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78ST305HC PDF预览

78ST305HC

更新时间: 2024-02-21 14:43:00
品牌 Logo 应用领域
德州仪器 - TI 稳压器开关
页数 文件大小 规格书
3页 192K
描述
3 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR

78ST305HC 数据手册

 浏览型号78ST305HC的Datasheet PDF文件第2页浏览型号78ST305HC的Datasheet PDF文件第3页 
For assistance or to order, call (800) 531-5782  
7 8 S T 3 0 0 S e r i e s  
3 AMP POSITIVE STEP-DOWN  
INTEGRATED SWITCHING REGULATOR  
Revised 6/30/98  
The 78ST300 is a series of wide  
High Efficiency > 80%  
input voltage, 3 terminal Integrated  
Switching Regulators (ISRs). Employ-  
ing a ceramic substrate, these ISRs  
have a maximum output current of 3A.  
The output voltage is laser trimmed  
for high accuracy.  
Wide Input Range  
Self-Contained Inductor  
Short-Circuit Protection  
Over-Temperature Protection  
Fast Transient Response  
The 78ST300 series regulators  
have internal short-circuit and over-  
temperature protection and may be  
used in a wide variety of applications.  
Ordering Information  
Pin-Out Information  
78ST3  
C
Y
XX  
Pin No. Function  
Standard Application  
1
2
3
V
in  
GND  
Vout  
Output Voltage  
Package Suffix  
Vin  
Vout  
GND  
1
3
V = Vertical Mount  
H = Horizontal  
Mount  
05 = 5.0 Volts  
78ST300  
2
+
C1  
GND  
C2  
(For dimensions and PC board  
layout see Package Style 600.)  
C1 = Optional 1µF ceramic  
C2 = Required 100µF electrolytic  
Specifications  
78ST300 SERIES  
Characteristics  
(Ta = 25°C unless noted)  
Symbols  
Conditions  
Min  
0.1*  
8
Typ  
Max  
3.0  
20  
Units  
A
Output Current  
Io  
Over Vin range  
Input Voltage Range  
Output Voltage Tolerance  
Vin  
Vo  
Io = 0.1 to 3.0A  
Over Vin range  
Ta = 0°C to +60°C  
V
±1.0  
±2.0  
%Vo  
Line Regulation  
Load Regulation  
Ripple/Noise  
Regline  
Regload  
Vn  
Over Vin range  
±0.4  
±0.2  
1
±0.8  
±0.4  
%Vo  
%Vo  
%Vo  
0.1 Io 3.0A  
Vin = Vin min, Io = 3.0A  
Transient Response  
(with 100µF output cap)  
ttr  
50% load change  
Vo over/undershoot  
100  
5.0  
µSec  
%Vo  
Efficiency  
η
Vin = 9V, Io = 3.0A  
80  
%
Switching Frequency  
ƒo  
Over Vin and Io ranges  
0.95  
1.0  
1.05  
MHz  
Absolute Maximum  
Operating Temperature Range  
Ta  
-40  
+70  
°C  
Recommended Operating  
Temperature Range  
Ta  
Free Air Convection, (40-60LFM)  
Over Vin and Io ranges  
-40  
+70**  
°C  
Thermal Resistance  
Storage Temperature  
Mechanical Shock  
Mechanical Vibration  
θja  
Ts  
Free Air Convection, (40-60LFM)  
35  
°C/W  
°C  
-40  
+125  
Per Mil-STD-883D, Method 2002.3  
500  
G’s  
Per Mil-STD-883D, Method 2007.2,  
20-2000 Hz, soldered in a PC board  
10  
11  
G’s  
Weight  
Grams  
*
ISR will operate down to no load with reduced specifications.  
** See Thermal Derating chart.  
Note: The 78ST300 Series requires a 100µF 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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