Datasheet
Table Of Contents
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Component Circuit Schematic
Table 1. Bill of Materials for Evaluation Board, V
IN
= 3.3V to 5V, V
OUT
= 2.5V
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
, C
O1
4.7 µF, X5R, 6.3V 0805 TDK C2012X5R0J475K 2
C
in3
, C
O2
22 µF, X5R, 16V 1210 TDK C3225X5R1C226M 2
C
in4
47 µF, X5R, 6.3V 1210 TDK C3225X5R0J476M 1
C
O3
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
R
en1
100 kΩ 0805 Vishay Dale CRCW0805100KFKEA 1
C
SS
10 nF, ±5%, C0G, 50V 0805 TDK C2012C0G1H103J 1
Table 2. 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
3
SNVA450B–July 2010–Revised April 2013 AN-2074 LMZ1050xEXT Evaluation Board
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