LM2597 datasheet(32/34 Pages) NSC

32 / 34 page

Application Information (Continued)

TYPICAL SURFACE MOUNT PC BOARD LAYOUT, FIXED OUTPUT (2X size)

DS012440-54

CIN

— 10 µF, 35V, Solid Tantalum, AVX, “TPS Series” (surface mount, “D” size)

COUT

— 100 µF, 10V Solid Tantalum, AVX, “TPS Series” (surface mount, “D” size)

— 1A, 40V Surface Mount Schottky Rectifier

— Surface Mount Inductor, Coilcraft DO33

CSS

— 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

CIN

— 10 µF, 35V, Solid Tantalum, AVX, “TPS Series” (surface mount, “D” size)

COUT — 68 µF, 20V Solid Tantalum, AVX, “TPS Series” (surface mount, “D” size)

— 1A, 40V Surface Mount Schottky Rectifier

— Surface Mount Inductor, Coilcraft DO33

CSS

— Soft-start Capacitor (surface mount ceramic chip capacitor)

— Delay Capacitor (surface mount ceramic chip capacitor)

CFF

— Feedforward Capacitor (surface mount ceramic chip capacitor)

— Output Voltage Program Resistor (surface mount chip resistor)

— Error Flag Pullup Resistor (surface mount chip resistor)

FIGURE 35. 2X Printed Circuit Board Layout

LM2597 Datasheet(PDF) 32 Page - National Semiconductor (TI)