max5956 Maxim Integrated Products, Inc., max5956 Datasheet
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max5956
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max5956 Summary of contents
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... Rev 0; 9/05 Controllers with Independent On/Off Control General Description The MAX5955 and MAX5956 are +1V to +13.2V dual hot-swap controllers with independent on/off control for complete protection of dual-supply systems. They allow the safe insertion and removal of circuit cards into live backplanes. The MAX5955 and MAX5956 operate down to 1V provided one of the inputs is above 2 ...
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Low-Voltage, Dual Hot-Swap Controllers with Independent On/Off Control ABSOLUTE MAXIMUM RATINGS IN_ to GND...........................................................................+14V GATE_ to GND ...........................................-0. ON_, PGOOD_, TIM to GND.......................-0.3V to the higher 0.3V) and (V IN1 SENSE_, MON_, LIM_ to GND ...
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... SHUTDOWN LATCH/RESTART Autoretry Delay Note 1: All devices are 100% tested at T Note 2: The MAX5955/MAX5956 slow-comparator threshold is adjustable. V Operating Characteristics). Note 3: The current-limit slow-comparator response time is weighted against the amount of overcurrent; the higher the overcurrent condition, the faster the response time (see the Typical Operating Characteristics). ...
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Low-Voltage, Dual Hot-Swap Controllers with Independent On/Off Control (Typical Operating Circuits Fairchild FDB7090L, V otherwise noted. Channels 1 and 2 are identical in performance. Where characteristics are interchangeable, channels 1 and 2 are referred to as ...
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Low-Voltage, Dual Hot-Swap Controllers with (Typical Operating Circuits Fairchild FDB7090L, V otherwise noted. Channels 1 and 2 are identical in performance. Where characteristics are interchangeable, channels 1 and 2 are referred and Y.) ...
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... PGOOD2 asserts low during startup, when V low, when channel 2 is off, or when channel 2 has any fault condition. Detailed Description The MAX5955 and MAX5956 are circuit breaker ICs for hot-swap applications where a line card is inserted into a live backplane. The MAX5955 and MAX5956 operate down to 1V provided one of the inputs is above 2 ...
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Low-Voltage, Dual Hot-Swap Controllers with Figure 1. Functional Diagram _______________________________________________________________________________________ Independent On/Off Control 7 ...
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... MOSFET gates with a strong 3mA pulldown cur- rent in response to a fault condition. After a fault, PGOOD_ is pulled low, the MAX5955B and MAX5956B stay latched off and the MAX5955A and MAX5956A automatically restart. The slow comparator is disabled during the startup period while the external MOSFETs are turning on ...
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... PGOOD_ of the channel experiencing the fault pulls low. Thus the fault is reported on the channel with . The MAX5955/ the problem, but the MAX5956 does not allow an output overvoltage/undervoltage fault to disrupt operation by shutting down the channels. The MAX5956’s PGOOD_ output immediately goes high impedance after the out- D,UVLO put overvoltage/undervoltage fault is removed ...
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... MOSFET Thermal Considerations section). Using the MAX5955B/MAX5956B in latched mode allows the use of MOSFETs with lower power ratings. A MOSFET typically withstands single-shot pulses with higher dissi- pation than the specified package rating. Table 3 lists some recommended manufacturers and components ...
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... Fairchild FDB7030L MOSFET If V IN1 V DRIVE data sheet specifies that the FDB7030L has approxi mately 60nC of gate charge and C MAX5955/MAX5956 have a 100µA gate-charging cur longer than t ON rent and a 3mA strong discharging current small, the R PULLUP ...
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... If the main system power supply collapses 0 096 . ms below UVLO, the MAX5955/MAX5956 force the device to restart once the supply has recovered. The MOSFET is turned off in a very short time resulting in a high di/dt. The ) BOARD backplane delivering the power to the external card must have low inductance to minimize voltage transients caused by this high di/dt ...
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... Place the MAX5955/ MAX5956 close to the card’s connector, and a 0.01µF capacitor to GND should be placed as close as possible to each V pin. Use a ground plane to minimize imped- IN ance and inductance ...
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... TEMP RANGE MAX5956AEEE -40°C to +85°C MAX5956AEEE+ -40°C to +85°C MAX5956AUEE 0°C to +85°C MAX5956AUEE+ 0°C to +85°C MAX5956BEEE -40°C to +85°C MAX5956BEEE+ -40°C to +85°C MAX5956BUEE 0°C to +85°C MAX5956BUEE+ 0°C to +85°C +Denotes lead-free package. 14 ______________________________________________________________________________________ Q1 IN1 SENSE1 GATE1 ON1 * ...
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... Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2005 Maxim Integrated Products Quijano Independent On/Off Control Printed USA is a registered trademark of Maxim Integrated Products, Inc. Package Information PACKAGE OUTLINE, QSOP .150", .025" LEAD PITCH 1 21-0055 E ...