參數(shù)資料
型號: LM2597
廠商: National Semiconductor Corporation
英文描述: Octal Buffers/Drivers With 3-State Outputs 20-SO -40 to 85
中文描述: SIMPLE SWITCHER系列電源轉(zhuǎn)換器150千赫0.5A的降壓穩(wěn)壓器的功能,
文件頁數(shù): 32/34頁
文件大?。?/td> 900K
代理商: LM2597
Application Information
(Continued)
TYPICAL SURFACE MOUNT PC BOARD LAYOUT, FIXED OUTPUT (2X size)
DS012440-54
C
IN
C
OUT
D1
L1
C
SS
C
R3
— 10 μF, 35V, Solid Tantalum, AVX, “TPS Series” (surface mount, “D” size)
— 100 μF, 10V Solid Tantalum, AVX, “TPS Series” (surface mount, “D” size)
— 1A, 40V Surface Mount Schottky Rectifier
— Surface Mount Inductor, Coilcraft DO33
— Soft-start Capacitor (surface mount ceramic chip capacitor)
— Delay Capacitor (surface mount ceramic chip capacitor)
— Error Flag Pullup Resistor (surface mount chip resistor)
TYPICAL SURFACE MOUNT PC BOARD LAYOUT, ADJUSTABLE OUTPUT (2X size)
DS012440-55
C
IN
C
OUT
— 68 μF, 20V Solid Tantalum, AVX, “TPS Series” (surface mount, “D” size)
D1
— 1A, 40V Surface Mount Schottky Rectifier
L1
— Surface Mount Inductor, Coilcraft DO33
C
SS
— Soft-start Capacitor (surface mount ceramic chip capacitor)
C
D
— Delay Capacitor (surface mount ceramic chip capacitor)
CFF
— Feedforward Capacitor (surface mount ceramic chip capacitor)
R1
— Output Voltage Program Resistor (surface mount chip resistor)
R2
— Output Voltage Program Resistor (surface mount chip resistor)
R3
— Error Flag Pullup Resistor (surface mount chip resistor)
— 10 μF, 35V, Solid Tantalum, AVX, “TPS Series” (surface mount, “D” size)
FIGURE 35. 2X Printed Circuit Board Layout
L
www.national.com
32
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