TPS51716 Datasheet, PDF (12/30 Pages) Texas Instruments – Complete DDR2, DDR3, DDR3L, and LPDDR3 Memory Power Solution Synchronous Buck Controller, 2-A LDO, with Buffered Reference

TPS51716
SLUSB94 – OCTOBER 2012
www.ti.com
TYPICAL CHARACTERISTICS (continued)
0.640
100
0.630
90
80
0.620
70
0.610
60
0.600
50
0.590
0.580
0.570
V_VDDQ = 1.2 V
0.560
−2.0 −1.5 −1.0 −0.5 0.0 0.5 1.0 1.5 2.0
VTT Current (A)
40
30
20
10
V_VDDQ = 1.5 V
f_SW = 500 kHz
0
0.001
0.01
0.1
1
VDDQ Output Current (A)
Figure 19. VTT Load Regulation
Figure 20. Efficiency
V_IN = 3 V
V_IN = 5 V
V_IN = 8 V
V_IN = 12 V
V_IN = 20 V
10
G000
100
90
80
70
60
50
40
30
20 L: GLMCR470A/ALPS
10
HS−FET: CSD17308/TI
LS−FET: CSD17309/TI
0
0.001
0.01
0.1
V_VDDQ = 1.2 V
R_MODE = 1 kΩ
f_SW = 500 kHz
V_IN = 5 V
V_IN = 7.4 V
V_IN = 12 V
V_IN = 20 V
1
10
VDDQ Output Current (A)
G000
Figure 21. Efficiency
12
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