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LTM4686 Datasheet(PDF) 10 Page - Analog Devices |
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LTM4686 Datasheet(HTML) 10 Page - Analog Devices |
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10 / 132 page  LTM4681 10 Rev. 0 For more information www.analog.com ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified internal operating temperature range (Note 2). Specified as each individual output channel (Note 4). TA = 25°C, VIN = 12V, RUNn = 3.3V, RUNP = 0, FREQUENCY_SWITCH = 350kHz and VOUTn commanded to 1.000V unless otherwise noted. Configured with factory-default EEPROM settings and per Test Circuit 1, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Digital Input WP_nn IPUWP Input Pull-Up Current WP 10 µA Open-Drain Outputs SCL_nn, SDA_nn, FAULT_nn, ALERT_nn, RUNn, SHARE_CLK_nn, PGOODn VOL Output Low Voltage ISINK = 3mA 0.4 V Digital Inputs SHARE_CLK_nn, WP_nn VIH Input High Threshold Voltage l 1.5 1.8 V VIL Input Low Threshold Voltage l 0.6 1 V Digital Filtering of FAULTn IFLTG Input Digital Filtering FAULTn 3 µs Digital Filtering of PGOODn IFLTG Output Digital Filtering PGOODn 100 µs Digital Filtering of RUNn IFLTG Input Digital Filtering RUN 10 µs PMBus Interface Timing Characteristics fSCL Serial Bus Operating Frequency l 10 400 kHz tBUF Bus Free Time Between Stop and Start l 1.3 µs tHD(STA) Hold Time After Repeated Start Condition After This Period, the First Clock is Generated l 0.6 µs tSU(STA) Repeated Start Condition Setup Time l 0.6 10000 µs tSU(ST0) Stop Condition Setup Time l 0.6 µs tHD(DAT) Date Hold Time Receiving Data Transmitting Data l l 0 0.3 0.9 µs µs tSU(DAT) Data Setup Time Receiving Data 0.1 µs tTIMEOUT_SMB Stuck PMBus Timer Non-Block Reads Stuck PMBus Timer Block Reads Measured from the Last PMBus Start Event 32 255 ms tLOW Serial Clock Low Period l 1.3 10000 µs tHIGH Serial Clock High Period l 0.6 µs Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTM4681 is tested under pulsed-load conditions such that TJ ≈ TA. The LTM4681E is guaranteed to meet performance specifications over the 0°C to 125°C internal operating temperature range. Specifications over the –40°C to 125°C internal operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTM4681I is guaranteed to meet specifications over the full –40°C to 125°C internal operating temperature range. TJ is calculated from the ambient temperature TA and the power dissipation PD according the formula: TJ = TA + (PD • θJA) |
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