LTC3124EFE#TRPBF

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LTC3124EFE#TRPBF Application Field and Working Principle

PMIC - Voltage Regulators - DC DC Switching Regulators can be integrated into a wide variety of applications, such as portable low power equipment, computing, industrial, automotive, and medical. The LTC3124EFE#TRPBF is rated for a 3 A load current and has a wide input voltage range of 1 V to 5.5 V, making it an ideal component for a variety of embedded systems. This device is an ideal choice for lower power designs, as it features an integrated power switch, low quiescent current, and an ultra-low-power shutdown mode. Additionally, the LTC3124EFE#TRPBF has an extensive set of features including adjustable output voltage, thermal overload protection, and is available in a small 3mm × 3mm DFN package.

The working principle of the LTC3124EFE#TRPBF is based on switch-mode DC/DC conversion. This is achievable by rapidly switching a switched-mode power supply (SMPS) transistor between on and off states. The voltage regulator’s on-state is the conduction cycle and the off-state is the rest period. During the conduction cycle, the transistor conducting voltage (Vin to Vout) decreases from the input voltage to the output voltage, dissipating a finite power. As the transistor conducting time (ton) decreases, the power delivered to the load decreases.

The LTC3124EFE#TRPBF is a high-efficiency, synchronous step-down DC/DC regulator that features a 68 mΩ integrated power switch, adjustable output voltage range from 0.51 V to 5.5 V, and Dual Input Operation for higher availability. It has an input voltage range of 1 V to 5.5 V, which makes it a suitable choice for a variety of embedded and portable system applications.

This device also includes an adjustable minimum on-time to ensure that the inductor current is regulated to eliminate leading edge current limit spikes. An active current-limit circuit provides over current protection with a programmable foldback feature. An external resistor provides thermal overload protection.

An adjustable Soft-Start circuit sets the output voltage in a smooth and controlled manner, reducing output voltage overshoot. Output voltage sequencing allows multiple LTC3124EFE#TRPBF power supplies to be connected in parallel to evenly share loads or for different output voltages to be obtained from a single input source. An available configurable output voltage ratio also allows for creative power supply designs.

The LTC3124EFE#TRPBF integrates internal MOSFETs and a 2 A LDO Ideal Diode that eliminate external components and minimize board space. An integrated logic-level compatibility feature also allows the device to be interfaced directly to 3.3 V and 5 V microcontrollers.

The device operates off of a 0.8 V to 5.5 V input supply, and can regulate an output voltage as low as 0.51 V. The device is available in the 3mm × 3mm DFN-14 and SOT-23-14 packages. The IC features a low standby current of 1.5 μA, and excels in providing high load current and high efficiency.

By leveraging its features, the LTC3124EFE#TRPBF is an ideal choice for a variety of applications, such as ultra-low power projectors, medical pumps, meter reads, and sensors. For this reason, it is a preferred choice for low power and portable embedded systems in general.

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