MIC2593 Dual-Slot PCI Hot Plug Controller General Description Features The MIC2593 is a power controller supporting power Supports two completely independent PCI slots: distribution requirements for Peripheral Component Compliant to PCI v2.3 and PCI-X 1.0b power Interconnect hot plug systems compliant to PCI v2.3 and control requirements PCI-X 1.0b. TheMIC2593 provides complete power control Provides all major power control functions for two support for two PCI slots, including the 3.3V defined by AUX independent PCI-X 2.0 slots the PCI v2.3 specification. Support for +5V, +3.3V, +12V, Five voltage supplies supported: +12V, -12V, and 12V supplies is provided and includes programmable +5V,+3.3V, and +3.3V AUX current limit, voltage supervision, fault reporting, and circuit Integrated gate driver circuits, current sense, and breaker functions which provide fault isolation. The power MOSFETs for 3.3V , +12V, and 12V AUX MIC2593 also incorporates an SMBus interface that High-side +5V and +3.3V gate driver circuits for provides complete status and control of power within each external N-Channel MOSFETs slot. Overcurrent protection with adjustable timeout Data sheets and support documentation can be found on eliminates false tripping of circuit breakers Micrels web site at: www.micrel.com. Dual-level, dual-speed overcurrent detection circuitry for quick fault response without nuisance tripping Slot power control with Power-is-Good and Fault status reporting Via software over an SMBus interface or Via dedicated hardware input/output lines: Hot Plug Interface (HPI) Complete thermal isolation between circuitry for Slot A and Slot B One General Purpose Input (GPI) pin per slot for mechanical switch or plug-in card retention/removal input Applications PCI hot plug power distribution Ideal Applications: Mid- and High-end Server Applications compliant to PCI v2.3, PCI-X 1.0b, and PCI-X 2.0 Ordering Information Part Number 5V & 3V Fast-trip +12V & 12V Fast-trip Operating Package Lead Finish Threshold Threshold Temp. Range MIC2593-2BTQ 100mV 1.5A/0.4A 0 to +70C 48-Pin TQFP Standard MIC2593-2YTQ 100mV 1.5A/0.4A 0 to +70C 48-Pin TQFP Pb-Free Note: Contact factory for availability of the MIC2593-5YTQ option that disables the 100mV fast-trip threshold. LITTLE FOOT is a registered trademark of Siliconix Incorporated. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC2593 Typical Application Power +12V Supply 12V +5.0V +3.3V 0.1F 0.1F 0.1F PCI Connector VSTBY 532 17 18 0.1F 12VINA 12VINB 12MVINA 12MVINB PCI Bus 15 VAUXA 0.1F VSTBYA 11 5VINA 6 26 3.3VAUXA 0.1F VSTBYB 7 R SENSE 5VSENSEA 375mA *R 12VGATEA 8 3 5VGATEA 12VSLEWA 0.01F Si4420DY 34 12VSLEWB **C3 9 5VOUTA **C4 12 3VINA 0.1F R SENSE 2 CFILTERA 35 13 3VSENSEA CFILTERB **C1 V STBY **C2 *R 3VGATEA Si4420DY 14 3VGATEA 16 3VOUTA 3.3V, 7.6A 100k 100k 10 4 MIC2593 12VOUTA 12V, 0.5A GPIA GPIA 19 12MVOUTA 12V, 0.1A 38 C GATE GPIB GPIB 0.01F V STBY 31 5VINB 0.1F 30 R 5VSENSEB SENSE 10k 4 45 AUXENA *R AUXENA 12VGATEB 42 AUXENB 29 AUXENB 5VGATEB 44 ONA ONA Si4420DY 0.01F 43 ONB ONB 28 5VOUTB 5V, 5A V STBY Hot Plug 0.1F Controller R 10k 2 SENSE 3VINB 25 1 /FAULTA /FAULTA 24 36 3VSENSEB /FAULTB /FAULTB *R 3VGATEB Si4420DY 3VGATEB 41 23 A0 21 SMBus 3VOUTB 3.3V, 7.6A 40 Base A1 27 12VOUTB 12V, 0.5A Address 39 A2 20 12MVOUTB 12V, 0.1A 37 /INT 22 VAUXB 3.3VAUXB V STBY 47 33 C SCL GND GATE 46 48 0.01F SDA GND PCI Bus 10k 3 SDA SDA PCI Connector Management SMBus I/O SCL SCL Controller /INT /INT * Values for R and R may vary depending upon the C of the external MOSFETs. 5VGATE A/B 3VGATE A/B GS ** Values determined by design requirements. See Functional Description section for detailed information. MBRS140T3 or equivalent is recommended. Bold lines indicate high current paths M9999-092208 September 2008 2