SC452 [SEMTECH]
Dual-Phase Single Chip IMVP-6 Vcore Power Supply; 双相单芯片IMVP - 6的Vcore电源
| 型号： | SC452 |
| 厂家： | 
SEMTECH CORPORATION |
| 描述： | Dual-Phase Single Chip IMVP-6 Vcore Power Supply |
| 文件： | 总1页 (文件大小：60K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SC452
Dual-Phase Single Chip
IMVP-6 Vcore Power Supply
POWER MANAGEMENT
Description
Features
The SC452 is a single chip high-performance PWM con-
troller designed to power advanced IMVP-6™ processors.
On-chip support is provided for all of the IMVP-6 require-
ments, including Active Voltage Positioning, Geyserville-3
VID transitions, VID-controlled Deeper Sleep voltage set-
ting, PSI# and DPRSL control, fast/slow C4 exit, and de-
fault Boot voltage.
ꢀ Dual-Phase Solution with Integrated Drivers
ꢀ Hysteretic Control for Fast Transient Response
ꢀ Combi-Sense Provides Loss-Less Current Sensing
ꢀ Dynamic Current Sharing
ꢀ Active Voltage Positioning
ꢀ True Differential Remote (die) Sensing
ꢀ On-Chip Support for all IMVP-6 Power Management
Features
The SC452 implements hysteretic control technology
which provides the fastest possible transient response
while avoiding the stability issues inherent to classical
PWM controllers. Semtech’s proprietary Combi-Sense®
technology provides a loss-less current sensing scheme
which is extremely robust and easy to lay out. Eliminat-
ing 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 capacitive turn-on of the
low side MOSFET, while also increasing overall efficiency.
ꢀ VID Programmed Deeper Sleep Voltage
ꢀ Fast/Slow C4E Break-Event Support
ꢀ Clock Enable (CLKEN#) Output
ꢀ Delayed Power Good Signal with Blanking
ꢀ Programmable Soft-Start and DAC Slew Control
ꢀ Programmable OCP Threshold
ꢀ Supports all Ceramic Decoupling Solutions
ꢀ 44 pin MLP (7x7)
ꢀ Lead-free Package
Hysteretic operation adaptively reduces the SC452
switching frequency at light loads. Combined with an
automatic “power-save” mode which prevents negative
current flow in the low-side FET, system efficiency is sig-
nificantly enhanced during light loading conditions. The
SC452 changes from dual-phase to single-phase opera-
tion whenever PSI# asserts, providing optimal efficiency
across the entire power range.
Applications
ꢀ IMVP-6/6+ Notebook PCs
ꢀ Embedded Applications
ꢀ Graphics and Other Processor Cores
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 accu-
rate point-of-load regulation at the processor die. Other
features include programmable soft-start, open-drain
IMVP6_PWRGD and CLKEN# outputs, dynamic current
sharing, over-voltage and programmable over-current pro-
tection. The SC452 is available in a space-saving 44 pin
MLP package.
February 22, 2006
1
www.semtech.com
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