数据手册：MAX1714, MAX1714A, MAX1714B 低成本、具有快速响应特性、精度为1%的电源控制器，用于下一代笔记本CPU核以及I/O供电 .pdf [英文Rev.2(PDF,896kB)]
{状况：生产中。}
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.
产品关键特性
- Ultra-High Efficiency
- No Current-Sense Resistor (Lossless ILIMIT)
- Quick-PWM with 100ns Load-Step Response
- 1% VOUT Accuracy Over Line and Load
- 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
| 应用与使用范围
- 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
|
最简工作电路
芯片订购型号
| 订购型号 | 产品状态 | 封装形式 | 工作温度 | RoHS/无铅 |
| MAX1714AEEP | 生产中 | QSOP；20引脚；54.2mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1714AEEP+ | 生产中 | QSOP；20引脚；54.2mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1714AEEP+T | 生产中 | QSOP；20引脚；54.2mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1714AEEP-T | 生产中 | QSOP；20引脚；54.2mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1714BEEE | 生产中 | QSOP；16引脚；30.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1714BEEE+ | 生产中 | QSOP；16引脚；30.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1714BEEE+T | 生产中 | QSOP；16引脚；30.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1714BEEE-T | 生产中 | QSOP；16引脚封装信息 | -40°C至+85°C | 参考数据资料 |
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