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參數資料
| 型號： | SC457 |
| 廠商： | Semtech Corporation |
| 英文描述： | Single-Phase Single Chip Vcore Power Supply |
| 中文描述： | 單相單晶片核心電壓電源供應器 |
| 文件頁數： | 1/1頁 |
| 文件大?。?/td> | 64K |
| 代理商： | SC457 |
www.semtech.com
1
POWER MANAGEMENT
Description
The SC457 is a single phase, high performance PWM con-
troller designed to power advanced processors. On-chip
support is provided for VID on-the-
fl
y transitions and active
voltage positioning.
Single-Phase Single Chip
Vcore Power Supply
April 12, 2006
SC457
Applications
Features
Single-Phase Solution with Integrated Drivers
Hysteretic Control for Fast Transient Response
Active Voltage Positioning
True Differential Remote (die) Sensing
On-Chip Support for all Power Management
Features
Programmable Soft-Start and DAC Slew Control
Programmable OCP Threshold
Supports all Ceramic Decoupling Solutions
32-Pin MLP (5x5) - product is WEEE and RoHS
compliant
Default 1.2V Boot Voltage
Soft OFF State
The SC457 implements hysteretic control technology
providing the fastest possible transient response while
avoiding the stability issues inherent to classical PWM
controllers. Eliminating the sense resistors reduces costs
and PCB area while increasing system ef
fi
ciency. Integrated
SmartDriver technology initially turns on the high-side
driver with soft drive to reduce ringing, EMI, and capacitive
turn-on of the low side MOSFET, while increasing overall
ef
fi
ciency.
Hysteretic operation adaptively reduces the SC457 switch-
ing frequency at light loads. Combined with an automatic
power-save mode which prevents negative current
fl
ow in
the low-side FET, system ef
fi
ciency is signi
fi
cantly enhanced
during light loading conditions.
A 7-bit DAC, accurate to 0.85%, sets the output voltage
reference and implements the 0.300V to 1.500V range
required by the processor. The DAC slew rate is externally
programmed to minimize transient currents and audible
noise. True differential remote sensing provides accurate
point-of-load regulation at the processor die. Other features
include programmable soft-start, open-drain PG_DEL and
PG# outputs, dynamic current sharing, over-voltage and
programmable over-current protection. The SC457 is avail-
able in a space-saving 32-pin MLP package.
Notebook PCs
Embedded Applications
Graphics and other Processor Cores
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SC457MLTRT | 功能描述:IC VCORE PWR SUPPLY SNGL 32-MLP RoHS:是 類別:集成電路 (IC) >> 專用 IC 系列:* 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:調幀器 應用:數據傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應商設備封裝:400-PBGA（27x27） 包裝:散裝 |
| SC458 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Complete Dual-Phase Low VOUT Power Supply Controller |
| SC458IMLTRT | 功能描述:IC REG CTRLR PWM 44-MLP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 特色產品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數:1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| SC4595TSKTRT | 制造商:Semtech Corporation 功能描述: |
| SC45D | 制造商:Powerex Power Semiconductors 功能描述: |
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