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78ST212SERIES PDF预览

78ST212SERIES

更新时间: 2024-11-25 23:24:47
品牌 Logo 应用领域
德州仪器 - TI 稳压器开关放大器
页数 文件大小 规格书
3页 189K
描述
12V 2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR

78ST212SERIES 数据手册

 浏览型号78ST212SERIES的Datasheet PDF文件第2页浏览型号78ST212SERIES的Datasheet PDF文件第3页 
For assistance or to order, call (800) 531-5782  
7 8 S T 2 1 2 S e r i e s  
12V 2 AMP POSITIVE STEP-DOWN  
INTEGRATED SWITCHING REGULATOR  
Revised 6/30/98  
High Efficiency > 87%  
Wide Input Range  
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.  
Aluminum Heatsink for  
Applications with Airflow  
Self-Contained Inductor  
Short Circuit Protection  
Over-Temperature Protection  
Pin-Out Information  
Ordering Information  
78ST2 XX Y C  
Pin Function  
Vin  
1
2
3
GND  
Vout  
Standard Application  
Output Voltage  
Package Suffix  
12 = 12.0 Volts  
V = Vertical Mount  
H = Horizontal Mount  
Vin  
1
Vout  
GND  
3
78ST212  
+
C1  
GND  
2
C2  
(For dimensions and PC board  
layout see Package Style 600.)  
C1 = Optional 1µF ceramic  
C2 = Required 100µF electrolytic  
Specifications  
78ST212 SERIES  
Characteristics  
(Ta = 25°C unless noted)  
Symbols  
Conditions  
Min  
Typ  
Max  
Units  
Output Current  
Io  
Over Vin range  
With forced air cooling  
0.1*  
2.0  
A
Input Voltage Range  
Output Voltage Tolerance  
Vin  
Vo  
0.1 Io 2.0A  
Over Vin range, Io= 2.0A  
Ta= 0°C to +55°C  
14.5  
28  
V
±1.0  
±2.0  
%Vo  
Line Regulation  
Load Regulation  
Vo Ripple/Noise  
Regline  
Regload  
Vn  
Over Vin range  
±0.4  
±0.2  
1.0  
±0.8  
±0.4  
%Vo  
%Vo  
%Vo  
0.1 Io 2.0A  
Vin=17V, Io=2.0A, Vo=12V  
Transient Response  
(with 100µF output cap)  
ttr  
50% load change  
Vo over/undershoot  
100  
3.0  
µSec  
%Vo  
Efficiency  
η
Vin=17V, Io=2.0A  
Over Vin and Io ranges  
87  
1.0  
%
Switching Frequency  
ƒo  
Ta  
0.95  
-40  
1.05  
+65  
MHz  
°C  
Absolute Maximum  
Operating Temperature Range  
Recommended Operating  
Temperature Range  
Ta  
Free Air Convection, (40-60LFM)  
at Vin= 24V, Io=2A  
-40  
+55**  
°C  
Thermal Resistance  
Storage Temperature  
Mechanical Shock  
θja  
Ts  
Free Air Convection, (40-60LFM)  
35  
°C/W  
°C  
-40  
+125  
Per Mil-STD-883D, Method 2002.3  
500  
G’s  
Mechanical Vibration  
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 78ST212 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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