LTC3859IFE#TRPBF

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The LTC3859IFE#TRPBF is a DC/DC switching controller from Linear Technology Corporation (LTC). It is designed to supply multiple outputs from the same voltage source. It is part of the Power Management IC (PMIC) product family and class of Voltage Regulators – DC DC Switching Controllers. This device is an ideal fit for applications that require multiple on-board power rail voltages such as various computing and networking systems, data communication, and industrial control systems.

The LTC3859IFE#TRPBF features an integrated error amplifier, low-side MOSFET, and high-side MOSFET. It supports Synchronous Rectification, Operating Frequency Synchronization, and Burst Mode operation. It has a programmable current limit and current limit foldback. It also has an integrated voltage drop compensator, output voltage Voltage and Temperature Tracking, and an adjustable Soft-start. Input supply range is wide at 3.4V to 38V.

The LTC3859IFE#TRPBF also provides a low-ripple Burst ModeTM operation to reduce power losses at high efficiency in light load conditions, as well as Quasi-Resonant Synchronous Rectification for low output voltage ripple. The Synchronous Rectification feature reduces power loss and improves the efficiency of the overall solution. The LTC3859IFE#TRPBF includes an integrated RF Input Noise Filter and an integrated loop compensation system. The device also offers programmable cycle-by-cycle current limit and over-voltage protection features.

The LTC3859IFE#TRPBF operates a current-mode PWM controller to regulate the output voltage. It sets the power converter\'s built-in MOSFET switching frequency. It also sets the minimum on-time, which must be equal to or greater than the current-mode PWM controller\'s minimum on-time. It also sets the maximum duty cycle. This is done to limit the maximum power dissipation of the device.

Internally, the LTC3859IFE#TRPBF provides soft-start, programmable frequency synchronization, current limit and foldback, output voltage tracking and temperature tracking, as well as over-current and short-circuit protection. The integrated error amplifier accelerates the loop dynamics and compensates for voltage drops across the MOSFETs. The integrated low-side and high-side MOSFETs reduce external component count responsible for switching losses.

The LTC3859IFE#TRPBF is a powerful DC/DC switching controller that provides high efficiency, low noise, and fast transient response while reducing overall solution costs. It is an ideal choice for multi-rail power supplies used in computing and communications, data communication and industrial control applications.

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