max5905 Maxim Integrated Products, Inc., max5905 Datasheet
max5905
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max5905 Summary of contents
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... The MAX5906–MAX5909 provide an open- drain status output, an adjustable startup timer, an adjustable current limit, an uncommitted comparator, and output undervoltage/overvoltage monitoring. The MAX5904/MAX5905 are available in 8-pin SO pack- ages. The MAX5906–MAX5909 are available in space- saving 16-pin QSOP packages. ® PCI-Express ...
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... SEN 100kΩ TIM R = 4kΩ (minimum value) TIM TIM floating for MAX5906–MAX5909 fixed for MAX5904/MAX5905 Charging +5V +10V GATE IN (Note 5) Weak discharge, during startup when current limit is active or when 0.4V < Strong discharge, triggered by a fault or when V < ...
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Low-Voltage, Dual Hot-Swap Controllers/Power ELECTRICAL CHARACTERISTICS (continued +1V to +13.2V provided at least one supply is higher than +2.7V Typical values are +5V, V IN1 IN2 PARAMETER SYMBOL V Channel 1 ON ...
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... SEN 100kΩ TIM R = 4kΩ (minimum value) TIM TIM floating for MAX5906–MAX5909 fixed for MAX5904/MAX5905 Charging +5V +10V GATE IN (Note 5) Weak discharge, during startup when current limit is active or when 0.4V < Strong discharge, triggered by a fault or when V < ...
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Low-Voltage, Dual Hot-Swap Controllers/Power ELECTRICAL CHARACTERISTICS (continued +1V to +13.2V provided at least one supply is higher than +2.7V Typical values are +5V, V IN1 IN2 PARAMETER SYMBOL ON Input Bias Current ...
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Low-Voltage, Dual Hot-Swap Controllers/Power Sequencers (Typical Operating Circuits Fairchild FDB7090L and 2 are identical in performance. Where characteristics are interchangeable, channels 1 and 2 are referred and Y.) SUPPLY CURRENT vs. ...
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Low-Voltage, Dual Hot-Swap Controllers/Power (Typical Operating Circuits Fairchild FDB7090L and 2 are identical in performance. Where characteristics are interchangeable, channels 1 and 2 are referred and Y.) GATE STRONG DISCHARGE CURRENT ...
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... Where characteristics are interchangeable, channels 1 and 2 are referred and Y.) STARTUP WAVEFORMS SLOW TURN-ON 1ms/div V = 5.0V 10mΩ SENSE C = 1000µF, C BOARD PIN NAME MAX5904/ MAX5906– MAX5905 MAX5909 — 1 PGOOD — 2 TIM 1 3 IN1 2 4 SENSE1 3 5 ...
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... MAX5906–MAX5909 from 0.4ms to 50ms (see the Setting the Startup Period, R section). The duration TIM of the startup period is fixed at 9ms for the MAX5904/ MAX5905. The startup period begins after the following three conditions are met exceeds the UVLO threshold (2.4V) for ...
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Low-Voltage, Dual Hot-Swap Controllers/Power Sequencers Figure 1. MAX5906–MAX5909 Functional Diagram 10 ______________________________________________________________________________________ ...
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... After the startup period is complete the slow compara- tor is enabled and the device enters normal operation. The comparator threshold voltage (V 25mV for the MAX5904/MAX5905 and is adjustable from 25mV to 100mV for the MAX5906–MAX5909. The slow-comparator response time decreases to a mini- mum of 110µs with a large overdrive voltage (Figure 9). ...
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Low-Voltage, Dual Hot-Swap Controllers/Power Sequencers V ON_,TH Figure 3. Power-Up with ON Pin Control (At Least One V 12 ______________________________________________________________________________________ t START t PGDLY is > IN_ UVLO Timing Diagrams GATE_ V OUT_ INTERNAL SIGNAL ...
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Low-Voltage, Dual Hot-Swap Controllers/Power OVERCURRENT CONDITION ≥ AND IN_ SENSE_ SC_TH < IN_ SENSE_ FC_TH Figure 4. Power-Down when an Overcurrent Fault Occurs SHORT-CIRCUIT CONDITION ≥ ...
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Low-Voltage, Dual Hot-Swap Controllers/Power Sequencers UV/OV CONDITION Figure 6. Power-Down when an Undervoltage/Overvoltage Fault Occurs (MAX5906/MAX5907) UV/OV CONDITION Figure 7. Fault Report when an Undervoltage/Overvoltage Fault Occurs (MAX5908/MAX5909) 14 ______________________________________________________________________________________ Timing Diagrams (continued) MON_ GLITCH FILTER, 20µS DISCHARGE RATE DEPENDS ...
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Low-Voltage, Dual Hot-Swap Controllers/Power V UVLO t D,UVLO Figure 8. Power-Up with Undervoltage Lockout Delay (V ______________________________________________________________________________________ Timing Diagrams (continued) t START t PGDLY = 2.7V, the Other V is Below V ON IN_ UVLO Sequencers V IN_ V GATE_ ...
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... Choose the sense resistor power rating to be greater than (I OVERLOAD The slow-comparator threshold voltage of the MAX5904/MAX5905 is fixed at 25mV and adjustable from 25mV to 100mV for the MAX5906–MAX5909. The adjustable slow-comparator threshold of the MAX5906–MAX5909 allows designers to fine-tune the current-limit threshold for use with standard value sense resistors ...
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... TH voltage. Setting the Startup Period, R The startup period ( the MAX5904/MAX5905 is START fixed at 9ms, and adjustable from 0.4ms to 50ms for the MAX5906–MAX5909. The adjustable startup period of the MAX5906–MAX5909 systems can be customized for MOSFET gate capacitance and board capacitance (C ) ...
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Low-Voltage, Dual Hot-Swap Controllers/Power Sequencers Q is the MOSFET total gate charge GATE I is the gate charging/discharging current GATE In this case, the inrush current depends on the MOSFET gate-to-drain capacitance (C ) plus any additional rss capacitance from ...
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... The single turn-on with the device latched after a C GATE GATE fault (MAX5905/MAX5907/MAX5909) 2) The continuous automatic retry after a fault (MAX5904/MAX5906/MAX5908) MOSFET manufacturers typically include the package thermal resistance from junction to ambient (R thermal resistance from junction to case (R ...
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... When the output is short circuited, the voltage drop across the external MOSFET becomes large. Hence, the power dissipation across the switch increases, as does the die temperature. An efficient way to achieve 20 ______________________________________________________________________________________ R SENSE1 IN1 SENSE1 MAX5904 1 MAX5905 GND IN2 SENSE2 R SENSE2 ON2 ON1 ...
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... IN SENSE GATE MAX590_ OPTIONAL COMPONENTS (SEE THE ON COMPARATOR SECTION). Figure 13. Using the MAX5904–MAX5909 on a Backplane PART MAX5904ESA/MAX5904USA MAX5905ESA/MAX5905USA MAX5906EEE/MAX5906UEE MAX5907EEE/MAX5907UEE MAX5908EEE/MAX5908UEE MAX5909EEE/MAX5909UEE ______________________________________________________________________________________ µP RESET Figure 14. Kelvin Connection for the Current-Sense Resistors REMOVABLE CARD WITH NO HOT-INSERTION Pin Configurations (continued) PROJECTION ...
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... GND V 2 BACKPLANE REMOVABLE CARD STAT GND V 2 *OPTIONAL COMPONENTS 22 ______________________________________________________________________________________ R SENSE1 0.1µF IN1 SENSE1 * ON * MAX5904 MAX5905 GND IN2 SENSE2 0.1µF R SENSE2 *OPTIONAL COMPONENTS R SENSE1 0.1µF IN1 SENSE1 ON * PGOOD * TIM MAX5906 MAX5907 * LIM1 MAX5908 MAX5909 * LIM2 GND IN2 SENSE2 0.1µ ...
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Low-Voltage, Dual Hot-Swap Controllers/Power (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages TOP VIEW FRONT VIEW ______________________________________________________________________________________ E H ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products Package Information (continued registered trademark of Maxim Integrated Products, Inc. ...