Datasheet

47 PF
4 5 6 7 3 2 1
EP
VOUT
FB RO N SS
VIN
EN GND
V
IN
C
IN
2
10 PF
Enable
15V to 42V
C
FF
0.022 PF
U1
C
SS
4700 pF
R
FBB
2.43 k:
12V
OUT
at 3A
C
O
1
1 PF
C
O
3
R
ON
249 k:
R
ENT
124 k:
R
ENB
11.8 k:
R
FBT
34 k:
C
IN
1
1 PF
UVLO at 13.5V
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Figure 1. Evaluation Board Schematic
Table 1. LMZ1420xH Bill of Materials, V
IN
= 15V to 42V, V
OUT
= 12V, I
OUT (MAX)
= 3A / 2A / 1A
Designator Description Case Size Manufacturer Manufacturer P/N Quantit
y
U1 SIMPLE SWITCHER® PFM-7 Texas Instruments LMZ14203 or 1
LMZ14202 or
LMZ14201
C
IN4
, C
O1
1 µF, X7R, 50V 1206 Taiyo Yuden UMK316B7105KL-T 2
C
IN2
10 µF, X5R, 50V 1210 Taiyo Yuden UMK325BJ106MM-T 1
C
O3
47 µF, 35 mΩ, 16V, 7343-43 KEMET T525D476M016ATE035 1
Polymer
C
FF
0.022 µF, X7R, 100V 0805 AVX 08051C223JAT2A 1
C
SS
4700 pF, X7R, 25V 0805 AVX 08053A472JAT2A 1
R
ENB
11.8 kΩ 0805 Panasonic ERJ-6ENF1182V 1
R
ENT
124 kΩ 0805 Panasonic ERJ-6ENF1243V 1
R
FBT
34 kΩ 0805 Vishay-Dale CRCW080534K0FKEA 1
R
FBB
2.43 kΩ 0805 Panasonic ERJ-6ENF2431V 1
R
ON
249 kΩ 0805 Vishay-Dale CRCW0805249KFKEA 1
2
AN-2089 LMZ14203H/02H/01H Evaluation Board SNVA459A–January 2011–Revised April 2013
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