AAT3200
OmniPowerTM LDO Linear Regulator
3200.2005.04.1.1
1
PowerLinear
TM
General Description
The AAT3200 PowerLinearTM OmniPower low
dropout (LDO) linear regulator is ideal for systems
where a low-cost solution is required. This device
features extremely low quiescent current which is
typically 20A. Dropout voltage is also very low,
typically 200mV. The AAT3200 has output short-
circuit and over-current protection. In addition, the
device has an over-temperature protection circuit
which will shut down the LDO regulator during
extended over-current events.
The AAT3200 is available in a space-saving SOT23
package or a SOT-89 package 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, the AAT3200 is a truly cost-effective volt-
age conversion solution.
The AAT3201 is a similar product for this applica-
tion, especially when a shutdown mode is required
for further power savings.
Features
250mA Output for SOT-89 Package
150mA Output for SOT23 Package
20A Quiescent Current
Low Dropout: 200mV (typ)
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 SOT23 Packages
Applications
CD-ROM Drives
Consumer Electronics
Typical Application
AAT3200
IN
OUT
GND
INPUT
OUTPUT
GND
GND
Pin Descriptions
Pin Configuration
SOT23-3
SOT-89
(Top View)
(Top View)
IN
OUT
GND
1
3
2
IN
OUT
GND
1
2
3
Pin #
Symbol
Function
SOT23-3
SOT-89
1
1
GND
Ground connection.
3
2
IN
Input; should be decoupled with 1F or greater
capacitor.
2
3
OUT
Output; should be decoupled with 1F or greater out-
put capacitor.
AAT3200
OmniPowerTM LDO Linear Regulator
2
3200.2005.04.1.1
Absolute Maximum Ratings
1
T
A
= 25C, unless otherwise noted.
Thermal Information
2
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
Maximum Thermal Resistance (SOT23-3)
200
C/W
Maximum Thermal Resistance (SOT-89)
50
C/W
P
D
Maximum Power Dissipation (SOT23-3)
500
mW
Maximum Power Dissipation (SOT-89)
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
AAT3200
OmniPowerTM LDO Linear Regulator
3200.2005.04.1.1
3
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.
AAT3200
OmniPowerTM LDO Linear Regulator
4
3200.2005.04.1.1
Electrical Characteristics
V
IN
= V
OUT(NOM)
+ 1V, I
OUT
= 1mA, C
OUT
= 1F, T
A
= 25C, unless otherwise noted.
Symbol
Description
Conditions
Min
Typ
Max
Units
V
OUT
DC Output Voltage Tolerance
-2.0
2.0
%
I
OUT
SOT-89
Maximum Output Current
V
OUT
> 1.2V
250
mA
I
OUT
SOT23
Maximum 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
20
30
A
V
OUT
/V
OUT
Line Regulation
V
IN
= 4.0V to 5.5V
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
PSRR
Power Supply Rejection Ratio
100Hz
50
dB
T
SD
Over Temperature Shutdown
140
C
Threshold
T
HYS
Over Temperature Shutdown
20
C
Hysteresis
e
N
Output Noise
10Hz through 10kHz
350
V
RMS
T
C
Output Voltage Temperature
80
ppm/C
Coefficient
1. V
DO
is defined as V
IN
- V
OUT
when V
OUT
is 98% of nominal.
AAT3200
OmniPowerTM LDO Linear Regulator
3200.2005.04.1.1
5
Typical Characteristics
Unless otherwise noted, V
IN
= V
OUT
+ 1V, T
A
= 25C; output capacitor is 1F ceramic, I
OUT
= 40mA.
AAT3200 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/rt Hz)
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 (dB)
Dropout Voltage vs. Output Current
0
100
200
300
400
0
25
50
75
100
125
150
Output Current (mA)
Dropout Voltage (mV)
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 Voltage (V)
Output Voltage (V)
1mA
10mA
40mA
Output Voltage vs. 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 Voltage (V)
Output Voltage (V)
1mA
40mA
10mA
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 Current (mA)
Output Voltage (V)
30
C
25
C
80
C
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