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LM2748 - (LM2745 / LM2748) Synchronous Buck Controller

General Description

The LM2745/8 are high-speed synchronous buck regulator controllers with an accurate feedback voltage accuracy of ± 1.5%.

It can provide simple down conversion to output voltages as low as 0.6V.

Key Features

  • a fixed-frequency voltage-mode PWM control architecture which is adjustable from 50 kHz to 1 MHz with one external resistor. In addition, the LM2745 also allows the switching frequency to be synchronized to an external clock signal over the range of 250 kHz to 1 MHz. This wide range of switching frequency gives the power supply designer the flexibility to make better tradeoffs between component size, cost and efficiency. Features include the ability to startup with a pre-biased load on the outpu.

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www.DataSheet4U.com LM2745/8 Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization May 2005 LM2745/8 Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization General Description The LM2745/8 are high-speed synchronous buck regulator controllers with an accurate feedback voltage accuracy of ± 1.5%. It can provide simple down conversion to output voltages as low as 0.6V. Though the control sections of the IC are rated for 3 to 6V, the driver sections are designed to accept input supply rails as high as 14V. The use of adaptive non-overlapping MOSFET gate drivers helps avoid potential shoot-through problems while maintaining high efficiency.