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L6738ATR Datasheet(PDF) 9 Page - STMicroelectronics |
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L6738ATR Datasheet(HTML) 9 Page - STMicroelectronics |
9 / 32 page L6738A Pin description and connection diagrams Doc ID 18134 Rev 2 9/32 2 Pin description and connection diagrams Figure 4. Pin connection (top view) 2.1 Pin descriptions 1 2 3 VSEN FBG VCCDR 12 6 10 11 L6738A LGATE PHASE CSN 7 5 16 15 14 BOOT 4 8 FB 9 13 Table 2. Pin description Pin# Name Function 1 VCCDR Low side driver section power supply. Operative voltage is 5 V to 12 V bus. Filter with 1 µF MLCC to GND. 2LGATE Low-side driver output. Connect directly to the low-side MOSFET gate. A small series resistor can be useful to reduce dissipated power especially in high frequency applications. 3 PHASE High-side driver return path. Connect to the high-side MOSFET source. This pin is also monitored for the adaptive dead-time management. 4BOOT High-side driver supply. This pin supplies the high-side floating driver. Connect through the CBOOT capacitor to the PHASE pin. The pin is internally connected through a boot diode to the VCCDR pin. A 2.2Ohm series resistor is also provided. See Section 8 for guidance in designing the capacitor value. 5UGATE High-side driver output. Connect to high-side MOSFET gate. A small series resistor may help in reducing the PHASE pin negative spike as well as cooling the device. 6 PGOOD Power Good. It is an open-drain output set free after SS (with 3x clock cycle delay) as long as the out- put voltage monitored through VSEN is within specifications. Pull-up to 3.3 V (typ) or lower, if not used it can be left floating. 7EN Enable Pin. Pull-high to <5 V to enable conversion, 10 µA pull-down provided. |
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