A6985F datasheet(56/77 Pages) STMICROELECTRONICS

Part #	A6985F

Description	38 V 500 mA synchronous step-down switching regulator

PDF	77 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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56 / 77 page

Application board

A6985F

56/77

DocID027738 Rev 2

Application board

The reference evaluation board schematic is shown in Figure 41.

Figure 41. Evaluation board schematic

The additional input filter (C16, L3, C15, L2, C14) limits the conducted emission on the

power supply (refer to Figure 56 on page 67).

Table 16. Common bill of material

Reference

Part number

Description

Manufacturer

C1, C10, C11

Not mounted

C2012X7S2A105K

F - 0805 - 50 V - X7S - 10%

TDK

470 nF - 10 V - 0603

C4, C7, C8

See Table 17, Table 18 on page 60,

Table 19 on page 62

100 nF - 10 V - 0603

10 nF - 10 V - 0603

CGA5L3X5R1H106K

F - 1206 - 50 V - X5R - 10%

TDK

C14, C15, C16

CGA5L3X5R1H475k

4.7

F - 1206 - 50 V - X7R - 10%

TDK

C13

UWD1H101MCQ1GS

100

F - 50 V - 20%

Nichicon

 - 0603

1 M

 - 1%- 0603

56 k

 - 1% - 0603

R7, R8, R9

See Table 17, Table 18, Table 19

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