TPS51200
www.ti.com
SLUS812–FEBRUARY 2008
Design Example 5
This design example describes a 3.3-VIN, DDR3 Tracking Configuration
R1
10 kW
TPS51200
1
2
REFIN
VIN 10
3.3 VIN
V
= V
V
= 1.5 V
= 1.5 V
VDDQ
R2
10 kW
C4
1000 pF
R3 C6
100 kW 4.7 mF
VLDOIN PGOOD
9
PGOOD
V
VLDOIN
VDDQ
C7
10 mF
C8
10 mF
3
4
5
VO
GND
EN
8
7
6
= 0.75 V
VTT
C1
C2
C3
10 mF 10 mF 10 mF
PGND
VOSNS REFOUT
VTTREF
C5
0.1 mF
UDG-08032
Figure 29. 3.3-VIN, DDR3 Tracking Configuration
Design Example 5 List of Materials
REFERENCE
DESIGNATOR
DESCRIPTION
SPECIFICATION
PART NUMBER
MANUFACTURER
R1, R2
R3
10 kΩ
Resistor
100 kΩ
C1, C2, C3
C4
10 µF, 6.3 V
1000 pF
GRM21BR70J106KE76L
Murata
C5
Capacitor
0.1 µF
C6
4.7 µF, 6.3 V
10 µF, 6.3 V
GRM21BR60J475KA11L
GRM21BR70J106KE76L
Murata
Murata
C7, C8
26
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