MAX1711：高速、数字可调、降压型控制器，用于笔记本电脑

数字可调节降压控制器，只需四个输出电容即可为移动处理器提供12A电流

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.

关键特性

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

MAX1710、MAX1711、MAX1712：典型工作电路

应用

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

数据手册DataSheet

语言	下载文件	备注
英文	MAX1710-MAX1712.pdf	Rev 1; 07/2000

关键参数

Part Number	V_IN (V)	V_IN (V)	V_OUT1 (V)	V_OUT1 (V)	Output Adjust. Method	I_OUT1 (A)	Switch Type	Synchronous Switching	DC-DC Outputs	Oper. Freq. (kHz)	Package/Pins
Part Number	min	max	min	max	Output Adjust. Method	max	Switch Type	Synchronous Switching	DC-DC Outputs	Oper. Freq. (kHz)	Package/Pins
MAX1711	2	28	0.925	2	Digital/VID	7	External	Yes	1	550	QSOP/24

开发工具

技术资料

订购型号

型号	状况	推荐替代产品	封装	温度	RoHS/无铅
MAX1711C/D	生产中		DICE SALES,；NA引脚；DICE S；	-40°C至+85°C	参考数据资料
MAX1711EEG	停止供货	MAX1711EEG+	QSOP,；24引脚；54.2mm²	-40°C至+85°C	RoHS/无铅：否
MAX1711EEG+	生产中		QSOP,；24引脚；54.2mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1711EEG+T	生产中		QSOP,；24引脚；54.2mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1711EEG-T	停止供货	MAX1711EEG+T	QSOP,；24引脚；54.2mm²	-40°C至+85°C	RoHS/无铅：否