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MIC24420 Datasheet(PDF) 24 Page - Micrel Semiconductor

Part No. MIC24420
Description  2.5A Dual Output PWM Synchronous Buck Regulator IC
Download  34 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC24420 Datasheet(HTML) 24 Page - Micrel Semiconductor

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Micrel, Inc.
June 2012
(SW) must be keep as short as possible.
RC Snubber
Place the RC snubber on the same side of the board
and as close as possible to the low-side MOSFET.
Low-side MOSFET
Low-side drive MOSFET traces (LSD pin to
MOSFET gate pin) must be short and routed over a
ground plane. The ground plane should be the
connection between the MOSFET source and
Chose a low-side MOSFET with a high CGS/CGD
ratio and a low internal gate resistance to minimize
the effect of dv/dt inducted turn-on.
Do not put a resistor between the LSD output and
the gate.
Use a 4.5V Vgs rated MOSFET. Its higher gate
threshold voltage is more immune to glitches than a
2.5V or 3.3V rated MOSFET. MOSFETs that are
rated for operation at less than 4.5VGS should not be
High-side MOSFET
Add a 20 to 60 ohm resistor in series with the boost
pin. This will slow down the turn-on time of the high-
side MOSFET while leaving the turn-off time

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