精品国产99久久久久久www_亚洲精彩视频在线观看的_性欧美婬妇ⅹxxx视频_里番肉工口全彩老师_a天堂最新在线观看_精品国产在天天在线观看_免费看那种视频_樱桃电视剧全集播放_成人性视频免费看的鲁片_中国伦理影院

General Description

The MAX748A/MAX763A are 3.3V-output CMOS, step down switching regulators. The MAX748A accepts inputs from 3.3V to 16V and delivers up to 500mA. The MAX763A accepts inputs between 3.3V and 11V and delivers up to 500mA. Typical efficiencies are 85 to 90. Quiescent supply current is 1.4mA (MAX763A), and only 0.2μA in shutdown.

Pulse-width-modulation (PWM) current-mode control provides precise output regulation and excellent transient responses. Output voltage accuracy is guaranteed to be ±5 over line, load, and temperature variations. Fixed-frequency switching allows easy filtering of output ripple and noise, as well as the use of small external components. A 22μH inductor works in most applications, so no magnetics design is necessary.

The MAX748A/MAX763A also feature cycle-by-cycle current limiting, overcurrent limiting, undervoltage lockout, and programmable soft-start protection. The MAX748A is available in 8-pin DIP and 16-pin wide SO packages; the MAX763A comes in 8-pin DIP and SO packages.

Features

? Up to 500mA Load Currents

? Guaranteed 159kHz to 219.5kHz Current-Mode PWM

? 85 to 90 Efficiencies

? 1.7mA Quiescent Current (MAX748A)

?? 1.4mA Quiescent Current (MAX763A)

? 0.2μA Shutdown Supply Current

? 22μH Preselected Inductor Value;

?? No Component Design Required

? Overcurrent, Soft-Start, and Undervoltage

?? Lockout Protection

? Cycle-by-Cycle Current Limiting

? 8-Pin DIP/SO Packages (MAX763A)

Applications

?? 5V-to-3.3V Converters

?? Cellular Phones

?? Portable Instruments

?? Hand-Held Computers

?? Computer Peripherals