
4/90 Rev 1.1 2/94
Copyright
1994
L
IN
F
IN
ITY
Microelectronics Inc.
11861 Western Avenue
∞
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
2
SG1540/SG2540/SG3540
Overvoltage Crowbar Energy (CV2)................................. 8mJ
Operating Junction Temperature
Hermetic (Y Package) ................................................ 150°C
Plastic (M, DW Packages) .......................................... 150°C
Storage Temperature Range ............................ -65°C to 150°C
Lead Temperature (Soldering, 10 Seconds) .................. 300°C
Supply Voltage (+V
)........................................................ +37V
DC Output Current, Continuous (V
)........................... 100mA
AC Output Current, Continuous ..................................... 200mA
Analog Inputs (Start and Overvoltage) .................-0.3V to 6.0V
Analog Input Currents (V>8V).......................................... 10mA
Overvoltage Crowbar Current, Continuous ..................... 50mA
Note 1. Values beyond which damage may occur.
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Y Package:
Thermal Resistance-
Junction to Case
,
θ
JC
.................. 50°C/W
Thermal Resistance-
Junction to Ambient
,
θ
JA
............ 130°C/W
M Package:
Thermal Resistance-
Junction to Case
,
θ
JC
.................. 60°C/W
Thermal Resistance-
Junction to Ambient
,
θ
JA
............. 95°C/W
DW Package:
Thermal Resistance-
Junction to Case
,
θ
JC
.................. 40°C/W
Thermal Resistance-
Junction to Ambient
,
θ
JA
............. 95°C/W
THERMAL DATA
Note A. Junction Temperature Calculation: T
= T
+ (P
x
θ
).
Note B. The above numbers for
θ
are maximums for the limiting
thermal resistance of the package in a standard mount-
ing configuration. The
θ
numbers are meant to be
guidelines for the thermal performance of the device/pc-
board system. All of the above assume no ambient
airflow.
Timing Capacitor Range ........................................ 1nF to 20μF
Operating Ambient Temperature Range
SG1540 ...........................................................-55°C to 125°C
SG2540 .............................................................-25°C to 85°C
SG3540 ................................................................0°C to 70°C
Supply Voltage Range ............................................... 7V to 35V
DC Output Current, Continuous................................ 0 to 50mA
AC Output Current, Continuous ............................. 0 to 100 mA
Oscillator Frequency Range ........................... 1KHz to 400KHz
Timing Resistor Range ...................................... 2K
to 150K
Note 2. Range over which the device is functiona
l.
RECOMMENDED OPERATING CONDITIONS
(Note 2)
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG1540 with -55
°
C
≤
T
≤
125
°
C, SG2540 with
-25
°
C
≤
T
≤
85
°
C, SG3540 with 0
°
C
≤
T
≤
70
°
C, and +V
= 15V. A 0.1μF high frequency bypass capacitor is recommended on V
IN
. Low duty cycle
testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
Units
Typ. Max.
V
START
= 0 to 2.37V
V
TIMING
= +V
IN
;
V
OUT
Open
F
OSC
OUT
and AC
OUT
Open
V
PIN 1
= 0 to 5V
I
PIN 1
= 1mA
I
PIN 4
= 100μA
2.37
6
0.2
0.3
3
2.50
0.1
7
0.1
0.4
0.6
6
2.63
1
8
0.2
mA
mA
mA
V
μA
V
V
Start-up Section
Start Current I
Operating Current
Start Threshold
Start Bias Current
Start Clamp Voltage
Hysteresis ON Voltage
DC Output Section
V
OUT
Voltage
Min.
SG1540/2540/3540
Test Conditions
Parameter
Short Circuit Current
12.5
12.0
50
13.5
13.0
100
225
V
V
mA
I
SOURCE
= 10mA
I
SOURCE
= 50mA
V
OUT