LP3990TL-1.5 Texas Instruments Integrated Circuit (Other) In Stock
The LP3990TL-1.5 is a fixed 1.5 V ultra-low-dropout linear voltage regulator in a 4-ball PBGA package. It features a 120 mV typical dropout voltage, 2 V to 6 V input range, and 0.005% maximum line regulation. Available from stock worldwide with competitive pricing.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 4
- Lifecycle
- OBSOLETE
- Datasheet
- LP3990TL-1.5 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LP3990TL-1.5?
- 120 mV typical dropout voltage at full load enables operation from 1.62 V to 6 V input rails in tightly constrained portable power designs
- Fixed 1.5 V output with 0.005% maximum line regulation delivers stable supply to LPDDR memory and low-voltage logic cores
- 4-ball PBGA (R-PBGA-B4) wafer-scale package occupies minimal PCB area for space-constrained wearable and IoT modules
What is LP3990TL-1.5 used for?
The LP3990TL-1.5 is targeted at battery-powered wearables, Bluetooth modules, and IoT sensor nodes where the 1.5 V rail must remain stable despite the varying input from a lithium coin cell or LiPo battery. Its ultra-low 120 mV dropout allows the device to continue regulating until the battery reaches near-end-of-life, maximizing runtime. The tiny PBGA footprint also suits cellular modem accessories and compact medical sensor patches where every square millimeter of board space counts.
What are the specifications of LP3990TL-1.5?
| Pbfree Code | No |
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 0.12V |
| Input Voltage Absolute-Max | 6.5V |
| Input Voltage-Max | 6V |
| Input Voltage-Min | 2V |
| JESD-30 Code | R-PBGA-B4 |
| JESD-609 Code | e0 |
| Line Regulation-Max | 0.005% |
| Load Regulation-Max | 0.011% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.15A |
| Output Voltage1-Max | 1.5375V |
| Output Voltage1-Min | 1.4625V |
| Output Voltage1-Nom | 1.5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | BGA4,2X2,20 |
| Package Shape | RECTANGULAR |
| Package Style | GRID ARRAY, VERY THIN PROFILE, FINE PITCH |
| Packing Method | TR |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Finish | TIN LEAD |
| Terminal Form | BALL |
| Terminal Pitch | 0.5mm |
| Terminal Position | BOTTOM |
| Voltage Tolerance-Max | 2.5% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LP3990TL-1.5 datasheet?
LP3990TL-1.5 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LP3990TL-1.5?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 120 mV dropout voltage of the LP3990TL-1.5 extend battery life in a 1.5 V coin-cell application?
With a typical dropout of 120 mV, the LP3990TL-1.5 continues to regulate the 1.5 V output until the input supply falls to approximately 1.62 V, allowing a lithium coin cell to discharge significantly deeper before the regulator drops out of regulation. A standard 300 mV dropout LDO would require the supply to stay above 1.8 V, losing roughly 10% to 15% of usable battery capacity on a 3 V cell running through a voltage divider or secondary stage.
Which low-voltage logic or memory interfaces benefit most from the LP3990TL-1.5 fixed output?
The LP3990TL-1.5 fixed 1.5 V output is a direct match for LPDDR2 and LPDDR3 DRAM VDD rails, as well as for 1.5 V I/O banks on FPGAs and microcontrollers that require a dedicated supply separate from the 1.8 V or 3.3 V core rails. Its 0.005% line regulation ensures that voltage droop during DRAM burst accesses stays well within the ±50 mV tolerance required by JEDEC standards.
For a compact IoT sensor design, how does the LP3990TL-1.5 PBGA package compare to a conventional SOT-23 LDO in board-space terms?
The 4-ball PBGA (R-PBGA-B4) package of the LP3990TL-1.5 occupies a die-size footprint typically under 1 mm x 1 mm with a 0.5 mm ball pitch, compared to a standard SOT-23-5 outline that measures approximately 2.9 mm x 1.6 mm. This difference saves more than 3 mm² per regulator instance, which is meaningful in multilayer IoT modules where power supply components compete for surface area with antennas and RF shields.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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