TPS2105DG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments TPS2105DG4 is a dual-input, single-output MOSFET power switch operating from 2.7 V to 5.5 V, providing automatic source selection and load protection in an SOP-8 package. From $1.20 in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- TPS2105DG4 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 TPS2105DG4?
- Dual-input, single-output power path with automatic source switchover selects highest available rail from 2.7 V to 5.5 V without glitches
- Integrated MOSFET switch with low on-resistance reduces conduction losses in battery-powered and dual-supply portable designs
- SOP-8 package with built-in overcurrent and inrush control simplifies power distribution design without external discrete protection components
What is TPS2105DG4 used for?
The TPS2105DG4 is designed for dual-supply power management in portable and battery-backed systems where automatic switchover between an adapter and battery rail is required. Operating from 2.7 V to 5.5 V, it is well-suited for laptops, tablet accessories, and handheld instruments that transition between USB power and single-cell lithium battery. Its integrated MOSFET and protection features also make it a compact solution for USB-powered peripheral load switching in consumer electronics.
What are the specifications of TPS2105DG4?
| YTEOL | 0 |
| Adjustable Threshold | NO |
| Analog IC - Other Type | LOAD SWITCH |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Channels | 1 |
| Number of Functions | 2 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.7V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
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 TPS2105DG4 datasheet?
TPS2105DG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TPS2105DG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the TPS2105DG4 automatically select between two input power sources without a microcontroller?
The TPS2105DG4 uses an internal comparator to sense the higher of its two input rails in the 2.7 V to 5.5 V range and automatically connects it to the output through the integrated MOSFET switch. This eliminates firmware-controlled GPIO switching and prevents reverse current flow between sources, enabling seamless failover from adapter to battery in portable systems.
What supply voltage range does the TPS2105DG4 support and which battery chemistries are compatible?
The TPS2105DG4 operates across a 2.7 V to 5.5 V input voltage range, supporting single-cell lithium-ion batteries (nominally 3.6 V to 4.2 V), two-cell NiMH packs (nominally 2.4 V to 3.0 V), and 5 V USB bus power. This makes it versatile for multi-source power architectures in consumer, medical, and industrial portable devices.
For which portable system designs does the TPS2105DG4 reduce total component count compared to discrete solutions?
The TPS2105DG4 replaces two discrete P-channel MOSFETs, a comparator, and several passive components needed for manual dual-source switching, consolidating this function into a single SOP-8 footprint of approximately 5 mm x 4 mm. This component integration is especially beneficial in space-constrained designs like wearables, USB hubs, and handheld test instruments.
How does TPS2105DG4 protect the load from inrush current and overcurrent conditions?
The TPS2105DG4 integrates inrush current control by limiting the slew rate of the output voltage during power-up, preventing large capacitive load current spikes that would otherwise cause supply voltage droop. Its built-in overcurrent limiting clamps output current during fault conditions, protecting the downstream load and upstream battery from damage without requiring external current-sense resistors.
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
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”
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