MAX5957 MAXIM [Maxim Integrated Products], MAX5957 Datasheet
MAX5957
Related parts for MAX5957
MAX5957 Summary of contents
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... After an overcurrent fault condition, the MAX5957L/MAX5958L latch off while the MAX5957A/ MAX5958A automatically restart after a restart time delay. The MAX5957/MAX5958 are offered in latch-off or auto- restart versions (see the Selector Guide ). The MAX5957/MAX5958 are available in a 56-pin TQFN package and operate over the -40°C to +85°C temper- ature range ...
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Triple PCI Express, Hot-Plug Controllers ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) 12VIN......................................................................-0.3V to +14V 12G_ ..........................................................-0. 12S_+, 12S_-, 3.3G_ ..............................-0. 3.3VAUXIN, ON_, FAULT_, PWRGD_.......................-0.3V to +6V PGND ....................................................................-0.3V to +0.3V All ...
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... SOURCE Referred 3.3AUXIN 3.3G_ V PGTH3.3 (Note 2) V 3.3AUXIN V rising 3.3VAUXIN Hysteresis V = 3.6V 3.3VAUXIN I = 375mA (MAX5957) 3.3VAUXO I = 550mA (MAX5958) 3.3VAUXO 3.3VAUXO_ shorted to GND (Note 2) PGTH3.3AUX Rising edge Hysteresis = 3.3V, PWRGD_ = FAULT_ = PORADJ = = V FON_ = T = -40°C to +85°C, unless otherwise A J MIN TYP ...
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Triple PCI Express, Hot-Plug Controllers ELECTRICAL CHARACTERISTICS (continued 12V, V 12VIN 12S_+ 12S_- 3.3S_+ TIM = OUTPUT_ = 12G_ = 3.3G_ = OPEN, INPUT_ = PRES-DET_ = PGND = GND, T noted. Typical values ...
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... ON_ THRESHOLD 1.45 1.40 AUXON_ THRESHOLD 1.35 1.30 1.25 1.20 85 -40 - TEMPERATURE (°C) 12G_ AND 3.3G_ GATE DISCHARGE CURRENT vs. TEMPERATURE 180 175 170 3.3G_ 165 160 12G_ 155 150 -40 - TEMPERATURE (°C) AUXILIARY CURRENT LIMIT vs. TEMPERATURE 1.00 0.90 0.80 0.70 MAX5958 0.60 0.50 MAX5957 0.40 0.30 0.20 0. -40 - TEMPERATURE (° ...
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... VOLTAGE 2V/div PWRGD_ 2V/div AUXON_ 2V/div 40ms/div FAULT CONDITION ON 12V MAIN OUTPUT (AUTORESTART OPTION) MAX5957 toc16 R STEP TO 1.5Ω LOAD 12V OUTPUT CURRENT 5A/div 12G_ 20V/div 12V OUTPUT VOLTAGE 10V/div t FAULT_ RESTART 5V/div 100ms/div MAX5957 toc12 12V OUTPUT VOLTAGE 12G_ ON_ PWRGD_ ...
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... OPTION) MAX5957 toc18 R STEP TO 4Ω LOAD 3.3VAUXO_ OUTPUT CURRENT 500mA/div 0A 3.3VAUXO_ OUTPUT VOLTAGE 2V/div 0V FAULT_ t 2V/div RESTART 0V 100ms/div MAX5957 toc20 STEP 12V OUTPUT CURRENT t FAULT 5A/div 12G_ 20V/div 12V OUTPUT VOLTAGE 10V/div FAULT_ 5V/div 4ms/div MAX5957 toc22 R LOAD STEP TO 0.5Ω ...
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... PWRGD_ = FAULT_ = PORADJ = TIM = MAX5957 toc24 R LOAD 3.3VAUXO_ OUTPUT CURRENT t FAULT 500mA/div 3.3VAUXO_ OUTPUT VOLTAGE 2V/div MAX5958 FAULT_ 2V/div 10ms/div MAX5957 toc26 12V OUTPUT CURRENT 10A/div 12G_ 20V/div 12V OUTPUT VOLTAGE 10V/div FAULT_ 5V/div 4µs/div MAX5957 toc28 3.3V OUTPUT CURRENT 10A/div 3.3G_ 5V/div 3 ...
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... FAULT_ 5V/div = 3.3V, PWRGD_ = FAULT_ = PORADJ = TIM = AUXILIARY OUTPUT MAX5957 toc30 3.3VAUXO_ OUTPUT CURRENT 5A/div 0A 3.3VAUXO_ OUTPUT VOLTAGE 2V/div 0A FAULT_ 5V/div 4µs/div MAX5957 toc32 3.3V OUTPUT CURRENT 3.3G_ 3.3V OUTPUT VOLTAGE ON_, AUXON_ FAULT_ 4ms/div MAX5957 toc34 12V OUTPUT VOLTAGE 3.3VAUXO_ OUTPUT VOLTAGE ...
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... PWRGD_ = FAULT_ = PORADJ = TIM = FORCED-ON (ON/OFF) OPERATION MAX5957 toc36 12V OUTPUT VOLTAGE 3.3V AUXO_ OUTPUT VOLTAGE PWRGD_ FON_ 40ms/div MAX5957 toc38 INPUT_ 2V/div OUTPUT_ 2V/div 10ms/div t TIME DELAY vs. TIM RESISTOR FAULT 0 200 400 600 800 1000 R (kΩ) ...
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Triple PCI Express, Hot-Plug Controllers PIN NAME Slot B 12V Negative Current-Sense Input. Connect 12SB- to the negative side of the current-sense 1 12SB- resistor using the Kelvin-sensing technique to ensure accurate current sensing. Slot B 12V Positive Current-Sense Input. ...
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... Auxiliary Supply Input. 3.3VAUXIN is the input to a charge pump that drives the internal MOSFETs connecting 3.3VAUXIN to 3.3AUXO_. V 23, 48, 49 3.3VAUXIN logic and analog references of the MAX5957/MAX5958 and must always be connected to a supply between 3V and 3.6V. Bypass 3.3AUXIN with a 0.1µF capacitor to GND. 24, 46 PGND Power Ground. Connect externally to GND. Overcurrent Timeout Programming Input. Connect a resistor between 500Ω ...
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... The MAX5957/MAX5958 triple hot-plug controllers are designed for PCIe applications. The devices provide hot-plug control for 12V, 3.3V, and 3.3V auxiliary sup- plies for three PCIe slots. The MAX5957/MAX5958s’ logic inputs/outputs allow interfacing directly with the system hot-plug-management controller or through an SMBus with an external I/O expander. An integrated debounced attention switch and present-detect signals are included to simplify system design (Figure 1) ...
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... AUX-CHANNEL UVLO INPUT COMPARATOR AND CHIP CONTROL LOGIC ON_ AUXON_ Figure 1. Single-Channel Internal Block Diagram 14 ______________________________________________________________________________________ IN OUT 12VIN PWRGD_ FAULT_ CHARGE PUMP DEBOUNCE FAST OSCILLATOR MAX5957 CONTROL LOGIC MAIN-CHANNEL V REF CONTROL LOGIC AUX-CHANNEL FON_ PRES-DET_ 12S_ 108mV 54mV - - 5µA 12G_ µ ...
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... UVLO thresholds have been reached. Table 2 sum- marizes the logic conditions required for startup. The aux- iliary supply input powers the internal control logic and analog references of the MAX5957/MAX5958, so the main supplies cannot be enabled When an output is enabled, a programmable startup timer (t ) begins to count the startup time duration ...
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Triple PCI Express, Hot-Plug Controllers Table 2. Control Logic Truth Table ON_ AUXON_ Low Low High Low Low High High High * PRES-DET_ high-to-low transition has a 4ms delay (t V PGTH12 V V ON_,TH PGTH3.3 ...
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... A fault on the 3.3V auxiliary output shuts down all FAULT three outputs of the respective slot. The MAX5957A/MAX5958A automatically restart from a fault shutdown after the t MAX5957L/MAX5958L latch off overcurrent fault occurred on a main output, bring ON_ low for at least t (100µs) and high again to reset the fault and RESET restart the outputs ...
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... R tor between 3.3S_+ and 3.3S_- to set the current limit for the 3.3V main outputs to 20mV / R auxiliary output (3.3VAUXO_) the current limit is fixed at 450mA in the MAX5957 and 700mA in the case of the MAX5958. When the voltage across R reaches the current-limit threshold voltage, the ...
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Triple PCI Express, Hot-Plug Controllers LATCH-OFF N OPTION? N FAULT Y STILL PRESENT? ON_ TOGGLED Y t ELAPSED? HIGH ≥ LOW ≥ HIGH FAULT N Y RESET FAULT_ 3.3VAUXIN IS OK, MAIN INPUTS ARE AUXON_ IS HIGH, OK, ON_ IS ...
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... Applications Information Setting the Power-On Reset t is the time an overcurrent or overtemperature FAULT fault must remain for the MAX5957/MAX5958 to disable the main or auxiliary channels of a particular slot. Program the fault timeout period (t ing a resistor (R ) from TIM to GND. t TIM ...
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... UVLO thresholds before startup can occur. Input transients can cause the input voltage to sag below the UVLO threshold. The MAX5957/MAX5958 reject transients on the input supplies that are shorter than 4µs (typ). Because some load fault conditions can cause voltage transients to propagate to the supply inputs with dura- tion of greater than 4µ ...
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... GND PWRGD 10kΩ 3.3VAUX +3.3V PRSNT2# 22 ______________________________________________________________________________________ ONE OF THREE SLOTS SHOWN V 3.3VAUX R1 8mΩ 0.1µF 12G_ 3.3VAUXIN 12S_- 12S_+ PWRGD_ MAX5957 MAX5958 3.3VAUXO_ GND 3.3G_ 3.3S_- 3.3S_+ PRES-DET_ V 3.3VMAIN 0.1µF R2 5mΩ V 3.3VAUXIN 10kΩ MRL LEDs Typical Application Circuit V 12VMAIN 2.2µ ...
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... PWRGDB 51 FAULTB 52 3.3GB 53 3.3SB- 54 3.3SB 12GB ______________________________________________________________________________________ 28 12VIN 27 GND 26 PORADJ 25 TIM 24 PGND 23 3.3VAUXIN 22 3.3AUXOC MAX5957 21 PWRGDC MAX5958 20 FAULTC 19 3.3GC 18 3.3SC- 17 3.3SC+ 16 12GC 15 12SC THIN QFN PROCESS: BiCMOS Pin Configuration Chip Information 23 ...
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Triple PCI Express, Hot-Plug Controllers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) E E/2 D ______________________________________________________________________________________ DETAIL A e (ND- ...
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Triple PCI Express, Hot-Plug Controllers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) Maxim cannot assume responsibility for use of any circuitry other than circuitry ...