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MAX15109 Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX15109 Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 19 page High-Efficiency, 8A, Current-Mode Synchronous Step-Down Switching Regulator with VID Control 8 ______________________________________________________________________________________ Pin Description Pin Configuration BUMP NAME FUNCTION A1, B1, C1, D1 PGND Power Ground. Low-side switch source terminal. Connect PGND and the return terminals of input and output capacitors to the power ground plane. A2, A3, B2, C2 LX Inductor Connection. Connect LX to the switching side of the inductor. LX is high impedance when the device is in shutdown mode. A4 PGOOD Open-Drain Power-Good Output. PGOOD goes low when VFB is below the PGOOD threshold. A5 VID0 VID0 Logic Input. Use VID0 and VID1 to select output voltage. B3, C3, D3 IN Input Power Supply. Input supply range is 2.7V to 5.5V. Bypass IN with a minimum 10FF ceramic capacitor to PGND. See the Typical Application Circuit. B4 I.C. Internally Connected. Leave unconnected. B5 FB Feedback Input. Connect FB to the sense the output voltage. C4 VID1 VID1 Logic Input. Use VID0 and VID1 to select output voltage. C5 SS Soft-Start and VID Transition Timing Control. Connect a capacitor from SS to PGND to set the startup time and the output voltage transition timing. See the Output Voltage Transition Timing section for details. D2 INX Internally Unconnected. INX is not internally connected to IN. However, do externally connect INX to IN to increase the area of the power plane for optimal heat dissipation. D4 EN Enable Input. EN is a digital input that turns the regulator on and off. Drive EN high to turn on the regulator. Connect to IN for always-on operation. D5 COMP Error Amplifier Output. Connect compensation network from COMP to signal ground (SGND). See the Compensation Design Guidelines section. WLP BOTTOM VIEW 5 4 3 2 1 B C D A MAX15109 VID0 PGOOD LX LX PGND FB I.C. IN LX PGND SS VID1 IN LX PGND COMP EN IN INX PGND |
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