3
FN6270.0
May 15, 2006
Absolute Maximum Ratings (T
A
= 25°C)
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,
POS4, NEG4, OUT4, POS5, OUT5 to AGND . .-0.3V to V
SUP
+0.3V
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
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.
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 160 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) 3.0 A
t
SS
B Soft-Start Period C
DEL
= 100nF 7 ms
EL7640A, EL7641A, EL7642A