Datasheet AAT4610IGV-T1, AAT4610 Datasheet (Analogic Technologies)

AAT4610

Current Limited Load Switch in SOT-23 Package

General Description

The AAT4610 SmartSwitch™ is a member of
AnalogicTech's Application Specific Power
MOSFET™ (ASPM™) product family. It is a Current
Limited P-channel MOSFET power switch designed
for high-side load-switching applications. This switch
operates with inputs ranging from 2.7V 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 AAT4610 is also pro­tected from thermal overload which limits power dis­sipation and junction temperatures. It can be used
to control loads that require up to 1 A. Current limit
threshold is programmed with a resistor from SET to
ground. The quiescent supply current is typically a
low 15µA max. In shutdown mode, the supply cur­rent decreases to less than 1µA.

The AAT4610 is available in a 5 pin SOT-23 spec­ified over -40 to 85°C.

The AAT4600 Series is a family of adjustable and
fixed SmartSwitch™ with a range of current han­dling capabilities. Available are single versions in
adj. current limit (AAT4600, AAT4601) as well as in
fixed current limit (AAT4602, AAT4625). Dual ver-

sions (AAT4620, AAT4626) are also available.

SmartSwitch

Features

• 2.7V to 5.5V Input voltage range

• Programmable over current threshold

• Fast transient response:

• <1µs response to short circuit

• Low quiescent current

• 15µA typical

• 1µA max with Switch off

• 160mΩ typical R

• Only 2.5V needed for ON/OFF Control

• Undervoltage Lockout

• Thermal shutdown

• Temp range -40 to 85°C

• 4kV ESD Rating

• UL Approved—File No. E217765

• 5 pin SOT-23 package

Applications

• Peripheral ports

• Notebook computers

• Personal communication devices

• Hot swap supplies

DS(ON)

™

Preliminary Information

UL Recognized Component

Typical Application

INPUT

5

IN

AAT4610

1

OUT

SOT-23

ON (ON)

1µF

GND GND

4610.2001.9.0.97 1

4

ON/(ON)

GND

2

SET

3

R

SET

0.47µF

OUTPUT

Pin Configuration

AAT4610

Current Limited Load Switch in SOT-23 Package

5-Pin SOT-23

(Top View)

OUT

GND

SET

1

2

3

5

IN

4

ON

Pin Descriptions

Pin # Symbol Function

1 OUT P-channel MOSFET drain. Connect 0.47µF capacitor from OUT to GND.

2 GND Ground connection

3 SET Current-Limit Set Input. A resistor from SET to ground sets the current limit for

the switch.

4 ON Enable Input. Two versions are available, active-high and active-low. See order-

ing information for details.

5 IN P-channel MOSFET source. Connect 1µF capacitor from IN to GND.

24610.2001.9.0.97

AAT4610

Current Limited Load Switch in SOT-23 Package

Absolute Maximum Ratings (T

=25°C unless otherwise noted)

A

Symbol Description Value Units

V

IN

V

ON

V

SET,VOUT

I

MAX

T

J

T

LEAD

V

ESD

Note: 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.

Note 1: Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.

IN to GND -0.3 to 6 V
ON(ON) to GND -0.3 to VIN+0.3 V
SET, OUT to GND -0.3 to VIN+0.3 V
Maximum Continuous Switch Current 2 A
Operating Junction Temperature Range -40 to 150 °C
Maximum Soldering Temperature (at Leads) 300 °C
ESD Rating1- HBM 4000 V

Thermal Characteristics

Symbol Description Value Units

Θ

JA

P

D

Note 2: Mounted on a demo board.

Thermal Resistance
Power Dissipation

2

2

150 °C/W
667 mW

Electrical Characteristics (V

= 5V, TA= -40 to 85°C unless otherwise noted. Typical values

IN

are at TA=25°C)

Symbol Description Conditions Min Typ Max Units

V

IN

I

Q

I

Q(OFF)

I

SD(OFF)

V

UVLO

R

DS(ON)

I

LIM

I

LIM(MIN)

V

ON(L)

V

ON(H)

I

ON(SINK)

T

RESP

T

OFF

T

ON

Operation Voltage 2.7 5.5 V
Quiescent Current VIN= 5V, ON (ON) = active, I
Off Supply Current ON (ON) =inactive, V

= 5.5V 1 µA

IN

Off Switch Current ON (ON) = inactive, VIN= 5.5V, V

= 0 15 30 µA

OUT

= 0 .03 15

OUT

µA

Undervoltage Lockout Rising edge, 1% hysteresis, 2.0 2.3 2.7 V

V

=5.0V 160 180 mΩ

IN

On-Resistance V

Current Limit R

=4.5V 165 mΩ

IN

V

=3.0V 195 230 mΩ

IN

= 6.8kΩ .75 1 1.25 A

SET

Minimum Current Limit 150 mA
ON (ON) Input Low Voltage 0.8 V

V

=2.7V to 3.6V 2.0 V

ON (ON) Input High Voltage

IN

VIN=4.5V to 5.5V 2.4 V
ON (ON) Input leakage VON= 5.5V 0.01 1 µA
Current Limit Response Time VIN=5V 0.8
Turn-Off Time VIN=5V, R
Turn-On Time VIN=5V, R

=10Ω 0.4 2

L

=10Ω 40 200 µs

L

µs

µs

4610.2001.9.0.97 3

Current Limited Load Switch in SOT-23 Package

Typical Characteristics

(Unless otherwise noted, VIN= 5V, TA= 25°C)

AAT4610

Quiescent Current vs. Temperature

25

20

15

10

5

Quiescent Current (µA)

0

-40 -20 0 20 40 60 80 100 120

Temperature

Output Curr ent vs

0.6

A)
(

0.4

R

=16 kΩ

0.2

Output Current

0

012345

SET

Vout ( V )

V

(C)

OUT

Quiescent Current

40

30

A )

µ

20

Input (

10

0

2.5 3 3.5 4 4.5 5 5.5

Input ( V )

R

250

Input = 3V

200

150

(mΩ)

100

DS(ON)

R

50

0

-40 -2 0 0 20 40 60 80 100

vs. Temperature

DS(ON)

Te

mperatur e (C)

Input = 5V

Off-Supply Current vs. Temperature

10

1

0.1

Off-Supply Current (µA)

0.01

-40 -20 0 20 40 60 80 100 120

Temperature (C)

Off-Switch Current vs. Temperature

10

1

0.1

0.01

Off-Switch Current (µA)

0.001

-40 -20 0 20 40 60 80 100 120

Temperature (C)

44610.2001.9.0.97

Current Limited Load Switch in SOT-23 Package

(Unless otherwise noted, VIN= 5V, TA= 25°C)

AAT4610

Turn-ON vs. Temperature

80

70

60

50

40

30

Vin=5V

20

Turn-ON Time (µs)

10

0

-40 -20 0 20 40 60 80 100

Vin=3V

Temperatur e ( C )

Turn-On

= 10Ω, CL = 0.47µF

R

L

6

5

4

3

2

1

Voltage ( V )

0

-1

- 20 0 20 40 60

I

OUT=ILIM IT

Time (µs)

OutputON

Turn-OFF vs. Temperature

0.45

0.4

0.35

0.3

0.25

0.2

0.15

0.1

Turn-OFF Time (µs)

0.05

0

Vin = 3V

Vin = 5V

- 40 - 20 0 20 40 60 80 100

Temperature (C)

Turn-Off

= 10Ω

R

L

6

5

4

3

2

1

Voltage ( V )

0

-1

- 0.5 0 0.5 1

Time (µs)

I

OUT=ILIM IT

OutputON

Short Circuit through 0.3Ω

8

(V)

6

4

2

Input and Output

0

0123

Input Voltage

Output Current

Output Voltage

Time (µs)

12

8

4

0

-4

Output (A)

8

(V)

6

4

2

Input and Output

0

0123

Short Circuit through 0.6Ω

Input Voltage

Output Current

Output Voltage

Time (µs)

9

6

3

0

-3

4610.2001.9.0.97 5

Output (A)

Current Limited Load Switch in SOT-23 Package

(Unless otherwise noted, VIN= 5V, TA= 25°C)

R

vs I

SET

LIM

R

coefficent vs I

SET

AAT4610

LIM

100

)

Ω

(k

10

SET

R

1

0.1 101

I

(A)

LIM

Current Limit v. Temperature

6%

4%

2%

0%

-2%

-4%

Current Limit (%)

-6%

-50 - 25 0 25 50 75 100

Temperatur e (C)

R

SET

V

IN-VOUT

= 22.1k

=0.5V

10

9

8

Product ( kV )

7

LIM

I

6

SET

R

5

0 0.5 1 1.5 2

I

(A)

LIM

64610.2001.9.0.97

Functional Block Diagram

AAT4610

Current Limited Load Switch in SOT-23 Package

IN

ON (ON)

Under-

voltage

Lockout

Over-Temp

1.2V

Reference

GND

Protection

Current

Limit

OUT

SET

R

SET

4610.2001.9.0.97 7

AAT4610

Current Limited Load Switch in SOT-23 Package

Applications Information

Setting Current Limit

In most applications, the variation in I
taken into account when determining R
variation is due to processing variations from part
to part, as well as variations in the voltages at IN
(pin 5) and OUT (pin 3), plus the operating temper­ature. See charts "Current Limit vs. Temperature",
and "Output Current vs. V

". Together these

OUT

three factors add up to a ±25% tolerance (see I
specification in Electrical Characteristics section).
In the figure below, a cold device with a statistical­ly higher current limit, and a hot device with a sta­tistically lower current limit, both with R

10.5kΩ are shown. While the chart, "R

indicates an I

of 0.7A with an R

LIM

this figure shows that the actual current limit will be
at least 0.525A, and no greater than 0.880A.

Current Limit Using10.5 k

1.2

0.88 A

1

0.8

(A)

0.6

LIM

I

0.525 A

0.4

0.2

Device with high current limit at -40 C

Device with low current limit at 85 C

Ω

LIM

SET.

SET

SET

of 10.5kΩ ,

SET

must be

The I

LIM

LIM

equal to

vs. I

LIM

that is less than or equal to it. For greater precision,
the value of R
I

LIMRSET

cient vs. I

product found in the chart "R

LIM

multiplying the typical current for the chosen R

may also be calculated using the

SET

SET

coeffi-

". The maximum current is derived by

SET

in the chart by 1.25. A few standard resistor values
are listed in the table "Current Limit R

Current Limit R

R

SET

Current Device will Device always

SET

Values

SET

Values".

(kΩ ) Limit typ not current current limits

(mA) limit below: below:

(mA) (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

0

012345

Vout ( V )

To determine R

start with the maximum current

SET,

drawn by the load, and multiply it by 1.33. (typi­cal_I
current limit value. Next, refer to "R
find the R

= minimum_I

LIM

SET

/ 0.75) This is the typical

LIM

SET

vs. I

LIM

" and

that corresponds to the typical current

limit value. Choose the largest resistor available

Example: A USB port requires 0.5A. 0.5A multiplied
by 1.33 is 0.665A. From the chart named "R
I

LIM

", R

should be less than 11kΩ. 10.5 kΩ is a

SET

SET

vs.

standard value that is a little less than 11kΩ but

very close. The chart reads approximately 0.700A
as a typical I

value for 10.5kΩ . Multiplying

LIM

0.700A by 0.75 and 1.25 shows that the AAT4610
will limit the load current to greater than 0.525A but
less than 0.875A.

84610.2001.9.0.97

Current Limited Load Switch in SOT-23 Package

Overload Operation

1

0.75

0.5

0.25

0

5

4

Output ( V )

3

2

1

0

-0.050 0.050.10.150.20.250.3

1Ω load is turned on at time = 0

Tim e ( s )

Outp ut Curre nt

Outp ut Volta ge

AAT4610

Output (A)

Operation in Current Limit

When a heavy load is applied to the output of the
AAT4610, the load current is limited to the value of
I

determined by R

LIM

Operation". Since the load is demanding more cur­rent than I

, the voltage at the output drops. This

LIM

causes the AAT4610 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 AAT4610 will shut down
until is has cooled sufficiently, at which point it will
startup again. The AAT4610 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
(pin 4).

. See the figure "Overload

SET

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 (pin 4)
of the AAT4610 has low and high threshold volt­ages that accommodate this condition. The thresh­old voltages are compatible with 5 volt TTL, and 2.5
volt to 5 volt CMOS.

Reverse Voltage

The AAT4610 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 AAT4610.

4610.2001.9.0.97 9

Ordering Information

c

AAT4610

Current Limited Load Switch in SOT-23 Package

Package Enable Marking

SOT-23-5 ON (active low) N/A AAT4610IGV-T1

SOT-23-5 ON (active high) N/A AAT4610IGV-1-T1

Package Information

SOT-23-5

e

S1

H

E

D

A

A1

S

b

Part Number

Bulk Tape and Reel

Dim

Millimeters Inches

Min Max Min Max

A 0.95 1.45 0.037 0.057
A1 0.05 0.15 0.002 0.006
A2 0.90 1.30 0.035 0.051

b 0.35 0.50 0.014 0.019

c 0.08 0.20 0.003 0.078
D 2.84 3.00 0.112 0.112
E 1.50 1.70 0.059 0.067

e 1.90 0.0748
H 2.60 3.00 0.102 0.118

L 0.35 0.55 .0137 .0216
S 0.47 0.55 0.019 .0216

S1 .95 0.037

L

Θ 0° 10° 0° 10°

Advanced Analogic Technologies, Inc.

1250 Oakmead Parkway, Suite 310, Sunnyvale, CA 94086
Phone [phone]
Fax [phone]

104610.2001.9.0.97