Data Sheet

ISL85410
6
FN8375.5
July 24, 2014
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Absolute Maximum Ratings Thermal Information
VIN to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +42V
PHASE to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to VIN+0.3V (DC)
PHASE to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2V to 43V (20ns)
EN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +42V
BOOT to PHASE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +5.5V
COMP, FS, PG, SYNC, SS, VCC to GND . . . . . . . . . . . . . . . . . . -0.3V to +5.9V
FB to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +2.95V
ESD Rating
Human Body Model (Tested per JESD22-A114) . . . . . . . . . . . . . . . . . 2kV
Charged Device Model (Tested per JESD22-C101E). . . . . . . . . . . . .1.5kV
Latch Up (Tested per JESD-78A; Class 2, Level A) . . . . . . . . . . . . 100mA
Thermal Resistance 
JA
(°C/W) 
JC
(°C/W)
DFN Package (Notes 4
, 5) . . . . . . . . . . . . . . 42 4.5
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . .+150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C
Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . . .-40°C to +125°C
Operating Junction Temperature Range . . . . . . . . . . . . . .-40°C to +125°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
Recommended Operating Conditions
Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +125°C
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 36V
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:
4. 
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
for details.
5. For 
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications T
A
= -40°C to +125°C, V
IN
= 3V to 36V, unless otherwise noted. Typical values are at T
A
= +25°C. Boldface
limits apply across the junction temperature range, -40°C to +125°C
PARAMETER SYMBOL TEST CONDITIONS
MIN
(Note 8
)TYP
MAX
(Note 8)UNITS
SUPPLY VOLTAGE
V
IN
Voltage Range V
IN
336V
V
IN
Quiescent Supply Current I
Q
V
FB
= 0.7V, SYNC = 0V, f
SW
= V
CC
80 µA
V
IN
Shutdown Supply Current I
SD
EN = 0V, V
IN
= 36V (Note 6)24 µA
V
CC
Voltage V
CC
V
IN
= 6V, I
OUT
= 0 to 10mA 4.5 5.1 5.7 V
POWER-ON RESET
V
CC
POR Threshold Rising edge 2.75 2.95 V
Falling edge 2.35 2.6 V
OSCILLATOR
Nominal Switching Frequency f
SW
FS pin = V
CC
430 500 570 kHz
Resistor from FS pin to GND = 340kΩ 240 300 360 kHz
Resistor from FS pin to GND = 32.4kΩ 2000 kHz
Minimum Off-Time t
OFF
V
IN
= 3V 150 ns
Minimum On-Time t
ON
(Note 9)90ns
FS Voltage V
FS
R
FS
= 100k 0.39 0.4 0.41 V
Synchronization Frequency SYNC 300 2000 kHz
SYNC Pulse Width 100 ns
ERROR AMPLIFIER
Error Amplifier Transconductance Gain g
m
External compensation 165 230 295 µA/V
Internal compensation 50 µA/V
FB Leakage Current V
FB
= 0.6V 1 150 nA
Current Sense Amplifier Gain R
T
0.46 0.5 0.54 V/A
FB Voltage T
A
= -40°C to +85°C 0.590 0.599 0.606 V
T
A
= -40°C to +125°C 0.590 0.599 0.607 V