isl8009a Intersil Corporation, isl8009a Datasheet - Page 8

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

Typical Applications
Block Diagram
POR
VFB
RSI
EN
SHUTDOWN
BANDGAP
SOFT- START
20µF
INPUT 2.7V TO 5.5V
0.736V
0.864V
C
8
0.8V
0.2V
1
100k
+
R 1
+
DELAY
+
EAMP
2ms
+
SCP
FIGURE 24. TYPICAL APPLICATION DIAGRAM
FIGURE 25. FUNCTIONAL BLOCK DIAGRAM
SLOPE
COMP
COMP
SLOP
+
E
27pF
390k
COMP
+
POR
VIN
EN
SKIP
OSCILLATOR
ISL8009A
ISL8009A
SKIP
OCP
GND
VFB
RSI
+
+
LX
CONTROLLER
PROTECTION
PWM/PFM
DRIVER
LOGIC
0.17V
SKIP
ZERO - CROSS
SHUTDOWN
0.85V
2.2µH
SENSING
L
20µF
CSA1
C
2
+ +
100k
R 3
1.8V TO 1.5A
OUTPUT
124k
R
2
GND
VIN
LX
February 13, 2008
FN6656.0