LTC3624IMSE-25#TRPBF

The LTC3624IMSE-25#TRPBF is an active current-mode synchronous step down DC-DC switching regulator IC with dual outputs. It offers many features and benefits, including high efficiency, wide input voltage range, high operating frequency, low noise and low output voltage ripple, and adjustable output voltage. It is suitable for applications such as automotive, laptop computer and telecom power supplies, workstation and server power supplies, portable electronic devices, and Li-ion and Li-polymer battery chargers. This article will discuss the application field and working principle of the LTC3624IMSE-25#TRPBF.

The LTC3624IMSE-25#TRPBF is a versatile step-down DC-DC switching regulator IC designed to generate two output voltages from a single input voltage source. It has an adjustable output voltage range of 0.6 V to 25 V. It offers a wide input voltage range from 3.5 V to 30 V, enabling it to be used in a variety of automotive and industrial applications. The LTC3624IMSE-25#TRPBF is capable of maintaining a high efficiency over a wide input-output voltage range while consuming an extremely low 3.3 µA standby current.

The device uses active current-mode control, which provides fast transient response and improves line and load regulation. The switching frequency can be adjusted up to 2 MHz and is synchronized to an external clock. The current limit is adjustable via an external resistor, and the UVLO threshold is adjustable through an external reference voltage. Furthermore, the LTC3624IMSE-25#TRPBF features a small solution size, incorporating both drivers and MOSFETs in a single, compact package for high-frequency, low-noise operation.

Working Principle

The LTC3624IMSE-25#TRPBF utilizes an active current-mode control scheme. The PWM signal from the control circuit sets the current on/off time of the power switch MOSFET. The inductor current ramp is compared with the reference current ramp and the result is fed back to the error amplifier. If the inductor current becomes larger than the reference current, the amplifier increases the power switch MOSFET turn-on time, which results in a decrease in the inductor current. The output voltage is regulated by modulating the power switch duty cycle.

The LTC3624IMSE-25#TRPBF also features a PFM (Power Factor Modulation) mode, which enables it to operate under light load conditions. During light load, the device will control the output voltage using pulse skipping or pulse frequency modulation. This helps to reduce the overall power consumption and improve efficiency under light load conditions.

Applications

Due to its many features, the LTC3624IMSE-25#TRPBF is suitable for use in many automotive, industrial and consumer applications. Its fast transient response, wide input voltage range and low noise operation make it ideal for use in automotive and industrial power supplies. Its adjustable output voltage and low standby current consumption make it suitable for use in laptop computer and telecom power supplies, workstation and server power supplies, and Li-ion and Li-polymer battery chargers. Additionally, its small solution size makes it ideal for use in portable electronic devices where space may be limited.

In conclusion, the LTC3624IMSE-25#TRPBF is a versatile and reliable step-down DC-DC switching regulator IC. It utilizes an active current-mode control scheme to provide fast transient response and improve line and load regulation. It offers a wide input voltage range and low noise operation for use in automotive, industrial and consumer applications. Its adjustable output voltage, low standby current consumption and small solution size make it suitable for use in laptop computer and telecom power supplies, workstation and server power supplies, and Li-ion and Li-polymer battery chargers.