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MC33275ST-5.0T3G

ONMC33275ST-5.0T3G

onsemi
Linear Voltage Regulator IC Positive Fixed 1 Output 300mA SOT-223 (TO-261)
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Overview

The MC33275ST-5.0T3G is a fixed 5.0V positive linear voltage regulator designed for applications requiring up to 300mA of output current. It features a low dropout voltage of approximately 260mV at its full rated load, making it efficient for power management in battery-operated devices. The device is housed in a compact SOT-223 package and includes integrated thermal and current limiting protection.

Why Choose This Part

This regulator offers a high Power Supply Rejection Ratio (PSRR) of 75dB at 120Hz, which is excellent for filtering input ripple. Its low ground current of 125uA helps extend battery life in standby modes. Additionally, the SOT-223 package provides a good balance between small footprint and thermal dissipation capabilities.

Applications

Battery-Powered Consumer Products
Provides a stable 5V rail for portable electronics while minimizing power loss due to low dropout characteristics.
Hand-Held Instrumentation
Ideal for precision instruments requiring a regulated 5V source with internal thermal shutdown for safety.
Imaging Equipment
Suitable for camcorders and digital cameras where board space is limited and a clean power supply is necessary.
Post-Regulation
Used for cleaning up noise from switching power supplies in sensitive analog or mixed-signal circuits.

Key Specifications

PSRR 75dB (120Hz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
Current - Output 300mA
Protection Features Over Current, Over Temperature
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 13V
Voltage Dropout (Max) 0.5V @ 300mA
Supplier Device Package SOT-223 (TO-261)
Current - Quiescent (Iq) 200 uA
Voltage - Output (Min/Fixed) 5V

Getting Started

When designing with this LDO, ensure that the input and output capacitors are placed as close as possible to the pins to maintain stability. Review the thermal resistance of the SOT-223 package against your expected power dissipation (Vin - Vout) * Iout to ensure the junction temperature stays below 125 degrees Celsius. No specialized toolchain is required beyond standard PCB design software for footprint integration.

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