ANALOGICTECH AAT4610AIGV-T1

AAT4610A
Current Limited Load Switch
General Description
Features
The AAT4610A SmartSwitch is a current limited Pchannel MOSFET power switch designed for highside 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 current
decreases to less than 1µA.
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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.
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•
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•
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SmartSwitch™
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
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Hot Swap Supplies
Notebook Computers
Peripheral Ports
Personal Communication Devices
UL Recognized Component
Typical Application
INPUT
OUTPUT
IN
AAT4610A
OUT
SOT23-5
ON (ON)
SET
ON/(ON)
GND
1µF
GND
4610A.2007.06.1.4
RSET
0.47µF
GND
1
AAT4610A
Current Limited Load Switch
Pin Descriptions
Pin #
SOT23-5
SC70JW-8
Symbol
Function
1
5
OUT
2
6, 7, 8
GND
3
1
SET
Current limit set input. A resistor from SET to ground sets
the current limit for the switch.
4
2
ON
Enable input. Two versions are available, active-high and
active-low. See Ordering Information for details.
5
3, 4
IN
P-channel MOSFET drain. Connect a 0.47µF capacitor
from OUT to GND.
Ground connection.
P-channel MOSFET source. Connect a 1µF capacitor
from IN to GND.
Pin Configuration
SOT23-5
(Top View)
OUT
2
1
GND
2
SET
3
SC70JW-8
(Top View)
5
4
IN
ON
SET
ON
IN
IN
1
8
2
7
3
6
4
5
GND
GND
GND
OUT
4610A.2007.06.1.4
AAT4610A
Current Limited Load Switch
Absolute Maximum Ratings1
TA = 25°C, unless otherwise noted.
Symbol
Description
VIN
VON
VSET, VOUT
IMAX
TJ
TLEAD
VESD
IN to GND
ON(ON) to GND
SET, OUT to GND
Maximum Continuous Switch Current
Operating Junction Temperature Range
Maximum Soldering Temperature (at Leads)
ESD Rating2 - HBM
Value
Units
-0.3 to 6
-0.3 to VIN + 0.3
-0.3 to VIN + 0.3
2
-40 to 150
300
4000
V
V
V
A
°C
°C
V
Value
Units
150
667
°C/W
mW
Thermal Characteristics3
Symbol
ΘJA
PD
Description
Thermal Resistance (SOT23-5 or SC70JW-8)
Power Dissipation (SOT23-5 or SC70JW-8)
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.
4610A.2007.06.1.4
3
AAT4610A
Current Limited Load Switch
Electrical Characteristics
VIN = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.
Symbol
VIN
IQ
Description
IQ(OFF)
ISD(OFF)
VUVLO
Operation Voltage
Quiescent Current
Off Supply Current
Off Switch Current
Under-Voltage Lockout
RDS(ON)
On Resistance
TCRDS
ILIM
ILIM(MIN)
VON(L)
On Resistance Temperature
Coefficient
Current Limit
Minimum Current Limit
ON (ON) Input Low Voltage
VON(H)
ON (ON) Input High Voltage
ION(SINK)
TRESP
TOFF
TON
ON (ON) Input Leakage
Current Limit Response Time
Turn-Off Time
Turn-On Time
TSD
Over-Temperature Threshold
Conditions
Min
Typ
2.4
VIN = 5V, ON (ON) = Active, IOUT = 0
ON (ON) = Inactive, VIN = 5.5V
ON (ON) = Inactive, VIN = 5.5V, VOUT = 0
Rising Edge, 1% Hysteresis
VIN = 5.0V, TA = 25°C
VIN = 4.5V, TA = 25°C
VIN = 3.0V, TA = 25°C
RSET = 6.8kΩ
VIN = 2.7V to 5.5V1
VIN = 2.7V to < 4.2V1
VIN ≥ 4.2V to 5.0V1
VON = 5.5V
VIN = 5V
VIN = 5V, RL = 10Ω
VIN = 5V, RL = 10Ω
TJ Increasing
VIN = 5V
TJ Decreasing
9
0.01
1.8
145
150
190
2800
0.75
1
130
Max
Units
5.5
25
1
1
2.4
180
V
µA
µA
µA
V
mΩ
230
ppm/°C
1.25
A
mA
0.8
2.0
2.4
V
0.01
0.4
4
12
125
115
1
12
200
µA
µs
µs
µs
°C
1. For VIN outside this range, consult Typical ON (ON) Threshold curve.
4
4610A.2007.06.1.4
AAT4610A
Current Limited Load Switch
Typical Characteristics
Unless otherwise noted, VIN = 5V, TA = 25°C.
Quiescent Current vs. Temperature
Quiescent Current vs. Input Voltage
20
Quiescent Current (µA)
Quiescent Current (µA)
20
15
10
5
0
-40
-20
0
20
40
60
80
100
15
10
5
0
0
120
1
2
Output Current vs. Output Voltage
RDS(ON) (mΩ)
Output Current ( A)
0.6
0.4
0.2
0
2
3
4
5
240
220
200
180
160
140
120
100
80
60
40
20
0
Input = 5V
-40
-20
0
20
40
60
80
100
120
Temperature (°C)
Off-Supply Current vs. Temperature
Off-Switch Current vs. Temperature
10
10
Off-Switch Current (µA)
Off-Supply Current (µA)
6
Input = 3V
Output Voltage (V)
1
0.1
0.01
-40
5
RDS(ON) vs. Temperature
(RSET = 16kΩ)
1
4
Input Voltage (V)
Temperature (°C)
0
3
-20
0
20
40
60
80
Temperature (°C)
4610A.2007.06.1.4
100
120
1
0.1
0.01
0.001
-40
-20
0
20
40
60
80
100
120
Temperature (°C)
5
AAT4610A
Current Limited Load Switch
Typical Characteristics
Unless otherwise noted, VIN = 5V, TA = 25°C.
Turn-On vs. Temperature
Turn-Off vs. Temperature
(RLOAD = 10Ω; CLOAD = 0.47µF)
(RLOAD = 10Ω; CLOAD = 0.47µF)
6
20
VIN = 5V
10
4
VIN = 3V
3
2
1
0
-40
-20
0
20
VIN = 5V
5
VIN = 3V
Turn-Off Time (µs)
Turn-On Time (µS)
30
40
60
80
0
100
-40
-20
0
Turn-Off
(RL = 10Ω; CL = 0.47µF)
6
5
ON
Output
3
2
1
15
20
25
30
35
40
45
Output
2
0
10
50
-10
-5
0
5
10
Time (µs)
12
10
Input Voltage
6
4
4
Output Current
2
2
0
Output Voltage
-2
-4
0.0
0.5
1.0
1.5
Time (µs)
6
8
5
0
-0.5
25
30
35
40
45
50
2.0
2.5
3.0
2.20
Output Current (A)
Input and Output Voltage (V)
8
1
20
V IH and V IL vs. VIN
7
3
15
Time (µs)
Short-Circuit Through 0.3Ω
6
100
1
-1
5
80
3
0
0
ON
4
-1
-5
60
Turn-On
5
-10
40
(RL = 10Ω; CL = 0.47µF)
6
4
20
Temperature (°C)
Voltage (V)
Voltage (V)
Temperature (°C)
2.00
1.80
1.60
1.40
VIH
1.20
VIL
1.00
0.80
2.5
3.0
3.5
4.0
4.5
5.0
5.5
VIN (V)
4610A.2007.06.1.4
AAT4610A
Current Limited Load Switch
Typical Characteristics
Unless otherwise noted, VIN = 5V, TA = 25°C.
RSET vs. ILIM
RSET Coefficient vs. ILIM
10
RSET ILIM Product (kV)
RSET (kΩ)
100
10
1
0.1
9
8
7
6
5
1
10
ILIM (A)
0
0.5
1
1.5
2
ILIM (A)
Current Limit vs. Temperature
Current Limit (%)
6
RSET = 22.1k
V IN - VOUT= 0.5V
4
2
0
-2
-4
-6
-50
- 25
0
25
50
75
100
Temperature (°C)
4610A.2007.06.1.4
7
AAT4610A
Current Limited Load Switch
Functional Block Diagram
IN
OUT
Over-Temperature
Protection
UnderVoltage
Lockout
ON (ON)
1.2V
Reference
SET
Current
Limit
RSET
GND
Ω
Application Information
1.2
Device with high current limit at -40°C
0.88A
1
Setting Current Limit
8
0.8
I LIM (A)
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 operating 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 current limit and a hot device with a statistically lower
current 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.
0.6
0.525A
0.4
Device with low current limit at 85°C
0.2
0
0
1
2
3
4
5
VOUT (V)
Figure 1: Current Limit Using 10.5kΩ.
To determine RSET, start with the maximum current
drawn by the load and multiply it by 1.33 (typical
ILIM = minimum ILIM / 0.75). This is the typical current limit value. Next, refer to "RSET vs. ILIM" and
find the RSET that corresponds 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 calculated using the
4610A.2007.06.1.4
AAT4610A
Current Limited Load Switch
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 the table "Current Limit
RSET Values."
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
Current Limit RSET Values
RSET
(kΩ)
40.2
30.9
24.9
22.1
19.6
17.8
16.2
14.7
13.0
10.5
8.87
7.50
6.81
6.04
5.49
4.99
4.64
Current Device Will Device Always
Limit Not Current Current Limits
Typ
Limit Below
Below
(mA)
(mA)
(mA)
200
250
300
350
400
450
500
550
600
700
800
900
1000
1100
1200
1300
1400
150
188
225
263
300
338
375
413
450
525
600
675
750
825
900
975
1050
250
313
375
438
500
563
625
688
750
875
1000
1125
1250
1375
1500
1625
1750
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, "Overload
Operation." 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 temperature 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
integrated 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
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
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.
1
0.5
0.25
0
5
Output Current
4
3
1Ω load is turned on at time = 0
Output Voltage
2
Output Current (A)
Output Voltage (V)
0.75
1
0
-0.05
0
0.05
0.1
0.15
0.2
0.25
0.3
Figure 2: Overload Operation.
4610A.2007.06.1.4
9
AAT4610A
Current Limited Load Switch
Ordering Information
Package
Marking1
Enable
Part 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
All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means
semiconductor products that are in compliance with current RoHS standards, including
the requirement that lead not exceed 0.1% by weight in homogeneous materials. For more
information, please visit our website at http://www.analogictech.com/pbfree.
Package Information
SOT23-5
2.85 ± 0.15
1.90 BSC
0.40 ± 0.10
0.075 ± 0.075
0.15 ± 0.07
4° ± 4°
10° ± 5°
1.10 ± 0.20
0.60 REF
1.20 ± 0.25
2.80 ± 0.20
1.575 ± 0.125
0.95
BSC
0.60 REF
0.45 ± 0.15
GAUGE PLANE
0.10 BSC
All dimensions in millimeters.
1. XYY = assembly and date code.
2. Sample stock is generally held on part numbers listed in BOLD.
10
4610A.2007.06.1.4
AAT4610A
Current Limited Load Switch
SC70JW-8
2.20 ± 0.20
1.75 ± 0.10
0.50 BSC 0.50 BSC 0.50 BSC
0.225 ± 0.075
2.00 ± 0.20
0.100
7° ± 3°
0.45 ± 0.10
4° ± 4°
0.05 ± 0.05
0.15 ± 0.05
1.10 MAX
0.85 ± 0.15
0.048REF
2.10 ± 0.30
All dimensions in millimeters.
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830 E. Arques Avenue, Sunnyvale, CA 94085
Phone (408) 737-4600
Fax (408) 737-4611
4610A.2007.06.1.4
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