Datasheet
VIN
EN
GND
FB
V
IN
V
OUT
SS
C
in1
C
O1
R
fbt
Rcomp
C
comp
R
fbb
C
SS
U1
VOUT
LMZ10503EXT
1
2
3
4, EP
5
6, 7
LMZ10503EXT
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SNVS668G –JUNE 2010–REVISED OCTOBER 2013
Figure 21.
Table 3. Bill of Materials, V
IN
= 3.3V to 5V, V
OUT
= 2.5V, I
OUT (MAX)
= 3A,
Optimized for Electrolytic Input and Output Capacitance
Designator Description Case Size Manufacturer Manufacturer P/N Quantity
U1 SIMPLE SWITCHER ® PFM-7 Texas Instruments LMZ10503EXTTZ 1
C
in1
150 µF, 6.3V, 18 mΩ C2, 6.0 x 3.2 x 1.8 mm Sanyo 6TPE150MIC2 1
C
O1
330 µF, 6.3V, 18 mΩ D3L, 7.3 x 4.3 x 2.8 Sanyo 6TPE330MIL 1
mm
R
fbt
100 kΩ 0603 Vishay Dale CRCW0603100KFKEA 1
R
fbb
47.5 kΩ 0603 Vishay Dale CRCW060347K5FKEA 1
R
comp
15 kΩ 0603 Vishay Dale CRCW060315K0FKEA 1
C
comp
330 pF, ±5%, C0G, 50V 0603 TDK C1608C0G1H331J 1
C
SS
10 nF, ±10%, X7R, 16V 0603 Murata GRM188R71C103KA01 1
Table 4. Bill of Materials, V
IN
= 3.3V, V
OUT
= 0.8V, I
OUT (MAX)
= 3A, Optimized for Solution Size and
Transient Response
(1)
Designator Description Case Size Manufacturer Manufacturer P/N Quantity
U1 SIMPLE SWITCHER ® PFM-7 Texas Instruments LMZ10503EXTTZ 1
C
in1
, C
O1
47 µF, X5R, 6.3V 1206 TDK C3216X5R0J476M 2
R
fbt
110 kΩ 0402 Vishay Dale CRCW0402100KFKED 1
R
comp
1.0 kΩ 0402 Vishay Dale CRCW04021K00FKED 1
C
comp
27 pF, ±5%, C0G, 50V 0402 Murata GRM1555C1H270JZ01 1
C
SS
10 nF, ±10%, X7R, 16V 0402 Murata GRM155R71C103KA01 1
(1) In the case where the output voltage is 0.8V, it is recommended to remove R
fbb
and keep R
fbt
, R
comp
, and C
comp
for a type III
compensation.
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