REG103FA-5KTTT Texas Instruments Integrated Circuit (Other) In Stock
REG103FA-5KTTT is a 5V fixed-output ultra-low dropout linear voltage regulator from Texas Instruments, featuring 0.115V typical dropout voltage, 500mA output current, and 16V absolute maximum input. Ideal for battery-powered and low-noise applications. From $3.91, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- REG103FA-5KTTT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.9129(MOQ 1)
- 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 REG103FA-5KTTT?
- Ultra-low dropout voltage of 0.115V typical (0.25V max) enables efficient operation close to output rail
- Fixed 5V output with tight regulation for stable power delivery in noise-sensitive designs
- Wide input voltage range from 5.25V to 15V supports diverse power supply architectures
- SOIC-5 (R-PSSO-G5) compact package optimized for space-constrained PCB layouts
- Lead-free (Pb-free) construction compliant with RoHS and JESD-609 e3 environmental standards
What is REG103FA-5KTTT used for?
The REG103FA-5KTTT is well-suited for battery-powered portable devices where minimizing voltage headroom loss is critical. It serves as a post-regulator in telecom and industrial equipment requiring clean, low-noise 5V rails. The device is also widely used in data acquisition systems, sensor interfaces, and audio circuits where stable, low-dropout regulation ensures accurate signal processing.
What are the specifications of REG103FA-5KTTT?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.25V |
| Dropout Voltage1-Nom | 0.115V |
| Input Voltage Absolute-Max | 16V |
| Input Voltage-Max | 15V |
| Input Voltage-Min | 5.25V |
| JESD-30 Code | R-PSSO-G5 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.175% |
| Load Regulation-Max | 0.175% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -55 °C |
| Output Current1-Max | 0.5A |
| Output Voltage1-Max | 5.1V |
| Output Voltage1-Min | 4.9V |
| Output Voltage1-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SMSIP5H,.6,67TB |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | NMOS |
| Terminal Finish | Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.7mm |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Tolerance-Max | 2.8% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the REG103FA-5KTTT datasheet?
REG103FA-5KTTT Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for REG103FA-5KTTT?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the dropout voltage of the REG103FA-5KTTT?
The REG103FA-5KTTT has a typical dropout voltage of 0.115V and a maximum dropout voltage of 0.25V at full load. This ultra-low dropout characteristic allows the regulator to maintain a stable 5V output even when the input supply is only slightly above 5V, making it ideal for battery-powered applications where supply voltage may be marginal.
What is the input voltage range for the REG103FA-5KTTT?
The REG103FA-5KTTT accepts an input voltage ranging from 5.25V minimum to 15V maximum, with an absolute maximum rating of 16V. Operating beyond 16V may permanently damage the device. For reliable regulation, ensure the input stays within the 5.25V–15V range at all times.
What package does the REG103FA-5KTTT use, and what are its key mechanical details?
The REG103FA-5KTTT comes in a 5-pin SOIC package (JESD-30 code R-PSSO-G5), a compact surface-mount outline that simplifies PCB layout in space-constrained designs. The package is lead-free (Pb-free, JESD-609 e3) and compliant with RoHS requirements, making it suitable for environmentally conscious product designs.
What are typical applications for the REG103FA-5KTTT?
The REG103FA-5KTTT is commonly used in battery-powered portable electronics, industrial sensors, audio equipment, and data acquisition systems requiring a clean, stable 5V supply. Its ultra-low dropout voltage and low quiescent current make it particularly effective in designs where power efficiency and noise performance are priorities.
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
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $7.8259 | $7.83 |
| 5+ | $5.0868 | $25.43 |
| 21+ | $3.9129 | $82.17 |
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