SG78xxA/78xx
PRODUCT DATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
WWW
.Microse
m
i
.CO
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Copyright
1997
Rev. 1.5, 2010-07-13
TM
Positive Fixed Voltage Regulator
ABSOLUTE MAXIMUM RATINGS
Device Output Voltage
Input Voltage
(Transient)(Note 3)
Input Voltage Differential
(Output Shorted to Ground)
5V
35V
50V
35V
12V
35V
50V
35V
15V
35V
50V
35V
Operating Junction Temperature .........................................................................................................................................................150°C
Storage Temperature Range ................................................................................................................................................. -65
°C to 150°C
Lead Temperature (Soldering 10 seconds) ..........................................................................................................................................300
°C
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of
specified terminal
.
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-
output differential increases beyond 30V. Note also from figure 1, that maximum load current is reduced at high voltages. The 50V input rating of the
SG78xxA series refers to ability to withstand 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.
THERMAL DATA
K
TO-3 3-Terminal Metal Can (Two pins and case)
THERMAL RESISTANCE
-JUNCTION TO CASE,
θ
JC
3.0
°C/W
THERMAL RESISTANCE
-JUNCTION TO AMBIENT,
θ
JA
35
°C/W
T
TO-39 3-Pin Metal Can
THERMAL RESISTANCE
-JUNCTION TO CASE,
θ
JC
15
°C/W
THERMAL RESISTANCE
-JUNCTION TO AMBIENT,
θ
JA
120
°C/W
G
TO-257 3-Pin Hermetic
THERMAL RESISTANCE
-JUNCTION TO CASE,
θ
JC
3.5
°C/W
THERMAL RESISTANCE
-JUNCTION TO AMBIENT,
θ
JA
42
°C/W
IG
TO-257 3-Pin Hermetic (Isolated)
THERMAL RESISTANCE
-JUNCTION TO CASE,
θ
JC
4.0
°C/W
THERMAL RESISTANCE
-JUNCTION TO AMBIENT,
θ
JA
42
°C/W
L
Leadless Chip Carrier 20-Pin Ceramic
THERMAL RESISTANCE
-JUNCTION TO CASE,
θ
JC
35
°C/W
THERMAL RESISTANCE
-JUNCTION TO AMBIENT,
θ
JA
120
°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The
θ
JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow.
PP
AA
CC
KK
AA
GG
EE
DD
AA
TT
AA