ISL6420 Datasheet, PDF (6/19 Pages) Intersil Corporation – Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

ISL6420
Absolute Maximum Ratings (Note 1)
Bias Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+18V
BOOT and Ugate Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +24V
ESD Classification
Human Body Model (Per MIL-STD-883 Method 3015.7) . . 1500V
Charged Device Model (Per EOS/ESD DS5.3, 4/14/93) . . 2000V
Thermal Information
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
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. 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
PARAMETER
VIN SUPPLY
Input Voltage Range
VIN SUPPLY CURRENT
Shutdown Current (Note 4)
Operating Current (Notes 4, 5)
VCC5 SUPPLY (Notes 5, 6)
Input Voltage Range
Output Voltage
Maximum Output Current
POWER-ON RESET
Rising V_CC5 Threshold
Falling V_CC5 Threshold
UVLO Threshold Hysteresis
PWM CONVERTERS
Output Voltage (Note 7)
Maximum Duty Cycle
Minimum Duty Cycle
FB pin bias current
Undervoltage Protection
Overvoltage Protection
OSCILLATOR
Free Running Frequency
Total Variation
Frequency Range (Set by RT)
Ramp Amplitude
Operating Conditions, Unless Otherwise Noted: VIN = 12V, PV_CC shorted with V_CC5, T_A = 25°C
SYMBOL
TEST CONDITIONS
MIN
TYP MAX
UNITS
5.6
12
16
V
ENSS = GND
-
1.4
-
mA
-
2.0
3.0
mA
VIN = VCC5 for 5V configuration
4.5
5.0
5.5
V
VIN = 5.6V to 16V, I_L = 3mA to 50mA
4.5
5.0
5.5
V
VIN = 12V
50
-
-
mA
VIN connected to VCC5, 5V input
operation
4.32
4.4
4.45
V
4.09
4.1
4.25
V
0.16
-
-
V
0.6
F = 300kHz
90
F = 300kHz
-
-
V_UV1 Fraction of the set point; ~3µs noise filter 75
V_OVP1 Fraction of the set point; ~1µs noise filter 112
-
V_IN - 0.5
V
96
-
%
-
0
%
80
-
nA
-
85
%
-
120
%
∆V_OSC
RT = VCC5, T_A = -40°C to 85°C
T_A = -40°C to 85°C, with freq. set by
external resistor at RT
VIN = 12V
By design
270
300
330
kHz
-10
-
+10
%
100
-
1400
kHz
-
1.25
-
V_P-P
6
FN9151.4
July 18, 2005