MP1517DR-LF-P Integrated Circuits (ICs)

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The MP1517DR-LF-P is a high-performance synchronous step-down switching regulator featuring a wide input voltage (4.5V - 28V) and a dual-mode function. This device is suited for applications where high efficiency is required, such as notebook computers, PCs, PDAs, DVD players, etc. It is also suitable for desktop and server system applications, including those that require a low-voltage drop regulator.

The MP1517DR is part of the Total Power ManagementTM (TPM) family of switching regulators from Monolithic Power Systems, Inc. (MPS). It provides up to 3A output current and is capable of switching at frequencies up to 1.8MHz. This device includes an on-board discreet fast-on diode, which limits the reverse conduction current, thereby providing a high level of system efficiency. Additionally, it features low quiescent current and low voltage output accuracy for high efficiency.

The MP1517DR-LF-P operates in two modes: constant-off-time (COT) mode and constant-frequency-variable-off-time (CFVOT) mode. In the COT mode, the load current is proportional to the switching period, while in the CFVOT mode, the load current is proportional to the switching frequency. This device also features programmable soft-start for power supply sequencing, as well as an under-voltage lockout (UVLO) circuit which prevents the IC from operating out of its specified operating range.

The MP1517DR-LF-P is optimized to provide a high-efficiency solution while providing a high level of performance. It utilizes a constant-conductance MOSFET switch, which has a high drain-to-source impedance, providing a low-voltage drop and quiescent current required for high-efficiency applications. It also utilizes a conversion current-mode control with an adjustable oscillator frequency and output voltage. This simplifies design by eliminating the need for selecting external components.

In addition, the MP1517DR-LF-P features an adjustable output voltage from 0V to 85% of the input voltage. This device also features an integrated operating temperature ranging from -40°C to +85°C for reliable operation in harsh environments. The MP1517DR-LF-P also features a simple and straightforward 8-pin package for ease of assembly and design consolidation.

In conclusion, the MP1517DR-LF-P is an ideal solution for high power, low voltage systems requiring a high level of efficiency. Its wide input voltage range, programmable soft-start, low quiescent current, and high-efficiency performance make it an excellent choice for applications such as notebook and desktop computers, servers, PDAs, DVD players, etc.

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