TPS84621 Datasheet, PDF (9/30 Pages) Texas Instruments – 4.5-V to 14.5-V Input, 6-A Synchronous Buck, Integrated Power Solution

TPS84621
www.ti.com
SLVSAW7A – DECEMBER 2011 – REVISED APRIL 2012
TYPICAL CHARACTERISTICS (PVIN = 12 V, VIN = 5 V) ^{(1) (2)}
100
95
90
85
80
75
70
65
60
55
50
45
40
0
V_OUT = 5.0 V, f_SW = 780 kHz
V_OUT = 3.3 V, f_SW = 630 kHz
V_OUT = 2.5 V, f_SW = 480 kHz
V_OUT = 1.8 V, f_SW = 480 kHz
V_OUT = 1.2V, f_SW = 480 kHz
V_OUT = 0.8V, f_SW = 330 kHz
1
2
3
4
5
6
Output Current (A)
G000
Figure 11. Efficiency vs. Output Current
90
V_OUT = 5.0 V, f_SW = 780 kHz
80
V_OUT = 3.3 V, f_SW = 630 kHz
70
V_OUT = 2.5 V, f_SW = 480 kHz
V_OUT = 1.8 V, f_SW = 480 kHz
60
V_OUT = 1.2 V, f_SW = 480 kHz
V_OUT = 0.8 V, f_SW = 480 kHz
50
40
30
20
10
0
0
1
2
3
4
5
6
Output Current (A)
G000
Figure 12. Voltage Ripple vs. Output Current
3.5
V_OUT = 5.0 V, f_SW = 780 kHz
3
V_OUT = 3.3 V, f_SW = 630 kHz
V_OUT = 2.5 V, f_SW = 480 kHz
2.5
V_OUT = 1.8 V, f_SW = 480 kHz
V_OUT = 1.2 V, f_SW = 480 kHz
2
V_OUT = 0.8 V, f_SW = 480 kHz
1.5
1
0.5
0
0
1
2
3
4
5
6
Output Current (A)
G000
Figure 13. Power Dissipation vs. Output Current
90
80
70
60
50
40
30
V_OUT< 5.0 V
20
0
1
Natural Convection
2
3
4
5
6
Output Current (A)
G000
Figure 14. Safe Operating Area
90
80
70
60
50
40
30
V_OUT = 5.0 V
20
0
1
100 LFM
Natural Convection
2
3
4
5
6
Output Current (A)
G000
Figure 15. Safe Operating Area
40
30
20
10
0
−10
−20
−30
−40
1000
Gain
Phase
10000
Frequency (Hz)
100000
120
90
60
30
0
−30
−60
−90
−120
400000
G000
Figure 16. V_OUT= 2.5 V, I_OUT= 6 A, C_OUT1= 200 µF ceramic,
f_SW= 480 kHz
(1) The electrical characteristic data has been developed from actual products tested at 25°C. This data is considered typical for the
converter. Applies to Figure 11, Figure 12, and Figure 13.
(2) The temperature derating curves represent the conditions at which internal components are at or below the manufacturer's maximum
operating temperatures. Derating limits apply to devices soldered directly to a 100 mm × 100 mm double-sided PCB with 1 oz. copper.
Applies to Figure 14 and Figure 15.
Copyright © 2011–2012, Texas Instruments Incorporated
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