MCP1812BT-033/LB Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
MCP1812BT-033/LB is an ultra-low quiescent current LDO linear voltage regulator from Microchip, fixed at 3.3 V output, accepting 3.9 V to 5.5 V input with 0.4 V typical dropout, housed in a tiny SC70-3 package for battery-powered designs.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- OBSOLETE
- Datasheet
- MCP1812BT-033/LB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3400(MOQ 100)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP1812BT-033/LB?
- Fixed 3.3 V output with ±2% accuracy for stable digital supply regulation
- Ultra-low quiescent current extending battery runtime in always-on IoT nodes
- 0.4 V typical dropout voltage at rated load minimizes power loss from 3.7 V Li-cell
- Input range of 3.9 V to 5.5 V suits USB, 4 × AA, and single-cell Li-ion sources
- SC70-3 package occupies less than 1 mm² of board area for ultra-compact designs
- Load regulation maximum of 0.05% ensures stable output under varying current demand
What is MCP1812BT-033/LB used for?
The MCP1812BT-033/LB is ideal for battery-powered IoT sensors and wearable devices that require a regulated 3.3 V rail from a single-cell lithium-ion or USB source, where its ultra-low quiescent current maximizes standby time. Wireless modules, Bluetooth Low Energy SoCs, and RFID reader front-ends benefit from its stable 3.3 V output with 0.05% load regulation, ensuring consistent RF performance across supply fluctuations. Its miniature SC70-3 footprint also suits coin-cell powered data loggers and asset trackers where PCB space and power budget are tightly constrained.
What are the specifications of MCP1812BT-033/LB?
| Manufacturer Package Code | SC70-3 |
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.6V |
| Dropout Voltage1-Nom | 0.4V |
| Input Voltage Absolute-Max | 6V |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 3.9V |
| JESD-30 Code | R-PDSO-G3 |
| Load Regulation-Max | 0.05% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 85°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.3A |
| Output Voltage1-Max | 3.432V |
| Output Voltage1-Min | 3.168V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP3/6,.08 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Voltage Tolerance-Max | 4% |
| Package | SOT23 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Where can I find the MCP1812BT-033/LB datasheet?
MCP1812BT-033/LB Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP1812BT-033/LB?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the dropout voltage of the MCP1812BT-033/LB, and can it regulate from a nearly depleted Li-ion cell?
The MCP1812BT-033/LB has a typical dropout voltage of 0.4 V and a maximum of 0.6 V, meaning it maintains a regulated 3.3 V output as long as the input stays above approximately 3.9 V, which is close to the practical minimum of a single-cell Li-ion battery at end of discharge.
How does the ultra-low quiescent current of the MCP1812BT-033/LB benefit always-on IoT sensor nodes?
In always-on IoT nodes that sleep most of the time, the quiescent current drawn by the LDO during standby directly reduces battery life; the MCP1812BT-033/LB's ultra-low Iq specification keeps this idle drain minimal, extending a coin-cell or Li-ion pack's lifespan by weeks or months compared to standard LDOs drawing hundreds of µA.
What is the package size of the MCP1812BT-033/LB, and how does it compare to a standard SOT-23?
The MCP1812BT-033/LB uses the SC70-3 package, which is roughly 40% smaller in footprint than the SOT-23-3, measuring approximately 1.25 mm × 2 mm versus 1.6 mm × 2.9 mm, making it an excellent choice for space-constrained wearable PCBs and ultra-thin sensor modules.
What input voltage sources are compatible with the MCP1812BT-033/LB?
The MCP1812BT-033/LB accepts input voltages from 3.9 V to 5.5 V (absolute maximum 6 V), making it compatible with USB 5 V bus power, four alkaline AA cells in series at approximately 5 V to 6 V initial voltage, single-cell lithium-ion at 4.2 V charged, and regulated 5 V wall adapters found in consumer electronics designs.
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| 1000+ | $0.3500 | $350.00 |
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