UC385T-2 Texas Instruments Integrated Circuit (Other) In Stock
Texas Instruments UC385T-2 is a high-current fixed positive linear voltage regulator capable of delivering 5A output current with an ultra-low dropout voltage of 0.35V nominal. It accepts input voltages from 1.7V to 7.5V, making it ideal for low-headroom power supply designs. Available from stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- UC385T-2 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $7.1100(MOQ 1)
- Temp Range
- ?°C to 100.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low dropout voltage of 0.35V nominal (0.49V max) enables efficient regulation even with minimal voltage headroom
- High output current capability of 5A suits demanding power-hungry loads in embedded and industrial systems
- Wide input voltage range from 1.7V to 7.5V with fixed output configuration simplifies power supply design
Applications
The UC385T-2 is well suited for powering point-of-load regulators in telecom and networking equipment where the input rail sits close to the regulated output voltage. Its high 5A current rating makes it a strong choice for desktop peripheral power supplies and embedded computing boards that require a stable fixed voltage with minimal thermal overhead. Industrial automation controllers and test instruments also benefit from its low-dropout characteristic when battery or bus voltage is nearly equal to the target output.
Specifications
| Pbfree Code | Yes |
| Date Of Intro | 1997-01-01 |
| YTEOL | 15 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.49V |
| Dropout Voltage1-Nom | 0.35V |
| Input Voltage Absolute-Max | 7.5V |
| Input Voltage-Max | 7.5V |
| Input Voltage-Min | 1.7V |
| JESD-30 Code | R-PSFM-T5 |
| JESD-609 Code | e3 |
| Load Regulation-Max | 0.004% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 100°C |
| Output Current1-Max | 5A |
| Output Voltage1-Max | 2.121V |
| Output Voltage1-Min | 2.079V |
| Output Voltage1-Nom | 2.1V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SIP5,.1,67TB |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Packing Method | TUBE |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 1.7mm |
| Terminal Position | SINGLE |
| Voltage Tolerance-Max | 1% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the minimum input-to-output voltage differential the UC385T-2 can regulate across at full 5A load?
At full 5A load, the UC385T-2 maintains regulation with a dropout voltage of 0.35V typical and 0.49V maximum, meaning the input need only be about 0.49V above the fixed output voltage. This extremely low headroom is a key advantage over standard LDOs that typically require 1V or more of dropout, saving energy and reducing heat in tight voltage-margin designs such as battery-powered or bus-powered systems.
For a 5V bus powering a 3.3V load at 4A, how does the UC385T-2 compare thermally to a standard linear regulator?
With an input of 5V and a fixed output near 3.3V, the voltage drop is roughly 1.7V at 4A, giving power dissipation of about 6.8W. A standard regulator with the same drop performs identically in this scenario, but the UC385T-2 low 0.35V dropout shines when the input drops to near 3.7V, where many regulators fall out of regulation while the UC385T-2 still maintains output accuracy. The TO-220-5 package aids thermal management at these high currents.
In which input voltage range can the UC385T-2 operate, and what absolute maximum voltage must not be exceeded?
The UC385T-2 accepts an input voltage ranging from 1.7V minimum to 7.5V absolute maximum. Exceeding 7.5V risks permanent device damage. This range targets low-voltage bus applications, and the part is not suitable for 12V or higher supply rails without additional pre-regulation. Designers should include input capacitors of at least 10 uF to ensure stability across the full 1.7V to 7.5V operating range.
When would UC385T-2 be preferred over a switching regulator for a 5A supply rail?
UC385T-2 is preferred when low noise and simplicity matter more than efficiency, for example in RF or audio circuits where switching noise would degrade signal quality. Its low 0.35V dropout means efficiency is high when the input-output difference is small, such as a 5V input to a 4.5V output at up to 5A. The TO-220-5 through-hole package also makes prototyping and rework straightforward without the fine-pitch soldering required by many switching regulator ICs.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $14.9400 | $14.94 |
| 10+ | $11.9600 | $119.60 |
| 29+ | $10.4500 | $303.05 |
| 50+ | $10.1100 | $505.50 |
| 500+ | $7.5200 | $3760.00 |
| 1000+ | $7.1100 | $7110.00 |
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