전자부품 데이터시트 검색엔진 |
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LM3544M-L 데이터시트(PDF) 4 Page - National Semiconductor (TI) |
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LM3544M-L 데이터시트(HTML) 4 Page - National Semiconductor (TI) |
4 / 13 page AC Electrical Characteristics Limits are for T J = 25˚C and VIN = 5.0V. Symbol Parameter Conditions Min Typ Max Units t r OUT x Rise Time (Note 5) C L = 33 µF, ILOAD = 500 mA 1.5 ms t f OUT x Fall Time (Note 6) C L = 33 µF, ILOAD = 500 mA 0.9 ms t ON Turn-on Delay (Note 7) C L = 33 µF, ILOAD = 500 mA 2.9 ms t OFF Turn-off Delay (Note 8) C L = 33 µF, ILOAD = 500 mA 0.7 ms t F Flag Delay (Note 9) I FLAG =10mA 7 ms Note 5: Time for OUTx to rise from 10% to 90% of its enabled steady-state value after ENx (ENx) is asserted. Note 6: Time for OUTx to fall from 10% to 90% of its enabled steady-state value after ENx (ENx) is deasserted. Note 7: Time between ENx rising through VIH (ENx falling through VIL) and OUTx rising through 90% of its enabled steady-state voltage. Note 8: Time between ENx falling through VIL (ENx rising through VIH) and OUTx falling through 10% of its enabled steady-state voltage. Note 9: Time between ENx rising through VIN (ENx falling through VIN) and FLAGX falling through 0.3V when OUTX is connected to GND. Pin Description Pin Number Pin Name Pin Function 2, 6 IN 1, 2 Supply Inputs: These pins are the inputs to the power switches and the supply input for the IC. In most applications they are connected together externally and to a single input voltage supply. 1, 5 GND 1, 2 Grounds: Must be connected together and to a common ground. 15, 14, 11, 10 OUT 1, 2, 3, 4 Switch Outputs: These pins are the outputs of the high side switches. 3, 4, 7, 8 LM3544-H: EN 1, 2, 3, 4 (LM3544-L: EN 1, 2, 3, 4) Enable (Inputs): Active-high (or active-low) logic enable inputs. 16, 13, 12, 9 FLAG 1, 2, 3, 4 Fault Flag (Outputs): Active-low open drain outputs. Indicates over-current, UVLO or thermal shutdown. See ″Application Information″ section for more details. www.national.com 4 |
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