MIC2341R-2YTQ Micrel Inc, MIC2341R-2YTQ Datasheet
MIC2341R-2YTQ
Specifications of MIC2341R-2YTQ
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MIC2341R-2YTQ Summary of contents
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... Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. ___________________________________________________________________________________________________________ PCI Express is a registered trademark of the PCI SIG Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 ( October 2007 MIC2341/2341R Dual-Slot PCI Express Hot-Plug ...
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... Micrel, Inc. Ordering Information Part Number Latch Off MIC2341–2YTQ MIC2341R–2YTQ (1) MIC2341–3YTQ MIC2341R–3YTQ (1) MIC2341–5YTQ MIC2341R–5YTQ Note: 1. Contact factory for availability October 2007 12V and 3V Fast-Trip Auto-Retry Thresholds 100mV (1) 150mV (1) Disabled 2 MIC2341/2341R 3.3VAUX Nominal Package Current Limit ...
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Micrel, Inc. Typical Application October 2007 3 MIC2341/2341R M9999-102507-A (408) 944-0800 ...
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Micrel, Inc. Pin Configuration October 2007 4 MIC2341/2341R M9999-102507-A (408) 944-0800 ...
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Micrel, Inc. Pin Description Pin Number Pin Name 5 12VINA 32 12VINB 12 3VINA 25 3VINB 16 3VOUTA 21 3VOUTB 10 12VOUTA 27 12VOUTB 8 12VSENSEA 29 12VSENSEB 13 3VSENSEA 24 3VSENSEB 3 12VGATEA 24 12VGATEB October 2007 Pin Function ...
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Micrel, Inc. Pin Description (cont.) Pin Number Pin Name 14 3VGATEA 23 3VGATEB 11 VSTBYA 26 VSTBYB 15 VAUXA 22 VAUXB 44 ONA 43 ONB 45 AUXENA 42 AUXENB 2 CFILTERA 35 CFILTERB 6 /PWRGDA 31 /PWRGDB October 2007 Pin ...
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Micrel, Inc. Pin Description (cont.) Pin Number Pin Name 1 /FAULT_MAINA 36 /FAULT_MAINB 4 /CRSWA 39 /CRSWB 48 /FAULT_AUXA 37 /FAULT_AUXB 9 /FORCE_ONA 28 /FORCE_ONB October 2007 Pin Function /FAULT_MAIN[A/B] Outputs are open-drain, asserted active-LOW digital outputs that are normally ...
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Micrel, Inc. Pin Description (cont.) Pin Number Pin Name 47 /DLY_PWRGDA 40 /DLY_PWRGDB 46 SYSPWRGD 38 /INT 17 AGND October 2007 Pin Function /DLY_PWRGD[A/B] are open-drain, asserted active-LOW digital outputs that are ...
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Micrel, Inc. Absolute Maximum Ratings 12VIN[A/B], 12VSENSE[A/B], 12VGATE[A/B], 12VOUT[A/B] .................................................... 14V 3VIN[A/B], 3VSENSE[A/B], 3VGATE[A/B], 3VOUT[A/B], VSTBY[A/B], VAUX[A/B] ...................... 7V Digital Inputs ON[A/B], AUXEN[A/B], /CRSW[A/B], /FORCE_ON[A/B] .................. –0.5V (min) to 3.6V (max) CFILTER[A/B], RFILTER[A&B]................................... 7V Output Current /PWRGD[A/B], /DLY_PWRGD[A/B] /FAULT_MAIN[A/B], SYSPWRGD, ...
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Micrel, Inc. DC Electrical Characteristics 12V = 12V 3.3V, V IN[A/B] IN[A/B] over the full operating temperature range from 0°C < T Symbol Parameter V 3VGATE[A/B] Voltage GATE(3V) I 3VGATE[A/B] Charge Current GATE(3VCHARGE) I 3VGATE[A/B] Pull-down Current GATE(3VSINK) ...
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Micrel, Inc. Symbol Parameter I Digital Output Off-State Leakage LKG(OFF) Current /FAULT_AUX[A/B], /INT, /FAULT_MAIN[A/B], /PWRGD[A/B], SYSPWRGD /DLY_PWRGD[A/B] R Internal Pull-up Resistors to PULLUP VSTBY[A] [/CRSW[A/B],ON[A/B], AUXEN[A/B]] I Internal Pull-up Current to PULLUP VSTBY[A] [/FORCE_ON[A/B]] R Internal VAUX[A/B] Power DS(AUX) MOSFET ...
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... Assertion /DLY_PWRGD Delay after /PWRGD[A/B] Assertion t Internal Primary OC Detector DFLT Response Time (MIC2341 and MIC2341R) t Auto Retry Period AUTO RETRY (MIC2341R only) Notes: 1. Exceeding measurements given within the “Absolute Maximum Ratings” section may damage the device. 2. The device is not guaranteed to function outside of the measurements given in the “Operating Ratings” section. ...
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Micrel, Inc. Timing Diagrams V October 2007 V – SENSE V THFAST V THILIMIT 12VGATE 0V t OFF(12V) Figure 1. 12V Current Limit Response Timing – SENSE V THFAST V THILIMIT 3VGATE 0V t OFF(3V) Figure ...
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Micrel, Inc. October 2007 I SC(TRAN LIM(AUX) I OUT(AUX) t SC(TRAN) 0 Figure 4. VAUX Current Limit Response Timing 14 MIC2341/2341R t M9999-102507-A (408) 944-0800 ...
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... Micrel, Inc. Functional Diagram October 2007 MIC2341/MIC2341R Block Diagram 15 MIC2341/2341R M9999-102507-A (408) 944-0800 ...
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Micrel, Inc. Typical Characteristics October 2007 16 MIC2341/2341R M9999-102507-A (408) 944-0800 ...
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Micrel, Inc. Typical Characteristics (cont.) October 2007 17 MIC2341/2341R M9999-102507-A (408) 944-0800 ...
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Micrel, Inc. Functional Description Hot Swap Insertion When circuit boards are inserted into systems carrying live supply voltages (“hot-plugged”), high inrush currents often result due to the charging of bulk capacitance that resides across the circuit board’s supply pins. This ...
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Micrel, Inc. dV 12VGATE[ × INRUSH(12V OUT[A/B LOAD(12VOU T[A/B]) = × I GATE(12VSN K) C ISSP For the same p-channel power MOSFET in the previous example 1700pF and C ISSP 100µF, ...
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... Digital Outputs.” Power-Down Cycle When a slot is turned off, resistors internal to the MIC2341/MIC2341R are connected to each of the outputs to provide a discharge path for capacitors connected to the part’s outputs. The nominal output discharge resistance values for each rail are found in the “ ...
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... FAULT condition, the MIC2341 remains latched-off awaiting system intervention (by toggling ON[A/B] and/or AUXEN[A/B] and/or cycling the input power supplies). Internal to the MIC2341R only, a second, or auto-retry, delay counter is initiated and commences a count-up to approximately 820 ms to allow the external power MOSFET to cool before attempting another power-up sequence ...
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... Once the internal digital filter delay counter terminates, the circuit breaker trips off the previous case, the MIC2341 latches off and the MIC2341R initiates the auto-retry delay counter to count up to 820ms before attempting another power-up cycle. 22 MIC2341/2341R ...
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... Micrel, Inc. Figure 7. MIC2341R Auto-Retry Timing Diagram and Operation in Current-limit Thermal Shutdown The internal VAUX[A/B] MOSFETs are protected against damage not only by current overtemperature protection as overcurrent condition on either VAUX[A] or VAUX[B] raise the junction temperature of the MIC2341 to 140°C, all of the outputs for that corresponding slot (including VAUX) will be shut off and that slot’ ...
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Micrel, Inc. external 10kΩ resistor to V STBY Each /PWRGD[A/B] output is asserted when a slot has been enabled and has successfully begun delivering power to its respective +12V, +3.3V, and VAUX outputs. The /DLY_PWRGD[A/B] outputs are asserted 164ms after ...
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... Table 1. SYSPWRGD Truth Table are already asserted after POR, the corresponding /CRSW[A/B] control signal should be used to enable the slot’s gate drive circuits to initiate a power-up sequence. For example, in order for the MIC2341/MIC2341R to switch on the VAUX supply for either slot, the pins (/CRSW[A/B], ...
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Micrel, Inc. Figure 9. MIC2341 Output Signals’ Shutdown Responses During AUX and MAIN Overcurrent Faults October 2007 26 MIC2341/2341R M9999-102507-A (408) 944-0800 ...
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Micrel, Inc. Slot[A/B] Fault Reporting The MIC2341’s /FAULT_MAIN[A/B] open-drain digital output are activated after power-on-reset and become asserted when: The ON[A/B] input signals are asserted, AND • The 12VIN[A/B] or the voltages is less than its respective ULVO threshold, OR ...
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Micrel, Inc. Applications Information Sense Resistor Selection The 12V and the 3.3V supplies employ internal current sensing circuitry to detect overcurrent conditions that may trip the circuit breaker. An external sense resistor is used to monitor the current that passes ...
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Micrel, Inc. wide enough to allow the current to flow while the rise in temperature for a given copper plate (e.g., 1oz. or 2oz.) is kept to a maximum of 10°C to 25°C. The return (or power ground) trace should ...
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Micrel, Inc. Figure 14. Suggested PCB Layout for Sense Resistor, Power MOSFET, and Capacitors October 2007 30 MIC2341/2341R M9999-102507-A (408) 944-0800 ...
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Micrel, Inc. MOSFET and Sense Resistor Vendors Device types, part numbers, and manufacturer contact information for power MOSFETs and sense resistors are provided in Table 2. Some of the recommended MOSFETs include a metal (tab) heat sink on the bottom ...
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Micrel, Inc. Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. ...