Datasheet

50
55
60
65
70
75
80
85
90
95
0 5 10 15 20 25
Load Current (A)
Efficiency (%)
V
IN
= 8 V
V
IN
= 12 V
V
IN
= 14 V
f
SW
= 500 kHz
V
VIN
= 5 V
T
A
= 25°C
G001
1000 10000 100000 400000
−60
−50
−40
−30
−20
−10
0
10
20
30
40
−200
−160
−120
−80
−40
0
40
80
120
160
200
Frequency (kHz)
Gain (dB)
Phase (°)
Gain
Phase
G001
TPS56221
www.ti.com SLUSAH5B –MARCH 2011–REVISED SEPTEMBER 2012
DESIGN EXAMPLE PERFORMANCE CHARACTERISTICS
Output voltage 12 V to 1.0 V, input current 0 A to 25 A.
Figure 21. Efficiency vs Load Current Figure 22. Loop Response 51 kHz Bandwidth, 48° Phase
Margin
Figure 23. TPS56221 Design Example Output Ripple 20 mV/div, 1.0 µs/div, 20 MHz Bandwidth, AC Coupled
Copyright © 2011–2012, Texas Instruments Incorporated 19
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