AAT3201
150mA OmniPower™ LDO Linear Regulator
General Description
The AAT3201 PowerLinear OmniPower low dropout
(LDO) linear regulator is ideal for systems where a
low-cost solution is critical. This device features
extremely low quiescent current, typically 20µA.
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
shutdown mode, removing power from its load and
offering extended power conservation capabilities
for portable, battery-powered applications.
The AAT3201 has output short-circuit and over-
current protection. In addition, the device has an
over-temperature protection circuit that will shut
down the LDO regulator during extended over-cur-
rent events.
The AAT3201 is available in the Pb-free, space-sav-
ing 5-pin SOT23 package. The device is rated over
the -40°C to +85°C temperature range. Since only
a small, 1µF ceramic output capacitor is recom-
mended, the AAT3201 is a truly cost-effective volt-
age conversion solution.
The AAT3201 is similar to the AAT3200 with the
exception that it offers further power savings with
its enable pin.
Features
•
•
•
•
•
•
•
•
•
•
•
PowerLinear
™
20µA 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
— 1.8V to 3.5V
Stable Operation With Virtually Any Output
Capacitor Type
5-Pin SOT23 Package
Applications
•
•
Cellular Phones
Consumer Electronics
Typical Application
INPUT
IN
OUT
OUTPUT
AAT3201
ENABLE
C
IN
1µF
EN
GND
C
OUT
1µF
GND
GND
3201.2006.01.1.2
1
AAT3201
150mA OmniPower™ LDO Linear Regulator
Pin Descriptions
Pin #
1
2
3
4
5
Symbol
IN
GND
EN
NC
OUT
Function
Input pin.
Ground connection pin.
Enable pin; when pulled low, the PMOS pass transistor turns off and all
internal circuitry enters low-power mode, consuming less than 1µA.
Not connected.
Output pin; should be decoupled with 1µF or greater capacitor.
Pin Configuration
SOT23-5
(Top View)
IN
GND
EN
1
5
OUT
2
3
4
NC
2
3201.2006.01.1.2
AAT3201
150mA OmniPower™ LDO Linear Regulator
Absolute Maximum Ratings
1
T
A
= 25°C, unless otherwise noted.
Symbol
V
IN
V
EN
V
ENIN(MAX)
I
OUT
T
J
T
LEAD
Description
Input Voltage
EN to GND Voltage
Maximum EN to Input Voltage
Maximum DC Output Current
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
Value
-0.3 to 6
-0.3 to 6
0.3
P
D
/(V
IN
-V
O
)
-40 to 150
300
Units
V
V
V
mA
°C
°C
Thermal Information
2
Symbol
Θ
JA
P
D
Description
Thermal Resistance
Power Dissipation
Rating
150
667
Units
°C/W
mW
Recommended Operating Conditions
Symbol
V
IN
T
Description
Input Voltage
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 condi-
tions 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.
3201.2006.01.1.2
3
AAT3201
150mA OmniPower™ 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
Maximum 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
=
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
= 5V
V
ON
= 5.5V
100Hz
Min
-2.0
150
Typ
Max
2.0
Units
%
mA
mA
µA
µA
%/V
350
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
2.4
0.01
50
140
20
350
80
∆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
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
30
1
0.6
1.65
1.60
1.45
1.40
1.35
1.25
1.20
1.20
1.15
1.00
1.00
410
385
345
335
335
310
305
300
295
295
290
0.8
1
%
mV
V
V
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.
4
3201.2006.01.1.2
AAT3201
150mA OmniPower™ LDO Linear Regulator
Typical Characteristics
Unless otherwise noted, V
IN
= V
OUT
+ 1V, T
A
= 25°C, C
OUT
= 5.6µF ceramic, I
OUT
= 100mA.
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
2.9
2.8
2.7
1mA
40mA
-30°C
3
25°C
2.99
80°C
2.98
2.97
0
20
40
60
80
100
10mA
2.6
2.5
2.7
2.9
3.1
3.3
3.5
Output Current (mA)
Input
Voltage (V)
Output Voltage vs. Input Voltage
3.03
40 0
Dropout Voltage vs. Output Current
3.02
1mA
10mA
Dropout Voltage (mV)
Output Voltage (V)
300
80°C
200
3.01
25°C
-30°C
40mA
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)
PSRR With 10mA Load
60
30
Noise Spectrum
40
Noise (dB
µV/rt
Hz )
1.E+02
1.E+03
1.E+04
1.E+05
20
10
0
-10
-20
-30
1.E+01
PSRR (dB)
20
0
1.E+01
Frequency (Hz)
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
Freque ncy (Hz)
3201.2006.01.1.2
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