Technical Reference Notes
ALD12/18/20/25 Series
(Single Output 16
th
Brick)
MODEL: ALD12/ 18/20/ 25 SERIES SHEET 12 OF 20
AUGUST 17, 2005 – REVISION C
Performance Curves
2.5V Version (continued)
1.8V Version
Efficiency vs. Output Current, T
A
=25°C
55%
60%
65%
70%
75%
80%
85%
90%
95%
0 5 10 15 20 25
Output C urrent (A mps)
Efficienc
Vin = 36Vdc
Vin = 48Vdc
Vin = 75Vdc
Figure 24. 1.8V Efficiency vs. output current at various
input line conditions, T
A
= 25°C.
P ower Dissipation vs. Output Current, T
A
=25°C
0
2
4
6
8
10
0 5 10 15 20 25
Output C urrent (A mps)
Power Dissipation (Watts
Vin = 36 Vdc
Vin = 48 Vdc
Vin = 75 Vdc
Figure 25. 1.8V Power Dissipation vs. load current at
various input line conditi ons, T
A
= 25°C.
Figure 23. 2.5V Transient Response 50% to 75% step at
V
IN
= 48Vdc, T
A
= 25°C, di/dt = 0.1A/µs, C
O
= 0.
Figure 22. 2.5V Output current vs. ambient temperature
curves at V
IN
= 48Vdc.
ALD2 0G4 8 Current v s. Tempera ture
0
5
10
15
20
25 40 55 70 85
Ambient Temperature (° C)
Output Current (A)
0 LFM
100 LFM
200 LFM
300 LFM
400 LFM