Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Power Management
Battery Chemistry:	Multi-Chemistry
Number of Cells:	1
Fault Protection:	Over Current, Over Temperature, Reverse Battery, Reverse Current
Interface:	--
Operating Temperature:	0°C ~ 125°C (TJ)
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	16-SOIC
Base Part Number:	LT1579

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Introduction to LT1579CS#TRPBF Battery Management PMIC

The LT1579C series of load switch integrated circuits (PMICs) from Linear Technology are specifically designed for use in battery management systems and feature power savings, high efficiency and improved reliability. The LT1579CS#TRPBF is a low-side switching device designed to interface with battery packs and fuel gauges. It is a 3-port, 4-switch controller with built-in UVLO, thermal shutdown and overcurrent protection.

Application Field

The LT1579CS#TRPBF is ideal for battery-powered systems such as in mobile phones and other portable devices, as well as in automotive, computing, networking and consumer applications. It features a low quiescent current and a high efficiency level, resulting in a minimum battery life extension. Because of its high switching efficiency and low turn-on voltage (VON), the LT1579CS#TRPBF is suitable for battery management systems over a wide voltage range (1V to 10V). Its tight on-resistance tolerance of 0.2% ensures accurate and consistent current-sensing and load-switching.

Working Principle and Features

The LT1579CS#TRPBF consists of four internally fixed-on switches, two low side switches (LS1 and LS2) with integrated current sense resistors, and one high side switch (HS1). The fourth switch, HS2, is an enable pin, which acts as an enable pin and allows fast charging. This enable pin also acts as a battery-level indicator, providing an open-drain output to indicate the charger status.The LT1579CS#TRPBF offers a wide operating temperature range of -40°C to +125°C, and its low quiescent current and high switching efficiency provide improved battery life. Its tight on-resistance tolerance of 0.2% ensures accurate and consistent current sensing and switching, while its adjustable overload current limit feature allows the circuit to limit current within a specified range for better device protection. Furthermore, its additional fault protection features, such as UVLO, thermal shutdown and overcurrent protection, help the device minimize the risk of system malfunction, so that power supplies and battery packs can be safely used and maintained.

Conclusion

The LT1579CS#TRPBF from Linear Technology is a low-side load switch PMIC specifically designed for use in battery management systems. It offers low quiescent current, high switching efficiency and wide operating temperature range, as well as adjustable overload current limiting, fault protection features and built-in UVLO, thermal shutdown and overcurrent protection. These features make the LT1579CS#TRPBF an ideal choice for battery-powered systems, automotive applications, computing, consumer goods and other applications.

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