MIC5305-1.8BD5-TR

Current - Output:	150mA
Base Part Number:	MIC5305
Supplier Device Package:	TSOT-23-5
Package / Case:	SOT-23-5 Thin, TSOT-23-5
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	85dB ~ 65dB (1kHz ~ 10kHz)
Current - Quiescent (Iq):	150µA
Series:	--
Voltage Dropout (Max):	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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MIC5305-1.8BD5-TR Applications and Working Principle

Introduction

The MIC5305-1.8BD5-TR is a low dropout linear regulator (LDO) manufactured by Micrel, Inc. It is a high-performance and cost-effective alternative to standard LDO solutions, providing excellent load and line transient response performance with a low quiescent current and 800mA of continuous output current. This LDO is ideal for use in power-sensitive applications such as industrial, automotive, and telecom.

Features and Specifications

The main features of the MIC5305-1.8BD5-TR include an integrated MOSFET for increased efficiency, low dropout for improved output noise, and low quiescent current for improved power savings. Additionally, it features over-current, over-temperature, and reverse-current protection. The key specifications of this LDO are:• Voltage Range: 1.5V to 8.0V• Output Voltage Accuracy: ±1%• Dropout Voltage: 150mV at 800mA• Quiescent Current: 40μA• Output Current: 800mA• Load Transient Response: 10mV @ 500mA• Operating Temperature: -40°C to 125°C• Package: Small SOT23-5

Application

The MIC5305-1.8BD5-TR is suitable for a wide variety of applications including linear regulators, battery management systems, audio and visual systems, industrial, automotive, and telecom. It is particularly useful for applications that require a high-performance LDO with a low quiescent current and 800mA of continuous output current.

Working Principle

The MIC5305-1.8BD5-TR is a linear regulator that uses a PNP/NPN bipolar transistor pair and an integrated PMOSFET to regulate its output voltage. The input voltage is applied to the base of the PNP transistor, while the output voltage is applied to the base of the NPN transistor. The two transistors form an emitter follower configuration, and the current flowing through the emitter of the NPN transistor is regulated by the PMOSFET. The current through the output stage is limited by the current-limiting circuit, which monitors the voltage across the resistor and adjusts the voltage at the gate of the PMOSFET accordingly. Additionally, the MIC5305-1.8BD5-TR offers over-current, over-temperature, and reverse-current protection to ensure safe operation.

Conclusion

The MIC5305-1.8BD5-TR is a cost-effective and reliable linear regulator from Micrel, Inc. It offers high performance with a low quiescent current, 800mA of continuous output current, and outstanding load and line transient response performance. Additionally, it provides several protection features to ensure safe operation. The MIC5305-1.8BD5-TR is suitable for a wide range of applications, including linear regulators, battery management systems, audio and visual systems, industrial, automotive, and telecom.

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