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