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SC451 データシート

部品番号コンポーネント説明メーカー
SC451 Portable IMVP-IV™ and IMVP-IV+™ Single Phase Power Supply Controller Semtech
Semtech Corporation Semtech
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Description
The SC451 PowerStep IV™ IC is a single chip high-performance Hysteretic PWM controller. With its integrated SmartDriver™, it powers advanced IMVP-IV™ and IMVP4+™ processors. The SC451 features extended Intel Mobile Voltage Positioning (IMVP™) to increase battery life by reducing the voltage at the processor when it is heavily loaded. It directly supports Intel’s SpeedStep® processors for even longer battery life. The SC451 fully supports the Intel® Geyserville-III core voltage specification.

Features
◆ IMVP-IV™ and IMVP-IV+™ compliant single chip
   solution
◆ On-chip CLK_ENABLE# and IMVP4_PWRGD outputs
◆ Backward compatible with SC1479
◆ High-speed hysteretic controller
◆ Single-phase operation
◆ Selectable analog or VID controlled DeeperSleep
   setting
◆ 6 bit VID programmable output
◆ Integrated drivers with soft high side turn-on
◆ Programmable softstart
◆ Programmable boot voltage
◆ Programmable DeeperSleep voltage
◆ Under-voltage lock out on VccA
◆ Over-voltage protection on CORE
◆ Current limit protection on CORE
◆ Thermal protection
◆ Powergood flag with blanking during VID or
   DeeperSleep mode changes
◆ Automatic powersave at light load
◆ TSSOP-28 and TSSOP-38 package options

Applications
◆ Low power Notebook and Laptop computers
◆ Embedded Applications

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