SG7800A/SG7800 SERIES
05/01 Rev 1.4
LINFINITY Microelectronics Inc.
Copyright
© 1997
11861 Western Avenue
∞
∞
∞
∞
∞ Garden Grove, CA 92841
2
(714) 898-8121
∞
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∞ FAX: (714) 893-2570
ABSOLUTE MAXIMUM RATINGS (Note 1)
Device
Input Voltage
Input Voltage Differential
Output Voltage
Input Voltage
(transient) (Note 3)
(Output shorted to ground)
5V
35V
50V
35V
12V
35V
50V
35V
15V
35V
50V
35V
POSITIVE REGULATOR
Operating Junction Temperature
Hermetic (K, T, IG & L - Packages) .........................
150°C
Storage Temperature Range ..........................
Lead Temperature (Soldering, 10 Seconds) .................
-65°C to 150°C
300°C
Note 1. Values beyond which damage may occur.
THERMAL DATA
K Package:
Thermal Resistance-Junction to Case,
θ
JC .................
3.0°C/W
Thermal Resistance-Junction to Ambient,
θ
JA ............... 35°C/W
T Package:
Thermal Resistance-Junction to Case,
θ
JC ..................
15°C/W
Thermal Resistance-Junction to Ambient,
θ
JA ............
120°C/W
IG Package:
Thermal Resistance-Junction to Case,
θ
JC .................
3.5°C/W
Thermal Resistance-Junction to Ambient,
θ
JA ..............
42°C/W
L Package:
Thermal Resistance-Junction to Case,
θ
JC ..................
35°C/W
Thermal Resistance-Junction to Ambient,
θ
JA ............
120°C/W
Note A. Junction Temperature Calculation: T
J = TA + (PD x θJA).
Note B. The above numbers for
θ
JC are maximums for the limiting thermal
resistance of the package in a standard mounting configuration.
The
θ
JA numbers are meant to be guidelines for the thermal
performance of the device/pc-board system. All of the above
assume no ambient airflow.
Note 3. Operation at high input voltages is dependent upon load current. When
load current is less than 5mA, output will rise out of regulation as input-
oiutput differential icreases beyond 30V. Note also from Figure 1, that
maximum load current is reduced at high voltages. The 50V input rating
of the SG140A series refers to ability to withstnd high line or transient
conditions without damage. Since the regulator's maximum current
capability is reduced, the output may fall out of regulation at high input
voltages under nominal loading.
FIGURE 1.
PEAK OUTPUT CURRENT
VS. INPUT - OUTPUT DIFFERENTIAL
RECOMMENDED OPERATING CONDITIONS (Note 2)
Note 2. Range over which the device is functional.
CHARACTERISTIC CURVES
Operating Junction Temperature Range:
SG7800A/SG7800 ........................................ -55
°C to 150°C
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