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LM3543MX-H Datasheet(PDF) 4 Page - National Semiconductor (TI) |
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LM3543MX-H Datasheet(HTML) 4 Page - National Semiconductor (TI) |
4 / 12 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 = 500mA 1.5 ms t f OUT x Fall Time (Note 6) C L = 33 µF, ILOAD = 500mA 0.9 ms t ON Turn-on Delay (Note 7) C L = 33 µF, ILOAD = 500mA 2.9 ms t OFF Turn-off Delay (Note 8) C L = 33 µF, ILOAD = 500mA 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 OUT 1, 2, 3 Switch Outputs: These pins are the outputs of the high side switches. 3, 4, 7 LM3543-H: EN 1, 2, 3 LM3543-L: EN 1, 2, 3 Enable (Inputs): Active-high (or active-low) logic enable inputs. 16, 13, 12 FLAG 1, 2, 3 Fault Flag (Outputs): Active-low open drain outputs. Indicates over-current, UVLO or thermal shutdown. 8, 9, 10 N/C No Internal Connection. www.national.com 4 |
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