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Texas Instruments LP2989AIMM-3.0/NOPB
- Part No.:
- LP2989AIMM-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LP2989AIMM-3.0/NOPB.pdf
- Description:
- IC REG LINEAR 3V 500MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,372
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Product details
Overview
LP2989AIMM-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, battery-powered systems. It delivers 0.75% output voltage accuracy (A grade), 310 mV typical dropout at 500 mA, and 18 µVRMS output noise with 10-nF bypass capacitor - enabling precision power for RF front-ends and low-noise analog circuits.
For engineers reviewing the LP2989AIMM-3.0/NOPB datasheet, LP2989AIMM-3.0/NOPB pinout, LP2989AIMM-3.0/NOPB application, or LP2989AIMM-3.0/NOPB equivalent, key selection criteria include its 2.1–16 V input range, <0.8 µA shutdown current, error flag output, thermal/overcurrent protection, and WSON-8 package compatibility with high-density PCB layouts.
Technical Context
The LP2989AIMM-3.0/NOPB uses a vertically integrated PNP (VIP) pass transistor architecture to achieve ultra-low dropout and minimal ground pin current across load conditions. Its internal 1.23-V reference and precision feedback network enable tight line regulation (0.005%/V typical) and low temperature coefficient (20 ppm/°C).
It integrates an error comparator that asserts low when output drops >5% below nominal, plus a dedicated SHUTDOWN pin with defined turn-on (>1.6 V) and turn-off (<0.18 V) thresholds - supporting controlled power sequencing without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±0.75% (A grade) at 25°C - ensures stable bias for ADC references and PLL VCOs without trimming. |
| Max Output Current | 500 mA continuous - supports single-rail powering of microcontrollers, sensors, and interface ICs. |
| Dropout Voltage | 310 mV typical at 500 mA - enables operation from 3.31 V input, critical for Li-ion battery discharge tail-end. |
| Quiescent Current | 75 µA typical - extends battery life in always-on monitoring nodes; <0.8 µA in shutdown mode. |
| Output Noise | 18 µVRMS (100 Hz–100 kHz) with 10-nF bypass cap - meets low-noise requirements for RF receivers and precision op-amps. |
| PSRR | 60 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters in hybrid power architectures. |
| Operating Temp | −40°C to +125°C junction - qualified for automotive infotainment and industrial control environments. |
Pinout & Package
LP2989AIMM-3.0/NOPB is packaged in an 8-pin WSON (NGN) package measuring 4.00 mm × 4.00 mm with exposed thermal pad. The thermal pad must be connected to PCB ground plane via thermal vias for reliable power dissipation up to 750 mW.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BYPASS (Pin 1) | Bypass capacitor node | Connects 10-nF capacitor to GND to reduce output noise to 18 µVRMS; essential for RF/analog applications. |
| N/C (Pin 2) | No-connect calibration pin | Factory-trimmed for output accuracy; must remain floating - no PCB trace or test probe connection. |
| GROUND (Pin 3) | Power ground return | Primary GND path for regulator core; ties to thermal pad for thermal management and noise control. |
| INPUT (Pin 4) | Unregulated input supply | Accepts 2.1–16 V; connects directly to bulk input capacitor; must exceed VOUT + dropout for regulation. |
| OUTPUT (Pin 5) | Regulated 3.0 V output | Delivers up to 500 mA; requires ≥4.7 µF ceramic output capacitor for stability and transient response. |
| SENSE (Pin 6) | Feedback voltage sense | Monitors output at load point; enables remote sensing to compensate for PCB trace IR drop. |
| ERROR (Pin 7) | Error flag output | Open-drain logic-low signal when VOUT falls >5% - used for system fault detection or supervisor reset assertion. |
| SHUTDOWN (Pin 8) | Enable/disable control | Active-high logic input; >1.6 V = ON, <0.18 V = OFF; slew rate ≥40 mV/µs required to avoid metastability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 310 mV @ 500 mA enables operation from partially discharged batteries and low-headroom supplies. |
| Low-noise regulation | 18 µVRMS output noise with bypass cap supports sensitive analog/RF circuitry without additional filtering. |
| Precision output accuracy | ±0.75% over temperature ensures reliable ADC reference, sensor excitation, and clock buffer biasing. |
| Integrated error flag | Dedicated open-drain ERROR pin provides immediate system-level fault indication without external comparators. |
| Thermal & current protection | Foldback current limit and thermal shutdown prevent damage during overload or poor heatsinking conditions. |
Applications
| Wireless Transceiver Power | Industrial Sensor Node |
|---|---|
Use Scenario: Powers RF front-end ICs (e.g., LNA, mixer, PA bias) in sub-GHz ISM-band modules. IC Role / Device Role / Timing Role: Low-noise 3.0 V supply for analog signal chain; replaces discrete RC filters and ferrite beads. Use Value: 18 µVRMS noise and 60 dB PSRR suppress switching artifacts from shared DC/DC rails, improving receiver sensitivity by ≥2 dB. | Use Scenario: Powers ultra-low-power MCU, MEMS accelerometer, and 16-bit ADC in battery-operated condition monitoring edge device. IC Role / Device Role / Timing Role: Primary system rail with shutdown control synchronized to sensor sampling intervals. Use Value: <0.8 µA shutdown current extends 10-year battery life; 0.75% accuracy maintains ADC full-scale linearity across temperature. |
| Automotive Infotainment Core | Medical Wearable Bias Supply |
Use Scenario: Supplies 3.0 V to audio codec, touch controller, and display interface in head unit main board. IC Role / Device Role / Timing Role: Post-regulator after buck converter; provides clean, sequenced power with error reporting. Use Value: −40°C to +125°C operation and built-in thermal shutdown meet AEC-Q100 Grade 2 requirements; ERROR pin feeds into system watchdog. | Use Scenario: Delivers regulated 3.0 V to ECG analog front-end and Bluetooth LE SoC in compact patch-style monitor. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete LDO + supervisor + filter network. Use Value: WSON-8 footprint (4 mm × 4 mm) reduces board area by 60% vs SOIC-8; SENSE pin compensates for flex-cable voltage drop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLS850F3TAV50 | Automotive-grade 3.3 V output; higher 500 mA dropout (450 mV); integrated watchdog and reset generator. | Designed for ASIL-B safety-critical domains; includes diagnostic features not present in LP2989AIMM-3.0/NOPB. | Select when functional safety compliance (ISO 26262) and system-level supervision are required. |
| MCP1826T-3002E/DB | 3.0 V output; 500 mA rating; 350 mV dropout at 500 mA; 65 µA quiescent current; no ERROR pin or SENSE input. | Lacks error flag and remote sensing - suitable for cost-sensitive, non-fault-tolerant consumer applications. | Select when footprint compatibility and basic regulation suffice, and diagnostics are handled externally. |
Compared with TLS850F3TAV50 and MCP1826T-3002E/DB, LP2989AIMM-3.0/NOPB uniquely balances ultra-low noise (18 µVRMS), precision accuracy (±0.75%), and integrated error reporting in a compact WSON package - making it optimal for high-fidelity analog and battery-constrained designs where diagnostics and noise performance are primary constraints.
Availability
LP2989AIMM-3.0/NOPB is available at Aetrix Electronics and suitable for wireless transceivers, industrial sensor nodes, automotive infotainment systems, and medical wearables requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LP2989AIMM-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 company delivering analog and embedded processing solutions, with leadership in power management ICs and precision analog design.
The LP2989AIMM-3.0/NOPB belongs to TI's micropower LDO family engineered for ultra-low-noise, high-accuracy regulation in battery-powered and noise-sensitive applications - emphasizing dropout performance, thermal robustness, and integrated fault signaling.
FAQ
What is the maximum input voltage for LP2989AIMM-3.0/NOPB?
The LP2989AIMM-3.0/NOPB supports 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 per Absolute Maximum Ratings. For reliable operation, maintain VIN ≥ VOUT + dropout (≥3.31 V at 500 mA) and ensure proper input capacitance (≥2.2 µF ceramic) to prevent instability.
Does LP2989AIMM-3.0/NOPB require an external bypass capacitor?
Yes - LP2989AIMM-3.0/NOPB requires a 10-nF capacitor between BYPASS (Pin 1) and GROUND (Pin 3) to achieve its specified 18 µVRMS output noise. Omitting this capacitor increases noise to ~100 µVRMS. The capacitor must be placed close to the pins with short, low-inductance traces to preserve high-frequency noise suppression.
How does the ERROR pin on LP2989AIMM-3.0/NOPB function?
The ERROR pin (Pin 7) is an open-drain output that pulls low when the regulated OUTPUT voltage drops more than approximately 5% below 3.0 V - indicating dropout, overload, or thermal shutdown. It remains high-impedance otherwise. An external pull-up resistor (typically 10 kΩ to 3.3 V) is required for proper logic-level interfacing with microcontrollers or supervisors.
Can LP2989AIMM-3.0/NOPB be used with ceramic output capacitors?
Yes - LP2989AIMM-3.0/NOPB is specifically designed for stable operation with ceramic output capacitors ≥4.7 µF. Unlike older LDOs, it does not require ESR-based damping, eliminating the need for tantalum or aluminum electrolytic capacitors. Larger ceramic values improve transient response and reduce output impedance across frequency.
What is the thermal pad connection requirement for LP2989AIMM-3.0/NOPB in WSON-8 package?
The exposed thermal pad on LP2989AIMM-3.0/NOPB must be soldered to a PCB copper pour tied to GROUND (Pin 3). Use ≥4 thermal vias (0.3 mm diameter) under the pad, filled or capped, connecting to inner-layer ground planes. Do not float or connect the pad to any voltage other than GND - incorrect routing causes thermal runaway or degraded PSRR.
LP2989AIMM-3.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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):
- 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-VSSOP
LP2989AIMM-3.0/NOPB FAQ
1.How can I place an order for LP2989AIMM-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2989AIMM-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 LP2989AIMM-3.0/NOPB reliable?
The price and inventory of LP2989AIMM-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 LP2989AIMM-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LP2989AIMM-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2989AIMM-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2989AIMM-3.0/NOPB?
LP2989AIMM-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2989AIMM-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 LP2989AIMM-3.0/NOPB?
For technical support, including LP2989AIMM-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2989AIMM-3.0/NOPB requirements.
6.How does Aetrix verify that LP2989AIMM-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LP2989AIMM-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 LP2989AIMM-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LP2989AIMM-3.0/NOPB?
All LP2989AIMM-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP2989AIMM-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 LP2989AIMM-3.0/NOPB part is unused and in its original packaging.
Return procedure for LP2989AIMM-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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