MIC2595-2BM Micrel Inc, MIC2595-2BM Datasheet
MIC2595-2BM
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MIC2595-2BM Summary of contents
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... MIC2589-2BM MIC2589-2YM MIC2589R-1BM MIC2589R-1YM MIC2589R-2BM MIC2589R-2YM MIC2595-1BM MIC2595-1YM MIC2595-2BM MIC2595-2YM MIC2595R-1BM MIC2595R-1YM MIC2595R-2BM MIC2595R-2YM Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com December 2005 Single-Channel, Negative High-Voltage Hot ...
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Typical Applications -48V RTN (Long Pin) *D1 SMAT70A R1 R2 689k 11. -48V RTN (Short Pin) C1 0.47µF R3 12.4k 1% -48V RTN (Long Pin) Nominal Undervoltage and Overvoltage Thresholds: V =36. =71.2V OV Overcurrent TImer ...
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... Pin Configuration 14-Pin SOIC MIC2589-1BM MIC2589R-1BM MIC2589-1YM MIC2589R-1YM 14-Pin SOIC MIC2595-1BM MIC2595R-1BM MIC2595-1YM MIC2595R-1YM December 2005 14-Pin SOIC MIC2589-2BM MIC2589R-2BM MIC2589-2YM MIC2589R-2YM 14-Pin SOIC MIC2595-2BM MIC2595R-2BM MIC2595-2YM MIC2595R-2YM 3 M9999-120505 (408) 955-1690 ...
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... Power-Good Output 1: Asserted when the voltage on the DRAIN pin ( VEE, indicating that the output voltage is within proper specifications. For PGTH the MIC2589-1 and MIC2595-1, PWRGD1 will be high impedance when V less than V , and will pull-down to V PGTH the MIC2589-2 and MIC2595-2, /PWRGD1 will pull-down to V ...
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Pin Desription (cont.) Pin Number Pin Name 12 PWRGD2 (MIC25XX-1) 12 /PWRGD2 (MIC25XX-2) 13 PWRGD3 (MIC25XX-1) 13 /PWRGD3 (MIC25XX-2) 14 VDD December 2005 Pin Function Power-Good Output 2: Asserted when the following is true: (PWRGD1 = Asserted) AND (Time after ...
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... CFILTER CFILTER Discharge Current High Threshold Voltage V CFILTER(TRIP) Overcurrent Detect Timer V Voltage on CFILTER CFILTER(RETRY) (decreasing) to Trigger Auto- Retry (MIC2589R and MIC2595R) I PGTIMER Charge Current PGTIMER December 2005 (1) Operating Ratings Supply Voltage (V Ambient Temperature Range (T Junction Temperature (T Package Thermal Resistance SOIC (θ ...
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... MIC2589R) UV Pin High Threshold Voltage V UVH (MIC2589 and MIC2589R Pin Hysteresis UVHYS (MIC2589 and MIC2589R Pin High Threshold Voltage ONH (MIC2595 and MIC2595R) V OFF Pin Low Threshold Voltage OFFL (MIC2595 and MIC2595R) I Input Current (OV, UV, ON, OFF CNTRL Pins) V Power-Good Threshold PGTH (V – ...
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... UV Low to GATE Low UVPHL (MIC2589 and MIC2589R) Figure High to GATE High UVPLH (MIC2589 and MIC2589R) Figure 4 OFF Low to GATE Low t OFFPHL Figure 5 (MIC2595 and MIC2595R High to GATE High ONPLH (MIC2595 and MIC2595R) Figure 5 t DRAIN Low to PWRGD1 Output PGLH1 (8) High (MIC25XX-1XX) ...
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... Figure 1. Overcurrent and Undercurrent (No Load) Response December 2005 OVERCURRENT EVENT t ≥ < t FLT FLT LIMIT 0A Load current is regulated 50mV/R LIMIT SENSE ( ( Reduction support DRAIN I = 50mV/R LIMIT SENSE Figure 2. SENSE to GATE Timing Response Figure 3. MIC2589/MIC2595 Overvoltage Response Figure 4. MIC2589/MIC2589R Undervoltage Response 9 MIC2589/MIC2595 t NLD Output OFF ( ( UVL V UVH ( ( ...
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... Micrel Figure 5a. MIC2595/MIC2595R OFF to GATE Drive Response GATE Figure 5b. MIC2595/MIC2595R ON to GATE Drive Response December 2005 1.223V t ONLH 1V Figure 6. DRAIN to Power-Good Response 10 MIC2589/MIC2595 M9999-120505 (408) 955-1690 ...
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... V OVH 1.23 1.22 V OVL 1.21 1.2 -40 - 100 TEMPERATURE (°C) PGTimer Charge Current vs. Temperature 100 PGTIMER -40 - 100 TEMPERATURE (°C) 11 MIC2589/MIC2595 GATE Drive ( GATE EE vs. Temperature -40 - 100 TEMPERATURE (°C) GATE Sink Current vs. Temperature 350 300 250 200 150 100 50 0 -40 - 100 TEMPERATURE (°C) Power-Good Threshold vs ...
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... TEMPERATURE (°C) ON Pin Threshold vs. Temperature 1.5 1.45 1.4 1.35 1.3 V 1.25 ONH 1.2 1.15 1.1 1.05 1 -40 - 100 TEMPERATURE (°C) 12 MIC2589/MIC2595 Circuit Breaker Trip Voltage vs. Temperature TRIP -40 - 100 TEMPERATURE (°C) No-Load Detect Timer Discharging Current vs. Temperature 1.4 1.2 1 0.8 ...
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... VDD R2 C TIMER 11.8k 2 PGTIMER /PWRGD3 /PWRGD2 4 OV DRAIN C FILTER 2.2µF 5 CFILTER GATE 6 CNLD SENSE C NLD 0.068µF 7 VEE N/C R SENSE 0.01 5% Test Circuit 13 MIC2589/MIC2595 R6 R7 47k 47k LOAD 0.1µ GATE SUM110N10-09 M9999-120505 (408) 955-1690 -48V RTN -48V OUT ...
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... Micrel Functional Characteristics December 2005 14 MIC2589/MIC2595 M9999-120505 (408) 955-1690 ...
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... Micrel Functional Diagram December 2005 Block Diagram 15 MIC2589/MIC2595 M9999-120505 (408) 955-1690 ...
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... When the input voltage to the controller is between the overvoltage and undervoltage threshold settings (MIC2589 greater than the ON threshold setting (MIC2595), a start cycle is initiated to deliver power to the load. During the start-up cycle, the GATE pin of the controller applies a constant charging current (45µA, nominal) to the gate of the external MOSFET, ...
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... GATE output above 5.5V (i.e., charge the output load capacitance). An initial value for C is found by calculating the FILTER time it will take for the MIC2589/MIC2595 to completely charge up the output capacitive load. Assuming the load is enabled by the PWRGDX (or /PWRGDX) signal(s) of the controller, the turn-on delay time is derived from × (dv/dt): ( × ...
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... V , the loop times out and the CNLD controller will shut down until it is reset manually (MIC2589/MIC2595) or until it performs an auto-retry operation (MIC2589R/MIC2595R). During start-up, the no-load detection circuit begins to monitor the load current and the CNLD pin starts ramping along with the GATE output ...
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... The MIC2595 and the MIC2595R devices have user- programmable hysteresis by means of the ON and OFF pins (Pins 4 and 3, respectively). This allows setting the MIC2595/MIC2595R to turn voltage V1, and not turn off until a second voltage V2, where V2 < V1. This can significantly simplify dealing with source impedances in the supply buss while at the ...
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... In addition, a sudden load dump anywhere on the circuit card can generate a very high voltage spike at the drain of the output MOSFET that will appear at the DRAIN pin of the MIC2589/MIC2595. In both cases good engineering practice to include protective measures to avoid damaging sensitive ICs or the hot swap controller from these large-scale transients ...
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RTN (Long Pin) *D1 SMAT70A R1 689k 1% -48V RTN (Short Pin) C1 0.47µF System Reset -48V RTN (Long Pin) *Optional components (See Functional Description and Applications Information for more details SOT-323, B8S138W or equivalent D2 ...
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... Is any airflow available?). The datasheet will almost always give a value of ON resistance for a given MOSFET at a gate-source December 2005 voltage of 4.5V and 10V. For MIC2589/MIC2595 applications, choose the gate-source ON resistance at 10V and call this value R MOSFET acts as an ohmic (resistive) device, almost all that’ ...
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... T J(steady-state) The use of the Transient Thermal Impedance Curves is necessary to determine the increase in junction temperature associated with a worst-case transient condition. maximum power dissipated during a short circuit event for the MIC2589/MIC2595, we calculate the transient junction temperature increase as: the peak junction T J Assume the MOSFET has been on for a long time – ...
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Y-axis scale to find the FLT intersection of the Single Pulse curve. This point is the normalized transient thermal impedance (Z and the effective transient thermal impedance is the product of R ...
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... Other Layout Considerations Figure suggested PCB layout diagram for the MIC2589/MIC2595. Many hot swap applications will require load currents of several amperes. Therefore, December 2005 the power (V be 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° ...
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Vias to bottom layer Return/Ground plane (VDD) Via to bottom layer Return/Ground plane (VDD DRAWING IS NOT TO SCALE- *See Table 1 for part numbers and vendors **Component values application specific, determined by user Trace width (W) guidelines ...
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Power-Good Signals Driving Optoisolators The PWRGDx signals can be used to drive optoisolators or LEDs. The use of an optoisolator is sometimes needed to protect I/O signals (e.g., /PWRGD, RESET, ENABLE) of both the controller and downstream DC-DC converter(s) from ...
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MOSFET and Sense Resistor Vendors Device types, part numbers, and manufacturer contacts for power MOSFTETS and sense resistors are provided in Table 1. MOSFET Vendors Key MOSFET Type(s) SUM75N06-09L (TO-263) SUM70N06-11 (TO-263) SUM50N06-16L (TO-263) Vishay - Siliconix SUP85N10-10 (TO-220AB) SUB85N10-10 ...
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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. However, no ...