LTM4622IY#PBF

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DC DC Converters

The LTM4622IY#PBF is a switching regulator from Linear Technology, a leader in the analog semiconductor industry. The design of the part is based on a synchronous buck topology and utilizes dual N-channel MOSFETs for power conversion. It is available in a thermally enhanced, 3 mm × 5 mm LQFN-48 package.

Application Field

The LTM4622IY#PBF can be used in various industrial, automotive, and consumer applications including point-of-load (POL) converters, processors, networking and Communications, automotive systems, and controllers. It is designed for applications that require high power density and low power loss. The device can achieve an efficiency of 95.4% and a no-load input current of 12 µA at 24V. It also has a wide input voltage range of 6V to 100V, making it well suited for a variety of applications with different power requirements.

Working Principle

The LTM4622IY#PBF is designed to operate using a buck topology with synchronous rectification. In this topology, the input voltage is connected to the switch node and the output voltage is taken from the inductor node. This circuit operates by having the switching transistor turn on and off based on the voltage at the switch node. When the switch transistor turns on, the current in the inductor increases, storing energy in the magnetic field. When the switch transistor turns off, the current in the inductor decreases, transferring the energy to the output capacitor.

In order to maintain a steady output voltage, the duty cycle is adjusted by a current mode control loop. The control loop senses the output voltage and adjusts the frequency of the switching transistor accordingly. The control loop is also responsible for soft starting the device, compensating for component variations, and providing protection features. Additionally, the current mode control loop can support a wide range of output capacitance and inductance values.

Conclusion

The LTM4622IY#PBF from Linear Technology is a switching regulator designed for use in point-of-load converters, processors, network and communications equipment, automotive systems, and controllers. The device features a wide range of input voltage with high efficiency and low power loss. It\'s designed using a synchronous buck topology with dual N-channel MOSFETs and current-mode control loop for regulating the output voltage. The LTM4622IY#PBF is available in a thermally enhanced, 3 mm×5 mm LQFN-48 package.

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