CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1.
JA
is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
2. All voltages are to be measured with respect to GND, unless otherwise specified.
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
schematic. 9V < V
D
< 16V, R
TD
= 51.1k, C
T
= 470pF, T
A
= -40°C to 105°C (Note 4), Typical values are at
T
A
= 25°C
TEST CONDITIONS
MIN
TYP
MAX
UNITS
PARAMETER
SUPPLY VOLTAGE
Start-Up Current, I
DD
Operating Current, I
DD
V
DD
< START Threshold
R
LOAD
, C
OUTA,B
= 0
C
OUTA,B
= 1nF
-
-
-
5.9
5.3
-
-
2.89
5
6.3
5.7
0.6
175
-
8.5
6.6
6.3
-
A
mA
mA
V
V
V
UVLO START Threshold
UVLO STOP Threshold
Hysteresis
CURRENT SENSE
Current Limit Threshold
CS to OUT Delay
CS Sink Current
Input Bias Current
PULSE WIDTH MODULATOR
Minimum Duty Cycle
Maximum Duty Cycle
V
ERROR
< C
T
Offset
C
T
= 470pF, R
TD
= 51.1k
C
T
= 470pF, R
TD
= 1.1k(Note 4)
C
T
to SS Comparator Input Gain
SS to SS Comparator Input Gain
(Note 4)
(Note 4)
(Note 4)
0.55
-
8
-1
0.6
35
10
-
0.65
-
-
1
V
ns
mA
A
-
-
-
-
-
-
94
99
1
0.8
0
-
-
-
-
%
%
%
V/V
V/V
FN9147 Rev.8.00
September 22, 2005
Page 4 of 18
ISL6744
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
schematic. 9V < V
D
< 16V, R
TD
= 51.1k, C
T
= 470pF, T
A
= -40°C to 105°C (Note 4), Typical values are at
T
A
= 25°C
(Continued)
TEST CONDITIONS
MIN
TYP
MAX
UNITS
PARAMETER
OSCILLATOR
Charge Current
R
TD
Voltage
Discharge Current Gain
C
T
Valley Voltage
C
T
Peak Voltage
SOFT-START
Charging Current
SS Clamp Voltage
Overcurrent Shutdown Threshold Voltage
Overcurrent Discharge Current
Reset Threshold Voltage
OUTPUT
High Level Output Voltage (VOH)
Low Level Output Voltage (VOL)
Rise Time
Fall Time
THERMAL PROTECTION
Thermal Shutdown
Thermal Shutdown Clear
Hysteresis, Internal Protection
NOTES:
(Note 4)
(Note 4)
(Note 4)
(Note 4)
(Note 4)
143
1.925
45
0.75
2.70
156
2
-
0.8
2.80
170
2.075
65
0.85
2.90
A
V
A/A
V
V
45
3.8
-
12
0.25
-
4.0
3.9
15
0.27
68
4.2
-
23
0.30
µA
V
V
A
V
V
DD
- V
OUTA
or V
OUTB
,
I
OUT
= -100mA
I
OUT
= 100mA
C
GATE
= 1nF, V
DD
= 12V
C
GATE
= 1nF, V
DD
= 12V
-
-
-
-
0.5
0.5
17
20
2.0
1.0
60
60
V
V
ns
ns
-
-
-
145
130
15
-
-
-
°C
°C
°C
3. Specifications at -40°C are guaranteed by design, not production tested.
4. Guaranteed by design, not 100% tested in production.
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