鈥?/div>
Over-Temperature Protection
The 78ST212 is a series of wide
input voltage, 3-terminal Integrated
Switching Regulators (ISRs). With a
surge capability of 3A and an output
voltage that is laser trimmed, it is ideal
for inductive load applications such as
disk drive motors.
Pin-Out Information
Pin
1
Ordering Information
Function
V
in
GND
V
out
78ST2
XX
Output Voltage
12
= 12.0 Volts
Y
C
Package Suffix
V
= Vertical Mount
H
= Horizontal Mount
Standard Application
Vin
1
2
3
Vout
+
GND
78ST212
2
3
C1
GND
C2
(For dimensions and PC board
layout see Package Style 600.)
C
1
= Optional 1碌F ceramic
C
2
= Required 100碌F electrolytic
Specifications
Characteristics
(T
a
= 25掳C unless noted)
Output Current
Input Voltage Range
Output Voltage Tolerance
Line Regulation
Load Regulation
V
o
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
78ST212 SERIES
Symbols
I
o
V
in
鈭哣
o
Reg
line
Reg
load
V
n
t
tr
畏
Conditions
Over V
in
range
With forced air cooling
0.1
鈮?/div>
I
o
鈮?/div>
2.0A
Over V
in
range, I
o
= 2.0A
T
a
= 0掳C to +55掳C
Over V
in
range
0.1
鈮?/div>
I
o
鈮?/div>
2.0A
V
in
=17V, I
o
=2.0A, V
o
=12V
50% load change
V
o
over/undershoot
V
in
=17V, I
o
=2.0A
Over V
in
and I
o
ranges
鈥?/div>
Free Air Convection, (40-60LFM)
at V
in
= 24V, I
o
=2A
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.
Min
0.1*
14.5
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
0.95
-40
-40
鈥?/div>
-40
鈥?/div>
鈥?/div>
鈥?/div>
Typ
鈥?/div>
鈥?/div>
卤1.0
卤0.4
卤0.2
1.0
100
3.0
87
1.0
鈥?/div>
鈥?/div>
35
鈥?/div>
500
10
11
Max
2.0
28
卤2.0
卤0.8
卤0.4
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
1.05
+65
+55**
鈥?/div>
+125
鈥?/div>
鈥?/div>
鈥?/div>
Units
A
V
%Vo
%V
o
%V
o
%V
o
碌Sec
%V
o
%
MHz
掳C
掳C
掳C/W
掳C
G鈥檚
G鈥檚
Grams
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 78ST212 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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