AAT3526/7/8
MicroPower Supervisory Circuit with Manual Reset
General Description
The AAT3526/7/8 PowerManager™ products are
members of AATI's Total Power Management IC™
(TPMIC™) product family. These microprocessor
reset circuits are ideal for monitoring voltage sup-
plies in portable systems, where extended battery
life is critical. They provide a low cost, reliable solu-
tion by eliminating external components. The
AAT3526/7/8 products operate by monitoring the
system power supply voltage. When the input volt-
age drops below a fixed threshold, the device
asserts a reset signal for a minimum of 150ms after
V
CC
has risen back above the fixed threshold. They
are guaranteed to operate down to 1.2V and
designed to ignore fast line transients appearing on
V
CC
. The AAT3526/7/8 series is available with three
output stage versions: AAT3526 push-pull active
low output, AAT3527 push-pull active high output
and AAT3528 open drain active low output. The
quiescent supply current is extremely low, typically
1µA, making this device ideal for portable battery
operated equipment.
The AAT3526/7/8 are available in a 4 pin SOT143
package and are specified over -40° to 85°C oper-
ating temperature range.
Features
•
•
•
•
•
•
•
•
•
PowerManager
™
•
•
1.2V to 5.5V Input voltage range
Operation down to 1.2V
Extremely low quiescent current: less than 2µA
High accuracy detection threshold: ±1.5%
Monitor Power Supply Voltages
Fixed thresholds from 2.2V to 4.6V
Minimum 150ms reset pulse width with fast
delay time <20µs
Debounced Manual Reset Input
Available output configurations:
• Open-drain output
• CMOS active high output
• CMOS active low output
Temp range -40 to 85°C
4 pin SOT143 package
Advanced Information
Applications
•
•
•
•
•
Notebook Computers
Cell Phones
Portable Electronics
Embedded Systems
Intelligent Instruments
Typical Application
V
CC
V
CC
*
100k
(nominal)
V
CC
MR
AAT3526
AAT3527
RESET
(RESET)
AAT3528
RESET
uP
INPUT
GND
GND
*AAT3528 Only
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AAT3526/7/8
MicroPower Supervisory Circuit with Manual Reset
Pin Descriptions
AAT3526, 3527, 3528 (SOT143)
Pin #
1
Symbol
GND
RESET
(AAT3527)
Function
Ground connection
RESET output remains high while V
CC
is below the reset threshold
and remains so for a minimum of 150ms after V
CC
raises above the
reset threshold.
RESET output remains low while V
CC
is below the reset threshold
and remains so for a minimum of 150ms after V
CC
raises above the
reset threshold
Manual Reset active low input. A logic low signal on MR asserts a
reset condition. Asserted reset continues as long as MR is low and
for a minimum of 150ms after MR returns high
Supply Voltage (+1.2V to +5.5V)
2
RESET
(AAT3526,
AAT3528)
3
MR
4
Vcc
Part Number Descriptions
Part Number
AAT3526
AAT3527
AAT3528
Output Type
Reset Output Push Pull Active Low with Delay
Reset Output Push Pull Active High with Delay
Reset Output Open Drain Active Low with Delay
Pin Configuration
SOT143
(Top View)
GND
(RESET) RESET
1
4
V
CC
MR
2
3
2
3526.2002.1.0.62
AAT3526/7/8
MicroPower Supervisory Circuit with Manual Reset
Absolute Maximum Ratings
Symbol
V
CC
V
MR
V
RESET
I
VCC
, I
MR
I
RESET
dVcc/dt
T
J
T
LEAD
(T
A
=25°C unless otherwise noted)
Description
V
CC
to GND
MR 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) for 10s
Value
-0.3 to 5.5
-0.3 to V
CC
+0.3
-0.3 to V
CC
+0.3
-0.3 to 5.5
20
20
100
-40 to 150
300
Units
V
V
V
mA
mA
V/µs
°C
°C
Note: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at con-
ditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any one time.
Thermal Information
Symbol
Θ
JA
P
D
Description
Maximum Thermal Resistance (SOT143)
1
Maximum Power Dissipation (SOT143)
1
Value
200
320
Units
°C/W
mW
Note 1: Mounted on an FR4 board.
3526.2002.1.0.62
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AAT3526/7/8
MicroPower Supervisory Circuit with Manual Reset
(V
IN
= 5V, T
A
= -40 to 85°C unless otherwise noted. Typical values
are at T
A
=25°C, V
CC
= 5V for 4.63/4.38V versions, V
CC
= 3.3V for 3.08/2.93V versions, V
CC
= 3.0V for 2.63V
versions and V
CC
= 2.5V for 2.32/2.2V versions )
Symbol
V
CC
I
Q
V
TH
∆V
TH
/°C
t
P
t
RDY
t
MR
MRGI
t
MD
V
IH
V
IL
R
MR
V
OL
V
OH
Electrical Characteristics
Description
Operation Voltage
Quiescent Current
RESET Threshold (Table 1)
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
V
CC
= V
TH
to (V
TH
-100mV)
Min
1.0
1.2
Typ
Max
Units
V
TH
-1.5%
V
TH
-2.5%
RESET Threshold Tempco
RESET Propagation Delay
RESET Active Timeout Period
MR Minimum Pulse Width
MR Glitch Immunity
MR to Reset Propagation Delay
MR Input Threshold
MR Input Threshold
MR Pull-Up Resistance
RESET Low Output Voltage
AAT3526, AAT3528
RESET High Output Voltage
AAT3526
RESET Low Output Voltage
AAT3527
150
10
5.5
V
5.5
1.05
3
µA
0.85
2
V
TH
V
TH
+1.5%
V
V
TH
V
TH
+2.5%
40
ppm/°C
15
µs
250
400
ms
µs
100
ns
0.5
µs
V
0.8
0.25
×
V
CC
30
0.3
0.4
V
kΩ
V
CC
V
CC
V
CC
V
CC
=
=
=
=
V
TH(MAX)
,
V
TH(MAX)
,
V
TH(MAX)
,
V
TH(MAX)
,
V
TH
V
TH
V
TH
V
TH
≥
4.38V
<
4.38V
≥
4.38V
<
4.38V
2.3
0.7
×
V
CC
10
I
SINK
=1.6mA, V
CC
> 2.1V,
RESET asserted
I
SINK
=100µA, V
CC
>1.2V,
RESET asserted
I
SOURCE
= 800 µA
I
SINK
=1.2mA, V
CC
> 1.2V,
RESET not asserted
I
SINK
= 3.2mA, V
CC
> 4.5V,
RESET not asserted
I
SOURCE
= 500µA, V
CC
> 2.1V,
RESET asserted
I
SOURCE
= 50µA, V
CC
> 1.2V,
RESET asserted
V
CC
> V
TH
20
V
V
CC
-1.5
0.3
0.4
0.8V
CC
0.8V
CC
1
V
V
OL
V
V
OH
I
DOFF
RESET High Output Voltage
AAT3527
RESET leakage current, AAT3528
V
µA
4
3526.2002.1.0.62
AAT3526/7/8
MicroPower Supervisory Circuit with Manual Reset
Typical Characteristics
Supply Current vs. Temperature
1.40
Normalized Reset Threshold
vs. Temperature
Normalized Threshold
1.003
1.002
1.001
1.000
0.999
0.998
0.997
-40
-20
0
20
40
60
80
Supply Current (µA)
1.20
1.00
0.80
0.60
0.40
0.20
0.00
-40
-20
V
CC
=5V
V
CC
=3V
0
20
40
60
80
Temperature (°C)
Temperature (°C)
Power-Up Reset Timeout
vs. Temperature
Reset Propagation Delay (µs)
320
300
30
25
20
15
10
5
0
-40
Power-Down Reset Propagation
Delay vs. Temperature
Power-Up Reset
Timeout (ms)
V
OD
=10mV
280
260
240
220
200
180
160
-40
-20
0
20
40
60
80
100
V
OD
=100mV
-20
0
20
40
60
80
Temperature (°C)
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)
3526.2002.1.0.62
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