AAT3221/2
150mA NanoPower™ LDO Linear Regulator
General Description
The AAT3221 and AAT3222 PowerLinear™
NanoPower Low Dropout Linear Regulators are
ideal for portable applications where extended bat-
tery life is critical. This device features extremely
low quiescent current which is typically 1.1µA.
Dropout voltage is also very low, typically less than
200mV at the maximum output current of 150mA.
The AAT3221/2 has an Enable pin feature, which
when asserted will enter the LDO regulator into a
shutdown mode removing power from its load and
offering extended power conservation capabilities
for portable battery powered applications.
The AAT3221/2 has output short circuit and over
current protection. In addition, the device also has
an over temperature protection circuit, which will
shutdown the LDO regulator during extended over-
current events. It is available with active high or
active low enable input.
The AAT3221 and AAT3222 are available in space
saving 5-pin SOT23 packages. The AAT3221 is
also available in the 8-pin SC70JW package. The
device is rated over a -40°C to 85°C temperature
range. Since only a small, 1µF ceramic output
capacitor is recommended, often the only space
used is that occupied by the AAT3221/2 itself. The
AAT3221/2 is truly a compact and cost effective volt-
age conversion solution.
The AAT3221/2 is similar to the AAT3220 with the
exception that it offers further power savings with
its enable pin.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
PowerLinear
™
1.1 µA Quiescent Current
Low Dropout: 200 mV (typical)
Guaranteed 150 mA Output
High accuracy: ±2%
Current limit protection
Over-Temperature protection
Extremely Low power shutdown mode
Low Temperature Coefficient
Factory programmed output voltages
• 1.8V to 3.5V
Stable operation with virtually any output
capacitor type
Active high or low Enable pin
5-pin SOT23 or 8-pin SC70JW packages
4kV ESD
Preliminary Information
Applications
•
•
•
•
•
•
•
Cellular Phones
Notebook Computers
Portable Communication Devices
Handheld Electronics
Remote Controls
Digital Cameras
PDAs
Typical Application
INPUT
IN
OUT
OUTPUT
AAT3221/2
C
IN
1µF
ENABLE
(ENABLE)
EN
(EN)
GND
C
OUT
1µF
GND
GND
3221.2002.03.0.94
1
AAT3221/2
150mA NanoPower™ LDO Linear Regulator
Absolute Maximum Ratings
Symbol
V
IN
V
EN
V
ENIN(MAX)
I
OUT
T
J
T
LEAD
(T
A
=25°C unless otherwise noted)
Value
-0.3 to 6
-0.3 to 6
0.3
P
D
/(V
IN
-V
O
)
-40 to 150
300
Description
Input Voltage
EN (EN) to GND Voltage
Maximum EN (EN) to Input Voltage
Maximum DC Output Current
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
Units
V
V
V
mA
°C
°C
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.
Thermal Information
Symbol
Θ
JA
P
D
Description
Thermal Resistance (SOT23-5 or SC70JW-8)
1
Power Dissipation (SOT23-5 or SC70JW-8)
1
Rating
150
667
Units
°C/W
mW
Note 1: Mounted on a demo board.
Recommended Operating Conditions
Symbol
V
IN
T
Description
Input Voltage
Ambient Temperature Range
Rating
(V
OUT
+0.34) to 5.5
-40 to +85
Units
V
°C
3221.2002.03.0.94
3
AAT3221/2
150mA NanoPower™ LDO Linear Regulator
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
∆V
OUT
/V
OUT
Description
DC Output Voltage Tolerance
Output Current
Short Circuit Current
Ground Current
Shutdown Current
Line Regulation
Conditions
V
OUT
=2.8V
V
OUT
> 1.2 V
V
OUT
< 0.4 V
V
IN
= 5 V, no load
EN = inactive
V
IN
= 4.0-5.5 V
V
OUT
=
V
OUT
=
V
OUT
=
V
OUT
=
V
OUT
=
I
L
=1 to 100mA
V
OUT
=
V
OUT
=
V
OUT
=
V
OUT
=
V
OUT
=
V
OUT
=
V
OUT
=
V
OUT
=
V
OUT
=
V
OUT
=
V
OUT
=
I
OUT
= 100mA
V
OUT
=
V
OUT
=
V
OUT
=
V
OUT
=
V
OUT
=
V
OUT
=
V
IN
= 2.7 V to 3.6 V
V
IN
= 5 V
V
ON
= 5.5 V
100 Hz
Min
-2.0
-1.4
150
Typ
Max
2.0
1.4
Units
%
mA
mA
µA
nA
%/V
∆V
OUT
/V
OUT
Load Regulation
V
DO
Dropout Voltage
1
1.8
2.0
2.3
2.4
2.5
2.7
2.8
2.85
3.0
3.3
3.5
1.8
2.0
2.3
2.4
2.5
2.7
2.8
2.85
3.0
3.3
3.5
2.0
2.4
350
1.1
20
0.15
1.0
0.9
0.8
0.8
0.8
0.7
0.7
0.7
0.6
0.5
0.5
290
265
230
220
210
200
190
190
190
180
180
2.5
0.4
1.65
1.58
1.45
1.40
1.35
1.25
1.20
1.20
1.15
1.00
1.00
340
315
275
265
255
240
235
230
225
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 Temp Shutdown Threshold
Over Temp Shutdown Hysteresis
Output Noise
Output Voltage Temp. Coefficient
0.01
50
140
20
350
80
1
V
V
V
µA
dB
°C
°C
µV
RMS
PPM/°C
Note 1: V
DO
is defined as V
IN
- V
OUT
when V
OUT
is 98% of nominal.
4
3221.2002.03.0.94
51mcu
京公网安备 11010802033920号
EEWORLD
