FAN5070 Datasheet, PDF (5/14 Pages) Fairchild Semiconductor – High Performance Programmable Synchronous DC-DC Controller

FAN5070
Typical Operating Characteristics
(V_CCA = 5V, V_CCP = 12V, and T_A = +25°C using circuit in Figure 1, unless otherwise noted.)
Vcpu Efficiency vs.Output Current
90
85
80
75
70
65
2
4
6
8
10
12
14
16
18
20
22
24
26
28
Output Current (A)
1.48
Droop,Circuit of Fig.1
1.46
1.44
1.42
1.4
1.38
1.36
1.34
0
3
6
9
12
15
18
21
24
28
Output Current (A)
Output Ripple, 1.425 @ 28A
Transient Response, 28A to 0.1A
1.515V
1.425V
1.335V
Time (2 s/division)
Transient Response, 0.1A to 28A
1.515V
1.425V
1.335V
Time (20 s/division)
Switching Waveforms, 28A Load
HIDRV
pin
LODRV
pin
Time (20 s/division)
Time (20 s/division)
5
REV. 1.0.1 8/7/01