RC5054中文资料仙童半导体数据手册PDF规格书

描述 Description

The RC5054A provides complete control and protection for a DC-DC converter optimized for high-performance microprocessor applications. It is designed to drive two N-Channel MOSFETs in a synchronous-rectified buck topology. The RC5054A integrates all of the control, output adjustment, monitoring and protection functions into a single package.

特性 Features

• Drives Two N-Channel MOSFETs

• Operates from +5V Power Input

• Simple Single-Loop Control Design

- Voltage-Mode PWM Control

• Fast Transient Response

- High-Bandwidth Error Amplifier

- Full 0 to 100 Duty Ratio

• Excellent Output Voltage Regulation

• TTL Compatible 5 Bit Digital-to-Analog Output Voltage Selection - Wide Range - 1.3VDC to 3.5VDC

- 0.1V Binary Steps from 2.1VDC to 3.5VDC

- 0.05V Binary Steps from 1.3VDC to 2.1VDC

• Power-Good Output Voltage Monitor

• Over-Voltage and Over-Current Fault Monitors

- Does Not Require Extra Current Sensing Element, Uses MOSFET’s RDS(ON)

• Small Converter Size

- Constant Frequency Operation

- 200kHz Free-Running Oscillator Programmable from 50kHz to 1MHz

Applications

• Power Supply for Pentium®, Pentium Pro, PowerPC™ and Alpha™ Microprocessors

• High-Power 5V to 3.xV DC-DC Regulators

• Low-Voltage Distributed Power Supplies