描述 Description

The MAX742 DC-DC converter is a controller for dual-output power supplies in the 3W to 60W range. Relying on simple two-terminal inductors rather than transformers, the MAX742 regulates both outputs independently to within ±4% over all conditions of line voltage, temperature, and load current.
The MAX742 has high efficiency (up to 92%) over a wide range of output loading. Two independent PWM current-mode feedback loops provide tight regulation and operation free from subharmonic noise. The MAX742 can operate at 100kHz or 200kHz, so it can be used with small and lightweight external components. Also ripple and noise are easy to filter. The MAX742 provides a regulated output for inputs ranging from 4.2V to 10V (and higher with additional components).
External power MOSFETs driven directly from the MAX742 are protected by cycle-by-cycle overcurrent sensing. The MAX742 also features undervoltage lockout, thermal shutdown, and programmable soft-start.
If 3W of load power or less is needed, refer to the MAX743 data sheet for a device with internal power MOSFETs.

特性 Features

? Specs Guaranteed for In-Circuit Performance
? Load Currents to ±2A
? 4.2V to 10V Input-Voltage Range
? Switches From ±15V to ±12V Under Logic Control
? ±4% Output Tolerance Max Over Temp, Line, and Load
? 90% Typ Efficiency
? Low-Noise, Current-Mode Feedback
? Cycle-by-Cycle Current Limiting
? Undervoltage Lockout and Soft-Start
? 100kHz or 200kHz Operation

應用 Application

? 計算機外設
? 替代DC-DC轉換器模塊
? 分布式供電系統(tǒng)

簡介

MAX742屬于集成電路（IC）的濾波器-有源。由制造生產(chǎn)的MAX742濾波器 - 有源有源濾波器是利用無源元件和放大元件消除電路中多余頻率和信號的器件。濾波器類型包括抗混疊、帶通、貝塞爾、巴特沃茲、考爾、連續(xù)低通、數(shù)字、橢圓帶通、FIR、半帶、線性相位、低通、紋波、SD/ED/HD、串行 I/O、通用和可變型，頻率范圍為 2kHz 至 6.9GHz。