数据手册：MAX1639 高精度、高效CPU电源，提供> 35A的驱动 .pdf [英文Rev.1(PDF,580kB)]
{状况：生产中。}
The MAX1639 is an ultra-high-performance, step-down DC-DC controller for CPU
power in high-end computer systems. Designed for demanding applications in which output voltage precision and good transient response are critical for proper operation, it delivers over 35A from 1.1V to 4.5V with ±1% total accuracy from a +5V ±10% supply. Excellent dynamic response corrects output transients caused by the latest dynamically clocked CPUs. This controller achieves over 90% efficiency by using synchronous rectification. Flying-capacitor bootstrap circuitry drives inexpensive, external N-channel MOSFETs.
The switching frequency is pin-selectable for 300kHz, 600kHz, or 1MHz. High switching frequencies allow the use of a small surface-mount inductor and decrease output filter capacitor requirements, reducing
board area and system cost.
Output overvoltage protection is enforced by a crowbar circuit that turns on the low-side MOSFET with 100% duty factor when the output is 200mV above the normal regulation point. Other features include internal digital soft-start, a power-good output, and a 3.5V ±1% reference output. The MAX1639 is available in a 16-pin narrow SOIC package.
产品关键特性
- Better than ±1% Output Accuracy Over Line and Load
- Greater than 90% Efficiency Using N-Channel MOSFETs
- Pin-Selected High Switching Frequency: 300kHz, 600kHz, or 1MHz
- Over 35A Output Current
- Resistor-Divider Adjustable Output from 1.1V to 4.5V
- Current-Mode Control for Fast Transient Response and Cycle-by-Cycle Current-Limit Protection
- Short-Circuit Protection with Foldback Current Limiting
- Crowbar Overvoltage Protection
- Power-Good (PWROK) Output
- Digital Soft-Start
- High-Current (2A) Drive Outputs
| 应用与使用范围
- 计算机：台式机、工作站和服务器
- GTL总线端接
- LAN服务器
- 本地DC-DC转换器，用于CPU
- 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 |
| MAX1639ESE | 生产中 | SOIC(N)；16引脚；61.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1639ESE+ | 生产中 | SOIC(N)；16引脚；61.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1639ESE+T | 生产中 | SOIC(N)；16引脚；61.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1639ESE-T | 生产中 | SOIC(N)；16引脚；61.9mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
功能接近器件
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