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MIC37100-3.3WS-TR

MCHPMIC37100-3.3WS-TR

Microchip Technology
Linear Voltage Regulator IC Positive Fixed 1 Output 1A SOT-223-3
Active9,663 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The MIC37100-3.3WS-TR is a high-performance, low-dropout (LDO) linear voltage regulator designed for 3.3V fixed output applications. It provides up to 1A of output current with a maximum dropout voltage of 0.5V, making it suitable for converting low input voltages to stable 3.3V rails. The device is housed in a compact SOT-223-3 package and features internal thermal and current limit protection.

Why Choose This Part

This regulator offers a very low dropout voltage of 0.5V at a full 1A load, which minimizes power dissipation and heat. It is designed with uCap technology, allowing it to maintain stability with small ceramic output capacitors. The wide operating temperature range of -40 to +125 degrees Celsius ensures reliability in demanding thermal environments.

Applications

Microprocessor Core Logic
Provides a clean 3.3V rail for digital logic and microprocessor cores requiring up to 1A of current.
Post-Regulator for Switching Supplies
Filters high-frequency noise from switching DC-DC converters to provide a quiet power source for sensitive analog circuits.
High-Efficiency Battery-Powered Systems
Utilizes low dropout characteristics to maximize battery life by operating as the input voltage approaches 3.3V.

Key Specifications

Output Type Fixed
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
Current - Output 1A
Protection Features Over Current, Over Temperature
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 6V
Voltage Dropout (Max) 0.5V @ 1A
Supplier Device Package SOT-223-3
Voltage - Output (Min/Fixed) 3.3V

Getting Started

To implement this part, place a minimum 10uF ceramic capacitor close to the output pin for stability. Ensure the input voltage does not exceed the 6V maximum limit. Thermal management is critical at high current; calculate the junction temperature based on the SOT-223 package thermal resistance and your expected power dissipation (Vin - Vout) * Iout.

Also Consider

LM1117MPX-3.3/NOPB TITexas Instruments - An industry-standard alternative, though it typically has a higher dropout voltage than the MIC37100.
AP2114H-3.3TRG1 DIODiodes Incorporated - A cost-effective 1A LDO in a SOT-223 package with similar dropout specifications.
AZ1117CH-3.3TRG1 DIODiodes Incorporated - Suitable for applications where a higher input voltage rating is required, as it supports up to 15V.

Categories

Power Management > LDO Voltage Regulators
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