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MAX17574ATG+ Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX17574ATG+ Datasheet(HTML) 4 Page - Maxim Integrated Products |
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4 / 20 page  (VIN = VEN/UVLO = 24V, RRT = 40.2KΩ (fSW = 500kHz), CVCC = 2.2µF, VSGND = VPGND = VMODE/SYNC = VEXTVCC = 0V, VFB = 1V, LX = SS = CF = RESET = OPEN, VBST to VLX = 5V, TA = -40°C to 125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise noted.) (Note 2) Note 2: All limits are 100% tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization. Electrical Characteristics (continued) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS CURRENT LIMIT Peak Current Limit Threshold IPEAK-LIMIT 4.4 5.25 5.85 A Runaway Current Limit Threshold IRUNAWAY- LIMIT 4.9 5.8 6.7 A Valley Current-Limit Threshold IVALLEY-LIMIT MODE/SYNC = OPEN or MODE/ SYNC = VCC -0.25 0 +0.25 A Valley Current-Limit Threshold IVALLEY-LIMIT MODE/SYNC = SGND -1.8 A PFM Current-Limit Threshold IPFM MODE/SYNC = OPEN 0.575 0.725 0.9 A RT/SYNC Switching Frequency FSW RRT = 40.2KΩ 475 500 525 kHz RRT = OPEN 460 500 540 kHz RRT = 8.06KΩ 1950 2200 2450 kHz RRT = 210KΩ 90 100 110 kHz VFB Undervoltage Trip Level to Cause HICCUP VOUT-HICF 0.56 0.58 0.65 V HICCUP Timeout 32768 Cycles Minimum On-Time tON_MIN 60 80 ns Minimum off-Time tOFF_MIN 140 160 ns LX Dead Time 5 ns RESET RESET Output Level Low IRESET = 10mA 400 mV RESET Output Leakage Current TA = TJ = 25°C, VRESET = 5.5V -0.1 +0.1 µA FB Threshold for RESET Deassertion VFB-OKR VFB rising 93.8 95 97.8 % FB Threshold for RESET Assertion VFB-OKF VFB falling 90.5 92 94.6 % RESET De-Assertion Delay After FB Reaches 95% Regulation 1024 Cycles THERMAL SHUTDOWN Thermal Shutdown Threshold TSHDNR Temp rising 165 °C Thermal Shutdown Hysteresis TSHDNHY 10 °C MAX17574 4.5V–60V, 3A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation www.maximintegrated.com Maxim Integrated │ 4 |
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