鈥?/div>
High Efficiency: Up to 90%
Wide Input Range
Self-Contained Inductor
Short-Circuit Protection
Over-Temperature Protection
Fast Transient Response
The PT78HT200 is a series of fixed
output, wide-input range, 3-terminal
Integrated Switching Regulators (ISRs).
These ISRs have a maximum output
current of 2A. The output voltage is
also laser trimmed for high accuracy.
Features include excellent line and
load regulation, internal short-circuit
and over-temperature protection.
The PT78HT200 series is available
in three package outlines, including
horizontal SMD. Their small size and
output voltage selection makes these
regulators ideal for use in a variety
of applications.
Pin-Out Information
Pin
Function
V
i
n
GND
V
out
1
2
3
Vin
1
3
Ordering Information
PT78HT2
XX Y
Output Voltage
33
= 3.3 Volts
05
= 5.0 Volts
53
= 5.25 Volts
65
= 6.5 Volts
08
= 8.0 Volts
Package Suffix
V
= Vertical Mount
S
= Surface Mount
H
= Horizontal
Mount
Standard Application
PT78HT200
2
Vout
+
COM
C1
COM
C2
C1 = Optional 1碌F ceramic
C2 = Required 100碌F electrolytic
(1)
Pkg Style 500
Specifications
Characteristics
(T
a
= 25擄C unless noted)
Output Current
Short Circuit Current
Input Voltage Range
PT78HT200 SERIES
Symbols
I
o
I
sc
V
in
Conditions
Over V
in
range
V
in
= V
in
min
0.1
鈮?/div>
I
o
鈮?/div>
2.0A
V
o
=3.3V
V
o
=5.0V
V
o
=6.5V
V
o
=8.0V
Min
0.1
(2)
鈥?/div>
9
9
10.5
12
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
V
o
=3.3V
V
o
=5.0V
V
o
=8.0V
V
o
鈮?.0V
V
o
=3.3V
鈥?/div>
鈥?/div>
鈥?/div>
700
950
-40
鈥?/div>
-40
鈥?/div>
鈥?/div>
鈥?/div>
Typ
鈥?/div>
6.0
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鹵1.0
鹵0.4
鹵0.2
鹵1
100
5.0
80
85
90
750
1,000
鈥?/div>
40
鈥?/div>
500
5
6.5
Max
2.0
鈥?/div>
15
28
28
28
鹵2.0
鹵0.8
鹵0.4
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
800
1,050
+85
(3)
鈥?/div>
+125
鈥?/div>
鈥?/div>
鈥?/div>
Units
A
Apk
V
%Vo
%Vo
%Vo
%Vo
碌Sec
%Vo
%
kHz
擄C
擄C/W
擄C
G鈥檚
G鈥檚
Grams
Output Voltage Tolerance
Line Regulation
Load Regulation
Vo Ripple/Noise
Transient Response
(with 100碌F output cap)
Efficiency
鈭哣
o
Reg
line
Reg
load
V
n
t
tr
畏
Over V
in
range, I
o
= 2.0A
T
a
= 0擄C to +60擄C
Over V
in
range
0.1
鈮?/div>
I
o
鈮?/div>
2.0A
V
in
= V
in
min, I
o
= 2.0A
50% load change
Vo over/undershoot
V
in
=9V, I
o
= 2.0A
V
in
=12V, I
o
=2.0A
V
in
=15V, I
o
=2.0A
Over V
in
and I
o
ranges
Over V
in
range
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>
Switching Frequency
Absolute Maximum
Operating Temperature Range
Thermal Resistance
Storage Temperature
Mechanical Shock
Mechanical Vibration
Weight
茠
o
T
a
胃
ja
T
s
鈥?/div>
鈥?/div>
鈥?/div>
Notes:
(1) The PT78HT200 Series requires a 100碌F electrolytic or tantalum output capacitor for proper operation in all applications.
(2) ISR will operate down to no load with reduced specifications.
(3) See Safe Operating Area curves for derating
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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