LD1086DT50R STMicroelectronics Integrated Circuit (Other) In Stock
LD1086DT50R is a fixed 5.0V, 1.5A low-dropout linear voltage regulator from STMicroelectronics with 1.3V typical dropout and up to 30V input voltage range. It delivers 0.01% line regulation and 0.035% load regulation in a D2PAK (TO-263) surface-mount package for robust power conversion. Available from authorized distributors with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 3
- Lifecycle
- OBSOLETE
- Datasheet
- LD1086DT50R Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1.5 A output current capability with only 1.3 V typical dropout voltage supports efficient power delivery from input rails as low as 6.6 V
- 0.01% line regulation and 0.035% load regulation deliver tight 5.0 V output for precision analog and digital supply rails
- D2PAK (R-PSSO-G2 / TO-263) surface-mount package provides excellent thermal dissipation with a large exposed pad for PCB heatsinking
- Fixed 5.0 V output eliminates external resistor dividers, simplifying PCB layout and improving output voltage accuracy
Applications
The LD1086DT50R provides a regulated 5.0V rail from higher-voltage bus supplies in industrial control boards, embedded systems, and PLC I/O modules that need a stable logic supply with up to 1.5A load current. Its low 1.3V dropout is well-suited to applications powered from a 6V to 7V intermediate rail where a standard 2V-dropout regulator would waste excessive power. The D2PAK footprint enables efficient PCB-conducted heat removal without an external heatsink in most sub-1A applications.
Specifications
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 1.5V |
| Dropout Voltage1-Nom | 1.3V |
| Input Voltage Absolute-Max | 30V |
| Input Voltage-Max | 30V |
| Input Voltage-Min | 6.6V |
| JESD-30 Code | R-PSSO-G2 |
| Line Regulation-Max | 0.01% |
| Load Regulation-Max | 0.035% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 1.5A |
| Output Voltage1-Max | 5.1V |
| Output Voltage1-Min | 4.9V |
| Output Voltage1-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SMSIP3H,.38,90TB |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Form | GULL WING |
| Terminal Pitch | 2.25mm |
| Terminal Position | SINGLE |
| Voltage Tolerance-Max | 2% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LD1086DT50R:
Frequently Asked Questions
What is the minimum input voltage required by LD1086DT50R to maintain 5.0V regulation at 1.5A load?
The LD1086DT50R requires a minimum input voltage of 6.6V (5.0V output plus 1.3V typical dropout, with 0.2V margin). At full 1.5A load the maximum dropout is 1.5V, so the input must remain above 6.5V to guarantee regulation across temperature and process variation.
How does LD1086DT50R compare to a standard LM7805 regulator for efficiency on a 6V input rail?
An LM7805 has a minimum dropout of approximately 2V, making it unable to regulate from a 6V input rail at full load. The LD1086DT50R's 1.3V typical dropout allows reliable 5.0V regulation from supplies as low as 6.6V, reducing wasted power by more than 50% on a 6V-to-5V conversion at 1A, from approximately 1 W down to 0.6 W.
What thermal considerations apply when running LD1086DT50R at 1.5A from a 12V supply?
At 12V input and 5.0V output with 1.5A load, power dissipation is (12 - 5) × 1.5 = 10.5 W. The D2PAK package has a junction-to-board thermal resistance of approximately 5°C/W with a good copper pour, giving a junction temperature rise of about 52°C above the PCB temperature, requiring thermal management such as a copper fill or heatsink pad rated for the expected ambient.
For which embedded applications is LD1086DT50R a practical fixed-output choice?
It is well-suited for generating the 5.0V logic rail in Arduino-style development boards, USB hub power stages, and relay driver supply circuits where load current reaches 1.5 A and board simplicity is preferred over a switching regulator. Its 0.035% load regulation ensures microcontroller supply voltage remains within ±25 mV even as peripheral loads switch on and off.
Related Guides
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”