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| 型號(hào)： | 21103 |
| 英文描述： | AMD-K6 Processor Family Thermal Solutions Application Note AMD-K6 Processor Power Supply Design Application Note |
| 中文描述： | 的AMD - K6處理器系列散熱解決方案應(yīng)用指南的AMD - K6處理器電源設(shè)計(jì)應(yīng)用指南 |
| 文件頁數(shù)： | 55/64頁 |
| 文件大?。?/td> | 1056K |
| 代理商： | 21103 |
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45
21103G/0—February 1999
AMD-K6
Processor Power Supply Design
Semtech
SC1182 and SC1183
The SC1182 and SC1183 combine a synchronous voltage-mode
controller with two low-dropout linear regulators providing
most of the circuitry necessary to implement three DC-to-DC
converters for powering advanced processors such as the
AMD-K6 family of processors.
The SC1182 and SC1183 feature an integrated 5-bit DAC,
pulse-by-pulse current limiting, integrated power-good
signaling, and logic-compatible shutdown. The SC1182/3
switching section operates at a fixed frequency of 200 kHz. The
integrated DAC provides output voltage programmability from
2.0V to 3.5V in 100 mV increments and 1.30V to 2.05V in 50mV
increments with no external components.
The SC1182/3 linear sections are low dropout regulators. The
LDOs can provide 3.3 V for operation of the I/O, cache, memory
etc. The current capability of each LDO is determined by the
MOSFET chosen.
The circuit shown in Figure 23 on page 46 provides a current of
15A at 85% efficiency. Table 16 on page 47 shows the bill of
materials for the SC1182.
Contact Information
Semtech Corp
652 Mitchell Road
Newbury Park, CA 91320
Tel: (805) 498-2111 Fax: (805) 498-3804
www.semtech.com
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