AAT3526/7/8
MicroPower™ Supervisory Circuit
with Manual Reset
General Description
The AAT3526/7/8 PowerManager products are
members of AnalogicTech's Total Power Manage-
ment IC™ (TPMIC™) product family. These micro-
processor reset circuits are ideal for monitoring volt-
age supplies in portable systems, where extended
battery life is critical. They provide a reliable, low-
cost solution by eliminating external components.
The AAT3526/7/8 products operate by monitoring
the system power supply voltage. When the input
voltage 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.
AAT3526/7/8 devices are available in a Pb-free,
4-pin SOT143 package and are specified over the
-40°C to +85°C operating temperature range.
Features
•
•
•
•
•
•
•
•
•
PowerManager
™
•
•
•
Input Voltage Range: 1.2V to 5.5V
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
Temperature Range: -40°C to +85°C
4-Pin SOT143 Package
4kV ESD Rating
Applications
•
•
•
•
•
Cell Phones
Embedded Systems
Intelligent Instruments
Notebook Computers
Portable Electronics
Typical Application
V
CC
VCC
*
100k
(nominal)
VCC
MR
AAT3526
AAT3527
RESET
(RESET)
AAT3528
RESET
µP
INPUT
GND
GND
*AAT3528 Only
3526.2006.03.1.6
1
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). Due to extremely low operating
current, it is recommended to place a 10nF capacitor between V
CC
and GND.
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
1
4
VCC
(RESET) RESET
2
3
MR
2
3526.2006.03.1.6
AAT3526/7/8
MicroPower™ Supervisory Circuit
with Manual Reset
Absolute Maximum Ratings
1
T
A
= 25°C, unless otherwise noted.
Symbol
V
CC
V
MR
V
RESET
I
VCC
, I
MR
I
RESET
dVcc/dt
T
J
T
LEAD
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
Thermal Information
2
Symbol
Θ
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 condi-
tions 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.
3526.2006.03.1.6
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AAT3526/7/8
MicroPower™ Supervisory Circuit
with Manual Reset
Electrical Characteristics
V
IN
= 5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are 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 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
Description
Operation Voltage
Quiescent Current
RESET Threshold
1
Conditions
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
V
CC
= 5.5V
V
CC
= 3V
T
A
= 25°C
T
A
= -40°C to +85°C
Min
1.0
1.2
Typ
Max
Units
V
OH
V
OL
V
OH
I
DOFF
RESET Threshold Tempco
RESET Propagation Delay
V
CC
= V
TH
to (V
TH
- 100mV)
RESET Active Timeout Period
MR Minimum Pulse Width
MR Glitch Immunity
MR to Reset Propagation Delay
V
CC
= V
TH(MAX)
, V
TH
≥
4.38V
MR Input Threshold (High)
V
CC
= V
TH(MAX)
, V
TH
<
4.38V
V
CC
= V
TH(MAX)
, V
TH
≥
4.38V
MR Input Threshold (Low)
V
CC
= V
TH(MAX)
, V
TH
<
4.38V
MR Pull-Up Resistance
I
SINK
= 1.2mA, V
CC
= V
TH(min)
,
RESET Low Output Voltage
V
TH
≤
3.08V, RESET Asserted
AAT3526, AAT3528
I
SINK
= 3.2mA, V
CC
= V
TH(min)
,
V
TH
>
3.08V, RESET Asserted
I
SOURCE
= 800µA, V
TH
> 3.08V,
RESET High Output Voltage
V
CC
> V
TH (max)
AAT3526
I
SOURCE
= 500µA, V
TH
≤
3.08V,
V
CC
>
V
TH (max)
I
SINK
= 1.2mA, V
CC
> V
TH (max)
RESET Low Output Voltage
V
TH
≤
3.08V, RESET Not Asserted
AAT3527
I
SINK
= 3.2mA, V
CC
> V
TH (max)
V
TH
>
3.08V, RESET Not Asserted
I
SOURCE
= 500µA, V
CC
> 2.1V,
RESET High Output Voltage
RESET Asserted
AAT3527
I
SOURCE
= 50µA, V
CC
> 1.2V,
RESET Asserted
RESET Leakage Current,
V
CC
> V
TH
AAT3528
5.5
V
5.5
1.05
3
µA
0.85
2
V
TH
- 1.5% V
TH
V
TH
+ 1.5%
V
V
TH
- 2.5% V
TH
V
TH
+ 2.5%
40
ppm/°C
15
µs
150
250
400
ms
10
µs
100
ns
0.5
µs
2.3
V
0.7
×
V
CC
0.8
V
0.25
×
V
CC
30
65
90
kΩ
0.3
V
0.4
V
CC
- 1.5
V
0.8 V
CC
0.3
V
0.4
0.8V
CC
V
0.8V
CC
1
µA
1. See Ordering Information for factory-trimmed reset thresholds.
4
3526.2006.03.1.6
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
320
300
Power-Down Reset Propagation
Delay vs. Temperature
Reset Propagation Delay (µs)
30
25
20
15
10
5
0
-40
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)
3526.2006.03.1.6
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