LP38690SD-3.3In StockTexas Instruments
LP38690SD-3.3 is a 1A fixed 3.3V LDO linear regulator IC from Texas Instruments. Features 0.65V typical dropout voltage, 2.7V to 10V input range, and low quiescent current. Ideal for portable and battery-powered applications requiring stable 3.3V supply.
- Manufacturer
- Texas Instruments
- Package
- Small Outline No-lead
- Pin Count
- 6
- Lifecycle
- OBSOLETE
- Datasheet
- LP38690SD-3.3 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1A output current with 0.65V typical dropout voltage for high efficiency
- Fixed 3.3V output with tight regulation for noise-sensitive digital circuits
- Wide input voltage range: 2.7V to 10V with 12V absolute maximum
- SOT-23 small outline no-lead package for compact PCB designs
- Low quiescent current ideal for battery-powered and portable applications
Applications
The LP38690SD-3.3 is well-suited for portable consumer electronics, IoT devices, and battery-powered systems that require a stable 3.3V regulated supply. It is commonly used to power microcontrollers, FPGAs, and digital logic circuits in space-constrained designs. Its low dropout voltage and compact package also make it a practical choice for post-regulator stages in multi-rail power architectures.
Specifications
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 1V |
| Dropout Voltage1-Nom | 0.65V |
| Input Voltage Absolute-Max | 12V |
| Input Voltage-Max | 10V |
| Input Voltage-Min | 2.7V |
| JESD-30 Code | S-PDSO-N6 |
| JESD-609 Code | e0 |
| Line Regulation-Max | 0.02046% |
| Load Regulation-Max | 0.16483% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 3.465V |
| Output Voltage1-Min | 3.135V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC6,.13,38 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Finish | TIN LEAD |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Voltage Tolerance-Max | 5% |
| Package | Small Outline No-lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LP38690SD-3.3:
Frequently Asked Questions
What is the output voltage and maximum output current of the LP38690SD-3.3?
The LP38690SD-3.3 provides a fixed 3.3V output with a maximum continuous output current of 1A. The output regulation is tight, making it suitable for powering sensitive digital ICs and microcontrollers requiring a stable 3.3V supply.
What is the dropout voltage of the LP38690SD-3.3 and why does it matter?
The LP38690SD-3.3 has a typical dropout voltage of 0.65V and a maximum of 1V. This means the input voltage needs to be only slightly above 3.3V to maintain regulation, which is critical for battery-powered designs where the supply rail voltage drops over time.
What input voltage range does the LP38690SD-3.3 support?
The LP38690SD-3.3 supports an input voltage range from 2.7V to 10V, with an absolute maximum rating of 12V. This wide range makes it compatible with a variety of power sources including single-cell Li-ion batteries and 5V or 9V DC supplies.
What package does the LP38690SD-3.3 come in and what are typical applications?
The LP38690SD-3.3 is available in a 6-pin Small Outline No-lead (SOT-23) package, ideal for compact PCB layouts. Typical applications include portable electronics, IoT sensor nodes, wearable devices, and any system needing a low-noise, efficient 3.3V regulator in a small footprint.
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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.
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