LTC3720 2-Phase, High Efficiency, Step-Down Controller for AMD Opteron™ CPUs
The LTC®3720 is a synchronous step-down switching regulator controller for CPU power. An output voltage between 1.05V and 1.825V is selected by a 5-bit code (Intel VRM8.5 VID specification). The controller uses a valley current control architecture to deliver very low duty cycles without requiring a sense resistor. Operating frequency is selected by an external resistor and is compensated for variations in VIN and VOUT.
Discontinuous mode operation provides high efficiency operation at light loads. A forced continuous control pin reduces noise and RF interference and can assist secondary winding regulation by disabling discontinuous mode operation when the main output is lightly loaded.
Fault protection is provided by internal foldback current limiting, an output overvoltage comparator and optional short-circuit shutdown timer. Soft-start capability for supply sequencing is accomplished using an external timing capacitor. The regulator current limit level is also user programmable. Wide supply range allows operation from 4V to 36V at the input.
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LTC3720 订购信息和价格参考Package Variations and Pricing
| 器件型号 | 封装 | 引脚 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) * |
| LTC3720EGN | SSOP | 28 | E | $4.64 | $3.05 |
| LTC3720EGN#PBF | SSOP | 28 | E | $4.64 | $3.05 |
| LTC3720EGN#TR | SSOP | 28 | E | $3.15 | |
| LTC3720EGN#TRPBF | SSOP | 28 | E | $3.15 |
LTC3720 数据手册及相关资料下载
- 数据手册(英文) : LTC3720 - Single Phase VRM8.5 Current Mode Step-Down Controller.PDF
- 可靠性数据 : R384 Reliability Data .PDF
