FAN5038 Datasheet, PDF (6/15 Pages) Fairchild Semiconductor – Dual Voltage Controller for DSP Power

FAN5038
PRODUCT SPECIFICATION
Typical Operating Characteristics
(VCCA = 5V, VCCL = 12V and TA = +25°C using circuit in Figure 1, unless otherwise noted)
Switcher Efficiency vs. Output Current
85%
80%
75%
70%
65%
60%
55%
50%
0
1
2
3
4
Output Current (A)
+0.50
Output Voltage vs. Temperature,
I_SW = 5A or I_LR = 5A
+0.25
Nom.
-0.25
-0.50
0
25
50
75
100 125
Temperature (°C)
Switcher Output Voltage vs. Load
1.805
1.800
1.795
1.790
1.785
1.780
1.775
1.770
1.765
0
1
2
3
4
Output Current (A)
Switcher Transient Response, 0 to 4A
Time (20µs/division)
Switcher Output Ripple, IOUT = 4A
System Power-Up
3.3V
1.8V
Time (10µs division)
Time (5ms/division)
6
REV. 1.0.2 7/6/00