PRODUCT DATASHEET
AAT3221/2
PowerLinear
TM
General Description
The AAT3221 and AAT3222 PowerLinear NanoPower low
dropout (LDO) linear regulators are ideal for portable
applications where extended battery life is critical.
These devices feature extremely low quiescent current,
typically 1.1μA. Dropout voltage is also very low, typi-
cally less than 200mV at the maximum output current of
150mA. The AAT3221/2 have an enable pin feature
which, when asserted, will enter the LDO regulator into
shutdown mode, removing power from its load and offer-
ing extended power conservation capabilities for portable
battery-powered applications.
The AAT3221/2 have output short-circuit and over-cur-
rent protection. In addition, the devices also have an
over-temperature protection circuit, which will shut
down the LDO regulator during extended over-current
events. The devices are available with active high or
active low enable input.
The AAT3221 and AAT3222 are available in Pb-free,
space-saving 5-pin SOT23 packages. The AAT3221 is
also available in a Pb-free, 8-pin SC70JW package. The
device is rated over the -40°C to +85°C temperature
range. Since only a small, 1μF ceramic output capacitor
is recommended, often the only space used is that occu-
pied by the AAT3221/2 itself. The AAT3221/2 provide a
compact and cost-effective voltage conversion solution.
The AAT3221 and AAT3122 are similar to the AAT3220,
with the exception that they offer further power savings
with an enable pin.
150mA NanoPower™ LDO Linear Regulator
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
1.1μA Quiescent Current
Low Dropout: 200mV (typical)
Guaranteed 150mA Output
High Accuracy: ±2%
Current Limit Protection
Over-Temperature Protection
Extremely Low Power Shutdown Mode
Low Temperature Coefficient
Factory-Programmed Output Voltages
▪
1.5V to 3.5V
Stable Operation With Virtually Any Output Capacitor
Type
Active High or Low Enable Pin
4kV ESD
5-Pin SOT23 or 8-Pin SC70JW Package
-40°C to +85°C Temperature Range
Applications
•
•
•
•
•
•
•
Cellular Phones
Digital Cameras
Handheld Electronics
Notebook Computers
PDAs
Portable Communication Devices
Remote Controls
Typical Application
INPUT
IN
OUT
OUTPUT
AAT3221/2
C
IN
1μF
ENABLE
(ENABLE)
EN
(EN)
GND
C
OUT
1μF
GND
GND
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1
PRODUCT DATASHEET
AAT3221/2
PowerLinear
TM
Absolute Maximum Ratings
1
T
A
= 25°C, unless otherwise noted.
Symbol
V
IN
V
EN
V
ENIN(MAX)
I
OUT
T
J
150mA NanoPower™ LDO Linear Regulator
Description
Input Voltage, <30ms, 10% DC (continuous max = 6.0V)
EN (EN) to GND Voltage
Maximum EN (EN) to Input Voltage
Maximum DC Output Current
Operating Junction Temperature Range
Value
-0.3 to 7
-0.3 to 6
0.3
P
D
/(V
IN
-V
O
)
-40 to 150
Units
V
V
V
mA
°C
Thermal Information
2
Symbol
Θ
JA
P
D
Description
Thermal Resistance
Power Dissipation
Value
150
667
Units
°C/W
mW
Recommended Operating Conditions
Symbol
V
IN
T
Description
Input Voltage
3
Ambient Temperature Range
Rating
(V
OUT
+ V
DO
) to 5.5
-40 to +85
Units
V
°C
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.
3. To calculate minimum input voltage, use the following equation: V
IN(MIN)
= V
OUT(MAX)
+ V
DO(MAX)
as long as V
IN
≥
2.5V.
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3
PRODUCT DATASHEET
AAT3221/2
PowerLinear
TM
Electrical Characteristics
V
IN
= V
OUT(NOM)
+ 1V, I
OUT
= 1mA, C
OUT
= 1μF, T
A
= 25°C, unless otherwise noted.
Symbol
V
OUT
I
OUT
I
SC
I
Q
I
SD
ΔV
OUT
/V
OUT
*ΔV
IN
150mA NanoPower™ LDO Linear Regulator
Description
DC Output Voltage Tolerance
Output Current
Short-Circuit Current
Ground Current
Shutdown Current
Line Regulation
Conditions
V
OUT
> 1.2V
V
OUT
< 0.4V
V
IN
= 5V, No Load
EN = Inactive
V
IN
= 4.0V to 5.5V
V
OUT
= 1.5
V
OUT
= 1.6
V
OUT
= 1.7
V
OUT
= 1.8
V
OUT
= 1.9
V
OUT
= 2.0
V
OUT
= 2.3
V
OUT
= 2.4
V
OUT
= 2.5
V
OUT
= 2.6
V
OUT
= 2.7
V
OUT
= 2.8
V
OUT
= 2.85
V
OUT
= 2.9
V
OUT
= 3.0
V
OUT
= 3.1
V
OUT
= 3.3
V
OUT
= 3.5
V
OUT
= 2.3
V
OUT
= 2.4
V
OUT
= 2.5
V
OUT
= 2.6
V
OUT
= 2.7
V
OUT
= 2.8
V
OUT
= 2.85
V
OUT
= 2.9
V
OUT
= 3.0
V
OUT
= 3.1
V
OUT
= 3.3
V
OUT
= 3.5
Min
-2.0
150
Typ
Max
2.0
Units
%
mA
mA
μA
nA
%/V
ΔV
OUT
/V
OUT
Load Regulation
I
L
= 1 to 100mA
V
DO
Dropout Voltage
1, 2
I
OUT
= 100mA
350
1.1
20
0.15
1.3
1.2
1.1
1.0
1.0
0.9
0.8
0.8
0.8
0.8
0.7
0.7
0.7
0.7
0.6
0.6
0.5
0.5
230
220
210
205
200
190
190
190
190
188
180
180
2.0
2.4
0.01
50
140
20
350
80
2.5
0.4
1.72
1.69
1.67
1.65
1.62
1.58
1.45
1.40
1.35
1.30
1.25
1.20
1.20
1.18
1.15
1.06
1.00
1.00
275
265
255
247
240
235
230
228
225
222
220
220
0.8
%
mV
V
EN(L)
V
EN(H)
I
EN(SINK)
PSRR
T
SD
T
HYS
e
N
T
C
EN Input Low Voltage
EN Input High Voltage
EN Input Leakage
Power Supply Rejection Ratio
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Output Noise
Output Voltage Temperature Coefficient
V
IN
= 2.7V to 3.6V
V
IN
= 5V
V
ON
= 5.5V
100Hz
V
V
1
μA
dB
°C
°C
μV
RMS
PPM/°C
1. V
DO
is defined as V
IN
- V
OUT
when V
OUT
is 98% of nominal.
2. For V
OUT
< 2.3V, V
DO
= 2.5V - V
OUT
.
4
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3221.2007.11.1.12
PRODUCT DATASHEET
AAT3221/2
PowerLinear
TM
Typical Characteristics
Unless otherwise noted, V
IN
= V
OUT
+ 1V, T
A
= 25°C, C
OUT
= 5.6μF Ceramic, I
OUT
= 100mA.
150mA NanoPower™ LDO Linear Regulator
Output Voltage vs. Output Current
3.03
3.1
Output Voltage vs. Input Voltage
Output Voltage (V)
Output Voltage (V)
3.02
3.01
3
2.99
2.98
2.97
0
20
40
60
80
100
3
2.9
2.8
2.7
2.6
2.5
2.7
2.9
3.1
3.3
3.5
1mA
40mA
-30°C
25°C
80°C
10mA
Output Current (mA)
Input Voltage (V)
Output Voltage vs. Input Voltage
3.03
400
Dropout Voltage vs. Output Current
3.02
1mA
10mA
40mA
Dropout Voltage (mV)
Output Voltage (V)
300
80°C
200
3.01
25°C
-30°C
3
100
2.99
3.5
4
4.5
5
5.5
0
0
25
50
75
100
125
150
Input Voltage (V)
Output Current (mA)
Supply Current vs. Input Voltage
Input Current (µA) with No Load
2.0
1.6
1.2
0.8
0.4
0
0
1
2
3
4
5
6
0
1.E+01
60
PSRR with 10mA Load
-30°C
PSRR (dB)
80°C
25°C
40
20
1.E+02
1.E+03
1.E+04
1.E+05
Input Voltage (V)
Frequency (Hz)
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