AAT3201
150mA OmniPowerTM LDO Linear Regulator
Preliminary Information
3201.2002.3.0.91
1
PowerLinear
TM
General Description
The AAT3201 PowerLinearTM OmniPower Low
Dropout Linear Regulator is ideal for systems
where a low cost solution is critical. This device
features extremely low quiescent current which is
typically 20A. Dropout voltage is also very low,
typically 200mV. The AAT3201 has an Enable pin
feature, which when pulled low will enter the LDO
regulator into a shutdown mode removing power
from its load and offering extended power conser-
vation capabilities for portable battery powered
applications.
The AAT3201 has output short circuit and over cur-
rent protection. In addition, the device also has an
over temperature protection circuit, which will shut-
down the LDO regulator during extended over-cur-
rent events.
The AAT3201 is available in the space saving 5-pin
SOT23 package. The device is rated over a -40C
to 85C temperature range. Since only a small, 1F
ceramic output capacitor is recommended, the
AAT3201 is a truly cost effective voltage conversion
solution.
The AAT3201 is similar to the AAT3200 with the
exception that it offers further power savings with
its enable pin.
Features
20 A 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
5-pin SOT23 package
Applications
Consumer Electronics
Cellular Phones
Typical Application
AAT3201
IN
EN
INPUT
GND
OUT
OUTPUT
GND
GND
ENABLE
C
IN
1
F
C
OUT
1
F
Pin Descriptions
Pin Configuration
AAT3201
SOT-23-5
(Top View)
1
2
3
NC
OUT
EN
4
5
IN
GND
Pin #
Symbol
Function
1
IN
Input pin
2
GND
Ground connection pin
3
EN
Enable pin - When pulled low the PMOS pass transistor turns off and all
internal circuitry enters low-power mode, consuming less than 1A.
4
NC
Not Connected
5
OUT
Output pin - should be decoupled with 1F or greater capacitor
AAT3201
150mA OmniPowerTM LDO Linear Regulator
2
3201.2002.3.0.91
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.
Thermal Information
Note 1: Mounted on a demo board.
Recommended Operating Conditions
Symbol
Description
Rating
Units
V
IN
Input Voltage
(V
OUT
+V
DO
) to 5.5
V
T
Ambient Temperature Range
-40 to +85
C
Symbol
Description
Rating
Units
JA
Thermal Resistance (SOT23-5)
1
150
C/W
P
D
Power Dissipation (SOT23-5)
1
667
mW
Symbol
Description
Value
Units
V
IN
Input Voltage
-0.3 to 6
V
V
EN
EN to GND Voltage
-0.3 to 6
V
V
ENIN(MAX)
Maximum EN to Input Voltage
0.3
V
I
OUT
Maximum 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
AAT3201
150mA OmniPowerTM LDO Linear Regulator
3201.2002.3.0.91
3
AAT3201
150mA OmniPowerTM LDO Linear Regulator
4
3201.2002.3.0.91
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
Maximum Output Current
V
OUT
> 1.2 V
150
mA
I
SC
Short Circuit Current
V
OUT
< 0.4 V
350
mA
I
Q
Ground Current
V
IN
= 5 V, no load
20
30
A
I
SD
Shutdown Current
EN = inactive
1
A
V
OUT
/V
OUT
Line Regulation
V
IN
= 4.0-5.5 V
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
/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
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
V
EN(L)
EN Input Low Voltage
0.8
V
V
EN(H)
EN Input High Voltage
V
IN
= 5 V
2.4
V
I
EN(SINK)
EN Input leakage
V
ON
= 5.5 V
0.01
1
A
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
350
V
RMS
T
C
Output Voltage Temp. Coefficient
80
PPM/C
AAT3201
150mA OmniPowerTM LDO Linear Regulator
3201.2002.3.0.91
5
Typical Characteristics
(Unless otherwise noted, V
IN
= V
OUT
+ 1V, T
A
= 25C, C
OUT
= 5.6F ceramic, I
OUT
= 100mA)
Noise Spectrum
-30
-20
-10
0
10
20
30
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
Frequency (Hz)
Noise
(
dB
V/
r
t
H
z
)
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
)
Drop-out Voltage vs. Output Current
0
100
200
300
40 0
0
25
50
75
100
125
150
Output (mA)
Drop-out
(
m
V
)
80C
-30C
25C
Output Voltage vs. Input Voltage
2.99
3
3.01
3.02
3.03
3.5
4
4.5
5
5.5
Input ( V )
O
u
t
p
u
t
(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)
O
u
t
p
u
t
(V)
1mA
10mA
40mA
Output Voltage vs. 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)
80C
25C
-30C
PDF 
ZIP