AAT4618
Current Limited Load Switch
General Description
The AAT4618 SmartSwitch鈩?is a member of
AnalogicTech's Application Specific Power MOS-
FET鈩?(ASPM鈩? product family. It is a Current
Limited P-channel MOSFET power switch designed
for high-side load-switching applications operating
with inputs ranging from 2.4V to 5.5V which makes it
ideal for 2.5V, 3V and 5V systems. An integrated cur-
rent-limiting circuit protects the input supply from large
currents which potentially cause the supply to fall out
of regulation. In addition, the AAT4618 thermal over-
load protection limits power dissipation and junction
temperatures associated with prolonged periods of
operation in current limit. Due to its low R
DS(ON)
, the
AAT4618 can be used to control loads that require up
to 500mA even while operating at high ambient tem-
peratures. The ultra fast current-limit response to a
sudden short circuit is a mere 400ns which reduces
the requirements of local supply bypassing. An open
drain FAULT flag signals an over current or over tem-
perature condition after a 4ms timeout. Quiescent
current is a low 10碌A(chǔ) and in shutdown mode, the sup-
ply current decreases to less than 1碌A(chǔ).
The AAT4618 is available in a 5 pin SOT-23, and an
8 pin SC70JW specified over a -40 to 85擄C temper-
ature range.
The AAT4600 Series is a family of adjustable and
fixed SmartSwitch鈩?products with a range of current
handling capabilities. Available are single versions
with adjustable current limit (AAT4610, AAT4601) as
well as fixed current limit (AAT4625), and dual ver-
sions with fixed current limit (AAT4626, AAT4670).
Features
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SmartSwitch
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2.4V to 5.5V Input voltage range
500mA min current limit trip threshold
Fast transient response:
鈥?400ns response to short circuit
Low quiescent current
鈥?10碌A(chǔ) typical
鈥?< 1碌A(chǔ) with Switch off
125m鈩?typical R
DS(ON)
FAULT flag with 4ms blanking
Undervoltage Lockout
Thermal shutdown
Temp range -40 to 85擄C
4kV ESD Rating
5 pin SOT23 package
8 pin SC70JW package
Preliminary Information
Applications
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Peripheral ports
USB Ports
Notebook computers
Personal communication devices
Hot swap supplies
Typical Application
INPUT
IN
OUT
OUTPUT
AAT4618
100k
FAULT
C
IN
1碌F
ON
(ON)
ON (ON)
GND
C
OUT
0.47碌F
FAULT
GND
GND
4618.2002.2.0.9
1
AAT4618IGV-1-T1相關(guān)型號PDF文件下載
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