MIC37300-3.3BR Microchip Integrated Circuit (Other) In Stock
Microchip MIC37300-3.3BR is a fixed 3.3V, 3A low-dropout linear voltage regulator with a maximum 0.5V dropout and input voltage range of 4.3V to 6V, housed in a compact SPAK-3 package. It delivers stable 3.3V regulated output with low quiescent current for high-current embedded power rails. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Other
- Pin Count
- 3
- Lifecycle
- OBSOLETE
- Datasheet
- MIC37300-3.3BR Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Non-compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3V output with 3A continuous current capability for high-current embedded processor and memory power rails
- Low dropout voltage of 0.3V typical (0.5V maximum) enabling regulation from a 4.3V input supply
- Wide input voltage range of 4.3V to 6V accommodating USB, Li-ion, and 5V regulated supply inputs
- Compact SPAK-3 surface-mount package minimizing board area for space-constrained power supply designs
Applications
The MIC37300-3.3BR is used to generate stable 3.3V power rails for microprocessors, FPGAs, and memory arrays in embedded systems drawing up to 3A of continuous current. Its low 0.3V typical dropout voltage makes it effective in USB-powered designs where the 5V input may sag to 4.3V under load, maintaining clean 3.3V regulation throughout. The SPAK-3 package integrates into compact power management sections on single-board computers, wireless modules, and industrial control boards.
Specifications
| Reach Compliance Code | Not Compliant |
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.5V |
| Dropout Voltage1-Nom | 0.3V |
| Input Voltage Absolute-Max | 6.5V |
| Input Voltage-Max | 6V |
| Input Voltage-Min | 4.3V |
| JESD-30 Code | R-PSSO-G3 |
| JESD-609 Code | e0 |
| Line Regulation-Max | 0.0165% |
| Load Regulation-Max | 0.033% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 3A |
| Output Voltage1-Max | 3.366V |
| Output Voltage1-Min | 3.234V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SMSIP3H,.41TB |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 240 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | Tin/Lead (Sn80Pb20) |
| Terminal Form | GULL WING |
| Terminal Pitch | 2.54mm |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Tolerance-Max | 2% |
| ## MIC37300-3.3BR Alternates Showing results | Image |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Non-compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MIC37300-3.3BR:
suggested
suggested
suggested
suggested
Frequently Asked Questions
What output voltage and maximum current does MIC37300-3.3BR supply?
The MIC37300-3.3BR provides a fixed 3.3V regulated output with a maximum continuous load current of 3A. This output is sufficient to power high-current loads such as application processors, wireless SoCs, DDR memory banks, and multiple peripheral ICs simultaneously on a single 3.3V power rail.
What is the dropout voltage of MIC37300-3.3BR and why does it matter for USB-powered designs?
The typical dropout voltage is 0.3V with a maximum of 0.5V. In USB-powered systems where the 5V bus can drop to 4.3V under heavy current draw, a 0.5V maximum dropout allows the MIC37300-3.3BR to continue regulating 3.3V output even at the minimum specified input, providing a 0.5V to 0.7V input-to-output headroom margin that maintains regulation stability across the full load range up to 3A.
Which input supply sources are compatible with MIC37300-3.3BR's voltage range?
The MIC37300-3.3BR accepts input voltages from 4.3V minimum to 6V maximum (with an absolute maximum of 6.5V). This range is compatible with USB 5V bus power, single-cell lithium-ion batteries at full charge (approximately 4.2V), regulated 5V supplies, and 4-cell NiMH battery packs at nominal 4.8V, covering most portable and embedded system power source scenarios.
How does MIC37300-3.3BR compare to a switching regulator for powering a 3.3V, 3A embedded rail?
MIC37300-3.3BR is a linear LDO regulator, so it dissipates the input-to-output voltage difference multiplied by load current as heat — at 5V input and 3A load, this is approximately (5V - 3.3V) x 3A = 5.1W. A switching Buck converter at the same operating point would dissipate less than 0.5W at 90% efficiency. The LDO is preferred when board area, noise sensitivity, or design simplicity outweigh efficiency, and when the input voltage remains close to 4.3V to minimize thermal dissipation.
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