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ADP1109AR-33 датащи(PDF) 1 Page - Analog Devices

номер детали ADP1109AR-33
подробное описание детали  Micropower Low Cost Fixed 3.3 V, 5 V, 12 V and Adjustable DC-to-DC Converter
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
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ADP1109AR-33 датащи(HTML) 1 Page - Analog Devices

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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.
a
ADP1109
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1998
Micropower Low Cost
Fixed 3.3 V, 5 V, 12 V and Adjustable
DC-to-DC Converter
FUNCTIONAL BLOCK DIAGRAMS
DRIVER
SW
VIN
GND
COMPARATOR
A1
R1
SENSE
R2
250k
SHUTDOWN
+
ADP1109-3.3: R1 = 152k
ADP1109-5:
R1 = 83k
ADP1109-12: R1 = 29k
Q1
120kHz
OSCILLATOR
1.25V
REFERENCE
Fixed Output
DRIVER
SW
VIN
GND
COMPARATOR
A1
FB
SHUTDOWN
+
ADP1109
Q1
120kHz
OSCILLATOR
1.25V
REFERENCE
Adjustable Output
FEATURES
Operates at Supply Voltages 2 V to 12 V
Fixed 3.3 V, 5 V, 12 V and Adjustable Output
Minimum External Components Required
Ground Current: 320
A
Oscillator Frequency: 120 kHz
Logic Shutdown
8-Lead DIP and SO-8 Packages
APPLICATIONS
Cellular Telephones
Single-Cell to 5 V Converters
Laptop and Palmtop Computers
Pagers
Cameras
Battery Backup Supplies
Portable Instruments
Laser Diode Drivers
Hand-Held Inventory Computers
GENERAL DESCRIPTION
The ADP1109 is a versatile step-up switching regulator. The
device requires only minimal external components to operate as
a complete switching regulator.
The ADP1109-5 can deliver 100 mA at 5 V from a 3 V input
and the ADP1109-12 can deliver 60 mA at 12 V from a 5 V
input. The device also features a logic controlled shutdown
capability that, when a logic low is applied, will shut down the
oscillator.
The 120 kHz operating frequency allows for the use of small
surface mount components. The gated oscillator capability
eliminates the need for frequency compensation.
TYPICAL APPLICATION
SW
GND
ADP1109-12
+
D1
C1
22 F
16V
SENSE
L1
33 H
VIN
5V
VIN
SHUTDOWN
SHUTDOWN/PROGRAM
VOUT
12V
60mA
Flash Memory VPP Generator


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