LTC3890HGN-1#TRPBF

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The LTC3890HGN-1#TRPBF is a high performance synchronous current-mode step-down DC/DC switching controller, which is a part of the massive collections of the Polymer Multi-Layer Ceramic (MLCC) voltage regulator product line from Linear Technology. It provides precise constant current frequency control and excellent voltage accuracy. The device is designed to operate from −40°C to +125°C junction temperature range, making it suitable for many applications in automotive, industrial and medical market spaces.

The LTC3890HGN-1#TRPBF offers high switching frequency accuracy, load line tracking over load current, and precise regulation of output voltage across wide output voltage ranges. It includes key features such as a wide operating voltage range for improved efficiency and thermal performance, full cycle-by-cycle current limit protection, and programmable slew-rate control for further improving system efficiency and transient performance.

The LTC3890HGN-1#TRPBF is a great choice for automotive, industrial, medical and other applications that require constant current, precision voltage control, and excellent transient response. It is suitable to use in a power converter topology where the output voltage is adjustable over a wide input voltage range. It is also an ideal choice for applications that require high efficiency and low temperatures.

The main application fields of the LTC3890HGN-1#TRPBF includes Point-of-Load (POL) converter, Dual Output DC/DC converters, Point-of-Load regulator, Point-of-Load converter module, Step-Down DC/DC converter, and High-Voltage Step-Down DC/DC converter. It can also be used in a wide range of other applications such as power supply, battery charger, UPS systems, constant current LED drivers and automotive auxiliary circuits.

The working principle of the LTC3890HGN-1#TRPBF is based on the synchronous buck architecture, which has a high efficiency capable of providing fast transient and good EMI. It uses voltage mode current-mode control for enhanced efficiency over a wide load range. A small ceramic capacitors on the hysteretic EN and CLK pin generates the clock and enable signals, which provides stable feedback loop control even with rapid load transients. Its current sensing circuit is capable of sensing output current up to 5A with an external resistor in the current sense path.

The LTC3890HGN-1#TRPBF also includes a low-noise programmable gain error amplifier with zero-drift, which allows the loop compensation to be optimized with the help of a low-noise feedback network. The error amplifier also includes an adjustable gain DC voltage adjust pin, which provides a 24-bit linear adjustment of the output voltage. The device has a thermal shutdown protection and programmable soft-start time feature, ensuring protection against thermal overloads. The device also has a fault output pin that provides an open-drain output for reporting faults from the fault condition detect circuitry.

In conclusion, the LTC3890HGN-1#TRPBF is a high performance synchronous current-mode step-down DC/DC switching controller from Linear Technologies. It features excellent voltage accuracy, high switching frequency accuracy and programmable slew-rate control for reducing power losses. It is suitable for many applications such as Battery charger, UPS systems, and constant current LED drivers. Its main application fields includes Point-of-Load (POL) converter, Dual Output DC/DC converters, Point-of-Load regulator, Point-of-Load converter module, Step-Down DC/DC converter, and High-Voltage Step-Down DC/DC converter.

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