LTC3622EDE-2#TRPBF

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DC DC switching regulators provide an efficient and reliable way to convert, regulate and adjust DC voltages from one level to a different, hence giving the source of power an extended life. The LTC3622EDE-2#TRPBF is a synchronous step-down DC/DC converter with a low quiescent current of only 295uA that can operate at up to 3A continuous output current. The input voltage ranges between 2.5V-10V and the output voltage can be adjusted between 0.6V-10V.

Overview

The LTC3622EDE-2#TRPBF is an integrated switching regulator, comprising a high-performance power management control with a high-efficiency P-channel/N-channel MOSFET switch. It is designed to provide high-efficiency, bidirectional power conversion from a single or dual-channel source. The low quiescent current makes it particularly suitable for energy harvesting and battery-powered applications, such as sensor networks and wearables. It\'s adjustable frequency of up to 3MHz allows the system designer to optimize for for light-load efficiency, minimizing the switching losses and allowing for a greater efficiency overall.

Features

• Wide Input Voltage Range from 2.5V to 10V
• Adjustable Output Voltage Range from 0.6V to 10V
• High Operating Frequency, up to 3MHz
• Low Quiescent Current of only 295uA
• Over-voltage, Under-voltage, and Over-current Protection
• Ultra-Low Standby Current with no Load Inputs
• Small Packages with HTQFN 5mmx5mm

Application Field

The key field applications for the LTC3622EDE-2#TRPBF include energy harvesting, sensor network, wearables, smart phones and PDAs, data loggers and other battery-powered electronic systems. The high efficiency and low quiescent current make it especially suitable for energy harvesting and battery-powered applications where long battery run times are required.

Working Principle

The LTC3622EDE-2#TRPBF is an synchronous-mode step-down DC/DC converter with a frequency of up to 3MHz. A voltage feedback regulator provides the power conversion and supplies a reference voltage to the error amplifier. The error amplifier compares the feedback voltage to the output of an open loop switch oscillator, whose duty cycle is modulated to maintain the desired output voltage. To reduce input voltage ripple and conversion losses, a constant-on-time control method is used. This technique of regulation maintains a constant period of time regardless of the input or output conditions.

The P-channel and N-channel MOSFETs used for the switch-mode regulator provide a low resistance current path for efficiently delivering power from input to output, with a switch duty cycle that is proportional to the current flowing. The peak switch current is limited to a desired level by a constant current-sense threshold, so the switching losses are minimized and the efficiency can be maximized.

Conclusion

The LTC3622EDE-2#TRPBF is a high-performance integrated switching regulator, ideal for a variety of applications including energy harvesting, sensor network, wearables, smart phones and PDAs, data loggers and other battery-powered electronic systems. With its adjustable frequency up to 3MHz, wide input voltage range from 2.5V to 10V, and adjustable output voltage range from 0.6V to 10V, the LTC3622EDE-2#TRPBF provides customers with an efficient and reliable way of converting, regulating and adjusting DC voltages from one level to another.

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