Datasheet

TPS65251
www.ti.com SLVSAA4D –JUNE 2010–REVISED DECEMBER 2012
TYPICAL CHARACTERISTICS
Buck 1
T
A
= 25°C, V
IN
= 12 V, f
SW
= 1.1 MHz (unless otherwise noted)
Figure 1. Start-Up Figure 2. Ripple
L
O
= 4.7 µH, C
O
= 22 µF, V
OUT
= 3.3 V, 2 A V
OUT
= 3.3 V, 1.5 A, f
SW
= 800 kHz, 20 mV/div
Figure 3. Transient Load Response Figure 4. Transient Supply Response
L
O
= 4.7 µH, C
O
= 22 µF, V
OUT
= 3.3 V, ∆I = 1 A to 1.5 A, 100 L
O
= 4.7 µH, C
O
= 22 µF, V
OUT
= 3.3 V, ∆V
IN
= 8 V to 16.5 V,
mV/div 20 mV/div
Figure 5. Efficiency Figure 6. Efficiency
f
SW
= 500 kHz, V
OUT
= 3.3 V, L= 4.7 µH, DCR = 28 mΩ f
SW
= 500 kHz, V
OUT
= 1.2 V, L = 4.7 µH, DCR = 28 mΩ
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