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AAT3520 Datasheet(PDF) 1 Page - Advanced Analog Technology, Inc.

Part No. AAT3520
Description  MicroPower™ Microprocessor Reset Circuit
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Maker  AAT [Advanced Analog Technology, Inc.]
Homepage  http://www.aatech.com.tw
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AAT3520 Datasheet(HTML) 1 Page - Advanced Analog Technology, Inc.

   
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AAT3520/2/4
MicroPower™ Microprocessor Reset Circuit
3520.2006.03.1.2
1
Typical Application
*AAT3524 Only
AAT3520
AAT3522
AAT3524
µP
V
CC
VCC
VCC
RESET
(RESET)
GND
GND
RESET
INPUT
100kΩ
(nominal)
*
General Description
The AAT3520 series of PowerManager products is
part of AnalogicTech's Total Power Management
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 low-cost, reli-
able solution by eliminating the need for external
components.
The AAT3520 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 AAT3520 product series is guaranteed to oper-
ate down to 1.2V and is designed to ignore fast line
transients appearing on V
CC.
The AAT3520 series
is available with three output stage versions:
AAT3520 push-pull active high output; AAT3522
push-pull active low output; and AAT3524 open
drain active low output. The quiescent supply cur-
rent is extremely low, typically 1µA, making it ideal
for portable battery-operated equipment.
The AAT3520/2/4 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
— 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
PowerManager


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