L9396

Series:	#6, Buchanan
Part Status:	Active
Applications:	Automotive
Current - Supply:	--
Voltage - Supply:	4.5 V ~ 19 V
Operating Temperature:	--

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## Introduction PMIC (Power Management Integrated Circuit), also known as System power IC, is a kind of multi-functional integrated device which consists of Power Management IC (PMIC) and other components. It is mainly used to provide, manage and monitor the power supply and the status of peripherals. The L9396 is a highly integrated power management device, designed especially to satisfy single-chip embedded application requirements such as smartphones, digital cameras, and PDAs. ## Features The L9396 support external power supplies, buck and boost regulators, SenseFET topology current limiters, buck regulators, charge pumps, and monitoring of battery charging parameters. It integrates an Auto-select power-saving mode, low voltage logic, very low dropout (noise immunity), output ripple rejection, over-current safety control, >10kHz switching frequency, and soft-start. The L9396 include a number of power management features, increasing battery life and extending the time between charge cycles. In this regard, the device boasts a powerful dual-mode switch that is controlled by a microcontroller. The two separate supplyvoltages provide flexibility in applications requiring two separate power supplies. ## Applications The L9396 is widely used in consumer electronics such as portable multimedia players and digital cameras, as well as in the automotive industry. It has also been used in medical and test and measurement applications. It is suitable for embedded applications that require reliable operation, low power consumption, low standby power, and high efficiency. Furthermore, the L9396 is able to support extended temperature range applications, so it can provide reliable operation even in applications with extreme temperature ranges. ## Working Principle The working principle of the L9396 involves the use of two power modes: Auto select mode and Continuous Low Power mode. In the Auto select mode, the L9396 will switch to the “shorter” source when the load increases, to maximize efficiency. This is achieved by using a dynamic load switching topology, which allows for dynamic, voltage-based power allocation. The Continuous Low Power mode is an energy-saving mode, featuring low power consumption and low switching noise, which enables longer battery life. In this mode, the L9396 can switch up to two external supplies. The power sources can be either the buck or boost regulator. It is possible to switch the mode manually or through external control signals.The L9396 also supports power management features such as over-current protection, voltage monitoring, temperature monitoring, and low voltage-logic read/write pads. It can also be used with smart phone and portable multimedia player applications and provides high level performance, even under extreme temperatures. ##Conclusion The L9396 power management IC is a highly integrated device that provides efficient power management in a small form factor. It is suitable for various portable and embedded applications and is able to provide efficient and reliable performance even in high temperature conditions. Its dual power mode feature allows for dynamic selection of the best power source for optimal energy efficiency, and the integrated protection mechanisms ensure reliable operation.

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