MP8666DN-LF-Z

Voltage - Supply (Vcc/Vdd):	4.5 V ~ 21 V
Supplier Device Package:	8-SOIC-EP
Package / Case:	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	No
Duty Cycle (Max):	90%
Frequency - Switching:	600kHz
Series:	--
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Not For New Designs
Packaging:	Tape & Reel (TR)

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MP8666DN-LF-Z Application Field and Working Principle

Introduction

The MP8666DN-LF-Z is a high-performance DC/DC switching controller chip designed and manufactured by Monolithic Power Systems. This low-voltage integrated circuit, also known as DC-to-DC converter, can be used to regulate the output voltage from a lithium-ion battery. The part number of the chip is MP8666DN-LF-Z and it is classified under the PMIC (Power Management Integrated Circuits) family of products as a Voltage Regulator (Switching Controller).

Features

The MP8666DN-LF-Z has many desirable features. Firstly, it can be used to provide adjustable power and current control with a 0 - 5 V control input. The fixed (no adjust) output voltage is 4.5 V, and a wide input voltage range of 9 - 25 V. The output power capability is up to 3 W, with an efficiency of over 90%. The MP8666DN-LF-Z also has an internal 5 V bias voltage. The switching frequency is adjustable and has a frequency range of 150 – 510 kHz. It also has protection features that include output overload protection and an over-temperature shutdown protection.

Application Fields

The MP8666DN-LF-Z is a high-performance DC/DC switching controller that can be used in a variety of applications. These include mobile computing, digital audio, automotive, consumer, and industrial applications. It is particularly valuable for powering digital components, such as AM/FM receivers, CD players, and digital displays. It can be used for any device that requires a consistent, reliable power supply, such as a laptop computer or portable device.

Working Principle

The working principle behind the MP8666DN-LF-Z is quite simple. When power is supplied to the controller, it begins by analyzing the input voltage and adjusting it accordingly by either increasing or decreasing the output. The controller then quietly pulses on and off in order to regulate the output voltage to the desired level. The output voltage can be further adjusted by using an external voltage reference, or trim control. This allows the user to set the desired output voltage and power of the device without having to make adjustments every time the input voltage changes.

Conclusion

The MP8666DN-LF-Z is a high-performance DC/DC switching controller chip offering adjustable output voltage, high efficiency, and excellent protection features. It is suitable for a variety of applications, including mobile computing, digital audio, automotive, consumer, and industrial applications. The working principle behind the MP8666DN-LF-Z is quite straightforward and involves regulating the output voltage by either increasing or decreasing it according to the input voltage. The output voltage can also be further adjusted with an external voltage reference or trim control.

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