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PDF SC472B Data sheet ( Hoja de datos )
| Número de pieza | SC472B | |
| Descripción | Single-Phase Single Chip Graphics Core Power Supply | |
| Fabricantes | Semtech | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SC472B (archivo pdf) en la parte inferior de esta página. Total 1 Páginas | ||
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POWER MANAGEMENT
Description
The SC472B is a single-phase chip, high-performance
PWM controller designed to power advanced graphic cores.
On-chip support is provided for all of the Intel® integrated
requirements, including Active Voltage Positioning, Slew-
rate controlled VID transitions, and VID-Controlled Sleep
voltage settings.
The SC472B implements hysteretic control technology
www.DatawShheiecth4Up.croomvides 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 efficiency. 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 efficiency.
Hysteretic operation adaptively reduces the SC472B
switching frequency at light loads. Combined with an auto-
matic “powersave” mode which prevents negative current
flow in the low-side FET, system efficiency is significantly
enhanced during light loading conditions.
SC472B
Single-Phase Single Chip
Graphics Core Power Supply
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 IMVP-6+ Graphics
Power Management Features
VID Programmed Deeper Sleep 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. This product is fully WEEE and
RoHS compliant.
Applications
IMVP-6+ Notebook Graphic Cores
Embedded Applications
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
protection. The SC472B is available in a space-saving
4x4mm, 24-pin MLP package.
Updated - Apr 10, 2007
www.semtech.com
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| PDF Descargar | [ Datasheet SC472B.PDF ] | |
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