5
FN9197.3
May 26, 2009
Absolute Maximum Ratings Thermal Information
Supply Voltage (VCC_5V Pin) . . . . . . . . . . . . . . . . . . . .-0.3V to +7V
Input Voltage (VIN Pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+27V
BOOT1, 2 and UGATE1, 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . +35V
PHASE1, 2 and ISEN1, 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . +27V
BOOT1, 2 with Respect to PHASE1, 2 . . . . . . . . . . . . . . . . . . +6.5V
UGATE1, 2. . . . . . . . . . . .(PHASE1, 2 - 0.3V) to (BOOT1, 2 + 0.3V)
Thermal Resistance (Typical) θ
JA
(°C/W) θ
JC
(°C/W)
28 Lead QFN (Notes 1, 2) . . . . . . . . 34 5
Maximum Junction Temperature (Plastic Package) -55°C to +150°C
Maximum Storage Temperature Range. . . . . . . . . .-65°C to +150°C
Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
Pb-Free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTES:
1. θ
JA
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
2. For θ
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to “Block Diagram” on page 3 and “Typical
Application Schematic” on page 4. V
IN
= 5.6V to 24V, or VCC_5V = 5V ±10%, T
A
= -40°C to +85°C, Typical
values are at T
A
= +25°C. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise
specified. Temperature limits established by characterization and are not production tested.
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
VIN SUPPLY
Input Voltage Range 5.6 12 24 V
VCC_5V SUPPLY (Note 3)
Input Voltage VIN = VCC_5V 4.5 5.0 5.6 V
Output Voltage V
IN
> 5.6V, I
L
= 20mA 4.5 5.0 5.5 V
Maximum Output Current V
IN
= 12V 60 - - mA
SUPPLY CURRENT
Shutdown Current (Note 4) SD1
= SD2 = GND - 50 375 µA
Operating Current (Note 5) - 2.0 4.0 mA
REFERENCE SECTION
Nominal Reference Voltage - 0.8 - V
Reference Voltage Tolerance -1.0 - 1.0 %
POWER-ON RESET
Rising VCC_5V Threshold 4.25 4.45 4.5 V
Falling VCC_5V Threshold 3.95 4.2 4.4 V
OSCILLATOR
Total Frequency Variation 1.25 1.4 1.55 MHz
Peak-to-Peak Sawtooth Amplitude (Note 6) V
IN
= 12V - 1.5 - V
V
IN
= 5V - 0.625 - V
Ramp Offset (Note 7) -1.0- V
SYNC Input Rise/Fall Time (Note 7) - - 10.0 ns
SYNC Frequency Range 5.1 5.6 6.2 MHz
SYNC Input HIGH Level 3.5 - - V
SYNC Input LOW Level --1.5V
SYNC Input Minimum Pulse Width (Note 7) 10 - - ns
SYNC Output HIGH Level VCC - 0.6V - - V
ISL6441
