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参数资料
型号： 78HT253HC
厂商： Texas Instruments, Inc.
元件分类： 基准电压源/电流源
英文描述： RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述： 抗辐射高效，5安培开关稳压器
文件页数： 1/5页
文件大小： 485K
代理商： 78HT253HC
For assistance or to order, call
(800) 531-5782
7 8 H T 2 0 0
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902
http://www.powertrends.com
2 AMP POSITIVE STEP-DOWN
INTEGRATED SWITCHING REGULATOR
S e r i e s
Standard Application
C1 = Optional 1μF ceramic
C2
= Required 100μF electrolytic
Pin-Out Information
Pin No.
Function
1
2
3
V
i
n
GND
V
out
Ordering Information
78HT2 C
Output Voltage
33
= 3.3 Volts
46
= 4.6 Volts
05
= 5.0 Volts
53
= 5.25 Volts
65
= 6.5 Volts
75
= 7.5 Volts
10
= 10.0 Volts
(For dimensions and PC board
layout see Package Style 500.)
Package Suffix
V
= Vertical Mount
S
= Surface Mount
H
= Horizontal
Mount
High Efficiency > 82%
Wide Input Range
Self-Contained Inductor
Short-Circuit Protection
Over-Temperature Protection
Fast Transient Response
The 78HT200 is a series of wide
input voltage, 3 terminal Integrated
Switching Regulators (ISRs). Employ-
ing a ceramic substrate, these ISRs
have a maximum output current of 2A.
The output voltage is laser trimmed
for high accuracy.
The 78HT200 series regulators
have internal short-circuit and over-
temperature protection and may be
used in a wide variety of applications.
78HT200
C2
+
Vout
GND
GND
Vin
C1
1
2
3
Specifications
Characteristics
(T
a
= 25°C unless noted)
Output Current
Input Voltage Range
78HT200 SERIES
Min
Symbols
Conditions
Typ
Max
Units
I
o
V
in
Over V
in
range
I
o
= 0.1 to 2.0A
0.1*
7
V
o
+2V
—
—
—
2.0
15
28
A
V
V
V
o
< 4.6V
V
o
> 4.6V
Output Voltage Tolerance
V
o
Over V
range, I
o
= 2.0A
T
a
= 0°C to +60°C
Over V
in
range
0.1
≤
I
o
≤
2.0A
V
in
= V
in
min
, I
o
= 2.0A
50% load change
V
o
over/undershoot
V
in
= 9V, I
o
= 2.0A, V
o
= 5V
Over V
in
and I
o
ranges V
o
> 4.6V
—
±1.0
±2.0
%Vo
Line Regulation
Load Regulation
Ripple/Noise
Transient Response
(with 100μF output cap)
Efficiency
Switching Frequency
Reg
line
Reg
load
V
n
t
tr
—
—
—
—
±0.4
±0.2
1
100
5.0
82
750
1.0
±0.8
±0.4
—
—
%V
o
%V
o
%Vo
μSec
%V
o
%
kHz
MHz
η
o
—
700
0.95
—
800
1.05
V
o
= 3.3V
Absolute Maximum
Operating Temperature Range
T
a
—
-40
—
+85
°C
Recommended Operating
Temperature Range
Thermal Resistance
Storage Temperature
Mechanical Shock
Mechanical Vibration
T
a
Free Air Convection, (40-60LFM)
Over V
in
and I
o
ranges
Free Air Convection, (40-60LFM)
—
Per Mil-STD-883D, Method 2002.3
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, soldered in a PC board
—
-40
—
+85**
°C
θ
ja
T
s
—
—
—
-40
—
38
—
500
—
+125
—
°C/W
°C
G’s
—
5
—
G’s
Weight
—
—
7
—
Grams
* ISR will operate down to no load with reduced specifications.
** See Thermal Derating chart.
Note:
The 78HT200 Series requires a 100μF electrolytic or tantalum output capacitor for proper operation in all applications.
Revised 9/22/99
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相关代理商/技术参数
参数描述
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