ADM869L 데이터 시트보기 (PDF) - Analog Devices
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ADM869L Datasheet PDF : 8 Pages
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FEATURES
2 A Load Current
45 m⍀ On Resistance
User-Settable Current Limit
12 A Typical Quiescent Current
10 nA Typical Shutdown Current
40 nA Typical Switch Off Leakage
Short-Circuit Protection
Thermal Shutdown
FAULT Output
Small, 16-Lead QSOP Package
APPLICATIONS
Desktop Computers
Palmtop Computers
Notebook Computers
Hand-Held Instruments
Universal Serial Bus (USB)
2 A, High-Side P-Channel Switch with
Current Limit and Thermal Shutdown
ADM869L
GENERAL DESCRIPTION
The ADM869L is a logic controlled P-channel switch with low
on resistance, capable of sourcing up to 2 A from supply voltages
between 2.7 V and 5.5 V. A user-settable current limit allows
the trip current to be set between 400 mA and 2 A with an
accuracy of ± 21%. This allows the system power supply to be
protected against short circuits and surge currents in peripheral
loads powered via the ADM869L. Over-current and over-
temperature conditions are signalled by a FAULT output.
The ADM869L also offers low quiescent current of typically
12 µA and shutdown current of typically 10 nA.
FUNCTIONAL BLOCK DIAGRAM
IN
(2.7V TO 5.5V)
22F
ON
MAIN FET
OUT
MIRROR FET
MIRROR
AMPLIFIER
ON
ADM869L
ON
TEMPERATURE
SENSOR AND
CONTROL
CIRCUITRY
OVERTEMP
CURRENT
LIMIT
AMPLIFIER
ON
1.24V
BANDGAP
REFERENCE
ON
0.1F
SET
VPULLUP
0 TO 5.5V
RSET
RPULLUP
10k⍀ TO 100k⍀
FAULT
GND
REV. A
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 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000
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