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
LMZ10503EXT
C
in2
C
in3
1
2
3
4, EP
5
6, 7
LMZ10503EXT
SNVS668G –JUNE 2010–REVISED OCTOBER 2013 www.ti.com
Figure 24.
Table 9. Bill of Materials, V
IN
= 5V, V
OUT
= 2.5V, I
OUT (MAX)
= 3A,
Complies with EN55022 Class B Radiated Emissions
Designator Description Case Size Manufacturer Manufacturer P/N Quantity
U1 SIMPLE SWITCHER® PFM-7 Texas Instruments LMZ10503EXTTZ 1
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, 50V 0603 TDK C1608C0G1H181J 1
C
SS
10 nF, ±5%, C0G, 50V 0805 TDK C2012C0G1H103J 1
Table 10. Output Voltage Setting (R
fbt
= 75 kΩ)
V
OUT
R
fbb
3.3 V 23.7 kΩ
2.5 V 34.8 kΩ
1.8 V 59 kΩ
1.5 V 84.5 kΩ
1.2 V 150 kΩ
0.9 V 590 kΩ
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