L6985FTR

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The L6985FTR is a monolithic synchronous step-down High Output Current Switching Regulator. It is part of a family of DC/DC switching regulators from STMicroelectronics. Its main application field is in the power management of portable systems, supplying up to 5A of load current with a wide input voltage range of 4.5V to 40V.

The L6985FTR is also part of a range of multi-output switching regulators, and is a four-channel device – each channel being capable of driving up to 1.6A continuous. It offers a scalable solution for efficient power supply, allowing the power management of a wide range of voltages and currents. Some of its features include an integrated low drop-out regulator and programmable power-on sequencing, real-time and temperature monitoring, and switch-on protection.

The L6985FTR’s operation can be understood in terms of its block diagram, which shows the individual components necessary for the operation of the device. At the heart of the device is a power switch, whose action is controlled by the switching regulator IC. The regulator IC takes in the input voltage, typically through an internal voltage divider, and regulates it to each of the four outputs, ensuring that each output never exceeds its respective set voltage. The regulator IC also monitors the load current, controlling it by adjusting the duty-cycle of the power switch.

The regulator IC also employs internal reset and protection circuitry, which helps ensure that the device is protected from conditions that could cause damage. This includes undervoltage lockout, thermal protection, over-current protection, and short-circuit protection. Furthermore, the device can also be used in parallel mode, allowing a maximum of two devices to be connected for increased current capability.

In summary, the L6985FTR is a versatile and efficient switching regulator that can be used in a variety of applications. It is specifically designed to take a wide input voltage range and convert it to four separate and programmable outputs. Its features include integrated protection, real-time monitoring and switch-on protection. Furthermore, it can also be connected in parallel to increase the total current output capability.

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