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SC415 Datasheet(PDF) 7 Page - Semtech Corporation |
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SC415 Datasheet(HTML) 7 Page - Semtech Corporation |
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7 / 30 page  SC415 7 Pin Descriptions Pin # Pin Name Pin Function 1 LX1 Switching (phase) node for VOUT1 2 BST1 Boost capacitor connection for VOUT1 high-side gate drive 3 VDD1 5V supply input for VOUT1 analog circuits and gate drive outputs. Under-voltage lockout for the 5V supply is sensed on VDD1 only. 4 DL1 Gate drive output for the VOUT1 low-side external MOSFET 5 EN1 Enable input for VOUT1. Ground to disable the VOUT1 switcher. Leave open to enable VOUT1 switcher with power-save disabled. Connect to VDD1 to enable VOUT1 in power-save mode. 6 SS1 Soft-start input for VOUT1. For independent start-up, connect a capacitor to RTN. 7 VOUT1 Connect to the output capacitor of VOUT1. Used for DH1 On-Time generation, and for VOUT1 regulation when FB1 is connected to VDD1 or RTN. 8 FB1 Feedback input for VOUT1. Connect to an external resistor divider to adjust VOUT1, or connect to RTN or VDD1 to select internal feedback resistors via the VOUT1 pin. 9 RTN Analog return (ground) for both VOUT1 and VOUT2 10 TON On-time adjust input. Connect a resistor from VIN to TON to program the on-time. The on-time one-shot for VOUT1 is internally set at 20% greater than for VOUT2, to prevent frequency interaction between the two con- verters. 11 FB2 Feedback input for VOUT2. Connect to an external resistor divider to adjust VOUT2, or connect to RTN or VDD2 to select internal feedback resistors via the VOUT2 pin. 12 VOUT2 Connect to the output capacitor of VOUT2. Used for side 2 On-Time generation, and for VOUT2 regulation when FB2 is connected to VDD2 or RTN. 13 SS2 Soft-start input for VOUT1. For independent start-up, connect a capacitor to RTN. 14 EN2 Enable input for VOUT2. Ground to disable the VOUT2 switcher. Leave open to enable VOUT2 switcher with power-save disabled. Connect to VDD2 to enable VOUT2 in power-save mode. 15 DL2 Gate drive output for the VOUT2 low-side external MOSFET 16 VDD2 5V supply input for VOUT2 analog circuits and gate drive outputs. VDD2 must connect to the same supply as VDD1. 17 BST2 Boost capacitor connection for VOUT2 high-side gate drive 18 LX2 Switching (phase) node for VOUT2 19 DH2 Gate drive output for the VOUT2 high-side external MOSFET 20 ILIM2 Current limit input for VOUT2. Connect through a resistor to the drain of the VOUT2 low-side MOSFET. 21 PGD2 Open-drain Power Good output for VOUT2 22 PGD1 Open-drain Power Good output for VOUT1 23 ILIM1 Current limit input for VOUT1. Connect through a resistor to the drain of the VOUT1 low-side MOSFET. 24 DH1 Gate drive output for the VOUT1 high-side external MOSFET T PAD Power ground for VOUT1 and VOUT2 gate drivers, and thermal pad for heatsinking |
Similar Part No. - SC415_08 |
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Similar Description - SC415_08 |
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