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