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ADM869LARQADN/a294avai2 A, High-Side P-Channel Switch with Current Limit and Thermal Shutdown
ADM869LARQADIN/a6avai2 A, High-Side P-Channel Switch with Current Limit and Thermal Shutdown


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ADM869LARQ
2 A, High-Side P-Channel Switch with Current Limit and Thermal Shutdown
REV.A
2 A, High-Side P-Channel Switch with
Current Limit and Thermal Shutdown
FUNCTIONAL BLOCK DIAGRAM
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)
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 typicallyµA and shutdown current of typically 10 nA.
ADM869L–SPECIFICATIONS(VCC = 3.0 V, TA = –40�C to +85�C1, unless otherwise noted.)
NOTESSpecifications to –40°C are guaranteed by design, not tested.Guaranteed by design. Derived from the ISET current ratio, current-limit amplifier and external set resistor accuracies.Tested with IOUT = 200 mA and VSET adjusted until (VIN – VOUT) � 0.8 V.
Specifications subject to change without notice.
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS*

(TA = 25°C unless otherwise noted)
IN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V
ON, FAULT to GND . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V
SET, OUT to GND . . . . . . . . . . . . . . –0.3 V to (VIN + 0.3 V)
Maximum Continuous Switch Current . . . . . . . . . . . . . . . 3 A
Continuous Power Dissipation (TA = 70°C) . . . . . . . 667 mW
QSOP (Derate 8.3 mW/°C above 70°C)
Operating Temperature Range
Industrial (A Version) . . . . . . . . . . . . . . . .–40°C to +85°C
Storage Temperature Range . . . . . . . . . . . .–65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . 300°C
ESD Rating (Outputs) . . . . . . . . . . . . . . . . . . . . . . . . . . 15 kV
(Other Pins) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV
*This is a stress rating only; functional operation of the device at these or any other
conditions above those indicated in the operation sections of this specification is
not implied. Exposure to absolute maximum rating conditions for extended
periods of time may affect reliability.
THERMAL CHARACTERISTICS

16-Lead QSOP Package:
θJA = 50°C/W, θJC = 10°C/W
PIN FUNCTION DESCRIPTIONS
ADM869L–Typical Performance Characteristics
INPUT VOLTAGE – Volts
QUIESCENT CURRENT –
12453
TPC 1.Quiescent Current vs. Input Voltage
TPC 2.Quiescent Current vs. Temperature
TEMPERATURE – �C
CURRENT
nA
–20020406080

TPC 3.Off-Supply Current vs. Temperature
TEMPERATURE – �C
CURRENT
nA–40
–20020406080

TPC 4.Off-Switch Current vs. Temperature
TPC 5.Normalized On Resistance vs. Temperature
ISWITCH – A
OUT
SET
RATIO
1300

TPC 6.IOUT/ISET Ratio vs. Switch Current
TPC 7.Normalized Output Current vs. Output Voltage
TPC 8.Turn-On Time vs. Temperature
TEMPERATURE – �C
OFF
–20020406080

TPC 9.Turn-Off Time vs. Temperature
ADM869L
TPC 10.Fast Current-Limit Response
TPC 11.Slow Current-Limit Response
TPC 12.Load Transient Response
TPC 13. Switch Turn-On Time
TPC 14. Switch Turn-Off Time
TPC 15. USB Circuit Output Rise Time
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