MIC2590B-2YTQ Micrel Inc, MIC2590B-2YTQ Datasheet
MIC2590B-2YTQ
Specifications of MIC2590B-2YTQ
MIC2590B-2YTQ
Available stocks
Related parts for MIC2590B-2YTQ
MIC2590B-2YTQ Summary of contents
Page 1
... Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. ___________________________________________________________________________________________________________ Ordering Information Part Number Standard Pb-Free MIC2590B-2BTQ MIC2590B-2YTQ MIC2590B-5BTQ* MIC2590B-5YTQ* Note: * Contact factory for availability. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 ( September 2008 Features • ...
Page 2
... GATE R SENSE C R GATE 3VGATEA 3.3V, 7.6A 12V, 0.5A 4.7µF 4.7µF R SENSE PCI Bus R 5VGATEB 5V GATE R SENSE C GATE R 3VGATEB 3.3V, 7.6A 12V, 0.5A 3.3VAUXB 4.7µF 4.7µF Bus Switch A B /OE MIC2590B PCI Connector 12V, 0.1A 12V, 0.1A M9999-091808 ...
Page 3
... Both pins must be tied together at the chip. 12V output [A/B] –12V output [A/B] 12V Slew Rate Control [A/B]: Connect capacitors between these pins and ground to set output slew rates of the +12V and -12V supplies. 3 MIC2590B M9999-091808 ...
Page 4
... Enable input for MAIN outputs: Rising-edge sensitive. Used to enable or disable MAIN (5V, 3.3V, +12V, –12V) outputs. Taking ONA/ONB low after a fault resets the respective slot’s Main Output Fault Latch. Tie these pins to ground if using SMBus-mode power control. 4 MIC2590B and the gate of the MOSFETs GATE . Whenever an FLT ...
Page 5
... 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. General Purpose Inputs: The state of these inputs are available by reading the Common Status Register. Ground 5 MIC2590B M9999-091808 ...
Page 6
... GATE MIC2590B 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 4.7 V 2.9 ...
Page 7
... OUT 12MV [A/B] = Off, T OUT V [A/B] = Off, T AUX 12V [A/ OUT 12MV [A/ OUT 12V [A/B] (MIC2590B-2) OUT 12MV [A/B] (MIC2590B-2) OUT Current which must be drawn from V to register as a fault AUX V Enabled, then Grounded AUX 7 Min Typ 1.20 1.25 > V 1.80 2.5 ...
Page 8
... Delay from 3V[A/B] overcurrent-limit to PROP(3VFAULT) FAULT Output T Delay from 5V[A/B] overcurrent-limit to PROP(5VFAULT) FAULT Output t ON[A/B], AUXEN[A/B] Pulse Width W t MIC2590B Power-On Reset Time after POR VSTBY becomes valid 8-Bit Analog to Digital Converter Total Unadjusted Error Voltage, All Outputs Current, 3V [A/B]/5V OUT Current, V [A/B], 12V ...
Page 9
... Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF. 4. See Applications section. 5. Parameters guaranteed by design. Not 100% production tested. September 2008 Condition Figure 1 Figure 1 Figure 1 Start Condition, Figure 1 Start Condition, Figure 1 9 MIC2590B Min Typ Max Units 13.8 V 54 ...
Page 10
... Figure 3. +12V/–12V Current Limit Response Timing September 2008 Figure 1. SMBus Timing V THFAST t OFF3/5 Figure 2. 3V/5V Current Limit Response Timing I SC(TRAN) I OUT(AUX) t SC(TRAN) Figure 5. VAUX Current Limit Response Timing Must Trip I AUX(THRESH) May Not Trip I I OUT(AUX) OUT(AUX) Figure 4. VAUX Current Limit Threshold I LIM(AUX) MIC2590B I LIM(AUX) M9999-091808 ...
Page 11
... 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. Output voltage from each supply. ...
Page 12
... Thermal Shutdown The internal +12V, –12V and VAUX MOSFETs are protected against damage not only by current limiting, but by dual-mode over-temperature protection as well. Each slot controller on the MIC2590B is thermally isolated from is STBY the other. Should an overcurrent condition raise the junction temperature of one slot’s controller and internal pass elements to 140° ...
Page 13
... IPMI standard, but may be used for any desired purpose. Interrupt Generation In the MIC2590B, the /INT pin can be asserted (driven low) whenever a fault condition trips the circuit breaker. The MIC2590B can thus operate in either polled mode or interrupt mode ...
Page 14
... Figure 8. WRITE_BYTE Protocol Common Power-On Byte Value Default Write n/a n Value read from MIC2590B NOT ACKNOWLEDGE Slave to master transfer, i.e., DATA driven by slave. Value to be written to MIC2590B NOT ACKNOWLEDGE Slave to master transfer, i.e., DATA driven by slave. MIC2590B /A P STOP /A P STOP M9999-091808 ...
Page 15
... Reserved 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 B 0000 0000 0000 0011 MIC2590B Operation UVTH UVTH = D[1] D[0] read-write read-write MAINB AUXB Operation ...
Page 16
... FAULT overcurrent has occurred on both a main output and VAUX output of a slot, both ON[A/B] and AUXEN[A/B] of the corresponding slot must go LOW to reset FAULT. The FAULT bits, and the /FAULT pins, are not active when the MIC2590B power paths are controlled by the System Management Note 2. ...
Page 17
... Operation Always read as zero Always read as zero State of GPIB pin State of GPIA pin 0 = /INT generation is enabled 1 = /INT generation is disabled. The MIC2590B does not participate in the SMBus Alert Response Address (ARA) Protocol. Set whenever a circuit Interrupt breaker fault condition occurs as a result of an ...
Page 18
... 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 numbers through for the case where the value of the sense resistor is 3% high, this yields: 35mΩ ...
Page 19
... Low-voltage MOSFETs generally have low breakdown voltage ratings from gate to source as well. In MIC2590B applications, the gates of the external MOSFETs are driven from the +12V input to the IC. That supply may well be at 12V + (5% x 12V ...
Page 20
... Square Wave Pulse Duration (sec) 20 for the 5V supply FLT is 5.0A, the slow-trip LOAD(CONT,MAX × = − 5A(0.6ΩA MOSFET ( ) = × 10W for 50ms MOSFET Notes Duty Cycle Per Unit Base = R = 67°C/W qJA ( – qJA 4. Surface Mounted 1 10 100 MIC2590B ] = 2V 600 M9999-091808 ...
Page 21
... T = 82°C. The Si4430DY J J(TRANSIENT MAX) . J(MAX) = (0.7 x 67°C/W) = 4.7°C/W. θ(JA [(10W)(4.7°C/W) + 55°C] = 102°C J(PEAK MAX 7.47mΩ 0.05 0.042W RMS Web Address www.siliconix.com www.irf.com www.fairchildsemi.com Web Address www.vishay.com/docs/wsl_30100.pdf irctt.com/pdf_files/OARS.pdf irctt.com/pdf_files/LRC.pdf MIC2590B M9999-091808 ...
Page 22
... September 2008 –12V Input Clamp Diode The –12V input to the MIC2590B is the most negative potential on the part, and is therefore connected to the chip’s substrate (as described in “Power Supply Decoupling,” above). Although no particular sequencing of the – ...
Page 23
... Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully September 2008 48-Pin TQFP (TQ) indemnify Micrel for any damages resulting from such use or sale. © 2002 Micrel, Incorporated MIC2590B M9999-091808 ...