LP3984IMFX-1.5HALF Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
LP3984IMFX-1.5HALF is a 150 mA ultra-low-dropout LDO linear voltage regulator with a fixed 1.5 V output in a 5-pin SOT-23 package. It operates from a 2.5 V to 6 V input, features a 72 µA typical quiescent current, and requires only a 1 µF output capacitor, targeting portable consumer electronics and wireless module power supply applications.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- LP3984IMFX-1.5HALF Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LP3984IMFX-1.5HALF?
- Fixed 1.5 V output with 150 mA maximum load current
- Ultra-low 72 µA quiescent current for extended battery life
- 2.5 V to 6 V input range covering Li-Ion, USB, and 3.3 V/5 V system rails
- Only 1 µF output capacitor required for stable operation
- 5-pin SOT-23 package for ultra-compact PCB designs
- Stable with ceramic output capacitors enabling miniaturised power circuits
What is LP3984IMFX-1.5HALF used for?
The LP3984IMFX-1.5HALF is designed for space-constrained portable devices such as Bluetooth modules, wireless sensors, and wearable electronics that require a stable 1.5 V supply rail at up to 150 mA from a Li-Ion battery or a 3.3 V system bus. Its 72 µA quiescent current and 5-pin SOT-23 footprint also make it a suitable choice for always-on microcontroller sleep-mode power rails and camera module analog supply circuits in smartphones and IoT devices.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the LP3984IMFX-1.5HALF datasheet?
LP3984IMFX-1.5HALF Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LP3984IMFX-1.5HALF?
Compatible alternatives and drop-in replacements for LP3984IMFX-1.5HALF:
Frequently Asked Questions
What output voltage and maximum current does the LP3984IMFX-1.5HALF provide?
The device delivers a fixed 1.5 V output at up to 150 mA, with a typical output accuracy of ±1%, making it suitable for powering RF transceiver analog sections, low-power microcontrollers, and sensor interface circuits that require a regulated 1.5 V supply from a 2.5 V to 6 V source.
How does the low quiescent current of the LP3984IMFX-1.5HALF extend battery life in wireless IoT designs?
With only 72 µA typical quiescent current at no load and a 1.5 V output, the regulator draws less than 0.1% of a 100 mAh coin-cell capacity per hour in standby, allowing a wireless sensor node to remain powered for more than 1000 hours in sleep mode between transmit bursts.
What output capacitor does the LP3984IMFX-1.5HALF require for stability?
The device is stable with a minimum 1 µF ceramic capacitor (X5R or X7R) on the output, eliminating the need for tantalum or electrolytic capacitors and reducing the BOM to a single passive component at the output, which saves PCB area and cost in compact wearable and IoT module designs.
Is the LP3984IMFX-1.5HALF compatible with Li-Ion battery input voltages through discharge?
Yes, the 2.5 V minimum input voltage allows the regulator to continue producing 1.5 V output as a single Li-Ion cell discharges from 4.2 V down to roughly 2.7 V, providing reliable operation across the full useful discharge range of the battery without a boost converter.
How does the 5-pin SOT-23 package of LP3984IMFX-1.5HALF benefit module-level power design?
The SOT-23-5 package measures approximately 2.9 mm x 1.6 mm, making it one of the smallest available LDO packages and enabling placement within the tight keepout areas of RF modules, Bluetooth chips, and camera sensor PCBs where a TO-252 or SOT-223 regulator would not fit within the space constraints.
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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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