isl8009a Intersil Corporation, isl8009a Datasheet - Page 6

• Manufacturer Part Number: isl8009a
• Description: 1.5a Low Quiescent Current 1.6mhz High Efficiency Synchronous Buck Regulator
• Manufacturer: Intersil Corporation

Typical Operating Performance
FIGURE 13. OUTPUT VOLTAGE REGULATION vs V
FIGURE 15. STEADY STATE OPERATION AT NO LOAD (PFM),
I
-0.5
L
2.0
1.5
1.0
0.5
0.0
0.2A/DIV
2.0
FIGURE 17. LOAD TRANSIENT (PWM), 200µs/DIV
2.5
MODE
1µs/DIV
I
L
1A/DIV
0.75A LOAD
3.0
NO LOAD
1.5A LOAD
INPUT VOLTAGE (V)
3.5
6
4.0
4.5
LX 2V/DIV
V
50mV/DIV
RSI = SKIP = 0V, L = 2.2µH, C
V
20mV/DIV
(Unless otherwise noted, operating conditions are: T
LX 2V/DIV
OUT
OUT
5.0
IN
RIPPLE
RIPPLE
SKIP
5.5
ISL8009A
FIGURE 14. STEADY STATE OPERATION AT NO LOAD (PWM),
FIGURE 16. STEADY STATE OPERATION WITH FULL LOAD,
LX 2V/DIV
LX 2V/DIV
I
I
1
L
L
0.2A/DIV
= 20µF, C
0.5A/DIV
FIGURE 18. LOAD TRANSIENT (PFM), 200µs/DIV
2
1µs/DIV
1µs/DIV
I
= 20µF, I
L
1A/DIV
A
OUT
= +25°C, V
= 0A) (Continued)
VIN
= 5V, EN = VIN,
LX 2V/DIV
V
V
20mV/DIV
V
50mV/DIV
OUT
OUT
OUT
February 13, 2008
20mV/DIV
RIPPLE
RIPPLE
RIPPLE
FN6656.0