REG101NA-3.3 Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
REG101NA-3.3 is a 100 mA low-dropout (LDO) linear voltage regulator from Texas Instruments in a SOT-23-5 package, providing a fixed 3.3 V output with ultra-low quiescent current and high PSRR. Designed for portable and battery-powered electronics requiring stable, low-noise 3.3 V regulation.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- REG101NA-3.3 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of REG101NA-3.3?
- Fixed 3.3 V output LDO regulator with 100 mA maximum output current
- Ultra-low quiescent current for extended battery life in portable designs
- SOT-23-5 package occupying less than 4 mm² of PCB area
- High power supply rejection ratio (PSRR) for low-noise analog supply rails
- Low dropout voltage enabling operation with inputs close to 3.3 V
- Stable operation with small ceramic output capacitors as low as 1 µF
What is REG101NA-3.3 used for?
The REG101NA-3.3 is ideal for providing a clean 3.3 V supply rail to microcontrollers, RF modules, and analog sensor circuits in battery-powered portable devices. Its ultra-low quiescent current makes it an efficient choice for sleep-mode dominated IoT nodes and wearable electronics where standby power must be minimized. The high PSRR performance also benefits precision ADC and DAC reference supply filtering, reducing measurement noise in mixed-signal system designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the REG101NA-3.3 datasheet?
REG101NA-3.3 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for REG101NA-3.3?
Compatible alternatives and drop-in replacements for REG101NA-3.3:
Frequently Asked Questions
Which designs can use REG101NA-3.3 when 5 pins is a required parameter?
REG101NA-3.3 is a practical fit when the design needs 5 pins in a integrated circuit from Texas Instruments. Buyers should confirm the package, lifecycle state, and original datasheet before approving it for production builds.
How should buyers compare REG101NA-3.3 with alternate integrated circuit options?
Use 100 mA as one verified requirement, then match the electrical ratings, footprint, and manufacturer series against the target BOM. This reduces substitution risk when similar parts differ in assembly or operating limits.
Which assembly detail should be checked before sourcing REG101NA-3.3 for production?
Confirm that the selected lot matches SOT23 (5-Pin) and the known 3.3 V requirement before RFQ approval. This gives incoming inspection and engineering teams a clearer basis for footprint, mating, or thermal review.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
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.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit