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Bench Test Setup Conditons

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Table 2. Bill of Materials

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Count RefDes Value Description Size

1 C1 22 µF CAP CERAMIC 22UF 25V X5R 1210 1812

12 C2, C3, C8a, C9, C11, C14a, C17b,

4.7 nF CAP 4700PF 50V CERAMIC X7R 0603 0603

C20, C22, C23, C37a, C40

3 C3a, C8, C23a DNI 0603

3 C12, C19, C39 47 nF CAP 47000PF 25V CERM X7R 0603 0603

1 C5 DNI CAP 100nF 25V CERM X7R 0603 0603

3 C13, C18 10 µF CAP CERAMIC 10UF 25V X5R 1206 1206

2 C38 C14, 47 µF CAP CERAMIC 22UF 25V X5R 1210 1210

1 C17, C37 22 µF CAP CERAMIC 22UF 25V X5R 1210 1210

3 C28, C32, C33 10 µF CAP CER 10UF 10V X7R 0805 0805

1 C29 4.7 µF CAP CER 4.7UF 10V X5R 0603 0603

4 C32a, C33a 100 µF CAPACITOR TANT 100UF 10V 20% SMD CAP_POL_1210

1 J1,'J2,'J3,'J6 ED55/2DS TERMINAL BLOCK 3.5MM 2POS PCB TB_2X3.5MM

2 J4, J5 ED55/3DS TERMINAL BLOCK 3.5MM 2POS PCB TB_3X3.5MM

6 JP3, JP5, JP11, JP20, JP25, JP34 CONN HEADER 50POS .100" SGL GOLD JMP0.3

3 JP26, JP27, JP35 CONN HEADER 50POS .100" SGL GOLD JMP0.2

3 L1, L2, L3 4.7 µH Magnetic-Core Inductor IND_RLF7030

2 R1, R21 120 K RES 120K OHM 1/10W 5% 0603 SMD 0603

1 R2 10 K RES 10K OHM 1/10W 5% 0603 SMD 0603

3 R3, R8, R23 20 K RES 20K OHM 1/10W 5% 0603 SMD 0603

1 R6 383 K RES 383K OHM 1/10W 1% 0603 SMD 0603

4 R10, R26, R27, R35 100 K RES 100K OHM 1/10W 5% 0603 SMD 0603

5 R14, R17, R20, R37, R5a 0 RES 0.0 OHM 1/10W 5% 0603 SMD 0603

3 R14a, R17a, R37a 40.2 K RES 40.2K OHM 1/10W 1% 0603 SMD 0603

1 R14b 80.6 K RES 80.6K OHM 1/10W 1% 0603 SMD 0603

1 R17b 32.4 K RES 32.4K OHM 1/10W 1% 0603 SMD 0603

1 R37b 12.7 K RES 12.7K OHM 1/10W 1% 0603 SMD 0603

1 S5 SEALED MINIATURE KEY SWITCHES, SURFACE

7914J

MOUNT" J " TERMINALS

6 TP1, TP2, TP3, TP5, TP6, TP7 TEST POINT 0.052 Glass Beaded Test Point

1 TP4 TEST POINT 0.052 Glass Beaded Test Point

1 TP14 STD TP-032 Test Point, O.032 Hole

1 TP14a STD TP-032 Test Point, O.032 Hole

1 TP17 STD TP-032 Test Point, O.032 Hole

1 TP17a STD TP-032 Test Point, O.032 Hole

4 TP30, TP31, TP32, TP33 TEST POINT 0.052 Glass Beaded Test Point

1 TP37 STD TP-032 Test Point, O.032 Hole

1 TP37a STD TP-032 Test Point, O.032 Hole

1 U1 QFN-40 TPS65258

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Items with gray backgrounds are optional/not needed for a reference design.

TPS65257 High Current, Synchronous Step Down Three Buck Switcher SLVU568–September 2011

Evaluation Module with 1USB Switch and Push Button Controller

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