AAT3216
150mA MicroPower™ LDO with PowerOK
General Description
The AAT3216 MicroPower low dropout (LDO) lin-
ear regulator is ideally suited for portable applica-
tions where low noise, extended battery life, and
small size are critical. The AAT3216 has been
specifically designed for low output noise perform-
ance, fast transient response, and high power sup-
ply rejection ratio (PSRR), making it ideal for pow-
ering sensitive RF circuits.
Other features include low quiescent current, typi-
cally 70µA, and low dropout voltage, typically less
than 200mV at full output current. The device is
output short-circuit protected and has a thermal
shutdown circuit for additional protection under
extreme conditions.
The AAT3216 also features a low-power shutdown
mode for extended battery life. A Power-OK open-
drain output signals when V
OUT
is in regulation.
The AAT3216 is available in a Pb-free, space-saving
5-pin SOT23 or 8-pin SC70JW package in 12 facto-
ry-programmed voltages: 1.2V, 1.5V, 1.8V, 2.0V,
2.3V, 2.5V, 2.7V, 2.8V, 2.85V, 3.0V, 3.3V, or 3.5V.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
PowerLinear
™
SmartSwitch
™
Low Dropout: 200mV at 150mA
Guaranteed 150mA Output
High Accuracy: ±1.5%
70µA Quiescent Current
High Power Supply Ripple Rejection
Low Self Noise
Power-OK (POK) Output
Fast Line and Load Transient Response
Short-Circuit and Over-Temperature
Protection
Uses Low Equivalent Series Resistance
(ESR) Ceramic Capacitors
Shutdown Mode for Longer Battery Life
Low Temperature Coefficient
12 Factory-Programmed Output Voltages
SOT23 5-Pin or SC70JW 8-Pin Package
Applications
•
•
•
•
•
•
Cellular Phones
Desktop Computers
Digital Cameras
Notebook Computers
Personal Portable Electronics
Portable Communication Devices
Typical Application
V
IN
IN
OUT
V
OUT
AAT3216
ON/OFF
EN
GND
1µF
POK
100k
POK
2.2µF
GND
GND
3216.2006.01.1.3
1
AAT3216
150mA MicroPower™ LDO with PowerOK
Pin Descriptions
Pin #
SOT23-5
SC70JW-8
Symbol
IN
GND
EN
Function
Input voltage pin; should be decoupled with 1µF or greater
capacitor.
Ground connection pin.
Enable pin; this pin should not be left floating. When pulled low,
the PMOS pass transistor turns off and all internal circuitry
enters low-power mode, consuming less than 1µA.
Power-OK output. This open-drain output is low when OUT is out
of regulation. Connect a pull-up resistor from POK to OUT or IN.
Output pin; should be decoupled with 2.2µF ceramic capacitor.
1
2
3
5, 6
8
7
4
5
1
2, 3, 4
POK
OUT
Pin Configuration
SOT23-5
(Top View)
SC70JW-8
(Top View)
IN
GND
EN
1
5
OUT
2
3
4
POK
POK
OUT
OUT
OUT
1
2
3
4
8
7
6
5
GND
EN
IN
IN
2
3216.2006.01.1.3
AAT3216
150mA MicroPower™ LDO with PowerOK
Absolute Maximum Ratings
1
T
A
= 25°C, unless otherwise noted.
Symbol
V
IN,
POK
V
ENIN(MAX)
I
OUT
T
J
Description
Input Voltage, POK
Maximum EN to Input Voltage
DC Output Current
Operating Junction Temperature Range
Value
6
0.3
P
D
/(V
IN
-V
O
)
-40 to 150
Units
V
V
mA
°C
Thermal Information
2
Symbol
Θ
JA
P
D
Description
Maximum Thermal Resistance (SOT23-5, SC70JW-8)
Maximum Power Dissipation (SOT23-5, SC70JW-8)
Rating
190
526
Units
°C/W
mW
Recommended Operating Conditions
Symbol
V
IN
T
Description
Input Voltage
3
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.
3. To calculate minimum input voltage, use the following equation: V
IN(MIN)
= V
OUT(MAX)
+ V
DO(MAX)
as long as V
IN
≥
2.5V.
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3
AAT3216
150mA MicroPower™ LDO with PowerOK
Electrical Characteristics
V
IN
= V
OUT(NOM)
+ 1V for V
OUT
options greater than 1.5V. V
IN
= 2.5 for V
OUT
≤
1.5V. I
OUT
= 1mA, C
OUT
= 2.2µF,
C
IN
= 1µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= 25°C.
Symbol
V
OUT
I
OUT
V
DO
I
SC
I
Q
I
SD
∆V
OUT
/
V
OUT
*∆V
IN
∆V
OUT
(line)
∆V
OUT
(load)
V
EN(L)
V
EN(H)
I
EN
V
POK
V
POKHYS
V
POK(OL)
I
POK
PSRR
Description
Output Voltage Tolerance
Output Current
Dropout Voltage
1, 2
Short-Circuit Current
Ground Current
Shutdown Current
Line Regulation
3
Dynamic Line Regulation
Dynamic Load Regulation
Enable Threshold Low
Enable Threshold High
Leakage Current on Enable Pin
POK Trip Threshold
POK Hysteresis
POK Output Voltage Low
POK Output Leakage Current
Power Supply Rejection Ratio
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
Output Noise
Output Voltage Temperature
Coefficient
Conditions
I
OUT
= 1mA to 150mA
Min Typ Max
T
A
= 25°C
-1.5
T
A
= -40 to 85°C -2.5
150
200
600
70
1.5
2.5
300
125
1
0.09
5
30
0.6
1.5
Units
%
mA
mV
mA
µA
µA
%/V
mV
mV
V
V
µA
% of V
OUT
% of V
OUT
V
µA
dB
V
OUT
> 1.2V
I
OUT
= 150mA
V
OUT
< 0.4V
V
IN
= 5V, No Load, EN = V
IN
V
IN
= 5V, EN = 0V
V
IN
= V
OUT
+ 1 to 5.0V
V
IN
= V
OUT
+ 1V to V
OUT
+ 2V,
I
OUT
= 150mA, T
R
/T
F
= 2µs
I
OUT
= 1mA to 150mA, T
R
<5µs
V
EN
= 5V
V
OUT
Rising, T
A
= 25°C
I
SINK
= 1mA
V
POK
< 5.5V, V
OUT
in Regulation
1kHz
I
OUT
= 10mA
10kHz
1MHz
90
94
1
1
98
0.4
1
65
45
42
145
12
250
22
T
SD
T
HYS
e
N
TC
°C
°C
µVrms
ppm/°C
1. V
DO
is defined as V
IN
- V
OUT
when V
OUT
is 98% of nominal.
2. For V
OUT
< 2.3V, V
DO
= 2.5V - V
OUT
.
3. C
IN
= 10µF.
4
3216.2006.01.1.3
AAT3216
150mA MicroPower™ LDO with PowerOK
Typical Characteristics
Unless otherwise noted, V
IN
= 5V, T
A
= 25°C.
Dropout Voltage vs. Temperature
3.20
260
240
220
200
180
160
140
120
100
80
60
40
20
0
Dropout Characteristics
3.00
Dropout Voltage (mV)
Output Voltage (V)
I
L
= 150mA
I
OUT
= 0mA
2.80
2.60
I
L
= 100mA
I
OUT
= 10mA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 150mA
2.40
2.20
2.00
2.70
I
L
= 50mA
-40 -30 -20 -10 0
10 20 30 40 50 60 70 80 90 100 110 120
2.80
2.90
3.00
3.10
3.20
Temperature (°C)
Input Voltage (V)
Dropout Voltage vs. Output Current
90.00
Ground Current vs. Input Voltage
80.00
300
Dropout Voltage (mV)
250
200
150
100
50
0
0
25
50
75
100
125
150
Ground Current (µA)
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
2
2.5
3
3.5
4
4.5
5
85°C
25°C
-40°C
I
OUT
= 150mA
I
OUT
= 0mA
I
OUT
= 50mA
I
OUT
= 10mA
Output Current (mA)
Input Voltage (V)
Quiescent Current vs. Temperature
100
Output Voltage vs. Temperature
1.203
1.202
Quiescent Current (µA)
90
Output Voltage (V)
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80 90 100 110 120
80
70
60
50
40
30
20
10
0
1.201
1.200
1.199
1.198
1.197
1.196
-40 -30 -20 -10
0
10 20
30
40
50 60
70 80
90 100
Temperature (°C)
Temperature (°C)
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