Datasheet

FB
LM5085
PGATE
ISEN
RT
VIN
GND
VCC
ADJ
SW
Q1
V
OUT
5V
Pads for
wire loop
L1 15 PH
C10
3300 pF
C9
0.01 PF
R5
10 m:
R6
0:
R3 1.91k
C7
47 PF
R1
10k
5.5V to 55V
Input
V
IN
GND
C1
6.8 PF
C2
4.7 PF
C8
0.1 PF
R4
90.9k
ENABLE
TP1
0.47 PF
C3
C4 1000 pF
JP1
A
B
C
D1
A
B
C
R7
23.2k
V
OUT
GND
C6
47 PF
R2
3.4k
JP2
Scope Probe Adapters www.ti.com
Figure 7. Complete Evaluation Board Schematic
Table 1. Bill of Materials (BOM)
Item Description Mfg Part Number Package Value
C1 Ceramic Capacitor United Chemicon 2220 6.8 µF, 100 V
KTS101B685M55N0T00
C2 Ceramic Capacitor United Chemicon 1812 4.7 µF, 100 V
KTS101B475M43N0T00
C3 Ceramic Capacitor TDK C2012X7R1C474K 0805 0.47 µF, 16 V
C4 Ceramic Capacitor TDK C2012X7R2A102K 0805 1000 pF, 100 V
C5 Ceramic Capacitor Unpopulated 0805
C6, C7 Ceramic Capacitor TDK C3225X5R0J476M 1210 47 µF, 6.3 V
C8 Ceramic Capacitor TDK C2012X7R2A104K 0805 0.1 µF, 100 V
C9 Ceramic Capacitor TDK C2012X7R2A103K 0805 0.01 µF, 100 V
C10 Ceramic Capacitor TKD C2012X7R2A332K 0805 3300 pF, 100 V
D1 Schottky Diode On Semi MBRB2060CT D2PAK 60 V, 20A
L1 Power Inductor Wurth XXL 7447709150 12 mm x 12 mm x 10 mm 15 µH
Q1 P-Channel MOSFET Vishay Si7465DP SO-8 Power 60 V, 5A
R1 Resistor Vishay CRCW08051002F 0805 10k
R2 Resistor Vishay CRCW08053401F 0805 3.4k
R3 Resistor Vishay CRCW08051911F 0805 1.91k
R4 Resistor Vishay CRCW08059092F 0805 90.9k
R5 Resistor Vishay WSL2010R0100F 2010 0.01 Ω
R6 Resistor Vishay CRCW08050000Z 0805 0 Ω
R7 Resistor Vishay CRCW08052322F 0805 23.2k
U1 Switching Regulator Texas Instruments LM5085 VSSOP8
8
AN-1878 LM5085 Evaluation Board SNVA357B–October 2008–Revised April 2013
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