LT3645EMSE#TRPBF

LT3645EMSE#TRPBF Application Field and Working Principle

The LT3645EMSE#TRPBF is an advanced power management IC (PMIC), providing an integrated and efficient power-supply solution for applications powered by selectable adapters or battery. Ideal for applications such as personal electronics, portable products, set-top boxes, and other systems requiring flexible power supply, the LT3645 combines multiple linear and switching regulators and a range of features that enable optimized system performance. It is suited for synchronous buck- and boost-converter applications, as well as linear regulators, and is categorized in the PMIC voltage regulators linear + switching style.

The LT3645EMSE#TRPBF includes a boost converter and two buck converters that provide output voltages regulated to within 1.3%. In addition, it includes two adjustable low drop-out (LDO) linear regulators, which feature an enable input, allowing them to be independently enabled and disabled as needed by the system. It also includes two configurable reset timers which may be used to detect system errors and conditionally reset the device.

The LT3645EMSE#TRPBF features adaptive automatic fuse protection, providing protection against overcurrent and short-circuit conditions. Its flexible input voltage range accommodates a variety of adapters and battery inputs. An integrated power-on reset function generates a reset signal whenever the input voltage drops below the operating voltage range. The device is also temperature compensated and provides cycle-by-cycle current limit.

The LT3645EMSE#TRPBF features a step-up regulator with a rich set of features, including programmable automatic pulse-width modulation (PWM) mode frequency and voltage regulation. It is capable of delivering up to 2.5A continuous output current, and provides accurate voltage regulation. It includes an internal ripple-control loop and an external loop compensation network to minimize output voltage ripple.

The two buck converters are controlled by a two-mode control architecture, using either PWM or cycle-by-cycle peak current control. The devices also feature an integrated power stage, allowing them to be operated in constant voltage, constant current, and foldback current limit modes. The adjustable LDO linear regulators offer a low dropout voltage and current limit setting, as well as over voltage, under voltage, and over-current protection.

The LT3645EMSE#TRPBF also offers an array of features designed to optimize system reliability and performance. It features wide-threshold under voltage lockout circuit, thermal shut-down for over-temperature protection, soft start, short circuit protection, cycle-by-cycle current limit, and differential remote sensing.

Overall, the LT3645EMSE#TRPBF is an advanced PMIC specifically geared towards selectable adapter or battery powered applications. Its combination of linear and switching regulators, coupled with sophisticated protection and performance optimization features, make it ideal for a wide range of modern system applications.