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PT78ST108H Datasheet(PDF) 1 Page - Texas Instruments

Part # PT78ST108H
Description  Very Small Footprint
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

PT78ST108H Datasheet(HTML) 1 Page - Texas Instruments

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For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Standard Application
C1 = Optional 1µF ceramic
C2 = Required 100µF electrolytic
Pin-Out Information
Pin
Function
1Vin
2
GND
3Vout
Ordering Information
PT78ST1 XX Y
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
Package Suffix
V
= Vertical Mount
S
= Surface Mount
H
= Horizontal
Mount
1.5 Amp Positive Step-Down
Integrated Switching Regulator
Very Small Footprint
High Efficiency > 85%
Self-Contained Inductor
Internal Short-Circuit Protection
Over-Temperature 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.
PT78ST100 Series
Output Voltage
Specifications
Characteristics
PT78ST100 SERIES
(T
a = 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Over Vin range
0.1*
1.5
A
Short Circuit Current
Isc
Vin = Vin min
3.5
Apk
Input Voltage Range
Vin
0.1
≤ Io ≤ 1.5A
Vo= 3.3V
9
26
V
Vo= 5V
9
38
V
Vo= 12V
16
38
V
Output Voltage Tolerance
∆Vo
Over Vin range, Io=1.5A
±1.0
±2.0
%Vo
Ta = 0°C to +60°C
Line Regulation
Regline
Over Vin range
±0.2
±0.4
%Vo
Load Regulation
Regload
0.1
≤ Io ≤ 1.5A
±0.1
±0.2
%Vo
Vo Ripple/Noise
Vn
Vin= 9V, Io= 1.5A
Vo= 5V
65
mVpp
Vin= 16V, Io= 1.5A
Vo= 12V
90
mVpp
Transient Response
ttr
50% load change
100
µSec
(with 100µF output cap)
Vo over/undershoot
5
%Vo
Efficiency
η
Vin= 10V, Io= 1A
Vo= 3.3V
80
%
Vin= 10V, Io= 1A
Vo= 5V
85
%
Vin= 17V, Io= 1A
Vo= 12V
90
%
Switching Frequency
ƒo
Over Vin range, Io=1.5A
600
650
700
kHz
Absolute Maximum
Ta
-40
+85
°C
Operating Temperature Range
Recommended Operating
Ta
Free Air Convection, (40-60LFM)
Temperature Range
At Vin= 24V, Io=1.0A
-40
+80**
°C
Thermal Resistance
θja
Free Air Convection, (40-60LFM)
45
°C/W
Storage Temperature
Ts
-40
+125
°C
Mechanical Shock
Per Mil-STD-883D, Method 2002.3
500
G’s
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2,
—5
G’s
20-2000 Hz, soldered in a PC board
Weight
6.5
grams
*ISR will operate down to no load with reduced specifications.
**See Thermal Derating chart.
Note: The PT78ST100 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.
PT78ST100
C2
+
Vout
COM
COM
Vin
C1
1
2
3
Pkg Style 500
SLTS059A
(Revised 6/30/2000)


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