ISL6545A Intersil Corporation, ISL6545A Datasheet - Page 3

• Manufacturer Part Number: ISL6545A
• Description: Single Synchronous Buck Pulas Width MoDulation
• Manufacturer: Intersil Corporation

Block Diagram
Typical Application
COMP/SD
FB
LGATE/OCSET
R
OFFSET
5V int.
TO
C
R
21.5μA
20μA
3
F
F
SAMPLE
HOLD
AND
C
Type II
compensation
shown
DCPL
C
5V or 12V
COMP/SD
V
I
CC
0.4V
0.6V
ERROR
+
-
AMP
FB
7
DIS
6
+
-
ISL6545
ISL6545, ISL6545A
COMPARATOR
FIXED 300 (or 600)kHz
3
5
+
-
VCC
R
GND
S
OC
OSCILLATOR
COMPARATOR
1
8
2
4
PWM
UGATE
LGATE/OCSET
PHASE
BOOT
SOFT-START
+
-
POR AND
R
OCSET
C
BOOT
5V int.
INHIBIT
REGULATOR
PWM
INTERNAL
DIS
L
OUT
GND
C
CONTROL
OUT
LOGIC
GATE
C
VCC
HF
1V-12V
VCC
D
V
BOOT
IN
+V
20kΩ
C
O
BULK
PHASE
BOOT
UGATE
LGATE/OCSET
November 15, 2006
FN6305.3