Datasheet

Layout Guidelines
V
I
1.8Vto3.8V
TPS62510
PGND
L1
2.2 Hm
C2
22 Fm
C3
22pF
R1
300kW
R2
200kW
Cf
100nF
Rf1 W
V
O
1.5Vto1.5 A
C1
22 Fm
SW
FB
PG
AGND
PVIN
7
AVIN
EN
OVT
MODE
10
5
6
8
9
2
1
4
3
TPS62510
SLVS651A – MAY 2006 – REVISED JULY 2009 ................................................................................................................................................................ www.ti.com
Table 3. Inductor Recommendations
Inductor Value Component Supplier Dimensions I
(SAT)
/ R
(DC)
2.2 µ H Sumida CDRH2D18/HP 4R7 3.2 mm x 3.2 mm x 2 mm 1.6 A / 60 m Ω
2.2 µ H Wuerth 744045002 4.5 mm x 3.2 mm x 2.6 mm 1.6 A / 110 m Ω
2.2 µ H Sumida CDRH3D14 4 mm x 4 mm x 1.8 mm 1.75 A / 69 m Ω
2.2 µ H Sumida CDRH4D22 5 mm x 5 mm x 2.4 mm 1.8 A / 25.4 m Ω
2.2 µ H Sumida CDRH4D28 5 mm x 5 mm x 3 mm 2 A / 31.3 m Ω
2.2 µ H Coilcraft MSS5131 5.1 mm x 5.1 mm x 3.1 mm 1.9 A / 23 m Ω
2.2 µ H Coilcraft DO1608 6.6 mm x 4.45 mm x 2.92 mm 2.3 A / 28 m Ω
2.2 µ H Wuerth 74455022 6.6 mm x 4.45 mm x 2.92 mm 2.3 A / 28 m Ω
Figure 22. Layout Guidelines
1. Place and route the power components first (C1, L1, C2).
2. The input capacitor (C1) must be placed as close as possible from PVIN to PGND.
3. The inductor must be placed as close as possible to the switch pin.
4. All ground connections (shown in bold) must be on a common ground plane or form a star ground.
5. Analog ground (AGND) and power ground (PGND) as well as the device PowerPAD™ must be tight
together.
6. The feedback network (R1, C3, R2) must be routed away from the inductor (L1) and should be grounded to
the PowerPAD™.
7. The feedback network must sense and regulate the output voltage across the output capacitor to minimize
load regulation.
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