LTM8026IY#PBF Power Supplies - Board Mount

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DC-DC converters are very important components that are used to provide direct voltage conversion from one DC source to another. This type of power conversion has been around for decades and continues to be used in a variety of applications. The LTM8026IY#PBF is a new DC-DC step-down converter module with excellent efficiency and low noise performance. It provides high power density, wide operating temperature range, and small form factor for portable device power solutions. In this article, we will discuss the application field and working principle of the LTM8026IY#PBF DC-DC converter.

The LTM8026IY#PBF DC-DC converter can operate from a wide input voltage range of 2.3V to 28V and the output voltage is adjustable from 1.8V to 5.5V. It comes in a small QFN24 package measuring 3.5mm by 5mm and can run up to 3A output current. It is typically used in applications where a regulated voltage output is needed from a wide input voltage source. It is also suitable for powering embedded systems, FPGA, and ASICs. The LTM8026IY#PBF is also suitable for wearables, portable medical devices, networking equipments, home automation, and robotics.

The LTM8026IY#PBF DC-DC converter operates on the principle of pulse width modulation (PWM). It uses an external resistor to set the output voltage. The duty cycle of the PWM is determined by the feedback voltage and the internal voltage reference. A switching FET is driven by the PWM signal which steps down the input voltage to the desired output voltage. During each cycle, the FET is either on or off, depending on the voltage. When the voltage is greater than the reference voltage, the FET is switched off; and when the voltage is lesser than the reference voltage, the FET is switched on. The FET is turned on and off at a frequency of 250kHz. This switching action creates voltage spikes which are filtered out with a ceramic capacitor placed across the output voltage.

The LTM8026IY#PBF DC-DC converter has integrated power Good and enable functions. The power Good signal is used to indicate when the output voltage is within the specified regulation. If the output voltage exceeds the limit, the power Good signal will become low. The enable pin is used to turn the converter on and off. The shutdown current is very low, which means the device will consume very little power when it is off.

The LTM8026IY#PBF DC-DC converter can reach up to 92% efficiency under conditions of light load, moderate ripple, and low operating temperature. It also features current-limit protection, short-circuit protection, and thermal shutdown. The device has a typical no-load quiescent current of 1uA, and an operating temperature range -40°C to 125°C. The device is also available with the LT3081-1 regulator.

In conclusion, the LTM8026IY#PBF DC-DC converter is a highly efficient and reliable step-down module with a wide operating temperature range suitable for many applications. It is suitable for powering embedded systems, wearables, networking equipments, home automation, robotics, and medical devices. It operates on the principle of pulse width modulation (PWM) and can reach up to 92% efficiency under light load conditions. It also has integrated power Good and enable functions, current limit protection, short circuit protection, thermal shutdown, and is available with the LT3081-1 regulator.

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