6
FN9151.5
February 13, 2008
Absolute Maximum Ratings (Note 1) Thermal Information
Bias Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+18V
BOOT and Ugate Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +24V
Thermal Resistance (Typical) θ
JA
(°C/W) θ
JC
(°C/W)
QFN Package (Notes 2, 3). . . . . . . . . . 47 8.5
QSOP Package (Note 2) . . . . . . . . . . . 90 NA
Maximum Junction Temperature (Plastic Package) . . . . . . . +150°C
Maximum Storage Temperature Range. . . . . . . . . .-65°C to +150°C
Ambient Temperature Range. . . . . . . . -40°C to +85°C (for “I” suffix)
Junction Temperature Range. . . . . . . . . . . . . . . . . .-40°C to +125°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. All voltages are with respect to GND.
2. 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.
3. For θ
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications Operating Conditions, Unless Otherwise Noted: VIN = 12V, PV
CC
shorted with V
CC5
, T
A
= +25°C
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS
VIN SUPPLY
Input Voltage Range 5.6 12 16 V
VIN SUPPLY CURRENT
Shutdown Current (Note 4) ENSS = GND - 1.4 - mA
Operating Current (Notes 4, 5) -2.03.0mA
VCC5 SUPPLY (Notes 5, 6)
Input Voltage Range VIN = VCC5 for 5V configuration 4.5 5.0 5.5 V
Output Voltage VIN = 5.6V to 16V, I
L
= 3mA to 50mA 4.5 5.0 5.5 V
Maximum Output Current VIN = 12V 50 - - mA
POWER-ON RESET
Rising V
CC5
Threshold VIN connected to VCC5, 5V input
operation
4.32 4.4 4.45 V
Falling V
CC5
Threshold 4.09 4.1 4.25 V
UVLO Threshold Hysteresis 0.16 - - V
PWM CONVERTERS
Maximum Duty Cycle F
SW
= 300kHz 90 96 - %
Minimum Duty Cycle F
SW
= 300kHz - - 0 %
FB pin bias current -80-nA
Undervoltage Protection V
UV1
Fraction of the set point; ~3μs noise filter 75 - 85 %
Overvoltage Protection V
OVP1
Fraction of the set point; ~1μs noise filter 112 - 120 %
OSCILLATOR
Free Running Frequency RT = VCC5, T
A
= -40°C to +85°C 270 300 330 kHz
Total Variation T
A
= -40°C to +85°C, with freq. set by
external resistor at RT
-10 - +10 %
Frequency Range (Set by RT) VIN = 12V 100 - 1400 kHz
Ramp Amplitude (Note 7) ΔV
OSC
-1.25-V
P-P
ISL6420
