Datasheet

TPS65251
www.ti.com SLVSAA4D –JUNE 2010–REVISED DECEMBER 2012
TYPICAL CHARACTERISTICS
Buck 2
T
A
= 25°C, V
IN
= 12 V, f
SW
= 1.14 MHz (unless otherwise noted)
Figure 8. Start-Up Figure 9. Ripple
L
O
= 4.7 µH, C
O
= 22 µF, V
OUT
= 2.5 V, 1.5 A V
OUT
= 2.5 V, 1.5 A, f
SW
= 800 kHz, 5 mV/div
Figure 10. Transient Load Response Figure 11. Transient Supply Response
L
O
= 4.7 µH, C
O
= 22 µF, V
OUT
= 2.5 V, ∆I = 1 A to 1.5 A L
O
= 4.7 µH, C
O
= 22 µF, V
OUT
= 2.5 V, ∆V
IN
= 9 V to 8 V
Figure 12. Efficiency Figure 13. Efficiency
f
SW
= 500 kHz, V
OUT
= 3.3 V, L = 4.7 µH, DCR = 28 mΩ (Also f
SW
= 500 kHz, V
OUT
= 1.8 V, L = 4.7 µH, DCR = 28 mΩ (Also
Applies to Buck 3) Applies to Buck 3)
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