ANALOGICTECH AAT4291IJS-1-T1

AAT4290/4291
I/O Expander Load Switches with Serial Control
General Description
Features
The AAT4290 and AAT4291 SmartSwitch™ products are members of AnalogicTech’s Application
Specific Power MOSFET™ (ASPM™) product
family. The AAT4290 and AAT4291 are five and
three P-channel MOSFETs, respectively, configured for use as a microprocessor I/O expander.
Having independent drain outputs and a common
source input, they operate with an input voltage
ranging from 1.8V to 5.5V, making them ideal for
2.5V, 3.3V, or 5V systems, as well as systems powered by lithium-ion/polymer batteries. Each switch
features a 500ns turn-on time. The switch states
are controlled by a Simple Serial Control™
(S2Cwire™) interface which permits ease of control
and efficiency of size. The quiescent supply current is very low, typically 5µA. In shutdown mode,
the supply current is reduced to less than 1µA.
•
•
•
•
•
•
•
•
SmartSwitch™
1.8V to 5.5V Input Voltage Range
5 or 3 Independent Load Switches
Optional 200µS Slew Rate Control
S2Cwire Interface
1.1Ω RDS(ON) Per Switch
Low Quiescent Current
— 5µA
— 0.1µA in Shutdown
-40°C to +85°C Temperature Range
8-Pin SC70JW Package
Applications
•
•
•
•
•
The AAT4290 and AAT4291 are offered in an 8 pin
SC70JW package specified over the -40°C to
+85°C temperature range.
Cell Phones
I/O Expansion
Multiple Low Power Switching
Personal Communication Devices
Portable Electronic Devices
Typical Application
INPUT
IN
AAT4290
EN/SET
EN/SET
OUT1
OUT1
OUT2
OUT2
OUT3
OUT3
OUT4
OUT4
OUT5
OUT5
GND
CIN
1µF
GND
4290.2005.01.1.0
COUT1
0.1µF
COUT2
0.1µF
COUT3
0.1µF
COUT4
0.1µF
COUT5
0.1µF
GND
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AAT4290/4291
I/O Expander Load Switches with Serial Control
Pin Descriptions
Pin #
AAT4290
AAT4291
Symbol
Function
1
1
IN
2
7
OUT2
P-channel MOSFET drain.
3
6
OUT1
P-channel MOSFET drain.
4
4
EN/SET
5
5
GND
Ground connection.
6
N/A
OUT5
P-channel MOSFET drain.
7
N/A
OUT4
P-channel MOSFET drain.
8
8
OUT3
P-channel MOSFET drain.
Input power supply is connected to the P-channel MOSFETs
sources. Connect a 1µF capacitor from IN to GND.
Input control pin using S2Cwire serial interface. The device
records rising edges of the clock and decodes them into 32
states (8 states for AAT4291) which controls the ON/OFF
states of the MOSFETs. See Table 1 and Table 2 for output settings.
Pin Configuration
AAT4290
(SC70JW-8)
IN
OUT2
OUT1
EN/SET
2
1
8
2
7
3
6
4
5
AAT4291
(SC70JW-8)
OUT3
OUT4
OUT5
GND
IN
N/C
N/C
EN/SET
1
8
2
7
3
6
4
5
OUT3
OUT2
OUT1
GND
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AAT4290/4291
I/O Expander Load Switches with Serial Control
Absolute Maximum Ratings1
Symbol
Description
VIN
VOUT
VEN/SET
IMAX
TSTORAGE
VESD
IN to GND
OUT to GND
EN/SET to GND
Maximum Continuous Switch Current
Storage Temperature Range
ESD Rating - HBM 2
Value
Units
-0.3 to 6.0
-0.3 to VIN + 0.3
-0.3 to 6.0
250
-65 to 150
4000
V
V
V
mA
°C
V
Notes:
1: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional conditions 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 to each pin.
Thermal Characteristics
Symbol
θJA
PD
Description
3
Thermal Resistance
Maximum Power Dissipation (TA = 25°C)
4
Value
Units
225
440
°C/W
mW
Note 3: Mounted on the board.
Note 4: Derate 4.4mW/°C above 25°C.
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AAT4290/4291
I/O Expander Load Switches with Serial Control
Electrical Characteristics
VIN = 5.0V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C.
Symbol
VIN
IQ
IQ(OFF)
ISD(OFF)
VUVLO
VUVLO(hys)
RDS(ON)
TCRDS
Description
Operation Voltage
Quiescent Current
Off Supply Current
Off Switch Current
Under-Voltage Lockout
Under-Voltage Lockout Hysteresis
On-Resistance
Conditions
Min
Typ Max
1.8
VIN = 5.5V, EN/SET = VIN, IOUT = 0,
All Switches ON
EN/SET = 0, VIN = 5.5V, VOUT Open
EN/SET = 0, VIN = 5.5V, VOUTn = 0
VIN Falling
VIN
VIN
VIN
VIN
=
=
=
=
1.8V, TA
3.0V, TA
4.2V, TA
5.0V, TA
=
=
=
=
4.5
0.1
1.2
250
2.5
1.5
1.2
1.1
2800
25°C
25°C
25°C
25°C
On-Resistance Temperature
Coefficient
Units
5.5
8
V
µA
1
1
µA
µA
V
mV
3.8
2.2
1.8
1.7
Ω
ppm°C
AAT4290-1 and AAT4291-1
TD(ON)
TR
TD(OFF)
Output Turn-On Delay
Turn-On Rise Time
Turn-Off Delay Time
VIN = 5V, RLOAD = 500Ω, COUT = 0.1µF
VIN = 5V, RLOAD = 500Ω, COUT = 0.1µF
VIN = 5V, RLOAD = 500Ω
40
270
40
ns
ns
ns
Output Turn-On Delay
Turn-On Rise Time
Turn-Off Delay Time
VIN = 5V, RLOAD = 500Ω, COUT = 0.1µF
VIN = 5V, RLOAD = 500Ω, COUT = 0.1µF
VIN = 5V, RLOAD = 500Ω
50
200
40
µs
µs
ns
Enable Threshold Low
Enable Threshold High
EN/SET Low Time
VIN = 1.8V
VIN = 5.5V
VEN/SET < 0.4V
VIN ≤ 2.5V
VIN > 2.5V
AAT4290-2 and AAT4291-2
TD(ON)
TR
TD(OFF)
EN/SET
VEN(L)
VEN(H)
TLO
THI
TO
TLAT
ISINK
Minimum EN/SET High Time
EN/SET Off Timeout
EN/SET Latch Timeout
EN/SET Input Leakage
VEN/SET = 5.5V
0.4
1.6
100
2.6
2.6
0.01
500
250
4.0
4.0
1
V
V
ns
ns
µs
µs
µA
Note 1: The AAT4290 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is
assured by design, characterization, and correlation with statistical process controls.
4
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AAT4290/4291
I/O Expander Load Switches with Serial Control
Typical Characteristics
Unless otherwise noted, VIN = 5V, CIN = 1µF, COUTX = 0.1µF, TA = 25°C.
Quiescent Current vs. Temperature
Quiescent Current vs. Input Voltage
6
5.5
5.5
5
VIN=5.0V
5
4.5
4
IQ (µA)
IQ (µA)
4.5
4
3.5
3.5
3
VIN=3.3V
3
2.5
2.5
2
2
1.5
-40
-20
0
20
40
60
80
100
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Temperature (°C)
VIH and VIL vs. Input Voltage
RDS(ON) vs. Input Voltage
2.7
1.4
IO1-5 = 100mA
2.5
1.3
VIH
1.2
2.3
RDS(ON) (Ω)
VIH and VIL (V)
2.1
1.1
1
0.9
VIL
0.8
RDS5
1.9
RDS1
1.7
RDS2
1.5
1.3
1.1
RDS3
0.7
0.9
0.6
1.5
0.5
1.5
2
2.5
3
3.5
4
4.5
5
2.0
2.5
5.5
RDS(ON) vs. Temperature
1.3
RDS2
RDS1
RDS5
0.9
RDS4
RDS3
0.8
5.0
5.5
0
20
RDS2
RDS1
1.1
RDS5
1.0
RDS4
0.9
RDS3
0.8
0.7
40
Temperature (°C)
4290.2005.01.1.0
4.5
VIN = 5.0V
IO1-5 = 100mA
1.2
RDS(ON) (Ω)
RDS(ON) (Ω)
1.1
-20
4.0
1.4
VIN = 5.0V
IO1-5 = 50mA
-40
3.5
RDS(ON) vs. Temperature
1.3
1
3.0
Input Voltage (V)
Input Voltage (V)
1.2
RDS4
0.7
60
80
100
0.7
-40
-20
0
20
40
60
80
100
Temperature (°C)
5
AAT4290/4291
I/O Expander Load Switches with Serial Control
Typical Characteristics
Unless otherwise noted, VIN = 5V, CIN = 1µF, COUTX = 0.1µF, TA = 25°C.
EN/SET Off Timeout vs. Temperature
3.4
3.4
3.2
3.2
Off Timeout, tO (µs)
Latch timeout, tLAT (µs)
EN/SET Latch Timeout vs. Temperature
3
2.8
VIN = 3.3V
2.6
VIN = 5.0V
3
2.6
2.4
2.4
2.2
2.2
-40
-20
0
20
40
60
80
100
VIN = 3.3V
2.8
VIN = 5.0V
-40
-20
0
20
40
60
80
100
Temperature (°C)
Temperature (°C)
Turn-On Characteristic
EN/SET Timeout vs. Input Voltage
(VIN = 5V, RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF)
4.3
4.1
Timeout (µs)
3.9
VO2
(5V/div)
3.7
3.5
3.3
VO1
(5V/div)
Off timeout tO
3.1
2.9
2.7
EN/SET
(5V/div)
Latch timeout tLAT
2.5
1.5
2
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Turn-On Characteristic
Turn-On Characteristic
(VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF)
(VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF)
VO2
(5V/div)
VO2
(5V/div)
VO1
(5V/div)
VO1
(5V/div)
EN/SET
(5V/div)
EN/SET
(5V/div)
Time (2µs/div)
6
Time (2µs/div)
Time (2µs/div)
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AAT4290/4291
I/O Expander Load Switches with Serial Control
Typical Characteristics
Unless otherwise noted, VIN = 5V, CIN = 1µF, COUTX = 0.1µF, TA = 25°C.
Turn-On Characteristic
Turn-Off Characteristic
(VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF)
(VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF)
VO2
(5V/div)
VO2
(5V/div)
VO1
(5V/div)
VO1
(5V/div)
EN/SET
(5V/div)
EN/SET
(5V/div)
Time (2µs/div)
Time (2µs/div)
Transition of Outputs
Turn-On Transient Characteristic
(VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF)
(VIN = 5V; RL1 = RL2 = 50Ω)
VO2
(100mV/div,
AC coupled)
VO2
(5V/div)
VO1
(5V/div)
VO1
(5V/div)
EN/SET
(5V/div)
EN/SET
(5V/div)
Time (2µs/div)
4290.2005.01.1.0
Time (5µs/div)
7
AAT4290/4291
I/O Expander Load Switches with Serial Control
Functional Block Diagram
OUT1
IN
OUT2
OUT3
OUT4*
OUT5*
UVLO
Control Logic
and Level Shift
ROM
EN/SET
S2Cwire Interface
GND
Functional Description
The AAT4290 consists of five P-channel MOSFET
power switches designed for I/O expansion applications. The AAT4291 has all of the features
offered in the AAT4290, but integrates three
switches instead of five. It operates with input voltages ranging from 1.8V to 5.5V which, along with
its extremely low operating current, makes it ideal
for battery-powered applications. In cases where
the input voltage drops below 1.8V, the AAT4290
MOSFETs are protected from entering the linear
region of operation by automatically shutting down.
In addition, the TTL-compatible EN/SET pin makes
the AAT4290 an ideal level-shifted load switch. An
optional slew rate controlling feature eliminates inrush current when a MOSFET is turned on, allowing the AAT4290 to be implemented with a small
input capacitor or no capacitor at all, while maintaining isolation between channels. During slewing, the current ramps linearly until it reaches the
level required for the output load condition. The
proprietary control method works by careful control
8
*AAT4290 only
and monitoring of the MOSFET gate voltage.
When the device is switched ON, the gate voltage
is quickly increased to the threshold level of the
MOSFET. Once at this level, the current begins to
slew as the gate voltage is slowly increased until
the MOSFET becomes fully enhanced. Once it
has reached this point, the gate is quickly
increased to the full input voltage and RDS(ON) is
minimized.
The ON/OFF state of the five MOSFET switches
are controlled by the EN/SET serial data input. An
internal control counter is clocked on the rising
edge of the EN/SET pin, and is decoded into the 32
possible states of the MOSFET (see Table 1). The
counter rolls over after 32 clocks and the table
repeats. The counter can be clocked at speeds up
to 1MHz, but the count value is not latched until
clocking has stopped and the EN/SET pin has
remained high for approximately 2.6µs. The first
rising edge of EN/SET enables the AAT4290 and is
counted as the first clock. To change states, additional low going clock pulses may be asserted on
the EN/SET pin with the resulting change taking
4290.2005.01.1.0
AAT4290/4291
I/O Expander Load Switches with Serial Control
effect after the EN/SET pin has remained in a high
state for TLAT. The AAT4290 is disabled after the
EN/SET pin has transitioned and remained in a
logic low state for TO.
Table 1: AAT4290 Output Settings.
Clock OUT5 OUT4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
4290.2005.01.1.0
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
on
on
on
on
on
on
on
on
off
off
off
off
off
off
off
off
OUT3
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
OUT2 OUT1
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
With the exception of three channel power switches, the AAT4291 has a similar function to the
AAT4290. The ON/OFF state of the three MOSFET switches are controlled by the EN/SET serial
data input. An internal control counter is clocked
on the rising edge of the EN/SET pin, and is
decoded into the eight possible states of the MOSFET (see Table 2). The counter rolls over after
eight clocks and the table repeats.
Table 2: AAT4291 Output Settings.
Clock
OUT3
OUT2
OUT1
1
2
3
4
5
6
7
8
on
on
on
on
off
off
off
off
on
on
off
off
on
on
off
off
on
off
on
off
on
off
on
off
Applications Information
Thermal Considerations
The AAT4290 is designed to deliver continuous
output load currents. Due to its high level of integration, care must be taken in designing for higher
load conditions. If greater loads are required, outputs can be tied together to deliver higher power to
a given load.
At 25°C ambient, the AAT4290 is capable of dissipating 440mW of power, or 1.14A at 5.0V, for an
average current of 228mA per output.
At 85°C ambient, the AAT4290 is capable of dissipating 178mW of power, or 0.72A at 5.0V, for an
average current of 145mA per output.
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AAT4290/4291
I/O Expander Load Switches with Serial Control
Timing Diagram
OUTn
THI
TLO
TLAT
TD(ON) TR
TO
TD(OFF)
EN/SET
Output Sequencing
If output sequencing is not necessary, then all of the
outputs will be switched on simultaneously on the
first rising edge of the EN/SET pin. However, if output sequencing is desired, then a series of pulses
on the EN/SET pin will accomplish this. Each time
a new group of pulses is asserted on EN/SET, the
AAT4290/1 internal control is reset. For example, to
10
sequence the outputs in order from OUT5 to OUT1,
five clocks bursts are input on the EN/SET pin.
From Table 1, the first burst of 16 clocks turns on
OUT5. A following burst of 8 clocks (as the counter
resets) will add OUT4, followed by 4 clocks to add
OUT3, 2 clocks to add OUT2, and 1 clock to add
OUT1. Likewise, the outputs can be turned off in
any order by adding more clock bursts.
4290.2005.01.1.0
AAT4290/4291
I/O Expander Load Switches with Serial Control
Applications Circuits
VSUPPLY
1.8 to 5.5V
AAT4290
IN
GPIO 1
EN/SET
OUT1
EN 1
OUT2
Function 1
OUT3
System
µController
OUT4
EN 2
OUT5
GPIO 2
GPIO 2
to
GPIO 5
are now free for
other uses
GPIO 3
GPIO 4
GPIO 5
EN 3
EN 4
EN 5
Function 2
Function 3
Function 4
Function 5
Figure 1: GPIO I/O Expander
(condense five GPIO control lines to one).
VBATTERY
AAT3110IJS-5.0
SC70JW8: 2x2mm
AAT4291IJS
SC70JW8: 2x2mm
VIN
IN
VOUT
OUT1
OUT2
10µF
C+
10µF
OUT3
R/G/B LED
R
1µF
ON/OFF
SHDN
CGND
G
B
EN/SET
GND
RR
CLOCK
RG
RB
Figure 2: RGB LED Control
(eliminates three discrete MOSFET switches).
4290.2005.01.1.0
11
AAT4290/4291
I/O Expander Load Switches with Serial Control
Ordering Information
Package
Marking1
Part Number (Tape and Reel)
SC70JW-8
HSXYY
AAT4290IJS-1-T1
SC70JW-8
HCXYY
AAT4291IJS-1-T1
Note: Sample stock is generally held on part numbers listed in BOLD.
Note 1: XYY = assembly and date code.
Package Information
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
AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work
rights, or other intellectual property rights are implied.
AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice, and advise customers to obtain the latest
version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale
supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability.
AnalogicTech warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with AnalogicTech’s standard warranty. Testing and
other quality control techniques are utilized to the extent AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed.
Advanced Analogic Technologies, Inc.
830 E. Arques Avenue, Sunnyvale, CA 94085
Phone (408) 737-4600
Fax (408) 737-4611
12
4290.2005.01.1.0