Analogic AAT3528ICX-2.32-200-T1 Micropowerâ ¢ supervisory circuit with manual reset Datasheet

AAT3526/7/8
MicroPower™ Supervisory Circuit
with Manual Reset
General Description
Features
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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•
•
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.
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
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•
•
•
•
•
•
•
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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
1
AAT3526/7/8
MicroPower™ Supervisory Circuit
with Manual Reset
Pin Descriptions
AAT3526, 3527, 3528 (SOT143)
Pin #
Symbol
1
GND
Function
Ground connection.
RESET
(AAT3527)
RESET output remains high while VCC is below the reset threshold
and remains so for a minimum of 150ms after VCC raises above the
reset threshold.
RESET
(AAT3526,
AAT3528)
RESET output remains low while VCC is below the reset threshold
and remains so for a minimum of 150ms after VCC raises above the
reset threshold.
3
MR
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.
4
VCC
Supply voltage (+1.2V to +5.5V). Due to extremely low operating
current, it is recommended to place a 10nF capacitor between VCC
and GND.
2
Part Number Descriptions
Part Number
Output Type
AAT3526
Reset Output Push Pull Active Low with Delay
AAT3527
Reset Output Push Pull Active High with Delay
AAT3528
Reset Output Open Drain Active Low with Delay
Pin Configuration
SOT143
(Top View)
2
GND
1
(RESET) RESET
2
4
VCC
3
MR
3526.2006.03.1.6
AAT3526/7/8
MicroPower™ Supervisory Circuit
with Manual Reset
Absolute Maximum Ratings1
TA = 25°C, unless otherwise noted.
Symbol
VCC
VMR
VRESET
IVCC, IMR
IRESET
dVcc/dt
TJ
TLEAD
Description
VCC 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 VCC
Operating Junction Temperature Range
Maximum Soldering Temperature (at Leads) for 10s
Value
Units
-0.3 to 5.5
-0.3 to VCC + 0.3
-0.3 to VCC + 0.3
-0.3 to 5.5
20
20
100
-40 to 150
300
V
V
mA
mA
V/µs
°C
°C
Value
Units
200
320
°C/W
mW
V
Thermal Information2
Symbol
ΘJA
PD
Description
Maximum Thermal Resistance
Maximum Power Dissipation
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions 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.
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AAT3526/7/8
MicroPower™ Supervisory Circuit
with Manual Reset
Electrical Characteristics
VIN = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are 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
Description
VCC
Operation Voltage
IQ
Quiescent Current
VTH
RESET Threshold1
∆VTH/°C
tP
tRDY
tMR
MRGI
tMD
VIH
VIL
RMR
VOL
VOH
VOL
VOH
IDOFF
Conditions
Min
TA = 0°C to +70°C
TA = -40°C to +85°C
VCC = 5.5V
VCC = 3V
TA = 25°C
TA = -40°C to +85°C
1.0
1.2
RESET Threshold Tempco
RESET Propagation Delay
VCC = VTH to (VTH - 100mV)
RESET Active Timeout Period
MR Minimum Pulse Width
MR Glitch Immunity
MR to Reset Propagation Delay
VCC = VTH(MAX), VTH ≥ 4.38V
MR Input Threshold (High)
VCC = VTH(MAX), VTH < 4.38V
VCC = VTH(MAX), VTH ≥ 4.38V
MR Input Threshold (Low)
VCC = VTH(MAX), VTH < 4.38V
MR Pull-Up Resistance
ISINK = 1.2mA, VCC = VTH(min),
RESET Low Output Voltage
VTH ≤ 3.08V, RESET Asserted
AAT3526, AAT3528
ISINK = 3.2mA, VCC = VTH(min),
VTH > 3.08V, RESET Asserted
ISOURCE = 800µA, VTH > 3.08V,
RESET High Output Voltage
VCC > VTH (max)
AAT3526
ISOURCE = 500µA, VTH ≤ 3.08V,
VCC > VTH (max)
ISINK = 1.2mA, VCC > VTH (max)
RESET Low Output Voltage
VTH ≤ 3.08V, RESET Not Asserted
AAT3527
ISINK = 3.2mA, VCC > VTH (max)
VTH > 3.08V, RESET Not Asserted
ISOURCE = 500µA, VCC > 2.1V,
RESET High Output Voltage
RESET Asserted
AAT3527
ISOURCE = 50µA, VCC > 1.2V,
RESET Asserted
RESET Leakage Current,
VCC > VTH
AAT3528
Typ
Max
Units
5.5
V
5.5
1.05
3
µA
0.85
2
VTH - 1.5% VTH VTH + 1.5%
V
VTH - 2.5% VTH VTH + 2.5%
40
ppm/°C
15
µs
150
250
400
ms
10
µs
100
ns
0.5
µs
2.3
V
0.7 × VCC
0.8
V
0.25 × VCC
30
65
90
kΩ
0.3
V
0.4
VCC - 1.5
V
0.8 VCC
0.3
V
0.4
0.8VCC
V
0.8VCC
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
Normalized Reset Threshold
vs. Temperature
Supply Current vs. Temperature
1.20
VCC = 5V
1.00
0.80
VCC = 3V
0.60
0.40
0.20
0.00
-40
-20
0
20
1.003
Normalized Threshold
Supply Current (µA)
1.40
40
60
1.002
1.001
1.000
0.999
0.998
0.997
80
-40
-20
0
Temperature (°C)
280
260
240
220
200
180
160
20
40
60
80
100
Temperature (°C)
Reset Propagation Delay (µs)
Power-Up Reset
Timeout (ms)
300
0
60
80
Power-Down Reset Propagation
Delay vs. Temperature
320
-20
40
Temperature (°C)
Power-Up Reset Timeout
vs. Temperature
-40
20
30
25
VOD = 10mV
20
15
10
VOD = 100mV
5
0
-40
-20
0
20
40
60
80
Temperature (°C)
Maximum Transient Duration
vs. Reset Threshold Overdrive
Maximum Transient
Duration (µs)
400
350
300
250
200
150
100
50
0
1
10
100
1000
Reset Threshold Overdrive,
VTH - VCC (mV)
3526.2006.03.1.6
5
AAT3526/7/8
MicroPower™ Supervisory Circuit
with Manual Reset
Functional Block Diagram
MR
VCC
Reset
Generator
+ Timer
RESET
(RESET)
Oscillator
VREF
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 AAT3526/7/8 series of microprocessor reset devices monitor the supply voltage to a
VTH
microprocessor 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 operating
temperature range. The reset signal remains
asserted for a minimum of 150ms after VCC has
risen above the threshold, as shown in Figure 1.
VTH
VTH
VCC
tRDY
tRDY
Figure 1: Reset Timing Diagram.
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3526.2006.03.1.6
AAT3526/7/8
MicroPower™ Supervisory Circuit
with Manual Reset
MR input is internally debounced which allows the
use of a mechanical switch. It should be a normallyopen momentary switch connected from MR to
GND. Additionally, the MR pin can be driven from
TTL, CMOS, or open drain logic outputs.
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 higher 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
100kΩ resistor should be connected between the
RESET output and GND.
Supply Voltage Transient Behavior
In some cases, fast negative transients of short
duration 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 versus RESET comparator overdrive. 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., typically 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 bypass capacitor of 0.1µF connected as
close to the VCC pin as possible.
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 65kΩ
resistor, so leaving the pin unconnected is acceptable if the manual reset function is not needed. The
VCC
*
VCC
VCC
100k
(nominal)
MR
0.1µF
AAT3526
AAT3527 RESET
(RESET)
AAT3528
RESET
µP
INPUT
GND
GND
*AAT3528 Only
Figure 2: Using Recommended Bypass Capacitor.
+3.3V
+5.0V
VCC
VCC
100k
AAT3528
MR
RESET
GND
RESET
INPUT
5V
System
GND
Figure 3: Using AAT3528 Open Drain Output with Multiple Supplies.
3526.2006.03.1.6
7
AAT3526/7/8
MicroPower™ Supervisory Circuit
with Manual Reset
Ordering Information and Factory-Trimmed Reset Thresholds1
Ordering
Part Number2
Marking3
AAT3526ICX-2.32-200-T1
AAT3527ICX-2.32-200-T1
AAT3528ICX-2.32-200-T1
NOXYY
AAT3526ICX-2.63-200-T1
AAT3527ICX-2.63-200-T1
AAT3528ICX-2.63-200-T1
DNXYY
AAT3526ICX-2.93-200-T1
AAT3527ICX-2.93-200-T1
AAT3528ICX-2.93-200-T1
Reset Threshold Voltage, VTH (V)
TA = -40°°C to +85°°C
TA = 25°C
Min
Typ
Max
Min
Max
2.285
2.320
2.355
2.262
2.378
2.591
2.630
2.669
2.564
2.696
DOXYY
DQXYY
FQXYY
2.886
2.930
2.974
2.857
3.003
AAT3528ICX-3.00-200-T1
FIXYY
2.955
3.000
3.045
2.925
3.075
AAT3526ICX-3.08-200-T1
AAT3527ICX-3.08-200-T1
AAT3528ICX-3.08-200-T1
EQXYY
FHXYY
FJXYY
3.034
3.080
3.126
3.003
3.157
AAT3526ICX-4.38-200-T1
AAT3527ICX-4.38-200-T1
AAT3528ICX-4.38-200-T1
GCXYY
HLXYY
4.314
4.380
4.446
4.271
4.490
AAT3526ICX-4.63-200-T1
AAT3527ICX-4.63-200-T1
AAT3528ICX-4.63-200-T1
DPXYY
HMXYY
4.561
4.630
4.699
4.514
4.746
DRXYY
All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means
semiconductor products that are in compliance with current RoHS standards, including
the requirement that lead not exceed 0.1% by weight in homogeneous materials. For more
information, please visit our website at http://www.analogictech.com/pbfree.
1. Contact local Sales Office for custom trimmed options.
2. Sample stock is generally held on all part numbers listed in BOLD.
3. XYY = assembly and date code.
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3526.2006.03.1.6
AAT3526/7/8
MicroPower™ Supervisory Circuit
with Manual Reset
Package Information
SOT143
2.92 ± 0.12
2.37 ± 0.27
1.30 ± 0.10
1.92 BSC
1.01 ± 0.21
0.15 ± 0.07
0.40 ± 0.1 × 3
0.925 ± 0.175
0.20 BSC
4° ± 4°
0.075 ± 0.075
0.825 ± 0.065
0.69 REF
0.50 ± 0.10
All dimensions in millimeters.
© Advanced Analogic Technologies, Inc.
AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights,
or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice.
Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. AnalogicTech
warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with AnalogicTech’s standard warranty. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed.
Advanced Analogic Technologies, Inc.
830 E. Arques Avenue, Sunnyvale, CA 94085
Phone (408) 737-4600
Fax (408) 737-4611
3526.2006.03.1.6
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