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PDF AAT3524IGY-463-200-T1 Data sheet ( Hoja de datos )
| Número de pieza | AAT3524IGY-463-200-T1 | |
| Descripción | MicroPower Microprocessor Reset Circuit | |
| Fabricantes | Advanced Analogic Technologies | |
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Hay una vista previa y un enlace de descarga de AAT3524IGY-463-200-T1 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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AAT3520/2/4
MicroPower Microprocessor Reset Circuit
General Description
The AAT3520 Series of PowerManager™ products
is a member of AATI'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 external components.
The AAT3520 series operates 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 fixed time period after
VCC has risen back above the fixed threshold; 30ms
and 150ms minimum periods are available. The
AAT3520 product series is guaranteed to operate
down to 1.2V and designed to ignore fast line tran-
sients appearing on VCC. 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 current is
extremely low, typically 1µA, making it ideal for
portable battery operated equipment.
The AAT3520/2/4 are available in a 3 pin SOT23
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
• Reset pulse width options
• Minimum 30 ms or 150ms
• Fast propagation delay <20µs
• Available output configurations:
• Open-drain output
• CMOS active high output
• CMOS active low output
• Temp range -40 to 85°C
• 3 pin SOT23 package
Applications
• Notebook Computers
• Cell Phones
• Portable Electronics
• Embedded Systems
• Intelligent Instruments
Typical Application
VCC
VCC
AAT3520
AAT3522 RESET
AAT3524 (RESET)
GND
*
100k
(nominal)
VCC
RESET
INPUT
uP
GND
3520.2002.2.0.9
*AAT3524 Only
1
1 page  
AAT3520/2/4
MicroPower Microprocessor Reset Circuit
Functional Block Diagram
VCC
VREF
Reset
Generator
+ Timer
RESET
(RESET)
Oscillator
GND
Functional Description
General
During start-up, the reset pin on a microprocessor
ensures that it is fully reset and starts up in a known
condition. The AAT3520 series of microprocessor
reset devices monitor the supply voltage to a micro-
processor and assert a reset signal whenever the
VCC voltage falls below a factory programmed
threshold. This threshold is accurate within +/-1.5%
at 25ºC and within +/- 2.5% over the entire operat-
ing temperature range. The reset signal remains
asserted for a fixed time period (tRDY) after VCC has
risen above the threshold as shown in Figure 1.
See Ordering Information for available RESET
active timeout periods
VCC
VTH
VTH
VTH
RESET
tRDY
Figure 1: Reset Timing Diagram (AAT3522, AAT3524)
3520.2002.2.0.9
tRDY
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet AAT3524IGY-463-200-T1.PDF ] | |
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