ISL6545 INTERSIL [Intersil Corporation], ISL6545 Datasheet - Page 3

• Manufacturer Part Number: ISL6545
• Description: 5V or 12V Single Synchronous Buck Pulse-Width Modulation PWM Controller
• Manufacturer: INTERSIL [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 TO 12V
VCC
V
D
IN
BOOT
20kΩ
+V
C
O
BULK
PHASE
BOOT
UGATE
LGATE/OCSET
April 29, 2010
FN6305.5