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SS6341CSTR Datenblatt(PDF) 10 Page - Silicon Standard Corp.

Teilenummer SS6341CSTR
Bauteilbeschribung  High Performance, Triple-Output, Auto-Tracking Combo Controller
PDF  14 Pages
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Hersteller  SSC [Silicon Standard Corp.]
Direct Link  http://www.siliconstandard.com
Logo SSC - Silicon Standard Corp.

SS6341CSTR Datenblatt(HTML) 10 Page - Silicon Standard Corp.

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SS6341
A multi-layer printed circuit board is recommended.
Figure 10 shows
the
connections
of
the
critical
components in the converter. The CIN and COUT could
each represent numerous physical capacitors. Dedicate
one solid layer for a ground plane and make all critical
component ground connections with vias to this layer.
PWM Output Capacitors
The load transient for the microprocessor core requires
high quality capacitors to supply the high slew rate (di/dt)
current demand.
The ESR (equivalent series resistance) and ESL
(equivalent series inductance) parameters determine the
buck capacitor values, rather than actual capacitance.
For a given transient load magnitude, the output voltage
transient change due to the output capacitor can be found
from the following equation:
∆
∆
∆
∆
V
ESR
I
ESL
I
T
OUT
OUT
OUT
=
×
+
×
where
∆IOUT is the transient load current step.
+
+
+
VOUT
COUT
Q1
+3.3VIN
+5VIN
LOUT
GATE3
CIN
Q2
Css
SS
GATE2
PGND
LGATE
PHASE
UGATE
OCSET
VIN2
GND
VCC
+12V
+
+
Q3
VOUT3
COUT3
Power Plane Layer
Circuit Plane Layer
Via Connection to Ground Plane
+
Q4
VOUT2
COUT2
Fig. 10 Printed circuit board power planes and islands
Rev.2.01 6/26/2003



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