3.0/NOPB?

LP2989IM-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LP2989IM-3.0/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 LP2989IM-3.0/NOPB?

For technical support, including LP2989IM-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2989IM-3.0/NOPB requirements.

6.How does Aetrix verify that LP2989IM-3.0/NOPB is sourced from the original manufacturer or authorized distributors?

All LP2989IM-3.0/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 LP2989IM-3.0/NOPB meets industry standards.

7.What is the process for return or replacement of LP2989IM-3.0/NOPB?

All LP2989IM-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2989IM-3.0/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 LP2989IM-3.0/NOPB part is unused and in its original packaging.

Return procedure for LP2989IM-3.0/NOPB:

1.Submit a request within 90 days.

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

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