Description

This all-in-one SiP for POL (point-of-load) applications is a multi-chip module incorporating a high-side MOS FET, low-side MOS FET, and PWM controller in a single QFN package. The on and off timing of the power MOS FET is optimized by the built-in driver circuit, making this device suitable for large-current high-efficiency buck converters.

In a simple peak-current mode topology, stable operation is obtained in a closed power loop, and a fast converter is easily realized with the addition of simple components. Furthermore, the same topology can be applied to realize converters for parallel synchronized operation with current sharing, and two-phase operation.

The package also incorporates a high-side bootstrap Schottky barrier diode (SBD), eliminating the need for an external SBD for this purpose.

Features

• Three chips in one package for high-efficiency and space saving

• Large average output current (35 A)

• Wide input voltage range: 8 to 14 V

• 0.6 V reference voltage accurate to within 1

• Wide programmable switching frequency: 200 kHz to 1 MHz

• Fast response by peak-current-mode topology.

• Simple current sharing (up to five modules in parallel)

• Two-phase operation in parallel operation

• Built-in SBD for boot strapping

• On/off control

• Hiccup operation under over load condition

• Tracking function

• Thin small package: 56-pin QFN (8 mm × 8 mm)

• Pb-free

Applications

• Network equipment

• Telecommunications equipment

• Servers

• POL modules