MAX5941BCSE-T Maxim Integrated, MAX5941BCSE-T Datasheet - Page 20

• Manufacturer Part Number: MAX5941BCSE-T
• Description: Power Switch ICs - POE / LAN
• Manufacturer: Maxim Integrated

IEEE 802.3af-Compliant Power-Over-Ethernet
Interface/PWM Controller for Power Devices
Table 3. Component Suppliers
20
Power FETS
Current-Sense Resistors
Diodes
Capacitors
Magnetics
where:
V
V
capacitive ripple. Calculate the ESR ripple and
capacitive ripple as follows:
RIPPLE
RIPPLE,ESR
______________________________________________________________________________________
V
V
RIPPLE,ESR
RIPPLE,C
is the combined RMS output ripple due to
COMPONENT
, the ESR ripple, and V
= I
= I
RIPPLE
RIPPLE
/(2 x π x 275kHz x C
x ESR
RIPPLE,C
International Rectifier
Fairchild
Vishay-Siliconix
Dale-Vishay
IRC
ON Semi
General Semiconductor
Central Semiconductor
Sanyo
Taiyo Yuden
AVX
Coiltronics
Coilcraft
Pulse Engineering
OUT
, the
)
SUPPLIERS
All connections carrying pulsed currents must be very
short, be as wide as possible, and have a ground plane
as a return path. The inductance of these connections
must be kept to a minimum due to the high di/dt of the
currents in high-frequency switching power converters.
Current loops must be analyzed in any layout pro-
posed, and the internal area kept to a minimum to
reduce radiated EMI. Ground planes must be kept as
intact as possible.
Layout Recommendations
www.irf.com
www.fairchildsemi.com
www.vishay.com/brands/siliconix/main.html
www.vishay.com/brands/dale/main.html
www.irctt.com/pages/index.cfm
www.onsemi.com
www.gensemi.com
www.centralsemi.com
www.sanyo.com
www.t-yuden.com
www.avxcorp.com
www.cooperet.com
www.coilcraft.com
www.pulseeng.com
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