MC33275D-2.5

Current - Output:	300mA
Base Part Number:	MC33275
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	75dB (120Hz)
Current - Quiescent (Iq):	200µA
Series:	--
Voltage Dropout (Max):	0.5V @ 300mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	13V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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Introduction to MC33275D-2.5

The MC33275D-2.5 is a linear voltage regulator integrated circuit manufactured by the On Semiconductor N.V. The linear voltage regulator is a type of voltage regulator referred to as a Positive Voltage Regulator (PVR). It is used to generate voltage rail conforming to the electrical requirements.The MC33275D-2.5 is a low-dropout (LDO) linear regulator which can provide a high-precision output voltage at low current levels which is pre-set by the output voltage trimpot. The combination of the trimpot and output capacitors, provide a very stable output voltage.

Applications

The MC33275D-2.5 is suitable for a wide range of applications, including:

• Automotive Instrumentation and ECUs
• Office and Home Entertainment Products
• PC Cards and Mobile Equipment
• Avionics and Transportation Control Systems
• Consumer Electronics Equipment
• DVR, Cable Boxes and Set Top Boxes
• Medical Systems
• Industrial Process Control, Audio, Video and Communication Systems

Features

The MC33275D-2.5 offers some key features, including:

• Low-output voltage: 0.8 V to 5.0 V
• High stability output voltage
• Low quiescent current 12 mA max.
• Very low dropout voltage: 250 mV typ.
• Excellent noise filtering
• Input voltage range: 2.5 V to 20 V
• Very tight load regulation 0.025ᴼmax.

Working Principle

The MC33275D-2.5 works on the principle of feedback that is used to keep the output voltage at a constant level. The output register retransmits the Feedback Voltage Reference (FVR) signal to the error input of the operational amplifier. When the output voltage deviates from the FVR, the operational amplifier accurately drives the control gate to regulate the output voltage.There are three types of transistors used in the MC33275D-2.5. The first type is the N-Channel MOSFET (NMOS) which act as switches. The second type is the PNP bipolar junction transistor (BJT) which act as current sources. And lastly, the P-channel MOSFETs (PMOS) which act as current sinks.The PNP BJT works as a series pass element, operating in the active region, allowing the PNP to be used as a variable current source or sink. The PMOS transistor acts as a current sink and the N-channel MOSFET acts as a switch, allowing the current flow in the regulator circuit. The PNP BJT and the PMOS are driven by the output of the operational amplifier.

Conclusion

The MC33275D-2.5 is a 3-pin low-dropout (LDO) linear regulator. It is primarily used to provide precision output voltage with a very stable output voltage. The combination of the trimpot and output capacitors, provide a very stable output voltage. It can be used for a wide range of applications, such as Automotive Instrumentation, Office and Home Entertainment, Mobile Equipment, and Consumer Electronics Equipment.The MC33275D-2.5 works on the principle of feedback that is used to keep the output voltage at a constant level. It uses the N-channel MOSFET (NMOS), PNP Bipolar Junction Transistor (BJT), and P-channel MOSFET (PMOS) to regulate the output voltage. The MC33275D-2.5 is an excellent choice for low current level linear voltage regulator applications.

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