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LP2989AIMM-3.3/NOPB
Texas Instruments
IC REG LINEAR 3.3V 500MA 8VSSOP
3163 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 500mA 8-VSSOP
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5.0 / 5.0
- (404 Ratings)
LP2989AIMM-3.3/NOPB
Product Overview
1303782
DiGi Electronics Part Number
LP2989AIMM-3.3/NOPB-DGManufacturer
Texas Instruments
LP2989AIMM-3.3/NOPB
Description
IC REG LINEAR 3.3V 500MA 8VSSOPInventory
3163 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 500mA 8-VSSOP
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
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365 - Day Quality Guarantee - Every part fully backed.
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LP2989AIMM-3.3/NOPB Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Packaging
-
Series
-
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)
0.65V @ 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
Mounting Type
Surface Mount
Package / Case
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package
8-VSSOP
Base Product Number
LP2989
Datasheet & Documents
HTML Datasheet
LP2989AIMM-3.3/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
LP2989AIMM33NOPB
296-LP2989AIMM-3.3/NOPBTR
LP2989AIMM-3.3/NOPBTR
2156-LP2989AIMM-3.3/NOPB-TI
*LP2989AIMM-3.3/NOPB
LP2989AIMM-3.3/NOPBDKR-DG
LP2989AIMM-3.3/NOPBCT-DG
296-LP2989AIMM-3.3/NOPBCT
LP2989AIMM-3.3/NOPBTR-DG
LP2989AIMM-3.3/NOPBCT
LP2989AIMM-3.3CT-NDR
296-LP2989AIMM-3.3/NOPBDKR
LP2989AIMM-3.3/NOPBDKR
NATNSCLP2989AIMM-3.3/NOPB
LP2989AIMM-3.3TR-NDR
Standard Package
1,000
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
價格優惠外，加上店員親切友善，讓我每次都樂於回來選購，服務真的讓人感到溫暖又貼心。
de desembre 02, 2025
DiGi Electronics demonstrates exceptional inventory management, ensuring a seamless shopping experience.
de desembre 02, 2025
The site layout effectively highlights important information, streamlining my decision-making.
de desembre 02, 2025
Exceptional product quality that I can depend on for daily use.
de desembre 02, 2025
The delivery speed is impressive—my orders arrive faster than I expected, even for international shipments.
de desembre 02, 2025
The delivery personnel at DiGi Electronics handled my package with care, ensuring it arrived in perfect condition.
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Frequently Asked Questions (FAQ)
Can the LP2989AIMM-3.3/NOPB still be reliably sourced for new product designs given its obsolete status, and what are the risks of using it in a long-lifecycle industrial application?
Although the LP2989AIMM-3.3/NOPB is marked as obsolete by Texas Instruments, 3,142 new original units are currently in stock, which may support short-term prototyping or low-volume production. However, for long-lifecycle designs—especially in industrial, medical, or automotive systems—using an obsolete part introduces significant supply chain risk. TI no longer guarantees future availability, and end-of-life (EOL) notifications mean last-time buys may be the only future option. We recommend qualifying a drop-in replacement such as the TPS7A2633DRVR early in the design phase to avoid costly redesigns or last-minute sourcing crises.
What are the key thermal and layout considerations when replacing the LP2989AIMM-3.3/NOPB in a high-ambient-temperature environment near its 125°C operating limit?
The LP2989AIMM-3.3/NOPB has a maximum junction temperature of 125°C and relies on the PCB for heat dissipation due to its 8-VSSOP package with no exposed thermal pad. In high-ambient environments (e.g., >85°C), even modest load currents can push the device into thermal shutdown. To mitigate this, increase copper area under and around the package, use multiple vias to a ground plane on the backside, and avoid placing heat-sensitive components nearby. Always perform thermal imaging under worst-case load and temperature conditions—derating output current above 85°C ambient is strongly advised to maintain reliability.
How does the LP2989AIMM-3.3/NOPB compare to the TPS7A2633DRVR in terms of dropout voltage, quiescent current, and transient response for battery-powered applications?
The LP2989AIMM-3.3/NOPB has a higher dropout voltage (0.65V at 500mA) and quiescent current (175 µA) compared to the TPS7A2633DRVR, which offers 250mV dropout at 300mA and only 3.5 µA Iq. For battery-powered systems where efficiency and runtime are critical, the TPS7A2633DRVR is a superior choice, especially under light loads. Additionally, the TPS7A26 features better transient response due to its advanced architecture. If your design operates near the input voltage threshold or relies on long sleep-mode battery life, migrating to the TPS7A2633DRVR will reduce power loss and extend operational life.
Is the LP2989AIMM-3.3/NOPB suitable for noise-sensitive analog circuits like ADC references or RF modules, and how effective is its 60dB PSRR at 1kHz in real-world scenarios?
While the LP2989AIMM-3.3/NOPB offers 60dB PSRR at 1kHz, its noise performance may not be sufficient for high-precision analog systems without additional filtering. Linear regulators like this one exhibit declining PSRR at higher frequencies (e.g., >10kHz), where switching noise from DC-DC converters often resides. For ADC reference rails or RF front-ends, we recommend adding a low-ESR ceramic capacitor close to the load and possibly a pi-filter (LC or RC) upstream. Also consider bypassing the output with a 10µF tantalum or low-ESR ceramic cap in parallel with a 100nF ceramic to suppress high-frequency ripple. For ultra-low-noise needs, evaluate low-noise LDOs like the TPS7A4700 instead.
What protection features does the LP2989AIMM-3.3/NOPB offer during fault conditions, and are there any hidden failure modes designers should anticipate during integration?
The LP2989AIMM-3.3/NOPB includes over-current, short-circuit, and over-temperature protection, which help prevent catastrophic failure during output shorts or overloads. However, a key limitation is the lack of reverse-polarity or reverse-current protection—applying a voltage to the output while the input is grounded can damage the device. Additionally, the enable pin should not be driven above VIN + 0.3V, as this may cause latch-up or internal damage. Always ensure proper sequencing if used in systems with multiple voltage domains. For robust designs, add external reverse-blocking diodes or use regulators with built-in protection like the TPS7A2633DRVR, which includes integrated reverse-current protection.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
LP2989AIMM-3.3/NOPB CAD Models
Texas Instruments LP2989AIMM-3.3/NOPB PCB symbols & footprints
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