鈥?/div>
High Efficiency > 80%
Wide Input Range
Self-Contained Inductor
Short-Circuit Protection
Over-Temperature Protection
Fast Transient Response
The 78HT300 is a series of wide
input voltage, 3 terminal Integrated
Switching Regulators (ISRs). Em-
ploying a ceramic substrate, these
ISRs have a maximum output current
of 3A. The output voltage is laser-
trimmed for high accuracy.
The 78HT300 series regulators
have internal short-circuit and over-
temperature protection and may be
used in a wide variety of applications.
Pin-Out Information
Standard Application
Vin
1
Ordering Information
Pin No.
Function
1
2
V
i
n
GND
V
out
78HT3
XX
Output Voltage
05
= 5.0 Volts
53
= 5.25 Volts
Y
C
Package Suffix
V
= Vertical Mount
H
= Horizontal
Mount
78HT300
2
3
Vout
+
GND
3
C1
GND
C2
C1 = Optional 1碌F ceramic
C2 = Required 100碌F electrolytic
(For dimensions and PC board
layout see Package Style 600.)
Specifications
Characteristics
(T
a
= 25掳C unless noted)
Output Current
Input Voltage Range
Output Voltage Tolerance
Line Regulation
Load Regulation
Ripple/Noise
Transient Response
(with 100碌F output cap)
Efficiency
Switching Frequency
Absolute Maximum
Operating Temperature Range
Recommended Operating
Temperature Range
Thermal Resistance
Storage Temperature
Mechanical Shock
Mechanical Vibration
Weight
** See Thermal Derating chart.
78HT300 SERIES
Symbols
I
o
V
in
鈭哣
o
Reg
line
Reg
load
V
n
t
tr
畏
茠
o
T
a
T
a
Conditions
Over V
in
range
I
o
= 0.1 to 3.0A
Over V
in
range
T
a
= 0掳C to +60掳C
Min
0.1*
V
o
+3
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
700
-40
Typ
鈥?/div>
鈥?/div>
卤1.0
卤0.4
卤0.2
1
100
5.0
80
750
鈥?/div>
Max
3.0
28
卤2.0
卤0.8
卤0.4
鈥?/div>
鈥?/div>
鈥?/div>
800
+70
Units
A
V
%Vo
%V
o
%V
o
%Vo
碌Sec
%V
o
%
kHz
掳C
Over V
in
range
0.1
鈮?/div>
I
o
鈮?/div>
3.0A
V
in
= V
in
min
, I
o
= 3.0A
50% load change
V
o
over/undershoot
V
in
= 9V, I
o
= 3.0A
Over V
in
and I
o
ranges
鈥?/div>
Free Air Convection, (40-60LFM)
Over V
in
and I
o
ranges
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>
-40
鈥?/div>
-40
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
35
鈥?/div>
500
10
11
+70**
鈥?/div>
+125
鈥?/div>
鈥?/div>
鈥?/div>
掳C
掳C/W
掳C
G鈥檚
G鈥檚
Grams
胃
ja
T
s
鈥?/div>
鈥?/div>
鈥?/div>
* ISR will operate down to no load with reduced specifications.
Note:
The 78HT300 Series requires a 100碌F electrolytic or tantalum output capacitor for proper operation in all applications.
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902
http://www.powertrends.com
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