Datasheet

VIN
EN
GND
FB
V
IN
V
OUT
SS
C
in1
C
O1
R
fbt
R
comp
C
comp
R
fbb
C
SS
U1
VOUT
LMZ1050xEXT
C
in2
C
in3
1
2
3
4, EP
5
6, 7
Circuit Example: Complies with EN55022 Class B Radiated Emissions www.ti.com
9 Circuit Example: Complies with EN55022 Class B Radiated Emissions
Figure 19. Component Schematic, V
IN
= 5V, V
OUT
= 2.5V, Complies with EN55022 Class B Radiated
Emissions
Table 3. Bill of Materials
Designator Description Case Size Manufacturer Manufacturer P/N Quantit
y
U1 SIMPLE SWITCHER® PFM-7 Texas Instruments LMZ10503/LMZ10504/LMZ10 1
505EXTTZ
C
in1
1 µF, X7R, 16V 0805 TDK C2012X7R1C105K 1
C
in2
4.7 µF, X5R, 6.3V 0805 TDK C2012X5R0J475K 1
C
in3
47 µF, X5R, 6.3V 1210 TDK C3225X5R0J476M 1
C
O1
100 µF, X5R, 6.3V 1812 TDK C4532X5R0J107M 1
R
fbt
75 kΩ 0805 Vishay Dale CRCW080575K0FKEA 1
R
fbb
34.8 kΩ 0805 Vishay Dale CRCW080534K8FKEA 1
R
comp
1.1 kΩ 0805 Vishay Dale CRCW08051K10FKEA 1
C
comp
180 pF, ±5%, C0G, 0603 TDK C1608C0G1H181J 1
50V
C
SS
10 nF, ±5%, C0G, 50V 0805 TDK C2012C0G1H103J 1
Figure 20. Radiated Emissions (EN55022, Class B) Figure 21. Radiated Emissions (EN55022, Class B)
V
IN
= 5V, V
OUT
= 2.5V, I
OUT
= 3A V
IN
= 5V, V
OUT
= 2.5V, I
OUT
= 4A
Tested on LMZ10503EXT Evaluation Board Tested on LMZ10504EXT Evaluation Board
10
AN-2074 LMZ1050xEXT Evaluation Board SNVA450B–July 2010–Revised April 2013
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