Datasheet

PVIN
PGND
SW
LM2854
V
IN
V
OUT
C
IN
L
O
C
O
Loop 1
Loop 2
LM2854
SNVS560C –MARCH 2008–REVISED APRIL 2013 www.ti.com
Table 3. Recommended Filter Inductors (continued)
Inductance (µH) DCR (mΩ) Manufacturer Manufacturer P/N Case Size (mm)
2.2 16.1 Sumida CDMC6D28NP-2R2M 6.50 x 7.25 x 3.00
0.56 10 Coilcraft DO1813H-561ML 6.10 x 8.89 x 5.00
0.47 3.3 Coilcraft HA3619-471ALC 7.0 x 7.0 x 3.0
0.68 4.8 Coilcraft HA3619-681ALC 7.0 x 7.0 x 3.0
1.0 7.5 Coilcraft HA3619-102ALC 7.0 x 7.0 x 3.0
1.2 9.4 Coilcraft HA3619-122ALC 7.0 x 7.0 x 3.0
1.5 11.5 Coilcraft HA3619-152ALC 7.0 x 7.0 x 3.0
1.8 16.5 Coilcraft HA3619-182ALC 7.0 x 7.0 x 3.0
0.47 3.3 TDK SPM6530T-R47M170 7.1 x 6.5 x 3.0
0.68 4.9 TDK SPM6530T-R68M140 7.1 x 6.5 x 3.0
1.0 7.1 TDK SPM6530T-1R0M120 7.1 x 6.5 x 3.0
1.5 9.7 TDK SPM6530T-1R5M100 7.1 x 6.5 x 3.0
0.47 14 Cyntec PCMC042T-0R47MN 4.0 x 4.5 x 2.0
1.0 9 Cyntec PCMC063T-1R0MN 6.5 x 6.9 x 3.0
1.5 14 Cyntec PCMC063T-1R5MN 6.5 x 6.9 x 3.0
Table 4. Recommended Filter Capacitors
Capacitance Voltage (V), ESR Chemistry Manufacturer Manufacturer P/N Case Size
(µF) (mΩ)
22 6.3, < 5 Ceramic, X5R TDK C3216X5R0J226M 1206
47 6.3, < 5 Ceramic, X5R TDK C3216X5R0J476M 1206
47 6.3, < 5 Ceramic, X5R TDK C3225X5R0J476M 1210
47 10.0, < 5 Ceramic, X5R TDK C3225X5R1A476M 1210
100 6.3, < 5 Ceramic, X5R TDK C3225X5R0J107M 1210
100 6.3, 50 Tantalum AVX TPSD157M006#0050 D, 7.5 x 4.3 x 2.9 mm
100 6.3, 25 Organic Polymer Sanyo 6TPE100MPB2 B2, 3.5 x 2.8 x 1.9 mm
150 6.3, 18 Organic Polymer Sanyo 6TPE150MIC2 C2, 6.0 x 3.2 x 1.8 mm
330 6.3, 18 Organic Polymer Sanyo 6TPE330MIL D3L, 7.3 x 4.3 x 2.8
mm
470 6.3, 23 Niobium Oxide AVX NOME37M006#0023 E, 7.3 x 4.3 x 4.1 mm
PC Board Layout Guidelines
PC board layout is an important part of DC-DC converter design. Poor board layout can disrupt the performance
of a DC-DC converter and surrounding circuitry by contributing to EMI, ground bounce and resistive voltage drop
in the traces. These can send erroneous signals to the DC-DC converter resulting in poor regulation or instability.
Good layout can be implemented by following a few simple design rules.
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