LT3485EDD-0#TRPBF

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LT3485EDD-0#TRPBF is a sort of power management integrated circuits, which is classified into PMIC (power management) and specialized. It is designed to provide multiple voltage and current outputs and the manageable switches, as well as the effective protection. This device aims to provide more reliable and efficient power management solution in various levels of electronic systems.

General Description

The LT3485EDD-0#TRPBF is a high efficiency multi-output power management device. It is capable of supplying 1A of continuous output current over the wide input voltage range with minimum switching frequency of 800kHz by only limited external power components. The device includes a high side N-channel MOSFET, two low side N-channel MOSFETs and two programmable current sources to handle concurrent power requirements. This features provides lower RDS(on) and thus better efficiency in multiple output systems. The device also includes two separate outputs shared between the two low side MOSFETs for simultaneously supplying different loads with different voltages.

Key Features

• Wide input voltage range of 1.8V to 5.5V
• 2A continuous output current
• Programmable current sources
• High side N-channel MOSFET
• Two low side N-channel MOSFETs
• Frequency synchronization
• Programmable operation frequency (800kHz to 1MHz)
• Programmable soft start
• Operating on 4.2V to 5.5V input

Functions and Benefits

The LT3485EDD-0#TRPBF is an integrated high efficiency power management device which offers a versatile range of features and functions to optimize power delivery. The device allows for the use of just a few external components for a complete system solution. A separate regulator circuit is provided for each output and these regulators can be programmed independently. This eliminates the need for multiple power ICs, thus simplifying systems and providing an improved conversion efficiency. It also helps to reduce board area and system costs.

The device also offers synchronization between multiple supplies. This allows multiple supplies to track each other to reduce noise and ripple. The frequency of the outputs can be adjusted with a single external resistor, which can be programmed to optimize circuit performance. Furthermore, the device includes a programmable soft-start to reduce inrush current and also offers overload and over-temperature protection.

Applications

The LT3485EDD-0#TRPBF is suited for several designs including those needing a dual or single output solution. It is ideal for a number of power management applications such as portable devices, embedded systems and consumer electronics. It is also suitable for automotive, medical and industrial applications.

Working Principle

The working principle of the LT3485EDD-0#TRPBF is based on a switched mode power supply (SMPS) DC/DC converter. This device includes two main components, which are the power converter and the power switches. The power converter is responsible for the conversion of input voltage to output voltage and the power switches switch the voltage at the current outputs to maintain a constant output voltage. The frequency at which the switches are operated and the duty-cycle of the switches is adjusted to control the output voltage.

The LT3485EDD-0#TRPBF can be used to step down input voltage to a lower voltage level by switching between two different voltage levels. The switch mode is governed by a PWM controller. This controller monitors the input and output voltages and adjusts the duty cycle of the switch accordingly to maintain desired output voltage. The frequency of the switch can be adjusted with an external resistor, which can be programmed to optimize the converter performance.

The LT3485EDD-0#TRPBF also includes two low side N-channel MOSFETs and two programmable current sources. The low side MOSFETs reduce RDS(on) and thereby improve the efficiency of the converter. The programmable current sources provide additional flexibility when multiple outputs are required.

Conclusion

The LT3485EDD-0#TRPBF is a power management device designed to provide multiple voltage and current outputs and the manageable switches. It is a high efficiency multi-output power management device with a wide input voltage range of 1.8V to 5.5V and 2A of continuous output current. The device includes a high side N-channel MOSFET, two low side N-channel MOSFETs and two programmable current sources. It is suited for several designs including those needing a dual or single output solution and can be used for a number of applications such as portable devices, embedded systems, consumer electronics, automotive, medical and industrial.

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