MCP1799T-3302H/DB Microchip Integrated Circuit (SOT223 (3-Pin)) In Stock
Microchip MCP1799T-3302H/DB is a fixed 3.3 V LDO linear voltage regulator supporting input voltages from 4.5 V to 45 V with a 0.3 V nominal dropout voltage in a SOT-223-3 package. It delivers a stable regulated output suitable for high-input-voltage industrial and automotive applications. Available in tape-and-reel packaging for automated assembly with AEC-Q100 automotive qualification.
- Manufacturer
- Microchip
- Package
- SOT223 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1799T-3302H/DB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2805(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP1799T-3302H/DB?
- Wide input voltage range from 4.5 V to 45 V enabling direct regulation from automotive 12 V and 24 V bus rails
- Low 0.3 V nominal dropout voltage maximizes output current headroom while minimizing power dissipation
- SOT-223-3 package with exposed tab provides efficient thermal conduction for higher continuous output current
What is MCP1799T-3302H/DB used for?
The MCP1799T-3302H/DB is designed for industrial and automotive systems that require a stable 3.3 V regulated supply from high-voltage input rails up to 45 V. It is well-suited for powering microcontrollers, CAN transceivers, and sensor interfaces in automotive ECUs, industrial PLCs, and 24 V field device transmitters where the input bus voltage varies widely. Its wide input range eliminates the need for a pre-regulator stage, reducing BOM complexity and improving power conversion efficiency in cost-sensitive designs.
What are the specifications of MCP1799T-3302H/DB?
| Manufacturer Package Code | SOT-223-3 |
| Factory Lead Time | 17Weeks |
| Date Of Intro | 2019-09-06 |
| YTEOL | 19 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 1.1V |
| Dropout Voltage1-Nom | 0.3V |
| Input Voltage Absolute-Max | 66V |
| Input Voltage-Max | 45V |
| Input Voltage-Min | 4.5V |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.066825% |
| Load Regulation-Max | 0.0264% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 150°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.08A |
| Output Voltage1-Max | 3.366V |
| Output Voltage1-Min | 3.234V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOT-223 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE |
| Packing Method | TR |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 2.3mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 2% |
| ## MCP1799T-3302H/DB Alternates Showing results | Image |
| Package | SOT223 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Taiwan, Thailand |
Where can I find the MCP1799T-3302H/DB datasheet?
MCP1799T-3302H/DB Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP1799T-3302H/DB?
Compatible alternatives and drop-in replacements for MCP1799T-3302H/DB:
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Frequently Asked Questions
What input voltage range does the MCP1799T-3302H/DB accept, and does it support automotive 12 V and 24 V bus rails?
The MCP1799T-3302H/DB operates from 4.5 V to 45 V input, with an absolute maximum of 66 V. This range covers both 12 V and 24 V automotive battery buses as well as industrial 24 V supply rails, making it a single-device solution for diverse system voltages without additional series regulation stages.
What is the dropout voltage of the MCP1799T-3302H/DB, and how does it affect output current capability?
The MCP1799T-3302H/DB has a nominal dropout voltage of 0.3 V and a maximum of 1.1 V at full load. The low 0.3 V typical dropout means the device can maintain a 3.3 V output even when the input supply drops to approximately 3.6 V during load transients, sustaining regulation during battery voltage dips in 4 V to 5 V powered systems.
Does the SOT-223-3 package of MCP1799T-3302H/DB support adequate thermal dissipation for higher output current applications?
Yes, the SOT-223-3 package includes a large exposed tab on the back that acts as a heatspreader, conducting junction heat directly to the PCB copper pour. With a suitable ground copper area of at least 1 cm² on a 2-layer PCB, the MCP1799T-3302H/DB can sustain continuous output currents sufficient for powering 3.3 V microcontroller subsystems in ambient temperatures up to 85°C.
For what reason would an engineer choose MCP1799T-3302H/DB over a lower-voltage LDO in a 24 V industrial transmitter design?
In a 24 V industrial 4-20 mA transmitter, using a standard 5 V-input LDO would require an additional pre-regulator to step down the 24 V bus, adding cost and board area. The MCP1799T-3302H/DB accepts 4.5 V to 45 V directly, so it eliminates the pre-regulator, reduces BOM by at least 2 components, and simplifies the power tree from 24 V bus to the 3.3 V microcontroller rail in a single conversion stage.
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| Qty. | Unit Price | Ext. Price |
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| 1+ | $0.4200 | $0.42 |
| 100+ | $0.3200 | $32.00 |
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