1
AAT4610A
DATA SHEET
Current Limited Load Switch
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201917A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 3, 2012
General Description
The AAT4610A SmartSwitch is a current limited P-channel
MOSFET power switch designed for high-side load
switching applications. This switch operates with inputs
ranging from 2.4V to 5.5V, making it ideal for both 3V
and 5V systems. An integrated current-limiting circuit
protects the input supply against large currents which
may cause the supply to fall out of regulation. The
AAT4610A is also protected from thermal overload which
limits power dissipation and junction temperatures. It
can be used to control loads that require up to 1A.
Current limit threshold is programmed with a resistor
from SET to ground. The quiescent supply current is
typically a low 9μA. In shutdown mode, the supply cur-
rent decreases to less than 1μA.
The AAT4610A is available in a Pb-free 5-pin SOT23 or
8-pin SC70JW package and is specified over the -40°C to
+85°C temperature range.
Features
• Input Voltage Range: 2.4V to 5.5V
• Programmable Over-Current Threshold
• Fast Transient Response:
▪ 400ns Response to Short Circuit
• Low Quiescent Current
▪ 9μA Typical
▪ 1μA Max with Switch Off
• 145mΩ Typical RDS(ON)
• Only 2.5V Needed for ON/OFF Control
• Under-Voltage Lockout
• Thermal Shutdown
• 4kV ESD Rating
• UL Approved—File No. E217765
• 5-Pin SOT23 or 8-Pin SC70JW Package
• Temperature Range: -40°C to +85°C
Applications
• Hot Swap Supplies
• Notebook Computers
• Peripheral Ports
• Personal Communication Devices
UL Recognized Component
Typical Application
AAT4610A
ON/(ON)
IN
SET
INPUT
GND GND
GND
OUT
SOT23-5
OUTPUT
ON (ON)
0.47μF
RSET
1μF
2
AAT4610A
DATA SHEET
Current Limited Load Switch
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201917A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 3, 2012
Pin Descriptions
Pin Number
Symbol Function
SOT23-5 SC70JW-8
1 5 OUT P-channel MOSFET drain. Connect a 0.47μF capacitor from OUT to GND.
2 6, 7, 8 GND Ground connection.
3 1 SET Current limit set input. A resistor from SET to ground sets the current limit for
the switch.
42ON Enable input. Two versions are available, active-high and active-low. See Order-
ing Information for details.
5 3, 4 IN P-channel MOSFET source. Connect a 1μF capacitor from IN to GND.
Pin Configuration
SOT23-5 SC70JW-8
(Top View) (Top View)
GND
IN
ON
SET
OUT
1
2
34
5
ON
IN
IN
GND
GND
GND
OUT
SET 1
2
3
45
6
7
8
3
AAT4610A
DATA SHEET
Current Limited Load Switch
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201917A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 3, 2012
Absolute Maximum Ratings1
TA = 25°C, unless otherwise noted.
Symbol Description Value Units
VIN IN to GND -0.3 to 6 V
VON ON(ON) to GND -0.3 to VIN + 0.3 V
VSET, VOUT SET, OUT to GND -0.3 to VIN + 0.3 V
IMAX Maximum Continuous Switch Current 2 A
TJOperating Junction Temperature Range -40 to 150 °C
TLEAD Maximum Soldering Temperature (at Leads) 300 °C
VESD ESD Rating2 - HBM 4000 V
Thermal Characteristics3
Symbol Description Value Units
JA Thermal Resistance (SOT23-5 or SC70JW-8) 150 °C/W
PDPower Dissipation (SOT23-5 or SC70JW-8) 667 mW
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions
specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
2. Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
3. Mounted on a demo board.
4
AAT4610A
DATA SHEET
Current Limited Load Switch
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201917A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 3, 2012
Electrical Characteristics
VIN = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.
Symbol Description Conditions Min Typ Max Units
VIN Operation Voltage 2.4 5.5 V
IQQuiescent Current VIN = 5V, ON (ON) = Active, IOUT = 0 9 25 μA
IQ(OFF) Off Supply Current ON (ON) = Inactive, VIN = 5.5V 1 μA
ISD(OFF) Off Switch Current ON (ON) = Inactive, VIN = 5.5V, VOUT = 0 0.01 1 μA
VUVLO Under-Voltage Lockout Rising Edge, 1% Hysteresis 1.8 2.4 V
RDS(ON) On Resistance
VIN = 5.0V, TA = 25°C 145 180
mΩVIN = 4.5V, TA = 25°C 150
VIN = 3.0V, TA = 25°C 190 230
TCRDS On Resistance Temperature Coeffi cient 2800 ppm/°C
ILIM Current Limit RSET = 6.8kΩ0.75 1 1.25 A
ILIM(MIN) Minimum Current Limit 130 mA
VON(L) ON (ON) Input Low Voltage VIN = 2.7V to 5.5V10.8 V
VON(H) ON (ON) Input High Voltage VIN = 2.7V to < 4.2V12.0 V
VIN ≥ 4.2V to 5.0V12.4
ION(SINK) ON (ON) Input Leakage VON = 5.5V 0.01 1 μA
TRESP Current Limit Response Time VIN = 5V 0.4 μs
TOFF Turn-Off Time VIN = 5V, RL = 10Ω412 μs
TON Turn-On Time VIN = 5V, RL = 10Ω12 200 μs
TSD Over-Temperature Threshold VIN = 5V TJ Increasing 125 °C
TJ Decreasing 115
1. For VIN outside this range, consult Typical ON (ON) Threshold curve.
5
AAT4610A
DATA SHEET
Current Limited Load Switch
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201917A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 3, 2012
Typical Characteristics
Unless otherwise noted, VIN = 5V, TA = 25°C.
Quiescent Current vs. Temperature
0
5
10
15
20
-40 -20 0 20 40 60 80 100 120
Temperature (
°
C)
Quiescent Current (μA)
Quiescent Current vs. Input Voltage
0
5
10
15
20
0123456
Input Voltage (V)
Quiescent Current (μA)
Output Current vs. Output Voltage
(RSET = 16kΩ)
0
0.2
0.4
0.6
012345
Output Voltage (V)
Output Current (A)
RDS(ON) vs. Temperature
0
20
40
60
80
100
120
140
160
180
200
220
240
-40 -20 0 20 40 60 80 100 120
Temperature (˚
˚
C)
RDS(ON) (mΩ)
Input = 3V
Input = 5V
Off-Supply Current vs. Temperature
0.01
0.1
1
10
-40 -20 0 20 40 60 80 100 120
Temperature (
°
C)
Off-Supply Current (μA)
Off-Switch Current vs. Temperature
Temperature (°
°
C)
Off-Switch Current (μA)
0.001
0.01
0.1
1
10
-40 -20 0 20 40 60 80 100 120
6
AAT4610A
DATA SHEET
Current Limited Load Switch
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201917A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 3, 2012
Typical Characteristics
Unless otherwise noted, VIN = 5V, TA = 25°C.
Turn-On vs. Temperature
(RLOAD = 10Ω; CLOAD = 0.47μF)
0
10
20
30
-40-200 20406080100
Temperature (
°
C)
Turn-On Time (μs)
VIN = 3V
VIN = 5V
Turn-Off vs. Temperature
(RLOAD = 10Ω; CLOAD = 0.47μF)
0
1
2
3
4
5
6
-40 -20 0 20 40 60 80 100
Temperature (
°
C)
Turn-Off Time (μs)
VIN = 3V
VIN = 5V
Turn-On
(RL = 10Ω; CL = 0.47μF)
-1
0
1
2
3
4
5
6
-10 -5 0 5 10 1520 2530 3540 45 50
Time (μs)
Voltage (V)
OutputON
Turn-Off
(RL = 10Ω
Ω
; CL = 0.47μF)
-1
0
1
2
3
4
5
6
-10-5 0 5 101520253035404550
Time (μs)
Voltage (V)
OutputON
0
1
2
3
4
5
6
7
8
-0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0
Time (μs)
Input and Output Voltage (V)
-4
-2
0
2
4
6
8
10
12
Output Current (A)
Input Voltage
Output Current
Output Voltage
VIH
VIH
VIL
and VIL vs. VIN
0.80
1.00
1.20
1.40
1.60
1.80
2.00
2.20
2.53.03.54.04.55.05.5
VIN (V)
7
AAT4610A
DATA SHEET
Current Limited Load Switch
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201917A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 3, 2012
Typical Characteristics
Unless otherwise noted, VIN = 5V, TA = 25°C.
RSET vs. ILIM
1
10
100
0.1 101
ILIM (A)
RSET (kΩ)
RSET Coefficient vs. ILIM
5
6
7
8
9
10
0 0.5 1 1.5 2
ILIM (A)
RSET ILIM Product (kV)
Current Limit vs. Temperature
-6
-4
-2
0
2
4
6
-50 - 25 0 25 50 75 100
Temperature (°C)
Current Limit (%)
RSET = 22.1k
VIN - VOUT= 0 .5V
8
AAT4610A
DATA SHEET
Current Limited Load Switch
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201917A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 3, 2012
Functional Block Diagram
Current
Limit
1.2V
Reference
Under-
Voltage
Lockout
Over-Temperature
Protection
OUT
SET
GND
RSET
ON (ON)
IN
Application Information
Setting Current Limit
In most applications, the variation in ILIM must be taken
into account when determining RSET. The ILIM variation is
due to processing variations from part to part, as well as
variations in the voltages at IN and OUT, plus the operat-
ing temperature. See charts “Current Limit vs.
Temperature” and “Output Current vs. VOUT
.” Together,
these three factors add up to a ±25% tolerance (see ILIM
specification in Electrical Characteristics section). Figure
1 illustrates a cold device with a statistically higher cur-
rent limit and a hot device with a statistically lower cur-
rent limit, both with RSET equal to 10.5kΩ. While the
chart, "RSET vs. ILIM” indicates an ILIM of 0.7A with an RSET
of 10.5kΩ, this figure shows that the actual current limit
will be at least 0.525A and no greater than 0.880A.
To determine RSET, start with the maximum current drawn
by the load and multiply it by 1.33 (typical ILIM = mini-
mum ILIM / 0.75). This is the typical current limit value.
Next, refer to “RSET vs. ILIM” and find the RSET that corre-
sponds to the typical current limit value. Choose the
largest resistor available that is less than or equal to it.
For greater precision, the value of RSET may also be cal-
culated using the ILIM RSET product found in the chart “RSET
Coefficient vs. ILIM.” The maximum current is derived by
multiplying the typical current for the chosen RSET in the
chart by 1.25. A few standard resistor values are listed
in Table 1.
Current Limit Using10.5kΩ
0
0.2
0.4
0.6
0.8
1
1.2
012345
VOUT (V)
ILIM (A)
0.88A
0.525A
Device with high current limit at -40°C
Device with low current limit at 85°C
Figure 1: Current Limit Using 10.5kΩ.
9
AAT4610A
DATA SHEET
Current Limited Load Switch
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201917A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 3, 2012
Overload Operation
0
1
2
3
4
5
-0.05 0 0.05 0.1 0.15 0.2 0.25 0.3
Output Voltage (V)
0
0.25
0.5
0.75
1
Output Current (A)
Output Current
Output V oltage
1Ωload is turned on at time = 0
Figure 2: Overload Operation.
RSET
(kΩ)
Current
Limit Typ
(mA)
Device Will
Not Current
Limit Below
(mA)
Device Always
Current Limits
Below (mA)
40.2 200 150 250
30.9 250 188 313
24.9 300 225 375
22.1 350 263 438
19.6 400 300 500
17.8 450 338 563
16.2 500 375 625
14.7 550 413 688
13.0 600 450 750
10.5 700 525 875
8.87 800 600 1000
7.50 900 675 1125
6.81 1000 750 1250
6.04 1100 825 1375
5.49 1200 900 1500
4.99 1300 975 1625
4.64 1400 1050 1750
Table 1: Current Limit RSET Values
Example: A USB port requires 0.5A. 0.5A multiplied by
1.33 is 0.665A. From the chart named “RSET vs. ILIM,” RSET
should be less than 11kΩ. 10.5kΩ is a standard value
that is a little less than 11kΩ but very close. The chart
reads approximately 0.700A as a typical ILIM value for
10.5kΩ. Multiplying 0.700A by 0.75 and 1.25 shows that
the AAT4610A will limit the load current to greater than
0.525A but less than 0.875A.
Operation in Current Limit
When a heavy load is applied to the output of the
AAT4610A, the load current is limited to the value of ILIM
determined by RSET (see Figure 2). Since the load is
demanding more current than ILIM, the voltage at the
output drops. This causes the AAT4610A to dissipate a
larger than normal quantity of power, and its die tem-
perature to increase. When the die temperature exceeds
an over-temperature limit, the AAT4610A will shut down
until is has cooled sufficiently, at which point it will
startup again. The AAT4610A will continue to cycle on
and off until the load is removed, power is removed, or
until a logic high level is applied to ON.
Enable Input
In many systems, power planes are controlled by inte-
grated circuits which run at lower voltages than the
power plane itself. The enable input ON of the AAT4610A
has low and high threshold voltages that accommodate
this condition. The threshold voltages are compatible
with 5V TTL and 2.5V to 5V CMOS.
Reverse Voltage
The AAT4610A is designed to control current flowing
from IN to OUT. If a voltage is applied to OUT which is
greater than the voltage on IN, large currents may flow.
This could cause damage to the AAT4610A.
10
AAT4610A
DATA SHEET
Current Limited Load Switch
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201917A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 3, 2012
Ordering Information
Package Enable Marking1Part Number (Tape and Reel)2
SOT23-5 ON (active low) ERXYY AAT4610AIGV-T1
SOT23-5 ON (active high) HXXYY AAT4610AIGV-1-T1
SC70JW-8 ON (active low) FKXYY AAT4610AIJS-T1
SC70JW-8 ON (active high) HXXYY AAT4610AIJS-1-T1
Skyworks Green™ products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to Skyworks
Definition of Green™, document number
SQ04-0074.
Package Information
SOT23-5
4°
°
±
±
4°
°
0.15 ±
±
0.07
0.45 ±
±
0.15 0.10 BSC
1.20
±
0.25
1.575 ±
±
0.125
2.80 ±
±
0.20
0.40
±
0.10
0.60 REF
2.85
±
0.15
1.90 BSC
0.95
BSC
1.10
±
0.20
10°
°
±
5°
°
GAUGE PLANE
0.075
±
0.075
0.60 REF
All dimensions in millimeters.
1. XYY = assembly and date code.
2. Sample stock is generally held on part numbers listed in BOLD.
11
AAT4610A
DATA SHEET
Current Limited Load Switch
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201917A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 3, 2012
Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved.
Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a
service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. Sky-
works may change its documentation, products, services, specifi cations or product descriptions at any time, without notice. Skyworks makes no commitment to update the materials or information and shall have no
responsibility whatsoever for confl icts, incompatibilities, or other diffi culties arising from any future changes.
No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or information provided here-
under, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of Sale.
THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A PARTICULAR
PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED. SKYWORKS DOES
NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES, IN-
CLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM
THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury, death, physical or en-
vironmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper
use or sale.
Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifi cations as a result of design defects, errors, or operation of products outside of pub-
lished parameters or design specifi cations. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product
design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifi cations or parameters.
Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for
identifi cation purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference.
SC70JW-8
0.225
±
0.075
0.45
±
0.10
0.05
±
0.05
2.10
±
0.30
2.00
±
0.20
7
°
±
3
°
4
°
±
4
°
1.75
±
0.10
0.85
±
0.15
0.15
±
0.05
1.10 MAX
0.100
2.20
±
0.20
0.048REF
0.50 BSC 0.50 BSC 0.50 BSC
All dimensions in millimeters.