LM26420, LM26420-Q0, LM26420-Q1
SNVS579J –FEBRUARY 2009–REVISED SEPTEMBER 2015
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8.2.4.2 Detailed Design Procedure
Table 6. Bill Of Materials
PART ID
PART VALUE
MANUFACTURER
PART NUMBER
U1
2 A Buck Regulator
22 µF, 6.3 V, 1206, X5R
47 µF, 6.3 V, 1206, X5R
0.47 µF, 10 V, 0805, X7R
5.0 µH, 2.82 A
TI
LM26420Y
C3216X5R0J226M
C3216X5R0J476M
VJ0805Y474KXQCW1BC
MSS7341-502NL
C3, C4
TDK
C1, C2, C6, C7, C8
TDK
C5
L1
Vishay
Coilcraft
Coilcraft
Vishay
Vishay
Vishay
Vishay
L2
3.3 µH, 3.28 A
MSS7341-332NL
R3, R4
R5, R6
R1
10.0 kΩ, 0603, 1%
49.9 kΩ, 0603, 1%
12.7 kΩ, 0603, 1%
4.99 Ω, 0603, 1%
CRCW060310K0F
CRCW060649K9F
CRCW060312K7F
CRCW06034R99F
R7, R2
Also see Detailed Design Procedure above.
8.2.4.3 Application Curves
See Application Curves above.
8.2.5 LM26420Y 550-kHz, 1.8-V Typical High-Efficiency Application Circuit
Vin
4.5V to
5.5V
C
R
7
C
5
C
4
3
R
5
R
6
VIN
1
VIN
c
VIN
2
PG
PG
EN
SW
FB
1
2
2
2
2
LM26420
EN
1
VOUT2
1.8V/2A
VOUT1
3.3V/2A
L
L
2
1
SW
1
R
1
R
2
FB
1
C
C
2
1
PGND , PGND ,
1
2
AGND, DAP
R
3
R
4
Figure 52. LM26420Y (550 kHz): VIN = 5 V, VOUT1 = 3.3 V at 2 A and VOUT2 = 1.8 V at 2 A
8.2.5.1 Design Requirements
See Design Requirements above.
28
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