General Description
The AAT3220 PowerLinearTM NanoPower Low
Dropout Linear Regulator is ideal for portable appli-
cations where extended battery life is critical. This
device features extremely low quiescent current
which is typically 1.1A. Dropout voltage is also
very low, typically less than 225mV at the maxi-
mum output current of 150mA. The AAT3220 has
output short circuit and over current protection. In
addition, the device also has an over temperature
protection circuit, which will shutdown the LDO reg-
ulator during extended over current events.
The AAT3220 is available in a space saving SOT-23
package or a SOT-89 for applications requiring
increased power dissipation. The device is rated
over a -40C to 85C temperature range. Since only
a small, 1F ceramic output capacitor is required,
often the only space used is that occupied by the
AAT3220 itself. The AAT3220 is truly a compact and
cost effective voltage conversion solution.
The AAT3221/2 is a similar product for this appli-
cation, especially when a shutdown mode is
required for further power savings.
Features
1.1 A Quiescent Current
Low Dropout: 200 mV (typ)
Guaranteed 150mA Output
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 SOT-23 packages
4kV ESD Rating
Applications
Cellular Phones
Notebook Computers
Portable Communication Devices
Handheld Electronics
Remote Controls
Digital Cameras
PDAs
AAT3220
150mA NanoPowerTM LDO Linear Regulator
Typical Application
AAT3220
IN
OUT
GND
INPUT
OUTPUT
GND
GND
3220.2001.09.1.0
1
PowerLinear
TM
Pin Descriptions
Pin Configuration
SOT-23-3
SOT-89
(Top View)
(Top View)
IN
OUT
GND
1
3
2
OUT
GND
IN
1
2
3
Pin #
Symbol
Function
SOT23-3
SOT-89
1
1
GND
Ground connection
3
2
V
IN
Input - should be decoupled with 1F or greater
capacitor
2
3
OUT
Output - should be decoupled with 1F or greater
output capacitor
N/A
N/A
NC
Not connected
AAT3220
150mA NanoPowerTM LDO Linear Regulator
2
3220.2001.09.1.0
Absolute Maximum Ratings
(T
A
=25C unless otherwise noted)
Note: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at con-
ditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any one time.
Note 1: Human body model is a 100pF capacitor discharged through a 1.5k
W
resistor into each pin.
Thermal Information
Note 2: Mounted on a demo board.
Recommended Operating Conditions
Symbol
Description
RatingUnits
V
IN
Input Voltage
(V
OUT
+0.34) to 5.5
V
T
Ambient Temperature Range
-40 to +85
C
Symbol
Description
RatingUnits
JA
Maximum Thermal Resistance (SOT-23-3)
2
200
C/W
Maximum Thermal Resistance (SOT-89)
2
50
C/W
P
D
Maximum Power Dissipation (SOT-23-3)
2
500
mW
Maximum Power Dissipation (SOT-89)
2
2
W
Symbol
Description
Value
Units
V
IN
Input Voltage
-0.3 to 6
V
I
OUT
DC Output Current
P
D
/(V
IN
-V
O
)
mA
T
J
Operating Junction Temperature Range
-40 to 150
C
T
LEAD
Maximum Soldering Temperature (at leads, 10 sec)
300
C
V
ESD
ESD Rating
1
-- HBM
4000
V
AAT3220
150mA NanoPowerTM LDO Linear Regulator
3220.2001.09.1.0
3
AAT3220
150mA NanoPowerTM LDO Linear Regulator
4
3220.2001.09.1.0
Electrical Characteristics
(V
IN
=V
OUT(NOM)
+1V, I
OUT
=1mA, C
OUT
=1F, T
A
=25C unless otherwise
noted)
Note 1: V
DO
is defined as V
IN
- V
OUT
when V
OUT
is 98% of nominal.
Symbol
Description
Conditions
Min
Typ
Max
Units
V
OUT
DC Output Voltage Tolerance
-2.0
2.0
%
I
OUT
Output Current
V
OUT
> 1.2V
150
mA
I
SC
Short Circuit Current
V
OUT
< 0.4V
350
mA
I
Q
Ground Current
V
IN
= 5V, no load
1.1
2.5
A
V
OUT
/V
OUT
Line Regulation
V
IN
= 4.0-5.5V
0.15
0.4
%/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
/V
OUT
Load Regulation
I
L
=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
340
V
OUT
= 2.0
265
315
V
OUT
= 2.3
230
275
V
OUT
= 2.4
220
265
V
OUT
= 2.5
210
255
V
DO
Dropout Voltage
1
I
OUT
= 100mA
V
OUT
= 2.7
200
240
mV
V
OUT
= 2.8
190
235
V
OUT
= 2.85
190
230
V
OUT
= 3.0
190
225
V
OUT
= 3.3
180
220
V
OUT
= 3.5
180
220
PSRR
Power Supply Rejection Ratio
100 Hz
50
dB
T
SD
Over Temp Shutdown Threshold
140
C
T
HYS
Over Temp Shutdown Hysteresis
20
C
e
N
Output Noise
10 Hz through 10 kHz
350
V
T
C
Output Voltage Temp. Coeff.
80
ppm/C
AAT3220
150mA NanoPowerTM LDO Linear Regulator
3220.2001.09.1.0
5
Typical Characteristics
(Unless otherwise noted: V
IN
= V
OUT
+ 1V, T
A
= 25C, Output capacitor is 1 F ceramic, I
OUT
= 40 mA)
PSRR with 10mA Load
0
20
40
60
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
Frequency ( Hz )
PSRR
(
d
B
)
Supply Current v. Input Voltage
0
2.0
1.6
1.2
0.8
0.4
0
1
2
3
4
5
6
Input ( V)
Input
(
A
)
with
No
Load
25"C
80"C
-30"C
Drop-out Voltage v. Output Current
0
100
200
300
400
0
25
50
75
100
125
150
Output (mA)
Drop-out
(
m
V
)
80"C
-30"C
25"C
Output Voltage v. Input Voltage
2.99
3
3.01
3.02
3.03
3.5
4
4.5
5
5.5
Input (V)
Output (V)
1mA
10mA
40mA
Output Voltage v. Input Voltage
2.5
2.6
2.7
2.8
2.9
3
3.1
2.7
2.9
3.1
3.3
3.5
Input ( V )
Ou
t
p
u
t (V)
1mA
40mA
10mA
Output Voltage v. Output Current
2.97
2.98
2.99
3
3.01
3.02
3.03
0
20
40
60
80
100
Output (mA)
O
u
t
p
u
t (V)
30"C
25"C
80"C
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