LTM4627EY#PBF

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The LTM4627EY#PBF is a DC DC converter manufactured by Analog Devices, Inc. that is specifically designed for applications requiring an extended operating temperature range and high efficiency operation. DC DC converters are devices that produce a stable output voltage from an input voltage that may vary from a few volts to many thousands of volts. Typically, they are used to convert or step down a higher input voltage and/or current to a lower output voltage and/or current.

The LTM4627EY#PBF features a wide input voltage range of 2.7V to 38V and delivers an output voltage of 1.5V or 2.5V with an output current of up to 2A. It also offers an adjustable output voltage, external synchronization to an external clock, and a programmable soft-start feature. Furthermore, it can provide up to 95% efficiency, resulting in very low power dissipation. The device is available in an 8-lead 2mm x 3mm package making it ideal for power applications where space constraints are an issue.

The LTM4627EY#PBF utilizes a synchronous buck converter topology. This type of topology provides a simple method of regulating output voltage from a higher input voltage. The LTM4627EY#PBF consists of two MOSFETs, one formed of a low-side and a high-side MOSFET. Control of the MOSFETs is achieved by utilizing an internal pulse-width modulated (PWM) controller. The controller operates in a continuous, non-overlapping way such that the output voltage of the converter is determined by the duty cycle of the high-side MOSFET, along with the reference voltage. The PWM controller then operates at a frequency (controlled by the external clock) to maintain the duty cycle, thereby ensuring a stable output voltage.

The LTM4627EY#PBF also features various protections such as over-voltage, short-circuit, and open-circuit protection. Moreover, it has dropout immunity which provides the capability to deliver the output voltage with very small input voltage differences. This further reduces power dissipation and allows for a higher power density design. It also has under-voltage lockout (UVLO) and has the ability to detect a fault condition and enter a low-power sleep mode if a fault is detected.

The LTM4627EY#PBF is an ideal solution for high efficiency applications that require an extended operating temperature range and is especially suitable for industrial applications, embedded solutions, and battery powered systems. The device offers extended reliability, low noise operation, outstanding efficiency, and low power dissipation, making it an ideal choice for DC DC converter applications.

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