Datasheet AAT3528ICX-4.63-200-T1, AAT3528ICX-4.38-200-T1, AAT3528ICX-2.93-200-T1, AAT3528ICX-2.63-200-T1, AAT3528 Datasheet (Analogic Technologies)

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 sup­plies in portable systems, where extended battery
life is critical. They provide a low cost, reliable 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
VCChas risen back above the fixed threshold. They
are guaranteed to operate down to 1.2V and
designed to ignore fast line transients appearing on

. The AAT3526/7/8 series is available with three

V

CC

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 oper­ating temperature range.

PowerManager

™

Features

• 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

Advanced Information

Typical Application

V

CC

INPUT

V

CC

uP

GNDGND

V

CC

AAT3526

MR

AAT3527
AAT3528

*AAT3528 Only

3526.2002.1.0.62 1

RESET

(RESET)

*

100k
(nominal)

RESET

AAT3526/7/8

MicroPower Supervisory Circuit with Manual Reset

Pin Descriptions

AAT3526, 3527, 3528 (SOT143)

Pin # Symbol Function

1 GND Ground connection

RESET RESET output remains high while VCCis below the reset threshold

(AAT3527) and remains so for a minimum of 150ms after VCCraises above the

2

RESET RESET output remains low while VCCis below the reset threshold

(AAT3526, and remains so for a minimum of 150ms after VCCraises above the

AAT3528) reset threshold

3 MR Manual Reset active low input. A logic low signal on MR asserts a

4 Vcc Supply Voltage (+1.2V to +5.5V)

reset threshold.

reset condition. Asserted reset continues as long as MR is low and
for a minimum of 150ms after MR returns high

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

(RESET) RESET

GND

SOT143

(Top View)

1

2

4

V

CC

3

MR

2 3526.2002.1.0.62

AAT3526/7/8

MicroPower Supervisory Circuit with Manual Reset

Absolute Maximum Ratings (T

=25°C unless otherwise noted)

A

Symbol Description Value Units

V

CC

V

MR

V

RESET

I

, I

VCC

MR

I

RESET

dVcc/dt Rate of rise of V

T

J

T

LEAD

Note: 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.

VCCto GND -0.3 to 5.5 V

MR to GND -0.3 to VCC+0.3 V

RESET to GND (Push-Pull Output) -0.3 to VCC+0.3

V

RESET to GND (Open Drain Output) -0.3 to 5.5

Maximum Continuous Input Current 20 mA

RESET/RESET Current 20 mA

CC

100 V/µs

Operating Junction Temperature Range -40 to 150 °C

Maximum Soldering Temperature (at Leads) for 10s 300 °C

Thermal Information

Symbol Description Value Units

Θ

JA

P

D

Note 1: Mounted on an FR4 board.

Maximum Thermal Resistance (SOT143)

Maximum Power Dissipation (SOT143)

1

1

200 °C/W

320 mW

3526.2002.1.0.62 3

AAT3526/7/8

MicroPower Supervisory Circuit with Manual Reset

Electrical Characteristics (V

= 5V, TA= -40 to 85°C unless otherwise noted. Typical values

IN

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 Description Conditions Min Typ Max Units

T

= 0ºC to +70ºC 1.0 5.5

A

TA= -40ºC to +85ºC 1.2 5.5
V

= 5.5V 1.05 3

CC

VCC= 3V 0.85 2
T

= 25ºC VTH-1.5% VTHVTH+1.5%

A

TA= -40ºC to +85ºC VTH-2.5% VTHVTH+2.5%

V

= V

CC

V

= V

CC

V

= V

CC

V

= V

CC

I

=1.6mA, VCC> 2.1V, 0.3

SINK

=100µA, VCC>1.2V, 0.4

SINK

TH(MAX)

TH(MAX)

TH(MAX)

TH(MAX)

, V

≥ 4.38V 2.3

TH

, V

< 4.38V 0.7 × V

TH

, V

≥ 4.38V 0.8

TH

, V

< 4.38V 0.25 × V

TH

CC

CC

RESET asserted

= 800 µA VCC-1.5 V

SOURCE

I

=1.2mA, VCC> 1.2V, 0.3

SINK

= 3.2mA, VCC> 4.5V, 0.4

SINK

RESET not asserted
I

= 500µA, VCC> 2.1V, 0.8V

SOURCE

= 50µA, VCC> 1.2V, 0.8V

SOURCE

CC

CC

RESET asserted

TH

1µA

V

µA

V

V

V

V

V

V

∆V

V

V

TH

t

RDY

t

I

t

MR

CC

Q

TH

P

Operation Voltage

Quiescent Current

RESET Threshold (Table 1)

/°C RESET Threshold Tempco 40 ppm/°C

RESET Propagation Delay VCC= VTHto (VTH-100mV) 15 µs
RESET Active Timeout Period 150 250 400 ms
MR Minimum Pulse Width 10 µs

MRGI MR Glitch Immunity 100 ns

t

MD

V

V

R

MR

V

OL

V

OH

MR to Reset Propagation Delay 0.5 µs

MR Input Threshold

IH

MR Input Threshold

IL

MR Pull-Up Resistance 10 20 30 kΩ

RESET Low Output Voltage RESET asserted
AAT3526, AAT3528 I

RESET High Output Voltage I
AAT3526

V

V

I

DOFF

OL

OH

RESET Low Output Voltage RESET not asserted
AAT3527 I

RESET High Output Voltage RESET asserted
AAT3527 I

RESET leakage current, AAT3528 VCC> V

4 3526.2002.1.0.62

Typical Characteristics

AAT3526/7/8

MicroPower Supervisory Circuit with Manual Reset

Supply Current vs. Temperature

1.40

1.20

1.00

0.80

0.60

0.40

Supply Current (µA)

0.20

0.00

-40 -20 0 20 40 60 80

VCC=5V

VCC=3V

Temperature (°C)

Power-Up Reset Timeout

vs. Temperature

320

300

280

260

240

220

Timeout (ms)

200

Power-Up Reset

180

160

-40 -20 0 20 40 60 80 100

Temperature (°C)

Normalized Reset Threshold

vs. Temperature

1.003

1.002

1.001

1.000

0.999

0.998

Normalized Threshold

0.997

-40 -20 0 20 40 60 80

Temperature (°C)

Power-Down Reset Propagation

Delay vs. Temperature

30

25

20

15

10

5

0

Reset Propagation Delay (µs)

-40 -20 0 20 40 60 80

VOD=10mV

VOD=100mV

Temperature (°C)

Maximum Transient Duration

vs. Reset Threshold Overdrive

400

350

300

250

200

150

100

Duration (µS)

50

Maximum Transient

0

1 10 100 1000

Reset Threshold Overdrive,

VTH-V

(mV)

CC

3526.2002.1.0.62 5

Functional Block Diagram

V

CC

AAT3526/7/8

MicroPower Supervisory Circuit with Manual Reset

MR

V

REF

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

Reset

Generator

+ Timer

RESET
(RESET)

Oscillator

microprocessor and assert a reset signal whenever
the V

voltage falls below a factory programmed

CC

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 VCChas
risen above the threshold as shown in Figure 1.

V

V

CC

TH

t

RDY

V

TH

V

TH

t

RDY

Figure 1: Reset Timing Diagram

6 3526.2002.1.0.62

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 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 VCCdrops below

1.2V. To ensure validity down to ground an external

100kΩ resistor 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 V
resistor, so leaving the pin unconnected is accept­able if manual reset function is not needed. The MR

via a 20kΩ

CC

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 dura­tion can appear on the VCCpower 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 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 by-pass capacitor of 0.1µF connected as
close to the VCCpin as possible.

+3.3V

V

CC

100k

MR

AAT3528

RESET

RESET

INPUT

Figure 2: Using AAT3528 Open Drain Output with Multiple Supplies

+5.0V

V

CC

5V

System

GNDGND

3526.2002.1.0.62 7

AAT3526/7/8

MicroPower Supervisory Circuit with Manual Reset

Factory Trimmed Reset Thresholds* and Ordering Information Table 1

Reset Threshold Voltage, VTH(V)

= 25ºC TA= 40 to 85ºC

Ordering
Part Number Marking

AAT3526ICX-2.32-200-T1
AAT3527ICX-2.32-200-T1 2.285 2.320 2.355 2.262 2.378
AAT3528ICX-2.32-200-T1

AAT3526ICX-2.63-200-T1
AAT3527ICX-2.63-200-T1 2.591 2.630 2.669 2.564 2.696
AAT3528ICX-2.63-200-T1

AAT3526ICX-2.93-200-T1
AAT3527ICX-2.93-200-T1 2.886 2.930 2.974 2.857 3.003
AAT3528ICX-2.93-200-T1

AAT3526ICX-3.08-200-T1
AAT3527ICX-3.08-200-T1 3.034 3.080 3.126 3.003 3.157
AAT3528ICX-3.08-200-T1

Min Typ Max Min Max

T

A

AAT3526ICX-4.38-200-T1
AAT3527ICX-4.38-200-T1 4.314 4.380 4.446 4.271 4.490
AAT3528ICX-4.38-200-T1

AAT3526ICX-4.63-200-T1
AAT3527ICX-4.63-200-T1 4.561 4.630 4.699 4.514 4.746
AAT3528ICX-4.63-200-T1

*Contact Local Sales Office for custom trimmed options

8 3526.2002.1.0.62

Package Information

SOT143

AAT3526/7/8

MicroPower Supervisory Circuit with Manual Reset

A

PIN 1

A1

B

B1

e1

C

e2

C

S

Dim

Millimeters Inches

Min Max Min Max

A 0.787 1.194 0.031 0.047

L

A1 0.025 1.027 0.001 0.005

B 0.356 0.559 0.014 0.022

C

HE

L

B1 0.762 0.965 0.030 0.038

C 0.086 0.152 0.0034 0.006
D 2.667 3.048 0.105 0.120

E 1.194 1.397 0.047 0.055
E1 1.803 2.007 0.071 0.079
E2 0.200 BSC 0.008 BSC

H 2.083 2.489 0.082 0.098

D

θ

C

C

L

I

L

I 0.102 0.305 0.004 0.012

S 0.450 0.600 0.018 0.024

Θ 0° 8° 0° 8°

3526.2002.1.0.62 9

AAT3526/7/8

MicroPower Supervisory Circuit with Manual Reset

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Advanced Analogic Technologies, Inc.

1250 Oakmead Parkway, Suite 310, Sunnyvale, CA 94086
Phone [phone]
Fax [phone]

10 3526.2002.1.0.62