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參數資料
| 型號： | SC473EVB |
| 廠商： | Semtech Corporation |
| 英文描述： | Single-Phase Single Chip Graphics Core Power Supply |
| 中文描述： | 單相單芯片圖形核心供電 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 486K |
| 代理商： | SC473EVB |
www.semtech.com
1
SC473
Single-Phase Single Chip
Graphics Core Power Supply
Updated - Aug 17, 2006
POWER MANAGEMENT
Description
Applications
Features
The SC473 is a single-phase chip, high-performance PWM
controller designed to power advanced graphic cores. On-
chip support is provided that includes slew-rate controlled
VID transitions.
The SC473 implements hysteretic control technology which
provides the fastest possible transient response while
avoiding the stability issues inherent to classical PWM
controllers. Eliminating the sense resistors reduces costs
and PCB area, plus increases system ef
fi
ciency. Integrated
SmartDriver technology initially turns on the high-side
driver with ‘soft’ drive to reduce ringing, EMI, and capaci-
tive turn-on of the low side MOSFET, while also increasing
overall ef
fi
ciency.
Hysteretic operation adaptively reduces the SC473 switch-
ing frequency at light loads. Combined with an automatic
“powersave” 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 5-bit DAC, accurate to 0.85%, sets the output voltage
reference, and implements the voltage 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, an open-drain PWRGD output,
dual-level over-voltage and programmable over-current pro-
tection. The SC473 is available in a space-saving 4x4mm,
24-pin MLP package.
Single-Phase Solution with Integrated Drivers
Hysteretic Control for Fast Transient Response
SmartDriver for reduced EMI
True Differential Remote (die) Sensing
VID Programmed Voltage
Delayed Power Good Signal with Blanking
Programmable Soft-Start and DAC Slew Control
Programmable OCP Threshold
Supports all Ceramic Decoupling Solutions
24-Pin MLP (4x4)
Lead-Free Package
RoHS and WEEE compliant
High Performance Graphics
Embedded Applications
相關PDF資料 |
PDF描述 |
|---|---|
| SC473MLTRT | Single-Phase Single Chip Graphics Core Power Supply |
| SC475A | Synchronous Buck Controller with Dual-Level VOUT Transition Support |
| SC475AEVB | Synchronous Buck Controller with Dual-Level VOUT Transition Support |
| SC475AMLTRT | Synchronous Buck Controller with Dual-Level VOUT Transition Support |
| SC4806 | Multiple Function Double Ended PWM Controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SC473MLTRT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Single-Phase Single Chip Graphics Core Power Supply |
| SC47-51-SUF | 制造商:Mikalor 功能描述:WIDE BOLT CLIP,47-51MM |
| SC475A | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller with Dual-Level VOUT Transition Support |
| SC475AEVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller with Dual-Level VOUT Transition Support |
| SC475AMLTRT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller with Dual-Level VOUT Transition Support |
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