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178021501 Datasheet(PDF) 2 Page - Wurth Elektronik GmbH & Co. KG, Germany. |
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178021501 Datasheet(HTML) 2 Page - Wurth Elektronik GmbH & Co. KG, Germany. |
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2 / 46 page  we-online.com © May 2016 Würth Elektronik eiSos GmbH & Co. KG - Data Sheet - REV 1.0 2/46 WPMDU1251501 / 171021501 MagI³C Power Module VDRM - Variable Step Down Regulator Module PACKAGE PGND 40 VOUT 39 SW 41 SW 38 AGND 37 18 PGND 17 PGND 16 PGND 15 VOUT 14 VOUT 13 VOUT 12 VOUT FB 6 PG 35 AGND 34 AGND 33 AGND 32 RT/CLK 31 INTRRT 30 Top view PGND 40 VOUT 39 SW 41 SW 38 AGND 37 Bottom view 36 FB 35 PG 34 AGND 33 AGND 32 AGND 31 RT/CLK 30 INTRRT PGND 18 PGND 17 PGND 16 VOUT 15 VOUT 14 VOUT 13 VOUT 12 PIN DESCRIPTION SYMBOL PIN TYPE PIN DESCRIPTION VIN 26 Power The supply input pin is a terminal for an unregulated input voltage source. It is required to place the input capacitor nearby the VIN pin and PGND. VOUT 10, 11, 12, 13, 14, 15, 39 Power The output voltage pins are connected to the internal inductor. Connect external bypass capacitors between these pins and PGND. PGND 16, 17, 18, 19, 20, 40 Power This is the return current path for the power stage of the device. Connect these pins to the load and to the bypass capacitors associated with VIN and VOUT. Pad 40 should be connected to PCB ground planes using multiple vias for good thermal performance. AGND 4, 5, 32, 33, 34, 37 Supply These pins are connected to the internal analog ground (AGND) of the device. This node should be treated as the zero volt ground reference for the analog control circuitry. Pad 37 should be connected to PCB ground planes using multiple vias for good thermal performance. Not all pins are connected together internally. All pins must be connected together externally with a copper plane. Connect AGND to PGND at a single point (at the ground terminal of the first output capacitor). See Layout section for recommendations. RSET INT 1 Analog An internal resistor of 10KΩ is connected internally between RSET INT and FB. This is the low side resistor of the feedback voltage divider. Must be connected to AGND. FB 36 Input Connect a resistor from the last output capacitor terminal to FB to set the output voltage. |
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