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ADP3050AR-33 PDF预览

ADP3050AR-33

更新时间: 2024-11-04 22:07:03
品牌 Logo 应用领域
亚德诺 - ADI 稳压器开关
页数 文件大小 规格书
16页 192K
描述
200 kHz, 1 A High-Voltage Step-Down Switching Regulator

ADP3050AR-33 数据手册

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200 kHz, 1 A High-Voltage  
Step-Down Switching Regulator  
a
ADP3050  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
Wide Input Voltage Range: 3.6 V to 30 V  
Adjustable and Fixed (3.3 V, 5 V) Output Options  
Integrated 1 A Power Switch  
Uses Small Surface-Mount Components  
Cycle-By-Cycle Current Limiting  
Peak Input Voltage (100 ms): 60 V  
Thermally Enhanced 8-Lead SOIC Package  
Configurable as a Buck, Buck-Boost and SEPIC  
Regulator  
BIAS  
IN  
CURRENT SENSE  
AMPLIFIER  
2.5V  
REGULATOR  
SD  
GND  
FREQUENCY  
AND CURRENT LIMIT  
FOLDBACK  
CURRENT  
LIMIT  
APPLICATIONS  
Industrial Power Systems  
PC Peripheral Power Systems  
Preregulator for Linear Regulators  
Distributed Power Systems  
Automotive Systems  
+
200kHz  
OSCILLATOR  
BOOST  
FB  
CMP  
Battery Chargers  
S
R
Q
DRIVER  
SWITCH  
g
m
ADP3050  
1.2V  
COMP  
GENERAL DESCRIPTION  
The ADP3050 includes a shutdown input that places the device  
in a low-power mode, reducing the total supply current to under  
20 µA. Internal protection features include thermal shutdown  
circuitry and a cycle-by-cycle current-limit for the power switch  
to provide complete device protection under fault conditions.  
The ADP3050 is a current-mode monolithic buck (step-down)  
PWM switching regulator that contains a high current 1 A power  
switch and all control, logic, and protection functions. It uses a  
unique compensation scheme that allows the use of any type of  
output capacitor (tantalum, ceramic, electrolytic, OS-CON).  
Unlike some buck regulators, the design is not restricted to using  
a specific type of output capacitor or ESR value.  
The ADP3050 provides excellent line and load regulation,  
maintaining typically less than 3% output voltage accuracy  
over temperature and under all input voltage and output current  
conditions.  
A special boosted drive stage is used to saturate the NPN power  
switch, providing a system efficiency higher than conventional  
bipolar buck switchers. Further efficiency improvements are ob-  
tained by using the low voltage regulated output to provide the  
device's internal operating current. A high switching frequency  
allows the use of small external surface-mount components. A  
wide variety of standard off-the-shelf devices can be used, pro-  
viding a great deal of design flexibility. A complete regulator  
design requires only a few external components.  
The ADP3050 is specified over the industrial temperature range of  
–40°C to +85°C and is available in a thermally enhanced 8-lead  
SOIC package.  
REV. 0  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, nor for any infringements of patents or other rights of third parties  
which may result from its use. No license is granted by implication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 2000  

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