鈥?/div>
Very Small Footprint
High Efficiency > 85%
Self-Contained Inductor
Internal Short-Circuit Protection
Over-T
emperature Protection
Fast Transient Response
Wide Input Range
The PT78ST100 is a series of wide-
input range, 3-terminal regulators.
These ISRs have a maximum output current
of 1.5 Amps and an output voltage that is laser
trimmed to a variety of industry standard volt-
ages.
These 78 series regulators have excel-
lent line and load regulation with internal
short- circuit and over-temperature protec-
tion, and are offered in a variety of standard
output voltages. These ISRs are very flex-
ible and may be used in a wide variety of
applications.
Pin-Out Information
Pin
1
Ordering Information
Function
V
in
GND
V
out
PT78ST1
XX Y
Output Voltage
33
= 3.3 Volts
36
= 3.6 Volts
05
= 5.0 Volts
51
= 5.1 Volts
53
= 5.25 Volts
06
= 6.0 Volts
65
= 6.5 Volts
07
= 7.0 Volts
08
= 8.0 Volts
09
= 9.0 Volts
10
= 10.0 Volts
12
= 12.0 Volts
14
= 13.9 Volts
15
= 15.0 Volts
PT78ST100 SERIES
Standard Application
Vin
1
2
3
Package Suffix
V
= Vertical Mount
S
= Surface Mount
H
= Horizontal
Mount
PT78ST100
2
3
Vout
+
COM
C1
COM
C2
C1 = Optional 1碌F ceramic
C2 = Required 100碌F electrolytic
Specifications
Characteristics
(T
a
= 25擄C unless noted)
Output Current
Short Circuit Current
Input Voltage Range
Symbols
I
o
I
sc
V
in
鈭哣
o
Reg
line
Reg
load
V
n
t
tr
畏
Pkg Style 500
Conditions
Over V
in
range
V
in
= V
in
min
Min
0.1*
鈥?/div>
V
o
= 3.3V
V
o
= 5V
V
o
= 12V
9
9
16
鈥?/div>
鈥?/div>
鈥?/div>
V
o
= 5V
V
o
= 12V
鈥?/div>
鈥?/div>
鈥?/div>
V
o
= 3.3V
V
o
= 5V
V
o
= 12V
鈥?/div>
鈥?/div>
鈥?/div>
600
-40
-40
鈥?/div>
-40
鈥?/div>
鈥?/div>
鈥?/div>
Typ
鈥?/div>
3.5
鈥?/div>
鈥?/div>
鈥?/div>
鹵1.0
鹵0.2
鹵0.1
65
90
100
5
80
85
90
650
鈥?/div>
鈥?/div>
45
鈥?/div>
500
5
6.5
Max
1.5
鈥?/div>
26
38
38
鹵2.0
鹵0.4
鹵0.2
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
700
+85
+80**
鈥?/div>
+125
鈥?/div>
鈥?/div>
鈥?/div>
Units
A
Apk
V
V
V
%Vo
%Vo
%Vo
mV
pp
mV
pp
碌Sec
%Vo
%
%
%
kHz
擄C
擄C
擄C/W
擄C
G鈥檚
G鈥檚
grams
0.1
鈮?/div>
I
o
鈮?/div>
1.5A
Over V
in
range, I
o
=1.5A
T
a
= 0擄C to +60擄C
Output Voltage Tolerance
Line Regulation
Load Regulation
V
o
Ripple/Noise
Transient Response
(with 100碌F output cap)
Efficiency
Over V
in
range
0.1
鈮?/div>
I
o
鈮?/div>
1.5A
V
in
= 9V, I
o
= 1.5A
V
in
= 16V, I
o
= 1.5A
50% load change
V
o
over/undershoot
V
in
= 10V, I
o
= 1A
V
in
= 10V, I
o
= 1A
V
in
= 17V, I
o
= 1A
Over V
in
range, I
o
=1.5A
鈥?/div>
Free Air Convection, (40-60LFM)
At V
in
= 24V, I
o
=1.0A
Free Air Convection, (40-60LFM)
鈥?/div>
Per Mil-STD-883D, Method 2002.3
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, soldered in a PC board
鈥?/div>
**See Thermal Derating chart.
Switching Frequency
Absolute Maximum
Operating T
emperature Range
Recommended Operating
Temperature Range
Thermal Resistance
Storage Temperature
Mechanical Shock
Mechanical Vibration
Weight
茠
o
T
a
T
a
胃
ja
T
s
鈥?/div>
鈥?/div>
鈥?/div>
*ISR will operate down to no load with reduced specifications.
Note:
The PT78ST100 Series requires a 100碌F electrolytic or tantalum output capacitor for proper operation in all applications.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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