MAX1714B中文资料高速、降压型控制器，用于笔记本电脑数据手册ADI规格书

描述 Description

The MAX1714 pulse-width modulation (PWM) controller provides the high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate low-voltage CPU core or chip-set/RAM supplies in notebook computers.
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.
The MAX1714 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, two-stage conversion (stepping down the +5V system supply instead of the battery) at a higher switching frequency allows the minimum possible physical size.
The MAX1714 is intended for CPU core, chipset, DRAM, or other low-voltage supplies as low as 1V. The MAX1714A is available in a 20-pin QSOP package and includes overvoltage protection. The MAX1714B is available in a 16-pin QSOP package with no overvoltage protection. For applications requiring VID compliance or DAC control of output voltage, refer to the MAX1710/MAX1711 data sheet. For a dual output version, refer to the MAX1715 data sheet.

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
·2.5V/3.3V Fixed or 1V to 5.5V Adjustable Output Range
·2V to 28V Battery Input Range
·200/300/450/600kHz Switching Frequency
·Overvoltage Protection (MAX1714A)
·Undervoltage Protection
·1.7ms Digital Soft-Start
·Drives Large Synchronous-Rectifier FETs
·2V ±1% Reference Output
·Power-Good Indicator

应用 Application

·1.8V与2.5V I/O电源
·芯片组/RAM供电，电压可低至1V
·CPU核电源
·笔记本电脑

简介

MAX1714B属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由ADI制造生产的MAX1714BDC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。