LTC3121EDE#TRPBF

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The LTC3121EDE#TRPBF is a high-performance, polyphase step-down DC/DC switch mode converter that utilizes a single inductor. The polyphase architecture allows the integrated switches (internal FETs) to remain on for a longer period of time in comparison to traditional single switch DC/DC converters, enabling higher efficiencies and higher output power. Additionally, the LTC3121 provides various other features that are used in modern DC/DC applications such as adjustable output voltage and operating temperature range.

The LTC3121EDE#TRPBF is a monolithic integrated circuit designed for multi-phase DC/DC converter applications supporting output voltages from 1.2V to 6V. It features two independent converter channels each with its own soft-start and output voltage adjust. Both channels can be used for dual-phase operation or for single-phase control of output voltage. The output voltage of each converter is set with a resistor divider from the VOUT1 and VOUT2 pins. Voltage feedback is achieved by connecting a sense resistor from divider output to FB pin.

With its unique blend of features, the LTC3121EDE#TRPBF is suitable for a wide range of applications, such as low-power microprocessors and low-power FPGAs, telecom boards, automotive electronics, tablets and portable consumer devices. Additionally, the device is designed to withstand both normal and hot-swap operating conditions which make it suitable for automotive systems and power supplies which require fault tolerant operation.

The LTC3121EDE#TRPBF uses a high speed current mode architecture and a synchronous rectifier topology to achieve high efficiency and low noise operation. The output voltage is regulated by comparing the voltage feedback to a reference voltage and adjusting the conduction duty cycle accordingly. The LTC3121 device also includes Peak Current Mode (PCM) control which helps to reduce the output voltage ripple, as well as over-current and short-circuit protection.

The LTC3121EDE#TRPBF features an adjustable soft-start circuit which can be set with a single external capacitor connected to the SSTART pin. The SSTART pin controls the ramp-up of the output voltage after power-up, as well as of the voltage adjustment due to the output voltage setting. The device is also designed to operate in continuous conduction mode, allowing for a constant frequency operation regardless of the load. This simplifies compensation and makes it possible to use the device with either passive or active loop compensation.

The LTC3121EDE#TRPBF is a high-performance DC/DC switching regulator suitable for a wide range of applications and comes in a compact 16-pin package. The device provides excellent load and line regulation, high-efficiency and a very low output noise, making it ideal for a variety of DC/DC power supply applications where size and efficiency are critical considerations.

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