LP2985A-33DBVTE4 Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
LP2985A-33DBVTE4 is a 150mA low-noise low-dropout LDO regulator with shutdown control. Fixed 3.3V output, 280mV typical dropout, 16V max input, 75µV RMS noise. Ideal for battery-powered and noise-sensitive applications. From $0.11 in stock, worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- LP2985A-33DBVTE4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1101(MOQ 500)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 150mA output current with only 280mV typical dropout voltage at full load
- Ultra-low noise: 75µV RMS output noise ideal for RF and analog circuits
- Fixed 3.3V regulated output with ±1% accuracy over temperature
- Built-in shutdown pin for power sequencing and system power management
- Wide input voltage range 3.99V to 16V in compact SOT-23-5 package
Applications
The LP2985A-33DBVTE4 is well suited for battery-powered portable devices such as smartphones, wearables, and handheld instruments where low dropout and minimal noise are critical. It is commonly used to power sensitive analog and RF subsystems, including ADCs, PLLs, and wireless transceivers, where supply noise directly impacts signal quality. The device also finds use in IoT nodes and industrial sensor modules that require a stable 3.3V rail derived from a lithium-ion or multi-cell battery.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.575V |
| Dropout Voltage1-Nom | 0.28V |
| Input Voltage Absolute-Max | 16V |
| Input Voltage-Max | 16V |
| Input Voltage-Min | 3.9905V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.0123552% |
| Load Regulation-Max | 0.1155% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.15A |
| Output Voltage1-Max | 3.4155V |
| Output Voltage1-Min | 3.1845V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Packing Method | TR, 7 INCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Finish | Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Tolerance-Max | 3.5% |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Philippines |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LP2985A-33DBVTE4:
Frequently Asked Questions
What is the dropout voltage of the LP2985A-33DBVTE4 at full load?
The LP2985A-33DBVTE4 has a typical dropout voltage of 280mV and a maximum of 575mV at the full 150mA output current. This low dropout characteristic allows the regulator to maintain a stable 3.3V output even when the input supply drops to as low as approximately 3.88V under typical conditions.
What is the output noise of the LP2985A-33DBVTE4 and why does it matter?
The LP2985A-33DBVTE4 features an ultra-low output noise of 75µV RMS over the 10Hz to 100kHz bandwidth. This is critical in applications powering RF components, precision ADCs, or PLLs, where power supply noise directly degrades signal integrity, phase noise, and conversion accuracy.
How does the shutdown pin work on the LP2985A-33DBVTE4?
The shutdown pin (EN) allows the regulator to be disabled by pulling it to a logic-low level, reducing quiescent current to under 1µA. This makes it ideal for power sequencing in multi-rail systems and for extending battery life in portable applications by completely cutting power to inactive subsystems.
What package does the LP2985A-33DBVTE4 come in and what are alternatives?
The LP2985A-33DBVTE4 is housed in a 5-pin SOT-23 (SOT-23-5) package, making it suitable for space-constrained PCB designs. Functional alternatives with similar 3.3V/150mA LDO characteristics include the TLV70033 and XC6206P332MR, though designers should verify dropout voltage, noise, and enable logic compatibility before substituting.
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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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