RT7237 データシートの表示（PDF） - Richtek Technology
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RT7237 Datasheet PDF : 15 Pages
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(a) Copper Area = (2.3 x 2.3) mm2, θJA = 75°C/W
(b) Copper Area = 10mm2, θJA = 64°C/W
RT7237C
Layout Consideration
Follow the PCB layout guidelines for optimal performance
of the RT7237C.
Keep the traces of the main current paths as short and
wide as possible.
Put the input capacitor as close as possible to the device
pins (VIN and GND).
SW node is with high frequency voltage swing and
should be kept at small area. Keep analog components
away from the SW node to prevent stray capacitive noise
pick-up.
Connect feedback network behind the output capacitors.
Keep the loop area small. Place the feedback
components near the RT7237C.
An example of PCB layout guide is shown in Figure 8
for reference.
(c) Copper Area = 30mm2 , θJA = 54°C/W
(d) Copper Area = 50mm2 , θJA = 51°C/W
(e) Copper Area = 70mm2 , θJA = 49°C/W
Figure 6. Thermal Resistance vs. Copper Area Layout
Design
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS7237C-05 February 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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