LT3757/LT3757A
27
3757afd
Table 2. Recommended Component Manufacturers
VENDOR COMPONENTS WEB ADDRESS
AVX Capacitors avx.com
BH Electronics Inductors,
Transformers
bhelectronics.com
Coilcraft Inductors coilcraft.com
Cooper Bussmann Inductors bussmann.com
Diodes, Inc Diodes diodes.com
Fairchild MOSFETs fairchildsemi.com
General
Semiconductor
Diodes generalsemiconductor.com
International Rectifier MOSFETs, Diodes irf.com
IRC Sense Resistors irctt.com
Kemet Capacitors kemet.com
Magnetics Inc Toroid Cores mag-inc.com
Microsemi Diodes microsemi.com
Murata-Erie Inductors,
Capacitors
murata.co.jp
Nichicon Capacitors nichicon.com
On Semiconductor Diodes onsemi.com
Panasonic Capacitors panasonic.com
Sanyo Capacitors sanyo.co.jp
Sumida Inductors sumida.com
Taiyo Yuden Capacitors t-yuden.com
TDK Capacitors,
Inductors
component.tdk.com
Thermalloy Heat Sinks aavidthermalloy.com
Tokin Capacitors nec-tokinamerica.com
Toko Inductors tokoam.com
United Chemi-Con Capacitors chemi-con.com
Vishay/Dale Resistors vishay.com
Vishay/Siliconix MOSFETs vishay.com
Vishay/Sprague Capacitors vishay.com
Würth Elektronik Inductors we-online.com
Zetex Small-Signal
Discretes
zetex.com
applicaTions inForMaTion
Check the stress on the power MOSFET by measuring its
drain-to-source voltage directly across the device terminals
(reference the ground of a single scope probe directly to
the source pad on the PC board). Beware of inductive
ringing, which can exceed the maximum specified voltage
rating of the MOSFET. If this ringing cannot be avoided,
and exceeds the maximum rating of the device, either
choose a higher voltage device or specify an avalanche-
rated power MOSFET.
The small-signal components should be placed away from
high frequency switching nodes. For optimum load regula-
tion and true remote sensing, the top of the output voltage
sensing resistor divider should connect independently to
the top of the output capacitor (Kelvin connection), staying
away from any high dV/dt traces. Place the divider resis-
tors near the LT3757 in order to keep the high impedance
FBX node short.
Figure 11 shows the suggested layout of the 8V to 16V
Input, 24V/2A Output Boost Converter.
Recommended Component Manufacturers
Some of the recommended component manufacturers
are listed in Table 2.