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AAT3527ICX-293-200-T1 데이터시트 PDF




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부품번호 AAT3527ICX-293-200-T1 기능
기능 MicroPower Supervisory Circuit with Manual Reset
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AAT3527ICX-293-200-T1 데이터시트, 핀배열, 회로
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
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 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
Applications
• Notebook Computers
• Cell Phones
• Portable Electronics
• Embedded Systems
• Intelligent Instruments
Typical Application
VCC
VCC
AAT3526
MR AAT3527 RESET
AAT3528 (RESET)
*
100k
(nominal)
VCC
RESET
INPUT
uP
GND
GND
*AAT3528 Only
3526.2002.1.0.62
1




AAT3527ICX-293-200-T1 pdf, 반도체, 판매, 대치품
AAT3526/7/8
MicroPower Supervisory Circuit with Manual Reset
Electrical Characteristics (VIN = 5V, TA = -40 to 85°C unless otherwise noted. Typical values
are at TA=25°C, VCC = 5V for 4.63/4.38V versions, VCC = 3.3V for 3.08/2.93V versions, VCC = 3.0V for 2.63V
versions and VCC = 2.5V for 2.32/2.2V versions )
Symbol
VCC
IQ
VTH
VTH/°C
tP
tRDY
tMR
MRGI
tMD
VIH
VIL
RMR
VOL
VOH
VOL
VOH
IDOFF
Description
Operation Voltage
Quiescent Current
RESET Threshold (Table 1)
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
RESET High Output Voltage
AAT3527
RESET leakage current, AAT3528
Conditions
TA = 0ºC to +70ºC
TA = -40ºC to +85ºC
VCC = 5.5V
VCC = 3V
TA = 25ºC
TA = -40ºC to +85ºC
VCC = VTH to (VTH -100mV)
VCC = VTH(MAX), VTH 4.38V
VCC = VTH(MAX), VTH < 4.38V
VCC = VTH(MAX), VTH 4.38V
VCC = VTH(MAX), VTH < 4.38V
ISINK =1.6mA, VCC > 2.1V,
RESET asserted
ISINK =100µA, VCC >1.2V,
RESET asserted
ISOURCE = 800 µA
Min Typ Max Units
1.0
1.2
VTH -1.5%
VTH -2.5%
150
10
2.3
0.7 × VCC
10
1.05
0.85
VTH
VTH
40
15
250
100
0.5
20
5.5 V
5.5
3 µA
2
VTH +1.5%
VTH +2.5%
V
ppm/°C
µs
400 ms
µs
ns
µs
V
0.8
0.25 × VCC
30
0.3
V
k
V
0.4
VCC -1.5
V
ISINK =1.2mA, VCC > 1.2V,
RESET not asserted
ISINK = 3.2mA, VCC > 4.5V,
RESET not asserted
ISOURCE = 500µA, VCC > 2.1V,
RESET asserted
ISOURCE = 50µA, VCC > 1.2V,
RESET asserted
VCC > VTH
0.8VCC
0.8VCC
0.3
V
0.4
V
1 µA
4 3526.2002.1.0.62

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AAT3527ICX-293-200-T1 전자부품, 판매, 대치품
AAT3526/7/8
MicroPower Supervisory Circuit with Manual Reset
Applications Information
Reset Output Options
The AAT3528 has an active low open drain output
and the AAT3526/7 have a push-pull output. The
AAT3528 may be used in multiple voltage systems,
with an external pull-up resistor. This allows the
AAT3528 to interface to microprocessors with high-
er supply voltages up to 5.5V (Figure 2). In the
event of a power down or brown-out condition the
reset signal remains valid until the VCC drops below
1.2V. To ensure validity down to ground an external
100kresistor should be connected between the
RESET output and GND.
Manual Reset Input
A logic low signal on MR asserts a reset condition.
Reset continues to be asserted as long as MR is low
and for a minimum of 150ms after MR returns high.
This input is internally pulled up to VCC via a 20k
resistor, so leaving the pin unconnected is accept-
able if manual reset function is not needed. The MR
input is internally debounced which allows use of a
mechanical switch. It should be a normally-open
momentary switch connected from MR to GND.
Additionally, the MR pin can be driven from TTL,
CMOS, or open drain logic outputs.
Supply Voltage Transient Behavior
In some cases fast negative transients of short dura-
tion can appear on the VCC power supply. The
AAT3526/7/8 series devices provide some immunity
to line transients which can generate invalid reset
pulses. Figure 1 shows typical behavior to short
duration pulses verses RESET comparator over-
drive. As shown in the Maximum Transient Duration
vs. Reset Threshold Overdrive graph, when the
transient voltage becomes larger, the time allowed
before asserting a reset becomes shorter. e.g. typi-
cally a transient of 100mV below the reset threshold
would have to present for more than 50µs to cause
a reset. Immunity can be increased by the addition
of a small by-pass capacitor of 0.1µF connected as
close to the VCC pin as possible.
+3.3V
+5.0V
VCC
AAT3528
MR RESET
GND
100k
VCC
RESET 5V
INPUT System
GND
Figure 2: Using AAT3528 Open Drain Output with Multiple Supplies
3526.2002.1.0.62
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AAT3527ICX-293-200-T1

MicroPower Supervisory Circuit with Manual Reset

Advanced Analogic Technologies
Advanced Analogic Technologies

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