RT7247C datasheet(13/15 Pages) RICHTEK

tên linh kiện	RT7247C

Giải thích chi tiết về linh kiện	2A, 18V, 800kHz Synchronous Step-Down Converter

PDF	15 Pages

Scroll/Zoom	100%

nhà sản xuất	RICHTEK [Richtek Technology Corporation]

Trang chủ	http://www.richtek.com

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13 / 15 page

RT7247C

DS7247C-02

September 2012

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

(a) Copper Area = (2.3 x 2.3) mm2,

θJA = 75°C/W

(b) Copper Area = 10mm2,

θJA = 64°C/W

2 ,

θJA = 54°C/W

(d) Copper Area = 50mm2 ,

θJA = 51°C/W

(e) Copper Area = 70mm

2 ,

θJA = 49°C/W

Figure 6. Thermal Resistance vs. Copper Area Layout

Design

Layout Consideration

Follow the PCB layout guidelines for optimal performance

of the RT7247C.

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 RT7247C.

An example of PCB layout guide is shown in Figure 8

for reference.

RT7247C bảng dữ liệu(PDF) 13 Page - Richtek Technology Corporation