sc1210str Semtech Corporation, sc1210str Datasheet - Page 8

• Manufacturer Part Number: sc1210str
• Description: Sc1210 High-speed 12 V Synchronous Power Mosfet Driver
• Manufacturer: Semtech Corporation

Filters for Supply Power
Filters for Supply Power
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the Phase Node during the top FET turn-off due to para-
sitic inductance in the switching loop. The spike could
be minimized with a careful PCB layout. In those applica-
tions with TO-220 package FETs, it is recommended to
use a clamping diode on the DRN pin to mitigate the
impact of the excessive phase node negative spike.
Filters for Supply Power
Filters for Supply Power
Filters for Supply Power
For VREG pin of the SC1210, it is recommended to use
a 1uF to 4.7uF, 25V rating ceramic capacitor for
decoupling.
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LAY Y Y Y Y OUT GUIDELINES
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The switching regulator is a high di/dt power circuit. Its
Printed Circuit Board (PCB) layout is critical. A good lay-
out can achieve an optimum circuit performance while
minimized the component stress, resulting in better sys-
tem reliability. For a multi-phase voltage regulator, the
SC1210 driver, FETs, inductor, and supply decoupling ca-
pacitors in each phase have to be considered to yield a
proper PCB layout.
For the SC1210 driver, the following guidelines are typi-
cally recommended during PCB layout:
1. Place the SC1210 close to the FETs for shortest gate
drive traces and ground return paths.
2. Connect bypass capacitors as close as possible to
decoupling pins (VREG and VIN) and PGND. The trace
length of the decoupling capacitor on VREG pin should
be no more than 0.2” (5mm).
3. Locate the components of the bootstrap circuit close
to the SC1210.
4. Provide a proper decoupling for the FETs to reduce
the inductive kick seen by the DRN pin.
POWER MANAGEMENT
Applications Information (Cont.)
2003 Semtech Corp.
OUT GUIDELINES
OUT GUIDELINES
OUT GUIDELINES
OUT GUIDELINES
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SC1210