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CS51311

Cherry Semiconductor Corporation
Part Number CS51311
Manufacturer Cherry Semiconductor Corporation
Description Synchronous CPU Buck Controller
Published Mar 24, 2005
Detailed Description CS51311 CS51311 Synchronous CPU Buck Controller for 12V and 5V Applications Description The CS51311 is a synchronous du...
Datasheet PDF File CS51311 PDF File

CS51311
CS51311


Overview
CS51311 CS51311 Synchronous CPU Buck Controller for 12V and 5V Applications Description The CS51311 is a synchronous dual NFET Buck Regulator Controller.
It is designed to power the core logic of the latest high performance CPUs.
It TM uses the V2 control method to achieve the fastest possible transient response and best overall regulation.
It incorporates many additional features required to ensure the proper operation and protection of the CPU and Power system.
The CS51311 provides the industry’s most highly integrated solution, minimizing external component count, total solution size, and cost.
The CS51311 is specifically designed to power Intel’s Pentium® II processor and includes the following features: 5-bit DAC with 1.
2% tolerance, Power-Good output, over-current hiccup mode protection, VCC monitor, soft start, adaptive voltage positioning, adaptive FET non-overlap time, and remote sense.
The CS51311 will operate over an 8.
4V to 14V range and is available in 14 lead narrow body surface mount package.
Features s Synchronous Switching Regulator Controller for CPU VCORE s Dual N-Channel MOSFET Synchronous Buck Design s V2 TM Control Topology s 200ns Transient Loop Response s 5-bit DAC with 1.
2% Tolerance s Hiccup Mode Overcurrent Protection s 40ns Gate Rise and Fall Times (3.
3nF load) s 65ns Adaptive FET Non-overlap Time s Adaptive Voltage Positioning s Power-Good Output Monitors Regulator Output Application Diagram +12V +5V s VCC Monitor Provides Under Voltage Lockout s Enable Through use of the COMP pin 1µF 680pF 10K 1200µF/10V x3 100Ω 0.
01 µF FS70VSJ-03 0.
1 µF COFF COMP VCC GATE(H) GATE(L) FS70VSJ-03 1.
2µH 3.
3mΩ VCC(CORE) 2.
0V@19A 1200µF/10V x5 Package Options 14 Lead SO Narrow VID0 VID1 1 VID0 VID1 VID2 VID3 VID4 Gnd PWRGD 510Ω VFB VOUT 0.
1µF 510Ω COMP COFF PWRGD GATE(L) Gnd GATE(H) VCC VID2 VID3 VID4 VFB VOUT PWRGD V2 is a trademark of Switch Power, Inc.
Pentium is a registered trademark of Intel Corporation.
Cherry Semiconductor Cor...


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