3
FN6436.0
June 18, 2007
Absolute Maximum Ratings (T
A
= +25°C) Thermal Information
IN, CTL to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V
COMP, FB, FBP, FBN, DEL, REF to AGND. . . . . -0.3V to V
IN
+0.3V
PGND, BGND to AGND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.3V
LX to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +24V
SUP to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +18V
DRVP, SRC to AGND . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to +36V
POS1, NEG1, OUT1, POS2, NEG2, OUT2, POS3, OUT3,
DRVN to AGND . . . . . . . . . . . . . . . . . . . . . . . V
IN
-20V to V
IN
+0.3V
COM, DRN to AGND . . . . . . . . . . . . . . . . . . . . -0.3V to V
SRC
+0.3V
LX Maximum Continuous RMS Output Current . . . . . . . . . . . . . 1.6A
OUT1, OUT2, OUT3, OUT4, OUT5
Maximum Continuous Output Current . . . . . . . . . . . . . . . . . . ±75mA
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Maximum Continuous Junction Temperature . . . . . . . . . . . . +125°C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
Operating Ambient Temperature . . . . . . . . . . . . . . . . -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.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
Electrical Specifications V
IN
= 3V, V
BOOST
= V
SUP
= 12V, V
SRC
= 20V, Over-temperature from -40°C to +85°C.
Unless Otherwise Specified.
PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT
SUPPLY
V
IN
Input Supply Range 2.6 5.5 V
V
LOR
Undervoltage Lockout Threshold V
IN
rising 2.4 2.5 2.6 V
V
LOF
Undervoltage Lockout Threshold V
IN
falling 2.2 2.3 2.4 V
I
S
Quiescent Current LX not switching 2.5 mA
I
SS
Quiescent Current - Switching LX switching 5 10 mA
T
FD
Fault Delay Time C
DEL
= 100nF 23 ms
V
REF
Reference Voltage T
A
= +25°C 1.19 1.215 1.235 V
1.187 1.215 1.238 V
SHUTDN Thermal Shutdown Temperature 140 °C
MAIN BOOST REGULATOR
V
BOOST
Output Voltage Range (Note 1) V
IN
+15% 18 V
f
OSC
Oscillator Frequency 1050 1200 1350 kHz
D
CM
Maximum Duty Cycle 82 85 %
V
FBB
Boost Feedback Voltage T
A
= +25°C 1.192 1.205 1.218 V
1.188 1.205 1.222 V
V
FTB
FB Fault Trip Level Falling edge 0.85 0.925 1.020 V
V
BOOST
/I
BOOST
Load Regulation 50mA < I
LOAD
< 250mA 0.1 %
V
BOOST
/V
IN
Line Regulation V
IN
= 2.6V to 5.5V 0.08 %/V
I
FB
Input Bias Current V
FB
= 1.35V 500 nA
gmV FB Transconductance dI = ±2.5µA at COMP, FB = COMP 160 µA/V
r
ON
LX LX ON-resistance 150 200 250 m
I
LEAK
LX LX Leakage Current V
FB
= 1.35V, V
LX
= 13V 0.02 40 µA
I
LIM
LX LX Current Limit Duty cycle = 65% (Note 1) 2.4 2.8 3.3 A
t
SS
B Soft-Start Period C
DEL
= 100nF 7 ms
ISL97642
