数据手册：MAX1716, MAX1854, MAX1855 电压定位CPU电源，提供精确的电流检测 .pdf [英文Rev.0(PDF,856kB)]
{状况：生产中。}
The MAX1716/MAX1854/MAX1855 step-down controllers are intended for core CPU DC-DC converters in notebook computers. They feature a dynamically adjustable output (5-bit DAC), 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.
The MAX1716/MAX1854/MAX1855 are designed specifically for CPU core applications requiring a voltage-positioned supply. The voltage-positioning input (VPS), combined with a high DC accuracy control loop, is used to implement a power supply that modifies its output set point in response to the load current. This arrangement decreases full-load power dissipation and reduces the required number of output capacitors.
The 28V input range of the MAX1716/MAX1854/MAX1855 enables single-stage buck conversion from high-voltage batteries for the maximum possible efficiency. Alternatively, the devices' high-frequency capability combined with two-stage conversion (stepping down the +5V system supply instead of the battery) allows the smallest possible physical size. The output voltage can be dynamically adjusted through the 5-bit digital-to-analog converter (DAC) inputs.
The MAX1716/MAX1854/MAX1855 are available in a 24-pin QSOP package. For applications requiring SpeedStep® power control (see the MAX1717).
产品关键特性
- High-Efficiency Voltage Positioning
- Quick-PWM Architecture
- ±1% VOUT Line-Regulation Accuracy
- Adjustable Output Range (5-Bit DAC)
- MAX1716: 0.925V to 1.6V
- MAX1854: 0.925V to 2.0V
- MAX1855: 0.600V to 1.75V
- 2V to 28V Input Range
- 200/300/400/550kHz Switching Frequency
- Output Undervoltage Protection
- Overvoltage Protection (MAX1716/MAX1855)
- Drive Large Synchronous-Rectifier MOSFETs
- 1.7ms Digital Soft-Start
- 700µA ICC Supply Current
- 1µA Shutdown Supply Current
- 2V ±1% Reference Output
- VGATE Transition-Complete Indicator
- Small 24-Pin QSOP Package
| 应用与使用范围
- 计算机：台式机、工作站和服务器
- 笔记本电脑
- 服务器
- 工作站
|
典型工作电路
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 |
| MAX1716EEG | 生产中 | QSOP；24引脚；54.2mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1716EEG+ | 生产中 | QSOP；24引脚；54.2mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1716EEG+T | 生产中 | QSOP；封装信息 | -40°C至+85°C | 参考数据资料 |
| MAX1716EEG-T | 生产中 | QSOP；24引脚封装信息 | -40°C至+85°C | 参考数据资料 |
| MAX1854EEG | 生产中 | QSOP；24引脚；54.2mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1854EEG-T | 生产中 | QSOP；24引脚封装信息 | -40°C至+85°C | 参考数据资料 |
| MAX1854EEG/GG8 | 生产中 | QSOP；24引脚；54.2mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1854EEG/GG8-T | 生产中 | QSOP；封装信息 | -40°C至+85°C | 参考数据资料 |
| MAX1855EEG | 生产中 | QSOP；24引脚；54.2mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1855EEG-T | 生产中 | QSOP；24引脚封装信息 | -40°C至+85°C | 参考数据资料 |
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