ISL6844IU Intersil, ISL6844IU Datasheet - Page 7

• Manufacturer Part Number: ISL6844IU
• Description: IC CTRLR PWM SGL-ENDED 8-MSOP
• Manufacturer: Intersil

Specifications of ISL6844IU

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 2MHz
• Duty Cycle: 50%
• Voltage - Supply: 15 V ~ 18 V
• Buck: Yes
• Boost: Yes
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Frequency-max: 2MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Electrical Specifications
NOTES:
Gain, A
CS to OUT Delay
ERROR AMPLIFIER
Open Loop Voltage Gain
Unity Gain Bandwidth
Reference Voltage
FB Input Bias Current
COMP Sink Current
COMP Source Current
COMP VOH
COMP VOL
PSRR
OSCILLATOR
Frequency Accuracy
Frequency Variation with V
Temperature Stability
Amplitude, Peak-to-Peak
RTCT Discharge Voltage
Discharge Current
OUTPUT
Gate VOH
Gate VOL
Peak Output Current
Rise Time
Fall Time
PWM
Maximum Duty Cycle
Minimum Duty Cycle
4. This is the V
5. Limits established by characterization and are not production tested.
6. Adjust V
CS
= ΔV
DD
PARAMETER
above the start threshold and then lower to 15V.
COMP
DD
current consumed when the device is active but not switching. Does not include gate drive current.
/ΔV
CS
DD
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
7
Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram” and “Typical
Application” schematic on pages 3 and 4. V
values are at T
specified. Temperature limits established by characterization and are not production tested. (Continued)
(Note 5)
0 < V
(Note 5)
(Note 5)
(Note 5)
V
V
V
V
V
V
Frequency = 120Hz, V
18V (Note 5)
Initial, T
T = +25°C (f
(Note 5)
RTCT = 2.0V
V
OUT to GND, I
C
C
C
ISL6840, ISL6842, ISL6843
ISL6841, ISL6844, ISL6845
ISL6840, ISL6842, ISL6843
ISL6841, ISL6844, ISL6845
A
FB
FB
COMP
COMP
FB
FB
DD
OUT
OUT
OUT
= +25°C. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise
= V
= 0V
= 2.3V
= 2.7V
to OUT, I
CS
= 1nF (Note 5)
= 1nF (Note 5)
= 1nF (Note 5)
J
COMP
= 1.5V, V
= 1.5V, V
TEST CONDITIONS
< 910mV, V
= +25°C
18V
OUT
OUT
- f
FB
FB
12V
= -200mA
= 200mA
FB
= 2.7V
= 2.3V
)/f
DD
= 0V
12V
= 12V to
DD
= 15V (Note 6), R
2.475
4.80
MIN
-1.0
-0.4
2.5
3.5
1.0
0.4
7.2
60
60
49
94
47
-
-
-
-
-
-
-
-
-
-
-
-
t
= 10kΩ, C
2.514
TYP
-0.2
3.0
0.2
1.9
0.7
8.4
1.0
1.0
1.0
25
90
80
52
20
20
96
48
5
-
-
-
-
-
-
-
t
= 3.3nF, T
A
VREF
MAX
2.55
3.5
1.0
1.0
1.0
9.5
2.0
2.0
= -40 to +105°C Typical
40
55
40
40
5
0
0
-
-
-
-
-
-
-
-
-
-
August 7, 2008
UNITS
MHz
kHz
V/V
mA
mA
mA
dB
µA
dB
FN9124.10
ns
ns
ns
%
%
%
%
%
%
V
V
V
V
V
V
V
A