MIC2590B Micrel Semiconductor, MIC2590B Datasheet
MIC2590B
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MIC2590B Summary of contents
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... MIC2590B General Description The MIC2590B is a power controller supporting power distri- bution requirements for Peripheral Component Interconnect (PCI) hot plug compliant systems incorporating the Intelligent Platform Management Interface (IPMI). The MIC2590B pro- vides complete power control support for two PCI slots including the 3 ...
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... VAUXA VSTBY2 5VINA 5VSENA 12SLEWA 12SLEWB 5VGATEA 5VOUTA C GATE CFILTERA 3VINA IREF 3VSENA CFILTERB C GATE 3VGATEA 3VOUTA 12VOUTA 12MVOUTA 5VINB MIC2590B 4.7µF GND 5VSENB ONA/ONB 5VGATEB AUXENA/AUXENB 5VOUTB /FAULTA, /FAULTB C GATE 3VINB A0 3VSENB A1 A2 3VGATEB /INT 3VOUTB SCL 12VOUTB 12MVOUTB SDA VAUXB 4.7µ ...
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... GPIA 5 12VIN 6 5VINA 7 8 5VGATEA 9 5VOUTA 10 12VOUTA 11 VSTBY 3VINA 48-Pin TQFP (BTQ /FAULTB 35 CFILTERB 34 12VSLEWB 33 IREF 32 12VIN 31 5VINB 30 5VSENSEB 29 5VGATEB 28 5VOUTB 27 12VOUTB 26 VSTBY 25 3VINB Micrel MIC2590B ...
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... MIC2590B Pin Function 5V Supply Power and Sense Inputs [A/B]: Two pins are provided for Kelvin connection (one for each slot). Pin 6 is the Kelvin sense connection to the supply side of the sense resistor for 5V Slot A. Pin 31 is the Kelvin sense connection to the supply side of the sense resistor for 5V Slot B ...
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... Interrupt Output: Open Drain, Active-low. Asserted whenever a power fault is detected. Cleared by writing a logic 1 to the respective active bit into the Status Register. 5 Micrel and the gate of the GATE . Whenever an FLT and the gate of the GATE . Whenever an FLT MIC2590B ...
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... A2, A1 GPIA, GPIB 46 GND MIC2590B Pin Function SMBus Data: Bidirectional SMBus data line. SMBus Clock: Input. SMBus Address Select pins: Connect to ground or leave open in order to program device SMBus base address. There is an internal pull-up to VSTBY on each of these inputs. ...
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... Typ 0.6 1.2 0.5 –1.0 2 2.2 2.5 3.7 4.0 –10 –9 2.8 2.9 180 50 10.2 10.5 –10.8 –10.6 2.7 2.8 4.4 4.5 2.7 2.8 30 12V -1 1.20 1.25 1.80 2.5 THILIMIT 113 Disabled Micrel Max Units 2.0 mA 2.0 mA 0.7 mA –2 2.75 V 4.3 V – 10.8 V –10.2 V 2.9 V 4 12V V IN µ 1.30 V µA 5.0 µ 135 mV MIC2590B ...
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... V Enabled, then Grounded AUX From end SC(TRAN) FILTER 12V [A/B] = 6.0V OUT 12MV [A/B] = –6.0V OUT 3V [A/B] = 1.65V OUT 5V [A/B] = 2.5V OUT 5V [A/B] = 1.65V OUT MIC2590B-2 with C = 10nF, GATE V – 200mV IN SENSE [A/B] = 0V, Note 5 AUX 12V [A/B] = 0V, Note 5 OUT 12MV [A/B] = 0V, Note 5 OUT 8 Min Typ Max 0.8 0.4 2.1 40 ± ...
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... Parameter T Delay from 3V[A/B] overcurrent-limit PROP(3VFAULT) to FAULT Output T Delay from 5V[A/B] overcurrent-limit PROP(5VFAULT) to FAULT Output t ON[A/B], AUXEN[A/B] Pulse Width W t MIC2590B Power-On Reset Time POR after V becomes valid STBY 8-Bit Analog to Digital Converter Symbol Parameter Total Unadjusted Error Voltage, All Outputs Current, 3V [A/B]/5V OUT Current, V ...
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... MIC2590B Timing Diagrams SCL t 4 SDA Data In SDA Data Out V THFAST 3VGATE/5VGATE I THFAST I LIM12[M] I OUT t OFF12[M] Figure 3. +12V/–12V Current Limit Response Timing MIC2590B Figure 1. SMBus Timing V THFAST t OFF35 Figure 2. 3V/5V Current Limit Response Timing I OUT(AUX) I SC(TRAN) I LIMAUX I OUT(AUX) ...
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... SMI, or can employ the HPI for power control while continuing to use the SMI for access to all but the power control registers. In addition to the basic power control features of the MIC2590B accessible by the HPI, the SMI also gives the host access to the following information from the part: 1 ...
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... VSTBY is present. Prior to entering standby mode, ONA and ONB (or the MAINA and MAINB bits in the Control Registers) inputs should be de-asserted. If this is not done, the MIC2590B will assert /FAULT, and also /INT if interrupts are enabled, when the MIC2590B detects an undervoltage condition on a supply input. ...
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... Table 3. These address bits are assigned only during power up of the VSTBY supply input. These three bits allow up to eight MIC2590B devices in a single system. These pins are either grounded or left unconnected to specify a logical respectively. A pin designated as a logical 1 may also be pulled up to VSTBY ...
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... Control Register Slot A CNTRLB Control Register Slot B STATA Slot A Status STATB Slot B Status STAT Common Status Register Table 4. MIC2590B Register Addresses MIC2590B Target Register R/W = READ ACKNOWLEDGE x Slave to master transfer, i.e., DATA driven by slave. Figure 7. READ_BYTE Protocol Figure 8 ...
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... Always Read As Zero Reserved Always Read As Zero Reserved Always Read As Zero Reserved Always Read As Zero MAIN Enable Control OFF Slot B VAUX Enable Control OFF Slot 0000 0011 = 03 b Micrel D[1] D[0] MAINA VAUXA threshold) UVTH h h D[1] D[0] MAINB VAUXB threshold) UVTH h h MIC2590B ...
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... Note 2. The FAULT bits, and the /FAULT pins, are not active when the MIC2590B power paths are controlled by the System Management Interface (SMBus). When using SMI power path control for a slot, the AUXEN and ON pins for that slot must be tied to ground. ...
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... Slot B GPIA General Purpose Input, State of GPIA pin Slot A INTMSK Interrupt Mask 0 = /INT generation is enabled /INT generation is disabled. The MIC2590B does not participate in the SMBus Alert Response Address (ARA) Protocol. UV_INT Undervoltage Set whenever a circuit Interrupt breaker fault condition occurs as a result of an ...
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... The current limit threshold voltage (the “trip point”) for the MIC2590B may be as low as 35mV, which would equate to a sense resistor value of 35mΩ/I LOAD(CONT) numbers through for the case where the value of the sense resistor is 3% high, this yields: Ω ...
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... MOSFET down 19 for the output in LOAD(CONT, MAX noted in “MOSFET Maximum On-State with increasing die temperature. Again, use ON of 7.6A: DRAIN ( ) 2 2 ≅ × = × R 7.6A 9.05m DRAIN ON ) for which the θ(JA) Micrel at ON Ω ≅ 0.523W MIC2590B ...
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... Then, reading up from the X-axis at the point where “Square Wave Pulse Duration” is equal to 0.1sec (=100ms), we see that the effective thermal impedance of this MOSFET MIC2590B In terms related directly to the specification and use of power MOSFETs, this is known as “transient thermal impedance.” ...
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... This is especially true given the speeds of moden logic families, such as the 1.2 micron CMOS used in the MIC2590B. In particular, the –12V supply should have less than 100mV of peak-to-peak noise at frequencies of 1MHz or higher. This is because the –12V supply is the most negative potential applied to the IC, and is therefore connected to the device's substrate ...
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... Schottky diode. The diode’s anode should be physically placed directly at the –12V input to the MIC2590B, and its cathode should have as short a path as possible back to the part’s ground. A good SMT part for this application is ON Semiconductor’s type MBRS140T3 (1A, 40V) ...
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... MIC2590B Package Information August 2002 48-Pin TQFP (BTQ) 23 Micrel MIC2590B ...
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... This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel, Inc. MIC2590B + 1 (408) 944-0970 http://www ...