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SC4525ASETRT Datasheet(PDF) 4 Page - Semtech Corporation |
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SC4525ASETRT Datasheet(HTML) 4 Page - Semtech Corporation |
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4 / 19 page  SC4525A 4 Parameter Conditions Min Typ Max Units Minimum Switch On-time 50 ns Minimum Switch Off-time 00 50 ns Switch Leakage Current 0 µA Minimum Bootstrap Voltage I SW = -3.9A .8 2.3 V BST Pin Current I SW = -3.9A 00 50 mA Oscillator Switching Frequency R OSC = 2.kΩ .04 .3 .56 MHz R OSC = 93.kΩ 240 300 360 kHz Foldback Frequency R OSC = 2.kΩ, VFB = 0 0 230 350 kHz R OSC = 93.kΩ, VFB = 0 50 0 70 Soft Start and Overload Protection SS/EN Shutdown Threshold 0.2 0.3 0.4 V SS/EN Switching Threshold V FB = 0 V .0 .3 .3 V Soft-start Charging Current V SS/EN = 0 V .7 µA V SS/EN = .5 V .2 2.0 2.8 Soft-start Discharging Current .5 µA Hiccup Arming SS/EN Voltage V SS/EN Rising 2.5 V Hiccup SS/EN Overload Threshold V SS/EN Falling .9 V Hiccup Retry SS/EN Voltage V SS/EN Falling 0.6 .0 .2 V Over Temperature Protection Thermal Shutdown Temperature 65 °C Thermal Shutdown Hysteresis 0 °C Note : Switch current limit does not vary with duty cycle. Electrical Characteristics (Cont.) Unless otherwise noted, V IN = 2V, VBST = 5V, VSS = 2.2V, -40°C < TA = TJ < 25°C, ROSC = 2.kΩ. |
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