MAX1712数据手册集成电路（IC）的电源管理-专用规格书PDF

描述 Description

The MAX1710/MAX1711 step-down controllers are intended for core CPU DC-DC converters in notebook computers. They feature a triple-threat combination of ultra-fast transient response, high DC accuracy, and high efficiency needed for leading-edge CPU core power supplies. Maxim's proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns \"instant-on\" response to load transients while maintaining a relatively constant switching frequency.
High DC precision is ensured by a 2-wire remote-sensing scheme that compensates for voltage drops in both the ground bus and supply rail. An on-board, digital-to-analog converter (DAC) sets the output voltage in compliance with Mobile Pentium II® CPU specifications.
The MAX1710 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large synchronous-rectifier MOSFETs.
Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, 2-stage conversion (stepping down the +5V system supply instead of the battery) at a higher switching frequency allows the minimum possible physical size.
The MAX1710/MAX1711 are identical except that the MAX1711 have 5-bit DACs and the MAX1710 has a 4-bit DAC. Also, the MAX1711 has a fixed overvoltage protection threshold at VOUT = 2.25V and undervoltage protection at VOUT = 0.8V whereas the MAX1710 has variable thresholds that track VOUT. The MAX1711 is intended for applications where the DAC code may change dynamically.

特性 Features

• Ultra-High Efficiency
• No Current-Sense Resistor (Lossless ILIMIT)
• Quick-PWM with 100ns Load-Step Response
• ±1% VOUT Accuracy over Line and Load
• 4-Bit On-Board DAC (MAX1710)
• 5-Bit On-Board DAC (MAX1711/MAX1712)
• 0.925V to 2V Output Adjust Range (MAX1711/MAX1712)
• 2V to 28V Battery Input Range
• 200/300/400/550kHz Switching Frequency
• Remote GND and VOUT Sensing
• Over/Undervoltage Protection
• 1.7ms Digital Soft-Start
• Drive Large Synchronous-Rectifier FETs
• 2V ±1% Reference Output
• Power-Good Indicator
• Small 24-Pin QSOP Package

应用 Application

• CPU核DC-DC转换器
• 坞站
• 笔记本电脑
• 单级(电池至VCORE)变换器
• 两级(+5V至VCORE)变换器

简介

MAX1712属于集成电路（IC）的电源管理-专用。由制造生产的MAX1712电源管理 - 专用专用型电源管理集成电路 (PMIC) 用于电源的控制或操作，适合特定或小范围的目标应用，例如汽车气囊管理、电容器组平衡、AC 公共电力监控、存储器总线端接、接地故障检测、能量收集、小型引擎管理、处理器或芯片集专用电压调节、负载突降保护、触觉驱动器、热电制冷器控制等。