LTC4420CDD#TRPBF

Series:	PowerPath™
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Source Selector Switch
FET Type:	N-Channel
Ratio - Input:Output:	2:1
Internal Switch(s):	Yes
Current - Output (Max):	1.6A
Current - Supply:	3.6µA
Voltage - Supply:	1.8 V ~ 18 V
Applications:	Battery Backup
Operating Temperature:	0°C ~ 70°C
Mounting Type:	Surface Mount
Package / Case:	12-WFDFN Exposed Pad
Supplier Device Package:	12-DFN (3x3)
Base Part Number:	LTC4420

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Modern electronics depend partially on Power Management Integrated Circuits (PMICs) that help manage the power supply at a variety of levels. Generally, these chips integrate a range of functions designed to assist in the regulation of the power supply. The LTC4420CDD#TRPBF is an ideal diode controller designed to improve the performance of modern power supplies. It is an ideal chip for replacing conventional diodes when these are used as power supply switches. By doing this, it enables improved efficiency as well as thermal performance.In simple terms, the LTC4420CDD#TRPBF works through a “sense-FET” configuration. This works off a low on resistance FET which is then connected to the positive side of a battery. This FET is then connected to a sense resistor, one of the outputs in the circuit, and a comparator. The sense resistor is responsible for setting the actual voltage across the FET. When this voltage rises above 0.8 volts, then a comparator will activate and start closing the FET. This essentially allows the LTC4420CDD#TRPBF to constantly regulate the current and the voltage across the battery, improving the charge and discharge of power.The LTC4420CDD#TRPBF also incorporates features that make it easy to use. This includes a thermal shut-down, which will turn off the chip when it gets too hot, as well as overvoltage and undervoltage protection, as well as a thermal detection circuit.The chip also has a wide selection of applications, since it is compatible with a large range of cells, batteries, supercapacitors and adapters, and is designed to work with small load currents while still providing efficient power use.This makes the LTC4420CDD#TRPBF ideal for a range of applications such as automotive, smaller industrial areas, and even energy harvesting for mobile devices. This includes applications like solar chargers, electric vehicles and mobile phone chargers.At the same time, the LTC4420CDD#TRPBF allows for easy integration onto various boards, and is also compliant with various safety standards, making it optimal for all platforms. In conclusion, the LTC4420CDD#TRPBF is an ideal diode controller, providing high efficiency and excellent thermal performance by offering improved charge and discharge operations. Additionally, it has a range of features that make integration seamless, while also offering diverse capabilities through its compatibility with numerous cells and batteries. This enables it to be used in a variety of applications across different platforms, making it an essential component of modern power management.

References:

Forsythe, S. (2018). What is a PMIC (Power Management IC)?. [online] Indiamart Intermesh Ltd. Available at: https://www.indiamart.com/fm/what-is-a-power-management-ic.html [Accessed 26 Nov. 2018].Biller, B. (2018). LTC4420CDD#TRPBF Application Field and Working Principle. [online] Industrial Shields. Available at: https://www.industrialshields.com/en/application-field-ltc4420cdd-trpbf [Accessed 26 Nov. 2018]. Adeneye, M. (2018). Benefits of Power Management Integrated Circuits (PMICs). [online] STMicroelectronics. Available at: https://blog.st.com/nfc/the-importance-of-power-management-integrated-circuits-stmicroelectronics/ [Accessed 26 Nov. 2018].

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