LTC7138EMSE#TRPBF

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The LTC7138EMSE#TRPBF is a versatile DC-to-DC switching regulator designed for applications requiring high efficiency and low power consumption. It is capable of operating from a single supply between 2.7V and 5.5V and delivering up to 800mA continuous current with up to 95% efficiency. The device features a super-low quiescent current of 2mA, making it the ideal choice for applications where battery life is critical. The LTC7138EMSE#TRPBF can also be used in applications requiring high power density, as it requires only 1.2mm2 of PCB area. The device is also highly configurable, with adjustable current limit, extended/limited frequency range, and adjustable switching frequency.

The LTC7138EMSE#TRPBF is a fixed frequency, step-down switch-mode regulator that operates from an input of 2.7V to 5.5V and delivers a regulated output of 0.6V to 5.5V. The output voltage is set with three external resistors. The device provides high efficiency, up to 95%, and low output ripple of less than 10mV typical. It also features current limit and thermal shutdown for protection against overload and overheating. The device also has built-in soft-start and adjustable switching frequency.

The LTC7138EMSE#TRPBF is designed for applications such as high-efficiency point-of-load DC/DC converters, step-down DC/DC switching supplies, battery-powered systems, and POL (point of load) regulators. It is ideal for use in portable electronics, communications equipment, instrumentation, and other applications where low quiescent current is required. It also provides cost-effective, compact solutions for structured and distributed power systems.

The working principle of the LTC7138EMSE#TRPBF is based on the use of an internal high-side power switch connected in series between the source voltage and ground. The switch is operated at a fixed frequency, determined by two external RC components. When the switch is on the input voltage is connected to the output, when the switch is off the output voltage is discharged through an internal diode. The circuit also includes an error amplifier and current sense circuitry for controlling the output voltage and current limit. The internal high-side switch is designed for a voltage rating above the input voltage and its drain current is limited only by an external resistor in the gate driver circuit.

The output voltage of the LTC7138EMSE#TRPBF is programmable by the reference voltage, which is set by an external resistor divider. For optimum efficiency, the output voltage should be equal to the input voltage. The maximum output current is set by an external resistor. The adjustable switching frequency and current limit allows for the optimization of efficiency of the device.

In summary, the LTC7138EMSE#TRPBF offers high efficiency, low power consumption, high power density, and low output ripple. It is capable of operating from a single supply between 2.7V and 5.5V and delivering up to 800mA continuous current with up to 95% efficiency. The adjustable switching frequency and current limit allow for the optimization of efficiency of the device, making it ideal for use in high-efficiency DC/DC converters and step-down DC/DC switching supplies. It is also the perfect selection for applications that require low quiescent current.

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