AAT3526/7/8
MicroPower™ Supervisory Circuit
with Manual Reset
General Description
The AAT3526/7/8 PowerManager products are
members of AnalogicTech's Total Power Management IC™ (TPMIC™) product family. These microprocessor reset circuits are ideal for monitoring voltage supplies in portable systems, where extended
battery life is critical. They provide a reliable, lowcost 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
VCC 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
VCC. 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 batteryoperated equipment.
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PowerManager™
Features
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.
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
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Applications
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Cell Phones
Embedded Systems
Intelligent Instruments
Notebook Computers
Portable Electronics
Typical Application
VCC
VCC
VCC
*
100k
(nominal)
MR
AAT3526
AAT3527 RESET
(RESET)
AAT3528
GND
RESET
µP
INPUT
GND
*AAT3528 Only
3526.2006.03.1.6
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