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ADP3089ACP PDF预览

ADP3089ACP

更新时间： 2024-11-05 08:19:35
品牌 Logo 应用领域
亚德诺 - ADI 稳压器
页数 文件大小 规格书
4页 101K
描述
1 MHz, 1 A Buck Regulator

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ADP3089ACP 数据手册

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PRELIMINARY TECHNICAL DATA  
a
1 MHz, 1 A Buck Regulator  
Preliminary Technical Data  
ADP3089  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
1 MHz PWM Frequency  
Ultrasmall 8-lead 3×3 Sq. mm Chip Scale Package  
Automatic PWM to Power Saving Mode at Light Load  
Fully Integrated 1.5 A Power Switch  
3% Output Regulation Accuracy over Temperature,  
Line, and Load  
SW  
IN  
IN  
CURRENT  
SENSE  
AMP  
DRV  
PWM  
COMPARATOR  
1MHz  
S
R
Q
100% Duty Cycle Operation  
SimpleCompensation  
Output Voltage: 1.25 V to 10 V  
Small Inductor and MLC Capacitors  
Low Quiescent Current while Pulse Skipping  
ThermalShutdown  
Fully Integrated Soft Start  
Cycle-by-cycle Current Limit  
PROTECTION  
LOGIC  
(ILIM, OT)  
RUN/STOP  
COMPARATORS  
ERROR  
AMP  
FB  
g
COMP  
GND  
m
SOFT-START  
TIMER  
+
REF  
1.245V  
GND  
APPLICATONS  
PDAs and Palmtop Computers  
Notebook Computers  
PCMCIA Cards  
Bus Products  
Portable Instruments  
Industrial Systems  
10µH  
ADP3089  
SW  
V
V
IN  
IN  
OUT  
1.8V@1A  
20BQ030  
10µF  
0.1µF  
IN  
DRV  
GND  
GENERAL DESCRIPTION  
18.2kΩ  
GND  
COMP  
The ADP3089 is a high frequency, non-synchronous PWM  
step-down DC-DC regulator with an integrated 1.5 A  
power switch in a space-saving chip scale package. It pro-  
vides high efficiency, excellent dynamic response, and is  
very simple to use.  
22µF  
FB  
41.2kΩ  
47pF  
470pF  
10.7kΩ  
The ADP3089’s 1 MHz switching frequency allows for  
small, inexpensive external components, and the current  
mode control loop is simple to compensate and eases noise  
filtering. It operates in PWM current mode under heavy  
loads and saves energy at lighter loads by switching auto-  
matically into Power Saving mode. Soft start is integrated  
completely on chip, as is the cycle-by-cycle current limit.  
Figure 1. Typical Application  
Capable of operating from 2.5 V to 11 V input with a  
typical output current of 1 A, it is ideal for portable, bat-  
tery powered, industrial, PC and instrumentation applica-  
tions. Supporting output voltages down to 1.25 V, the  
ADP3089 is ideal to generate low voltage rails, providing  
the optimal solution in its class for delivering power effi-  
ciently, responsively, and simply with minimal printed  
circuit board area.  
The device is specified over the industrial temperature  
range of -40°C to +85°C, and is offered in an ultrasmall 8-  
lead 3×3 square mm chip scale package.  
REV. PrE  
8/26/02  
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., 2002  
1234

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