General Description

The RT8800/B are general purpose multi-phase synchronous buck controllers dedicating for high density power supply regulation. The parts implement 2, and 3 buck switching stages operating in interleaved phase set automatically. The output voltage is regulated and controlled following the input voltage of FB pin. With such a single analog control, the RT8800/B provide a simple, flexible, wide-range and extreme cost-effective high density voltage regulation solutions for various high-density power supply application.

Features

? 5V Power Supply Voltage

? 2/3-Phase Power Conversion with Automatic Phase

Selection (RT8800 : 2/3-Phase, RT8800B : 2-Phase)

? Output Voltage Controlled by External Reference Voltage

? Precise Core Voltage Regulation

? Power Stage Thermal Balance by DCR Current Sensing

? Extreme Low-Cost, Lossless Time Sharing Current Sensing

? Internal Soft-start

? Hiccup Mode Over-Current Protection

? Over-Voltage Protection

? Adjustable Operating Frequency and Typical at 300kHz Per Phase

? Power Good indication

? Small 16-Lead VQFN Package (For RT8800 only)

? RoHS Compliant and 100 Lead (Pb)-Free

Applications

? Desktop CPU core power

? Low Output Voltage, High power density DC-DC Converters

? Voltage Regulator Modules