LTC3853EUJ#TRPBF - High Performance Triple Output Synchronous Step-Down Switching Regulator

The LTC3853EUJ#TRPBF is a versatile and powerful synchronous step-down switching regulator from Linear Technology, designed to deliver high efficiency and precision in a wide range of power supply applications. This regulator features a triple output configuration, which makes it an ideal choice for systems that require multiple regulated voltages with high performance and compact size.

At the heart of the LTC3853 is a constant frequency, current mode architecture which provides excellent line and load regulation and has a wide input voltage range from 4.5V to 38V, making it suitable for a variety of input sources such as automotive batteries, industrial supplies, and more. The device's output voltage is programmable via an external resistor divider, and it can provide output voltages as low as 0.8V, which is essential for powering the latest generation of low-voltage digital ICs.

The LTC3853EUJ#TRPBF incorporates three high efficiency synchronous buck regulators with internal switches. These switches have RDS(ON) values that ensure high efficiency even at high switching frequencies, which can be programmed up to 850kHz, allowing for a smaller inductor and faster transient response. Additionally, the phase-lockable frequency (75kHz to 850kHz) allows for optimization of noise-sensitive applications.

With its powerful features, the LTC3853 also includes a range of protection functions such as overvoltage, undervoltage lockout, and overcurrent protection, which enhances the reliability and longevity of the end application. The device is available in a compact 40-lead (5mm × 5mm) QFN package, which is suitable for space-constrained applications.

Key features of the LTC3853EUJ#TRPBF include its adjustable soft-start to control the turn-on time and minimize inrush current, a power good output for each channel, and the ability to synchronize to an external clock. This makes the LTC3853EUJ#TRPBF a flexible and reliable choice for complex power systems in telecommunications, automotive, industrial, and many other high-performance electronic applications.