DATA SHEET
AAT3522/3524
MicroPower
TM
Microprocessor Reset Circuit
General Description
The AAT352x series of PowerManager products is part of
Skyworks' Total Power Management IC (TPMIC™) prod-
uct family. These microprocessor reset circuits are ideal
for monitoring voltage supplies in portable systems,
where extended battery life is critical. They provide a
low-cost, reliable solution by eliminating the need for
external components. The AAT352x series operates by
monitoring the system power supply voltage. When the
input voltage drops below a fixed threshold, the device
asserts a reset signal for a fixed time period after V
CC
has
risen back above the fixed threshold; 30ms and 150ms
minimum periods are available. The AAT352x product
series is guaranteed to operate down to 1.2V and is
designed to ignore fast line transients appearing on V
CC
.
The AAT352x series is available with two output stage
versions: AAT3522 push-pull active low output; and
AAT3524 open drain active low output. The quiescent
supply current is extremely low, typically 1µA, making it
ideal for portable battery-operated equipment.
The AAT3522/3524 are available in a Pb-free, 3-pin
SOT23 package and are specified over the -40°C to
+85°C operating temperature range.
Features
•
•
•
•
•
•
•
Input Voltage Range: 1.2V to 5.5V
Operation Down to 1.2V
Extremely Low Quiescent Current: <2µA
High Accuracy Detection Threshold: ±1.5%
Monitor Power Supply Voltages
Fixed Thresholds from 2.2V to 4.6V
-Reset Pulse Width Options
▪
Minimum 30ms or 150ms or 300ms
▪
Fast Propagation Delay <20µs
Available Output Configurations:
▪
Open-Drain Output
▪
CMOS Active High Output
▪
CMOS Active Low Output
Temperature Range: -40°C to +85°C
3-Pin SOT23 Package
4kV ESD Rating
•
•
•
•
Applications
•
•
•
•
•
Cell Phones
Embedded Systems
Intelligent Instruments
Notebook Computers
Portable Electronics
Typical Application
V
CC
VCC
AAT3522
AAT3524
RESET
(RESET)
*
100kΩ
(nominal)
VCC
RESET
µP
INPUT
GND
GND
*AAT3524 Only
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202244B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 30, 2012
1
DATA SHEET
AAT3522/3524
MicroPower
TM
Microprocessor Reset Circuit
Pin Descriptions
Pin #
1
2
3
Symbol
GND
RESET
(AAT3522,
AAT3524)
VCC
Function
Ground connection.
RESET output remains low while V
CC
is below the reset threshold and remains so for a fixed time period
after V
CC
raises above the reset threshold.
Supply voltage (+1.2V to +5.5V). Due to extremely low operating current, place a 10nF capacitor
between VCC and GND.
Part Number Descriptions
Part Number
AAT3522
AAT3524
Part Description
Reset Output Push Pull Active Low with Delay
Reset Output Open Drain Active Low with Delay
Pin Configuration
SOT23-3
(Top View)
GND
1
3
VCC
(RESET) RESET
2
2
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202244B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 30, 2012
DATA SHEET
AAT3522/3524
MicroPower
TM
Microprocessor Reset Circuit
Absolute Maximum Ratings
1
T
A
= 25°C, unless otherwise noted.
Symbol
V
CC
V
RESET
I
MAX
I
RESET
dV
CC
/d
t
T
J
T
LEAD
Description
V
CC
to GND
RESET to GND (Push-Pull Output)
RESET to GND (Open Drain Output)
Maximum Continuous Input Current
RESET/RESET Current
Rate of Rise of V
CC
Operating Junction Temperature Range
Maximum Soldering Temperature (at Leads, 10 sec.)
Value
-0.3 to 5.5
-0.3 to V
CC
+ 0.3
-0.3 to 5.5
20
20
100
-40 to 150
300
Units
V
V
mA
mA
V/µs
°C
°C
Thermal Information
2
Symbol
Q
JA
P
D
Description
Maximum Thermal Resistance
Maximum Power Dissipation
Value
200
320
Units
°C/W
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. Mounted on an FR4 board.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202244B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 30, 2012
3
DATA SHEET
AAT3522/3524
MicroPower
TM
Microprocessor Reset Circuit
Electrical Characteristics
V
IN
= 5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= 25°C; V
CC
= 5V for 4.63/4.38V ver-
sions; V
CC
= 3.3V for 3.08/2.93V versions; V
CC
= 3.0V for 2.63V version; V
CC
= 2.5V for 2.32/2.2V versions.
Symbol
V
CC
I
Q
V
TH
DV
TH
/°C
t
P
t
RDY
Description
Operation Voltage
Quiescent Current
RESET Threshold (Table 1)
RESET Threshold
Temperature Coefficient
RESET Propagation Delay
RESET Active Timeout
Period
RESET Low Output Voltage
AAT3522, AAT3524
RESET High Output Voltage
AAT3522
RESET Leakage Current
AAT3524
Conditions
T
A
= 0ºC to +70ºC
T
A
= -40ºC to +85ºC
V
CC
= 5.5V
V
CC
= 3V
T
A
= 25ºC
T
A
= -40ºC to +85ºC
Min
1.0
1.2
Typ
Max
5.5
5.5
3
2
+ 1.5%
+ 2.5%
Units
V
µA
V
ppm/°C
µs
V
TH
- 1.5%
V
TH
- 2.5%
1.05
0.85
V
TH
V
TH
40
V
TH
V
TH
V
OL
V
OH
I
DOFF
V
CC
= V
TH
to (V
TH
- 100mV)
-50 Option
-200 Option
-400 Option
I
SINK
= 1.2mA, V
CC
= V
TH(min)
, V
TH
≤ 3.08V,
RESET Asserted
I
SINK
= 3.2mA, V
CC
= V
TH(min)
, V
TH
>
3.08V,
RESET Asserted
I
SOURCE
= 800µA, V
TH
>
3.08V, V
CC
> V
TH (max)
I
SOURCE
= 500µA, V
TH
≤ 3.08V, V
CC
> V
TH (max)
V
CC
> V
TH
30
150
300
15
50
250
500
100
400
800
0.3
ms
V
0.4
V
CC
-1.5
0.8 V
CC
1
V
µA
4
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202244B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 30, 2012
DATA SHEET
AAT3522/3524
MicroPower
TM
Microprocessor Reset Circuit
Typical Characteristics
Supply Current vs. Temperature
1.40
Normalized Reset Threshold
vs. Temperature
1.003
Supply Current (µA)
Normalized Threshold
40
60
80
1.20
1.00
0.80
V
CC
= 5V
1.002
1.001
1.000
0.999
0.998
0.997
-40
-20
0
20
40
60
80
V
CC
= 3V
0.60
0.40
0.20
0.00
-40
-20
0
20
Temperature (°C)
Temperature (°C)
Normalized Power-Up Reset Timeout
vs. Temperature
Reset Propagation Delay (µs)
30
25
20
15
10
5
0
-40
Power-Down Reset Propagation
Delay vs. Temperature
Normalized Power-Up
Reset Timeout (ms)
1.5
1.4
1.3
1.2
1.1
1
0.9
0.8
0.7
0.6
0.5
V
OD
= 10mV
V
OD
= 100mV
-40
-20
0
20
40
60
80
100
Temperature (°C)
-20
0
20
40
60
80
Temperature (°C)
Maximum Transient Duration
vs. Reset Threshold Overdrive
400
Maximum Transient
Duration (µs)
350
300
250
200
150
100
50
0
1
10
100
1000
Reset Threshold Overdrive, V
TH
- V
CC
(mV)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202244B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 30, 2012
5
