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RT7258 Datasheet(PDF) 6 Page - Richtek Technology Corporation |
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RT7258 Datasheet(HTML) 6 Page - Richtek Technology Corporation |
6 / 18 page 6 DS7258-00 January 2012 www.richtek.com RT7258 © Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Parameter Symbol Test Conditions Min Typ Max Unit Sync Frequency Range fSync 0.3 -- 1.5 MHz EN Turn-Off Delay tOFF -- 10 -- μs EN Pull Low Current VEN = 2V -- 1 -- μA Thermal Shutdown TSD -- 150 -- °C Thermal Shutdown Hysteresis ΔTSD -- 20 -- °C Power Good Threshold Rising -- 0.75 -- V Power Good Threshold Hysteresis -- 40 -- mV Power Good Pin Level PGOOD Sink 10mA -- -- 0.125 V BG Driver Bias Supply Voltage VCC 4.5 5 -- V Gate Driver Sink Impedance RSink -- 0.9 -- Ω Gate Driver Source Impedance RSource -- 3.3 -- Ω Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect device reliability. Note 2. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC is measured at the exposed pad of the package. Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions. |
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