Datasheet AAT3200 Datasheet (Analogic Tech)

AAT3200

OmniPower™ LDO Linear Regulator

3200.2005.04.1.1 1

PowerLinear

™

General Description

The AAT3200 PowerLinear™ OmniPower low
dropout (LDO) linear regulator is ideal for systems
where a low-cost solution is required. This device
features extremely low quiescent current which is
typically 20µA. Dropout voltage is also very low,
typically 200mV. The AAT3200 has output short­circuit and over-current protection. In addition, the
device has an over-temperature protection circuit
which will shut down the LDO regulator during
extended over-current events.

The AAT3200 is available in a space-saving SOT23
package or a SOT-89 package for applications
requiring increased power dissipation. The device
is rated over a -40°C to +85°C temperature range.
Since only a small, 1µF ceramic output capacitor is
required, the AAT3200 is a truly cost-effective volt­age conversion solution.

The AAT3201 is a similar product for this applica­tion, especially when a shutdown mode is required
for further power savings.

Features

• 250mA Output for SOT-89 Package

• 150mA Output for SOT23 Package

• 20µA Quiescent Current

• Low Dropout: 200mV (typ)

• High Accuracy: ±2.0%

• Current Limit Protection

• Over-Temperature Protection

• Low Temperature Coefficient

• Factory-Programmed Output Voltages:

1.8V to 3.5V

• Stable Operation With Virtually Any Output
Capacitor Type

• 3-Pin SOT-89 and SOT23 Packages

Applications

• CD-ROM Drives

• Consumer Electronics

Typical Application

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INPUT OUTPUT

IN

OUT

AAT3200

GND

GNDGND

Pin Descriptions

Pin Configuration

SOT23-3 SOT-89

(Top View) (Top View)

Pin #

Symbol Function

SOT23-3 SOT-89

1 1 GND Ground connection.
3 2 IN Input; should be decoupled with 1µF or greater

capacitor.

2 3 OUT Output; should be decoupled with 1µF or greater out-

put capacitor.

AAT3200

OmniPower™ LDO Linear Regulator

2 3200.2005.04.1.1

GND

1

3

IN

3

2

OUT
IN

OUT

2

1

GND

Absolute Maximum Ratings

1

TA= 25°C, unless otherwise noted.

Thermal Information

2

Recommended Operating Conditions

Symbol Description Rating Units

V

IN

Input Voltage (V

OUT+VDO

) to 5.5 V

T Ambient Temperature Range -40 to +85 °C

Symbol Description Rating Units

Θ

JA

Maximum Thermal Resistance (SOT23-3) 200 °C/W
Maximum Thermal Resistance (SOT-89) 50 °C/W

P

D

Maximum Power Dissipation (SOT23-3) 500 mW
Maximum Power Dissipation (SOT-89) 2 W

Symbol Description Value Units

V

IN

Input Voltage -0.3 to 6 V

I

OUT

DC Output Current PD/(VIN-VO)mA

T

J

Operating Junction Temperature Range -40 to 150 °C

T

LEAD

Maximum Soldering Temperature (at leads, 10 sec) 300 °C

AAT3200

OmniPower™ LDO Linear Regulator

3200.2005.04.1.1 3

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 a demo board.

AAT3200

OmniPower™ LDO Linear Regulator

4 3200.2005.04.1.1

Electrical Characteristics

VIN= V

OUT(NOM)

+ 1V, I

OUT

= 1mA, C

OUT

= 1µF, TA= 25°C, unless otherwise noted.

Symbol Description Conditions Min Typ Max Units

V

OUT

DC Output Voltage Tolerance -2.0 2.0 %

I

OUT

SOT-89 Maximum Output Current V

OUT

> 1.2V 250 mA

I

OUT

SOT23 Maximum Output Current V

OUT

> 1.2V 150 mA

I

SC

Short-Circuit Current V

OUT

< 0.4V 350 mA

I

Q

Ground Current VIN= 5V, No Load 20 30 µA

∆V

OUT/VOUT

Line Regulation VIN= 4.0V to 5.5V 0.15 0.6 %/V

V

OUT

= 1.8 1.0 1.65

V

OUT

= 2.0 0.9 1.60

V

OUT

= 2.3 0.8 1.45

V

OUT

= 2.4 0.8 1.40

V

OUT

= 2.5 0.8 1.35

∆V

OUT/VOUT

Load Regulation IL= 1 to 100mA V

OUT

= 2.7 0.7 1.25 %

V

OUT

= 2.8 0.7 1.20

V

OUT

= 2.85 0.7 1.20

V

OUT

= 3.0 0.6 1.15

V

OUT

= 3.3 0.5 1.00

V

OUT

= 3.5 0.5 1.00

V

OUT

= 1.8 290 410

V

OUT

= 2.0 265 385

V

OUT

= 2.3 230 345

V

OUT

= 2.4 220 335

V

OUT

= 2.5 210 335

V

DO

Dropout Voltage

1

I

OUT

= 100mA V

OUT

= 2.7 200 310 mV

V

OUT

= 2.8 190 305

V

OUT

= 2.85 190 300

V

OUT

= 3.0 190 295

V

OUT

= 3.3 180 295

V

OUT

= 3.5 180 290

PSRR Power Supply Rejection Ratio 100Hz 50 dB

T

SD

Over Temperature Shutdown 140 °C
Threshold

T

HYS

Over Temperature Shutdown 20 °C
Hysteresis

e

N

Output Noise 10Hz through 10kHz 350 µV

RMS

T

C

Output Voltage Temperature 80 ppm/°C
Coefficient

1. VDOis defined as VIN- V

OUT

when V

OUT

is 98% of nominal.

AAT3200

OmniPower™ LDO Linear Regulator

3200.2005.04.1.1 5

Typical Characteristics

Unless otherwise noted, VIN= V

OUT

+ 1V, TA= 25°C; output capacitor is 1µF ceramic, I

OUT

= 40mA.

Output Voltage vs. Output Current

3.03

3.02

3.01

3

2.99

Output Voltage (V)

2.98

2.97
020406080100

80°C

30°C

25°C

Output Current (mA)

Output Voltage vs. Input Voltage

3.03

3.02

3.01

3

Output Voltage (V)

2.99

3.544.555.5

Input Voltage (V)

1mA

10mA

40mA

Output Voltage vs. Input Voltage

3.1

3

2.9

1mA

40mA

2.8

2.7

2.6

Output Voltage (V)

2.5

2.7 2.9 3.1 3.3 3.5

10mA

Input Voltage (V)

Dropout Voltage vs. Output Current

400

300

80ºC

200

100

-30ºC

Dropout Voltage (mV)

0

0255075100125150

Ou

tput Current (mA)

25ºC

PSRR With 10mA Load

60

40

20

PSRR (dB)

0

1.E+0 1 1. E+0 2 1. E+0 3 1.E+04 1.E+0 5

Frequency (Hz)

30

20

10

0

-10

Noise (dBµV/rt Hz)

-20

-30

1.E+0 1 1.E+0 2 1.E +0 3 1.E+0 4 1.E+0 5 1.E+0 6

AAT3200 Noise Spectrum

Frequency (Hz)

AAT3200

OmniPower™ LDO Linear Regulator

6 3200.2005.04.1.1

Typical Characteristics

Unless otherwise noted, VIN= V

OUT

+ 1V, TA= 25°C; output capacitor is 1µF ceramic, I

OUT

= 40mA.

0

1

2

3

4

-1 0 1 2

-3

-2

-1

0

1

2

3

4

5

Power-Up With 1mA Load

Time (ms)

Output Voltage (V)

Input Voltage (V)

2

3

4

-1 0 1 2 3

0

80

160

240

320

Load Transient – 1mA/80mA

Time (ms)

Output Voltage (V)

Output Current (mA)

Line Response With 1mA Load

3.8

3.6

3.4

3.2

3

Output Voltage (V)

2.8

2.6

-200 0 200 400 600 800

Time (µs)

Line Response With 100mA Load

3.8

3.6

3.4

3.2

6

5

Input Voltage (V)

4

3

2

1

0

6

5

Input Voltage (V)

4

3

Line Response With 10mA Load

3.8

3.6

3.4

3.2

3

Output Voltage (V)

2.8

2.6

-200 0 200 400 600 800

Time (µs)

Load Transient – 1mA/40mA

4

3

6

5

Input Voltage (V)

4

3

2

1

0

320

Output Current (mA)

240

160

3

Output Voltage (V)

2.8

2.6

-200 0 200 400 600 800

Time (µs)

2

1

0

Output Voltage (V)

2

-1 0 1 2 3

80

0

Time (ms)

AAT3200

OmniPower™ LDO Linear Regulator

3200.2005.04.1.1 7

Typical Characteristics

Unless otherwise noted, VIN= V

OUT

+ 1V, TA= 25°C; output capacitor is 1µF ceramic, I

OUT

= 40mA.

Power-Up With 10mA Load

4

3

2

1

Output Voltage (V)

0

-1 0 1 2

Time (ms)

5
4

Input Voltage (V)

3
2
1
0

-1

-2

-3

Power-Up With 100mA Load

4

3

2

1

Output Voltage (V)

0

-1 0 1 2

Time (ms)

5
4

Input Voltage (V)

3
2
1
0

-1

-2

-3

AAT3200

OmniPower™ LDO Linear Regulator

8 3200.2005.04.1.1

Functional Block Diagram

Functional Description

The AAT3200 is intended for LDO regulator appli­cations where output current load requirements
range from no load to 150mAfor a SOT23 package,
or 250mA for a SOT-89 package.

The advanced circuit design of the AAT3200 has
been optimized for use as the most cost-effective
solution. The typical quiescent current level is just
20µA and it does not increase with increasing cur­rent load. The LDO also demonstrates excellent
power supply rejection ratio (PSRR) and load and
line transient response characteristics.

The LDO regulator output has been specifically
optimized to function with low-cost, low-ESR
ceramic capacitors. However , the design will allow
for operation with a wide range of capacitor types.

The AAT3200 has complete short-circuit and ther­mal protection. The integral combination of these
two internal protection circuits gives the AAT3200 a
comprehensive safety system to guard against
extreme adverse operating conditions. Device
power dissipation is limited to the package type and
thermal dissipation properties. Refer to the thermal
considerations section of this datasheet for details
on device operation at maximum output load levels.

IN

Over-Current
Protection

Over-Temperature

Protection

V

REF

OUT

GND

Applications Information

To assure the maximum possible performance is
obtained from the AAT3200, please refer to the fol­lowing application recommendations.

Input Capacitor

Typically, a 1µF or larger capacitor is recommended
for CINin most applications. A CINcapacitor is not
required for basic LDO regulator operation.
However, if the AAT3200 is physically located any
distance more than one or two centimeters from the
input power source, a CINcapacitor will be needed
for stable operation. CINshould be located as
closely to the device VINpin as practically possible.
CINvalues greater than 1µF will offer superior input
line transient response and will assist in maximizing
the highest possible power supply ripple rejection.

Ceramic, tantalum, or aluminum electrolytic capaci­tors may be selected for CIN. There is no specific
capacitor equivalent series resistance (ESR)
requirement for CIN. For 150mAto 250mALDO reg­ulator output operation, ceramic capacitors are rec­ommended for CINdue to their inherent capability
over tantalum capacitors to withstand input current
surges from low impedance sources such as bat­teries in portable devices.

Output Capacitor

For proper load voltage regulation and operational
stability, a capacitor is required between pins V

OUT

and GND. The C

OUT

capacitor connection to the
LDO regulator ground pin should be made as direct
as practically possible for maximum device per­formance. The AAT3200 has been specifically
designed to function with very low ESR ceramic
capacitors. Although the device is intended to oper­ate with low ESR capacitors, it is stable over a very
wide range of capacitor ESR, thus it will also work
with some higher ESR tantalum or aluminum elec­trolytic capacitors. However, for best performance,
ceramic capacitors are recommended.

The value of C

OUT

typically ranges from 0.47µF to
10µF; however, 1µF is sufficient for most operating
conditions.

If large output current steps are required by an
application, then an increased value for C

OUT

should be considered. The amount of capacitance
needed can be calculated from the step size of the
change in the output load current expected and the
voltage excursion that the load can tolerate.

The total output capacitance required can be cal­culated using the following formula:

Where:

∆I = maximum step in output current
∆V = maximum excursion in voltage that the load

can tolerate

Note that use of this equation results in capacitor
values approximately two to four times the typical
value needed for an AAT3200 at room temperature.
The increased capacitor value is recommended if
tight output tolerances must be maintained over
extreme operating conditions and maximum opera­tional temperature excursions. If tantalum or alu­minum electrolytic capacitors are used, the capaci­tor value should be increased to compensate for the
substantial ESR inherent to these capacitor types.

Capacitor Characteristics

Ceramic composition capacitors are highly recom­mended over all other types of capacitors for use
with the AAT3200. Ceramic capacitors offer many
advantages over their tantalum and aluminum elec­trolytic counterparts. A ceramic capacitor typically
has very low ESR, is lower cost, has a smaller PCB
footprint, and is non-polarized. Line and load tran­sient response of the LDO regulator is improved by
using low ESR ceramic capacitors. Since ceramic
capacitors are non-polarized, they are less prone
to damage if incorrectly connected.

Equivalent Series Resistance: ESR is a very
important characteristic to consider when selecting
a capacitor. ESR is the internal series resistance
associated with a capacitor that includes lead

AAT3200

OmniPower™ LDO Linear Regulator

3200.2005.04.1.1 9

C

∆I

= × 15µF

OUT

∆V

AAT3200

OmniPower™ LDO Linear Regulator

10 3200.2005.04.1.1

resistance, internal connections, capacitor size and
area, material composition, and ambient tempera­ture. Typically, capacitor ESR is measured in mil­liohms for ceramic capacitors and can range to
more than several ohms for tantalum or aluminum
electrolytic capacitors.

Ceramic Capacitor Materials: Ceramic capacitors
less than 0.1µF are typically made from NPO or C0G
materials. NPO and C0G materials are typically tight
tolerance and very stable over temperature. Larger
capacitor values are typically composed of X7R,
X5R, Z5U, or Y5V dielectric materials. Large ceram­ic capacitors, typically greater than 2.2µF, are often
available in the low-cost Y5V and Z5U dielectrics.
These two material types are not recommended for
use with LDO regulators since the capacitor toler­ance can vary by more than ±50% over the operat­ing temperature range of the device. A 2.2µF Y5V
capacitor could be reduced to 1µF over the full oper­ating temperature range. This can cause problems
for circuit operation and stability. X7R and X5R
dielectrics are much more desirable. The tempera­ture tolerance of X7R dielectric is better than ±15%.

Capacitor area is another contributor to ESR.
Capacitors that are physically large in size will have
a lower ESR when compared to a smaller sized
capacitor of equivalent material and capacitance
value. These larger devices can also improve cir­cuit transient response when compared to an equal
value capacitor in a smaller package size.

Consult capacitor vendor data sheets carefully when
selecting capacitors for use with LDO regulators.

Short-Circuit Protection and Thermal
Protection

The AAT3200 is protected by both current limit and
over-temperature protection circuitry. The internal
short-circuit current limit is designed to activate
when the output load demand exceeds the maxi­mum rated output. If a short-circuit condition were
to continually draw more than the current limit
threshold, the LDO regulator's output voltage will
drop to a level necessary to supply the current

demanded by the load. Under short-circuit or other
over-current operating conditions, the output volt­age will drop and the AAT3200's die temperature
will increase rapidly. Once the regulator's power
dissipation capacity has been exceeded and the
internal die temperature reaches approximately
140°C the system thermal protection circuit will
become active. The internal thermal protection cir­cuit will actively turn off the LDO regulator output
pass device to prevent the possibility of over-tem­perature damage. The LDO regulator output will
remain in a shutdown state until the internal die
temperature falls back below the 140°C trip point.

The combination and interaction between the short­circuit and thermal protection systems allow the
LDO regulator to withstand indefinite short-circuit
conditions without sustaining permanent damage.

No-Load Stability

The AAT3200 is designed to maintain output volt­age regulation and stability under operational no­load conditions. This is an important characteristic
for applications where the output current may drop
to zero. An output capacitor is required for stability
under no-load operating conditions. Refer to the
output capacitor considerations section for recom­mended typical output capacitor values.

Thermal Considerations and High
Output Current Applications

The AAT3200 is designed to deliver a continuous
output load current of 150mA for SOT23 or 250mA
for SOT-89 under normal operating conditions. The
limiting characteristic for the maximum output load
safe operating area is essentially package power dis­sipation and the internal preset thermal limit of the
device. In order to obtain high operating currents,
careful device layout and circuit operating conditions
need to be taken into account. The following discus­sions will assume the LDO regulator is mounted on a
printed circuit board utilizing the minimum recom­mended footprint and the printed circuit board is

0.062-inch thick FR4 material with one ounce copper.

At any given ambient temperature (TA), the maxi­mum package power dissipation can be deter­mined by the following equation:

Constants for the AAT3200 are T

J(MAX)

, the maxi­mum junction temperature for the device which is
125°C and ΘJA= 200°C/W, the SOT23 thermal
resistance. Typically, maximum conditions are cal­culated at the maximum operating temperature
where TA= 85°C, under normal ambient conditions
TA= 25°C. Given TA= 85°C, the maximum pack­age power dissipation is 200mW . At TA= 25°C, the
maximum package power dissipation is 500mW.

The maximum continuous output current for the
AAT3200 is a function of the package power dissi­pation and the input-to-output voltage drop across
the LDO regulator. Refer to the following simple
equation:

For example, if VIN= 5V, V

OUT

= 3V, and TA= 25°C,

I

OUT(MAX)

< 250mA. The output short-circuit protec­tion threshold is set between 150mA and 300mA.
If the output load current were to exceed 250mA or
if the ambient temperature were to increase, the
internal die temperature will increase. If the condi­tion remained constant and the short-circuit protec­tion were not to activate, there would be a potential
damage hazard to LDO regulator since the thermal
protection circuit will only activate after a short-cir­cuit event occurs on the LDO regulator output.

To determine the maximum input voltage for a
given load current, refer to the following equation.
This calculation accounts for the total power dissi­pation of the LDO regulator, including that caused
by ground current.

This formula can be solved for VINto determine the
maximum input voltage.

The following is an example for an AAT3200 set for
a 3.0 volt output:

From the discussion above, P

D(MAX)

was deter-

mined to equal 417mW at TA= 25°C.

Thus, the AAT3200 can sustain a constant 3.0V
output at a 150mA load current as long as VINis ≤

5.5V at an ambient temperature of 25°C. 5.5V is
the maximum input operating voltage for the
AAT3200, thus at 25°C, the device would not have
any thermal concerns or operational V

IN(MAX)

limits.

This situation can be different at 85°C. The follow­ing is an example for an AAT3200 set for a 3.0 volt
output at 85°C:

From the discussion above, P

D(MAX)

was deter-

mined to equal 200mW at TA= 85°C.

AAT3200

OmniPower™ LDO Linear Regulator

3200.2005.04.1.1 11

=

J(MAX)

P

D(MAX)

A

θ

JA

- T

T

V

IN(MAX)

=

P

D(MAX)

I

OUT

+ (V

+ I

OUT

GND

× I

OUT

)

= 3.0V

V

OUT

I

= 150mA

OUT

I

= 20µA

GND

V

IN(MAX)

V

IN(MAX)

500mW + (3.0V × 150mA)

=

150mA + 20µA

> 5.5V

OUT(MAX)

<

VIN - V

OUT

I

P

D(MAX)

P

D(MAX)

= (VIN - V

OUT)IOUT

+ (VIN × I

GND

)

= 3.0V

V

OUT

I

= 150mA

OUT

I

= 20µA

GND

V

IN(MAX)

V

IN(MAX)

200mW + (3.0V × 150mA)

=

150mA + 20µA

= 4.33V

AAT3200

OmniPower™ LDO Linear Regulator

12 3200.2005.04.1.1

Higher input-to-output voltage differentials can be
obtained with the AAT3200, while maintaining
device functions in the thermal safe operating area.
To accomplish this, the device thermal resistance
must be reduced by increasing the heat sink area
or by operating the LDO regulator in a duty-cycled
mode.

For example, an application requires VIN= 5.0V
while V

OUT

= 3.0V at a 150mA load and TA= 85°C.
VINis greater than 4.33V, which is the maximum
safe continuous input level for V

OUT

= 3.0V at
150mA for TA= 85°C. To maintain this high input
voltage and output current level, the LDO regulator
must be operated in a duty-cycled mode. Refer to
the following calculation for duty-cycle operation:

P

D(MAX)

is assumed to be 200mW

For a 150mA output current and a 2.0 volt drop
across the AAT3200 at an ambient temperature of
85°C, the maximum on-time duty cycle for the
device would be 66.6%.

The following family of curves shows the safe oper­ating area for duty-cycled operation from ambient
room temperature to the maximum operating level.

Duty Cycle (%)

Voltage Drop (V)

I

I

= 20µA

GND

= 150mA

OUT

VIN = 5.0V

V

= 3.0V

OUT

P

%DC = 100

%DC = 100

(VIN - V

(5.0V - 3.0V)150mA + (5.0V × 20µA)

OUT)IOUT

D(MAX)

+ (VIN × I

200mW

GND

)

%DC = 66.6%

Device Duty Cycle vs. V

(V

= 2.5V @ 25°C)

OUT

3.5
3

2.5
2

1.5
1

Voltage Drop (V)

0.5
0

0 1020304050607080 90100

Duty Cycle (%)

Device Duty Cycle vs. V

(V

= 2.5V @ 50°C)

OUT

3.5
3

2.5
2

1.5
1

Voltage Drop (V)

0.5
0

0 10 20 30 40 50 60 70 80 90 100

200mA

150mA

DROP

200mA

150mA

DROP

100mA

Duty Cycle (%)

Device Duty Cycle vs. V

(V

= 2.5V @ 85°C)

OUT

DROP

3.5
3

2.5
2

1.5
1

0.5
0

0 10203040 5060 708090100

200mA

150mA

100mA

50mA

High Peak Output Current Applications

Some applications require the LDO regulator to
operate at continuous nominal levels with short
duration, high-current peaks. The duty cycles for
both output current levels must be taken into
account. To do so, one would first need to calcu­late the power dissipation at the nominal continu­ous level, then factor in the addition power dissi­pation due to the short duration, high-current
peaks.

For example, a 3.0V system using a AAT3200IGV-

2.5-T1 operates at a continuous 100mA load cur­rent level and has short 150mAcurrent peaks. The
current peak occurs for 378µs out of a 4.61ms peri­od. It will be assumed the input voltage is 5.0V.

First the current duty cycle percentage must be
calculated:

% Peak Duty Cycle: X/100 = 378µs/4.61ms
% Peak Duty Cycle = 8.2%

The LDO regulator will be under the 100mA load for

91.8% of the 4.61ms period and have 150mA peaks
occurring for 8.2% of the time. Next, the continuous
nominal power dissipation for the 100mAload should
be determined then multiplied by the duty cycle to
conclude the actual power dissipation over time.

P

D(MAX)

= (VIN- V

OUT)IOUT

+ (VINx I

GND

)

P

D(100mA)

= (4.2V - 3.0V)100mA + (4.2V x 20µA)

P

D(100mA)

= 120mW

P

D(91.8%D/C)

= %DC x P

D(100mA)

P

D(91.8%D/C)

= 0.918 x 120mW

P

D(91.8%D/C)

= 110.2mW

The power dissipation for 100mAload occurring for

91.8% of the duty cycle will be 110.2mW. Now the
power dissipation for the remaining 8.2% of the
duty cycle at the 150mA load can be calculated:

P

D(MAX)

= (VIN- V

OUT)IOUT

+ (VINx I

GND

)

P

D(150mA)

= (4.2V - 3.0V)150mA + (4.2V x 20µA)

P

D(150mA)

= 180mW

P

D(8.2%D/C)

= %DC x P

D(150mA)

P

D(8.2%D/C)

= 0.082 x 180mW

P

D(8.2%D/C)

= 14.8mW

The power dissipation for a 150mA load occurring
for 8.2% of the duty cycle will be 14.8mW. Finally,
the two power dissipation levels can be summed to
determine the total power dissipation under the
varied load.

P

D(total)

= P

D(100mA)

+ P

D(150mA)

P

D(total)

= 110.2mW + 14.8mW

P

D(total)

= 125.0mW

The maximum power dissipation for the AAT3200
operating at an ambient temperature of 85°C is
200mW. The device in this example will have a
total power dissipation of 125.0mW. This is well
within the thermal limits for safe operation of the
device.

Printed Circuit Board Layout
Recommendations

In order to obtain the maximum performance from
the AAT3200 LDO regulator, very careful attention
must be paid in regard to the printed circuit board
layout. If grounding connections are not properly
made, power supply ripple rejection and LDO regu­lator transient response can be compromised.

The LDO regulator external capacitors CINand
C

OUT

should be connected as directly as possible
to the ground pin of the LDO regulator. For maxi­mum performance with the AAT3200, the ground
pin connection should then be made directly back
to the ground or common of the source power sup­ply. If a direct ground return path is not possible
due to printed circuit board layout limitations, the
LDO ground pin should then be connected to the
common ground plane in the application layout.

AAT3200

OmniPower™ LDO Linear Regulator

3200.2005.04.1.1 13

AAT3200

OmniPower™ LDO Linear Regulator

14 3200.2005.04.1.1

Ordering Information

Output Voltage Package Marking

1

Part Number (Tape and Reel)

2

1.8V SOT-23-3 FAXYY AAT3200IGY-1.8-T1

2.0V SOT-23-3 EZXYY AAT3200IGY-2.0-T1

2.3V SOT-23-3 AAT3200IGY-2.3-T1

2.4V SOT-23-3 AAT3200IGY-2.4-T1

2.5V SOT-23-3 FRXYY AAT3200IGY-2.5-T1

2.7V SOT-23-3 AAT3200IGY-2.7-T1

2.8V SOT-23-3 EYXYY AAT3200IGY-2.8-T1

2.85V SOT-23-3 AAT3200IGY-2.85-T1

3.0V SOT-23-3 DGXYY AAT3200IGY-3.0-T1

3.3V SOT-23-3 DHXYY AAT3200IGY-3.3-T1

3.5V SOT-23-3 DIXYY AAT3200IGY-3.5-T1

1.8V SOT-89 320018 AAT3200IQY-1.8-T1

2.0V SOT-89 320020 AAT3200IQY-2.0-T1

2.3V SOT-89 320023 AAT3200IQY-2.3-T1

2.4V SOT-89 320024 AAT3200IQY-2.4-T1

2.5V SOT-89 320025 AAT3200IQY-2.5-T1

2.7V SOT-89 320027 AAT3200IQY-2.7-T1

2.8V SOT-89 320028 AAT3200IQY-2.8-T1

2.85V SOT-89 3200285 AAT3200IQY-2.85-T1

3.0V SOT-89 320030 AAT3200IQY-3.0-T1

3.3V SOT-89 320033 AAT3200IQY-3.3-T1

3.5V SOT-89 320035 AAT3200IQY-3.5-T1

1. XYY = assembly and date code.

2. Sample stock is generally held on part numbers listed in BOLD.

Package Information

SOT23-3

All dimensions in millimeters.

AAT3200

OmniPower™ LDO Linear Regulator

3200.2005.04.1.1 15

2.92 ± 0.12

1.30 ± 0.10

0.075 ± 0.075

0.95 BSC

0.40 ± 0.10 × 3

1.90 BSC

2.37 ± 0.27

0.86 ± 0.16

0.96 ± 0.21

4° ± 4°

0.50 ± 0.10

0.54 REF

0.14 ± 0.06

SOT-89

All dimensions in millimeters.

4.50 ± 0.10

AAT3200

OmniPower™ LDO Linear Regulator

16 3200.2005.04.1.1

Advanced Analogic Technologies, Inc.

830 E. Arques Avenue, Sunnyvale, CA 94085
Phone [phone]
Fax [phone]

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, and advise customers 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 l iability.

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.

1.615 ± 0.215

3.00 BSC

MATTED FINISH

2.445 ± 0.155

4.095 ± 0.155

1.00 ± 0.20

1.50 ± 0.10

0.42 ± 0.06 0.42 ± 0.06

0.48 ± 0.08

POLISH

0.395 ± 0.045