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MAX15000 Datasheet(PDF) 15 Page - Maxim Integrated Products |
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MAX15000 Datasheet(HTML) 15 Page - Maxim Integrated Products |
15 / 18 page Layout Recommendations Typically, there are two sources of noise emission in a switching power supply: high di/dt loops and high dv/dt surfaces. For example, traces that carry the drain cur- rent often form high di/dt loops. Similarly, the heatsink of the MOSFET presents a dv/dt source; therefore, mini- mize the surface area of the heatsink as much as possi- ble. Keep all PC board traces carrying switching currents as short as possible to minimize current loops. Use a ground plane for best results. The pins of the µMAX package are positioned to allow easy interfacing to the external MOSFET. For universal AC input design, follow all applicable safety regulations. Offline power supplies may require UL, VDE, and other similar agency approvals. To avoid noise coupling of signals from RT to NDRV, route traces from RT away from NDRV. Current-Mode PWM Controllers with Programmable Switching Frequency ______________________________________________________________________________________ 15 VCC COMP FB GND CS NDRV UVLO/EN 0V 12V R2 R3 R1 C1 RT UFLG C6 R15 R12 C4 IN MAX15001 C2 C3 R5 R6 15V D1 Q1 L1 Figure 8. 12V to 15V Output Boost Regulator |
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