isl88550a Intersil Corporation, isl88550a Datasheet - Page 8

• Manufacturer Part Number: isl88550a
• Description: Synchronous Step Down Controller With Sourcing And Sinking Ldo Regulator
• Manufacturer: Intersil Corporation

Typical Operating Characteristics
FIGURE 3. SWITCHING FREQUENCY vs INPUT VOLTAGE
1.815
1.810
1.805
1.800
1.795
1.790
1.785
1.780
1.775
FIGURE 7. OUTPUT RIPPLE vs LOAD (1.8V) (t
700
675
650
625
600
575
550
525
500
475
450
425
400
60
50
40
30
20
10
0
0.001
0.001
FIGURE 5. VDDQ REGULATION vs LOAD (1.8V)
4
6
(t
25V
3V
12V
3V
ON
IN
8
IN
IN
IN
25V
= GND)
- SKIP
25V
25V
12V
3V
3V
0.010
0.010
- PWM
- PWM
- PWM
IN
IN
IN
10
IN
IN
IN
- SKIP
- PWM
- SKIP
- SKIP
- SKIP
- PWM
12
12V
I
OUT
LOAD (A)
LOAD (A)
12V
8
14
V
0.100
0.100
IN
IN
I
IN
OUT
= 0A
- SKIP
(V)
16
- PWM
= 12A
18
1.000
1.000
20
ON
unless otherwise noted. (Continued)
22
V
IN
= GND)
= 12V, V
24
10.00
10.00
26
ISL88550A
DDQ
= 1.8V, t
ON
FIGURE 4. SWITCHING FREQUENCY vs TEMPERATURE
1.800
1.795
1.790
1.785
1.780
1.775
0.95
0.94
0.93
0.92
0.91
0.90
0.89
0.88
0.87
0.86
0.85
590
570
550
530
510
490
470
450
FIGURE 6. VDDQ OUTPUT vs INPUT VOLTAGE (1.8V)
= GND, SKIP# = AV
-3.5
-40 -30 -20 -10 0
4
FIGURE 8. VTT REGULATION vs VTT LOAD
6
(t
-2.5
ON
8
= GND)
10
-1.5
DD
TEMPERATURE (°C)
10 20 30 40 50
I
12
OUT
, circuit of Figure 29, T
-0.5
LOAD (A)
= 0A
14
V
IN
I
(V)
OUT
16
0.5
I
OUT
= 12A
18
= 0A
I
OUT
1.5
60
20
= 12A
A
70 80 90 100
= +25°C,
22
October 1, 2007
2.5
24
FN6168.2
3.5
26