isl8501 Intersil Corporation, isl8501 Datasheet - Page 10

• Manufacturer Part Number: isl8501
• Description: Triple Output Controller With 1a Standard Buck Pwm And Dual Ldos
• Manufacturer: Intersil Corporation

Typical Performance Curves
FIGURE 19. STEADY STATE OPERATION AT NO LOAD, 5µs/DIV
LDO1 RIPPLE
20mV/DIV
VOUT1 RIPPLE
20mV/DIV
FIGURE 17. LDO1 vs LOAD, 500kHz, VIN_LDO1 = 3.3V
1.30
1.28
1.26
1.24
1.22
1.20
1.18
1.16
1.14
1.12
1.10
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
0
0
FIGURE 15. V
100
12V
50
200
IN
7V
IN
OUTPUT LOAD (mA)
CC
300
LOAD REGULATION
10
I V
CC
100
400
(mA)
PHASE 10V/DIV
IL 0.2A/DIV
LDO2 RIPPLE
20mV/DIV
500
I
Typical values are at T
Circuit of Figure 2. V
25V
LDO1
150
IN
600
= 450mA, V
700
200
LDO2
ISL8501
IN
A
= 12V, VIN_LDO1 = VIN_LDO2 = V
= 1.8V, I
= +25°C. (Continued)
LDO2
FIGURE 20. STEADY STATE OPERATION AT FULL LOAD,
PHASE 10V/DIV
VOUT1 RIPPLE
20mV/DIV
1.90
1.88
1.86
1.84
1.82
1.80
1.78
1.76
1.74
1.72
1.70
FIGURE 18. LDO2 vs LOAD, 500kHz VIN_LDO2 = 3.3V
= 450mA, T
6
5
4
3
2
1
0
0
0
FIGURE 16. V
100
1µs/DIV
A
5
NO LOAD
= -40°C to +85°C unless otherwise noted.
IL 1A/DIV
50mA LOAD
12V
200
IN
OUT1
CC
10
OUTPUT LOAD (mA)
7V
300
REGULATION WITH V
IN
= 3.3V, I
V
IN
15
400
(V)
OUT1
25V
LDO2 RIPPLE
20mV/DIV
500
20
IN
= 1A, V
LDO1 RIPPLE
20mV/DIV
600
IN
LDO1
25
July 12, 2007
FN6500.1
= 1.2V,
700
30