MIC37150-1.8BR

Voltage Dropout (Max):	0.5V @ 1.5A
Base Part Number:	MIC37150-1.8
Supplier Device Package:	S-PAK-3
Package / Case:	Spak-3 (3 Leads + Tab)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Control Features:	--
PSRR:	--
Current - Output:	1.5A
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	6V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The MIC37150-1.8BR is a fixed output, low dropout (LDO) linear voltage regulator manufactured by Micrel, Inc. It is designed to provide 3.3V to 1.8V at 500mA continuous output current, with an input range of 3.3V to 5.5V. It features excellent line and load regulation, low output noise, and fast transient response. The MIC37150-1.8BR is optimized for low dropout and high current applications, making it ideal for powering low power components and circuits.

Application Field

The MIC37150-1.8BR is a high performance LDO voltage regulator suitable for applications such as Set Top Boxes, PCMCIA cards, portable PC systems and USB peripherals. It is also suitable for powering digital cameras, mobile phones and handheld devices, as well as for powering FPGAs, microprocessors, and small signal circuitry.The MIC37150-1.8BR offers fast transient response and high output accuracy over wider temperature and line variations. It is available in a small 5 pin SOT-23 package, and provides excellent output accuracy even at high load currents.

Advantages

The MIC37150-1.8BR linear voltage regulator provides several important advantages for power applications. First, it features a low dropout of only 0.3V, which significantly reduces wasted power and helps to reduce heat dissipation in the system. Second, it has built-in protection features including input voltage monitoring, current limit protection, and thermal shutdown protection. This ensures that the system is protected in the event of an overload or excessive temperature. Third, it has extremely low output noise due to its low operating temperature and internal power management circuitry. Lastly, it has an extremely low quiescent current of only 1mA, which helps to extend the battery life of portable devices.

Working Principle

The MIC37150-1.8BR linear voltage regulator works on the principle of voltage regulation. It takes a certain amount of input voltage and converts it into a uniform output voltage by means of a series of circuits built into the device. The input voltage is continually monitored by the regulator and then converted into a stable DC output voltage by means of an internal feedback system.The power flow of the device is controlled by a series of MOSFETs, which, depending on the input voltage, are either opening or closing to adjust the power flow to the output. To ensure the regulation of the output voltage, a feedback loop allows the MOSFETs to adjust their switching in relation to the output voltage. This helps reduce the effects of line and load variations and helps to stabilize the output voltage.

Conclusion

The MIC37150-1.8BR is an excellent low dropout linear voltage regulator from Micrel, Inc. It provides excellent performance in a small package, with fast transient response, low output noise, and excellent line and load regulation. With its low dropout voltage, built-in protection features, and low quiescent current, it is perfect for powering digital cameras, mobile phones, and other handheld devices. Additionally, its wide input range makes it ideal for powering FPGAs, microprocessors, and other small signal circuitry.

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