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FAN5090MTC Folha de dados(PDF) 2 Page - Fairchild Semiconductor |
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FAN5090MTC Folha de dados(HTML) 2 Page - Fairchild Semiconductor |
2 / 17 page FAN5090 PRODUCT SPECIFICATION 2 REV. 1.0.1 9/16/03 Pin Assignments Pin Definitions Pin Number Pin Name Pin Function Description 1-5 VID0-4 Voltage Identification Code Inputs. Internally pulled-up open collector/TTL compatible inputs program the output voltage over range specified in Table 1. 6 BYPASS 5V Rail. Bypass this pin with a 0.1 µF ceramic capacitor to AGND. 7 AGND Analog Ground. Return path for low power analog circuitry. This pin should be connected to a low impedance system ground plane to minimize ground loops. 8 LDRVB Low Side FET Driver for B. Connect this pin to the gate of an N-channel MOSFET for synchronous operation. The trace from this pin to the MOSFET gate should optimally be <0.5". 9 PGNDB Power Ground B. Return pin for high currents flowing in low-side MOSFET. Connect directly to low-side MOSFET source. 10 SWB High Side Driver Source and Low Side Driver Drain Switching Node B. Gate drive return for high side MOSFET, and negative input for low-side MOSFET current sense. 11 HDRVB High Side FET Driver B. Connect this pin to the gate of an N-channel MOSFET. The trace from this pin to the MOSFET gate should optimally be <0.5". 12 BOOTB Bootstrap B. Input supply for high-side MOSFET. 13 BOOTA Bootstrap A. Input supply for high-side MOSFET. 14 HDRVA High Side FET Driver A. Connect this pin to the gate of an N-channel MOSFET. The trace from this pin to the MOSFET gate should optimally be <0.5". 15 SWA High Side Driver Source and Low Side Driver Drain Switching Node A. Gate drive return for high side MOSFET, and negative input for low-side MOSFET current sense. 16 PGNDA Power Ground A. Return pin for high currents flowing in low-side MOSFET. Connect directly to low-side MOSFET source. 17 LDRVA Low Side FET Driver for A. Connect this pin to the gate of an N-channel MOSFET for synchronous operation. The trace from this pin to the MOSFET gate should optimally be <0.5". 18 VCC VCC. Internal IC supply. Connect to system 12V supply, and decouple with a 10 Ω resistor and 1 µF ceramic capacitor. 19 PWRGD Power Good Flag. An open collector output that will be logic LOW if the output voltage is less than 350mV less than the nominal output voltage setpoint. Power Good is prevented from going low until the output voltage is out of spec for 500µsec. FAN5090 VID0 VID1 VID2 VID3 VID4 AGND BYPASS LDRVB PGNDB SWB HDRVB BOOTB VFB RT ENABLE/SS DROOP ILIM PWRGD VCC LDRVA PGNDA SWA HDRVA BOOTA 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 |
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