AAT3238_08 [ANALOGICTECH]

300mA MicroPowerTM High Performance LDO Linear Regulator; 300毫安MicroPowerTM高性能LDO线性稳压器
AAT3238_08
型号: AAT3238_08
厂家: ADVANCED ANALOGIC TECHNOLOGIES    ADVANCED ANALOGIC TECHNOLOGIES
描述:

300mA MicroPowerTM High Performance LDO Linear Regulator
300毫安MicroPowerTM高性能LDO线性稳压器

稳压器
文件: 总13页 (文件大小:1160K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
PRODUCT DATASHEET  
AAT3238  
TM  
TM  
PowerLinear  
300mA MicroPower High Performance LDO Linear Regulator  
General Description  
Features  
The AAT3238 MicroPower low dropout (LDO) linear regu-  
lator is ideally suited for portable applications where  
very fast transient response, extended battery life, and  
small size are critical. The AAT3238 has been specifically  
designed for high-speed turn-on and turn-off perfor-  
mance, fast transient response, good power supply rip-  
ple rejection (PSRR), and is reasonably low noise, mak-  
ing it ideal for powering sensitive circuits with fast  
switching requirements.  
• Low Dropout: 400mV at 300mA  
• Guaranteed 300mA Output  
• High Accuracy: ±1.5%  
• 70µA Quiescent Current  
• Fast Line and Load Transient Response  
• High-Speed Device Turn-On and Shutdown  
• High Power Supply Ripple Rejection  
• Low Self Noise  
• Short-Circuit Protection  
• Over-Temperature Protection  
• Uses Low Equivalent Series Resistance (ESR) Ceramic  
Capacitors  
• Noise Reduction Bypass Capacitor  
• Shutdown Mode for Longer Battery Life  
• Low Temperature Coefficient  
• Factory-Programmed Output Voltages  
• SOT23 6-Pin or SC70JW 8-Pin Package  
Other features include low quiescent current, typically  
70µA, and low dropout voltage, typically less than  
400mV at the maximum output current level of 300mA.  
The device is output short-circuit protected and has a  
thermal shutdown circuit for additional protection under  
extreme operating conditions.  
The AAT3238 also features a low-power shutdown mode  
for extended battery life. A reference bypass pin has  
been provided to improve PSRR performance and output  
noise by connecting a small external capacitor from the  
AAT3238’s reference output to ground.  
Applications  
• Cellular Phones  
• Digital Cameras  
The AAT3238 is available in a Pb-free, space-saving  
6-pin SOT23 or 8-pin SC70JW package in factory-pro-  
grammed voltages.  
• Notebook Computers  
• Personal Portable Electronics  
• Portable Communication Devices  
Typical Application  
VIN  
VOUT  
IN  
OUT  
AAT3238  
BYP  
ON/OFF  
EN  
GND  
1µF  
10nF  
2.2µF  
GND  
GND  
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PRODUCT DATASHEET  
AAT3238  
TM  
TM  
PowerLinear  
300mA MicroPower High Performance LDO Linear Regulator  
Pin Descriptions  
Pin #  
SOT23-6  
SC70JW-8 Symbol Function  
1
2, 5  
5, 6  
8
IN  
GND  
Input voltage pin; should be decoupled with 1µF or greater capacitor.  
Ground connection pin.  
Enable pin; this pin should not be left oating. When pulled low, the PMOS pass transistor  
turns off and all internal circuitry enters low-power mode, consuming less than 1µA.  
3
7
EN  
Bypass capacitor connection; to improve AC ripple rejection, connect a 10nF capacitor to  
GND. This will also provide a soft-start function.  
Output pin; should be decoupled with 2.2µF ceramic capacitor.  
4
6
1
BYP  
2, 3, 4  
OUT  
Pin Configuration  
SOT23-6  
(Top View)  
SC70JW-8  
(Top View)  
6
1
OUT  
GND  
BYP  
IN  
GND  
EN  
8
7
6
5
1
2
3
4
GND  
EN  
IN  
BYP  
OUT  
OUT  
OUT  
2
3
5
4
IN  
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3238.2008.05.1.7  
PRODUCT DATASHEET  
AAT3238  
TM  
TM  
PowerLinear  
300mA MicroPower High Performance LDO Linear Regulator  
Absolute Maximum Ratings1  
TA = 25°C, unless otherwise noted.  
Symbol  
Description  
Value  
Units  
VIN  
VENIN(MAX)  
IOUT  
Input Voltage  
Maximum EN to Input Voltage  
DC Output Current  
6
0.3  
PD/(VIN - VO)  
-40 to 150  
V
V
mA  
°C  
TJ  
Operating Junction Temperature Range  
Recommended Operating Conditions  
Symbol  
Description  
Rating  
Units  
VIN  
T
Input Voltage  
Ambient Temperature Range2  
(VOUT + VDO) to 5.5  
-40 to +85  
V
°C  
Thermal Information3  
Symbol  
Description  
Rating  
Units  
ΘJA  
PD  
Maximum Thermal Resistance  
Maximum Power Dissipation  
150  
667  
°C/W  
mW  
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions 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: VIN(MIN) = VOUT(MAX) + VDO(MAX) as long as VIN 2.5V.  
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PRODUCT DATASHEET  
AAT3238  
TM  
TM  
PowerLinear  
300mA MicroPower High Performance LDO Linear Regulator  
Electrical Characteristics1  
VIN = VOUT(NOM) + 1V for VOUT options greater than 1.5V. VIN = 2.5V for VOUT 1.5V. IOUT = 1mA, COUT = 2.2µF, CIN = 1µF,  
TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.  
Symbol  
Description  
Conditions  
Min Typ Max Units  
TA = 25°C  
TA = -40 to 85°C -2.5  
300  
-1.5  
1.5  
2.5  
VOUT  
Output Voltage Tolerance  
IOUT = 1mA to 300mA  
%
IOUT  
VDO  
ISC  
IQ  
Output Current  
VOUT > 1.2V  
IOUT = 300mA  
VOUT < 0.4V  
mA  
mV  
mA  
Dropout Voltage2, 3  
Short-Circuit Current  
Ground Current  
400  
600  
125  
600  
VIN = 5V, No Load, EN = VIN  
VIN = 5V, EN = 0V  
70  
µA  
1
ISD  
Shutdown Current  
µA  
VOUT  
VOUT*VIN  
/
Line Regulation  
VIN = VOUT + 1 to 5.0V  
0.09  
%/V  
VIN = VOUT + 1V to VOUT + 2V, IOUT = 300mA,  
TR/TF = 2µs  
IOUT = 1mA to 300mA, TR < 5µs  
BYP = Open  
VOUT(line) Dynamic Line Regulation  
VOUT(load) Dynamic Load Regulation  
2.5  
mV  
60  
15  
mV  
µs  
V
V
µA  
tENDLY  
VEN(L)  
VEN(H)  
IEN  
Enable Delay Time  
Enable Threshold Low  
Enable Threshold High  
Leakage Current on Enable Pin  
0.6  
1
1.5  
VEN = 5V  
IOUT = 10mA, CBYP = 10nF  
1kHz  
10kHz  
1MHz  
67  
47  
45  
PSRR  
Power Supply Rejection Ratio  
dB  
TSD  
THYS  
eN  
Over-Temperature Shutdown Threshold  
Over-Temperature Shutdown Hysteresis  
Output Noise  
145  
12  
50  
°C  
°C  
µVrms  
ppm/°C  
TC  
Output Voltage Temperature Coefcient  
22  
1. The AAT3238 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-  
tion with statistical process controls.  
2. VDO is defined as VIN - VOUT when VOUT is 98% of nominal.  
3. For VOUT < 2.1V, VDO = 2.5V - VOUT  
.
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3238.2008.05.1.7  
PRODUCT DATASHEET  
AAT3238  
TM  
TM  
PowerLinear  
300mA MicroPower High Performance LDO Linear Regulator  
Typical Characteristics  
Unless otherwise noted, VIN = 5V, TA = 25°C.  
Dropout Characteristics  
Output Voltage vs. Temperature  
3.20  
3.00  
2.80  
2.60  
2.40  
2.20  
2.00  
1.203  
1.202  
1.201  
1.200  
1.199  
1.198  
1.197  
1.196  
IOUT = 0mA  
IOUT = 300mA  
IOUT = 150mA  
IOUT = 100mA  
IOUT = 50mA  
IOUT = 10mA  
2.70  
2.80  
2.90  
3.00  
3.10  
3.20  
3.30  
-40 -30 -20 -10  
0
10 20 30 40 50 60 70 80 90 100  
Input Voltage (V)  
Temperature (°C)  
Dropout Voltage vs. Output Current  
Ground Current vs. Input Voltage  
90.00  
500  
450  
400  
350  
300  
250  
200  
150  
100  
50  
80.00  
70.00  
60.00  
50.00  
40.00  
30.00  
20.00  
10.00  
0.00  
IOUT = 300mA  
85°C  
IOUT = 150mA  
IOUT = 50mA  
25°C  
IOUT = 0mA  
IOUT = 10mA  
-40°C  
0
0
50  
100  
150  
200  
250  
300  
2
2.5  
3
3.5  
4
4.5  
Input Voltage (V)  
Output Current (mA)  
Quiescent Current vs. Temperature  
Output Voltage vs. Temperature  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
1.203  
1.202  
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 90 100 110 120  
-40 -30 -20 -10  
0
10 20 30 40 50 60 70 80 90 100  
Temperature (°C)  
Temperature (°C)  
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PRODUCT DATASHEET  
AAT3238  
TM  
TM  
PowerLinear  
300mA MicroPower High Performance LDO Linear Regulator  
Typical Characteristics  
Unless otherwise noted, VIN = 5V, TA = 25°C.  
LDO Initial Power-Up Response Time  
Turn-Off Response Time  
(CBYP = 10nF)  
7
6
6
5
VEN (5V/div)  
5
4
4
3
3
2
2
1
1
0
0
-1  
-2  
VOUT (1V/div)  
-1  
Time (50µs/div)  
Time (50µs/div)  
Line Transient Response  
Turn-On Time From Enable (VIN present)  
(CBYP = 10nF)  
6
3.04  
3.03  
3.02  
3.01  
3.00  
2.99  
2.98  
VEN = 5V/div  
5
VIN  
4
3
2
VOUT  
1
0
VIN = 4V  
VOUT = 1V/div  
Time (5µs/div)  
Time (100µs/div)  
Load Transient Response  
Load Transient Response 300mA  
2.90  
2.85  
500  
400  
300  
200  
100  
0
3.00  
800  
700  
600  
500  
400  
300  
200  
100  
0
VOUT  
2.90  
2.80  
2.70  
2.60  
2.50  
2.40  
2.30  
2.20  
2.10  
2.80  
2.75  
2.70  
2.65  
2.60  
VOUT  
IOUT  
IOUT  
-100  
-100  
Time (100µs/div)  
Time (10µs/div)  
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3238.2008.05.1.7  
PRODUCT DATASHEET  
AAT3238  
TM  
TM  
PowerLinear  
300mA MicroPower High Performance LDO Linear Regulator  
Typical Characteristics  
Unless otherwise noted, VIN = 5V, TA = 25°C.  
Over-Current Protection  
AAT3238 Self Noise  
(COUT = 10µF, Ceramic)  
1200  
1000  
800  
600  
400  
200  
0
10  
1
0.1  
Band Power:  
300Hz to 50kHz = 44.6µVrms/rtHz  
100Hz to 100kHz = 56.3µVrms/rtHz  
0.01  
0.001  
-200  
0.01  
0.1  
1
10  
100  
1000  
10000  
Time (20ms/div)  
Frequency (kHz)  
VIH and VIL vs. VIN  
1.250  
1.225  
1.200  
1.175  
1.150  
1.125  
1.100  
1.075  
1.050  
VIH  
VIL  
2.5  
3.0  
3.5  
4.0  
4.5  
5.0  
5.5  
VIN (V)  
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PRODUCT DATASHEET  
AAT3238  
TM  
TM  
PowerLinear  
300mA MicroPower High Performance LDO Linear Regulator  
Functional Block Diagram  
OUT  
IN  
Active  
Feedback  
Control  
Over-Current  
Protection  
Over-  
Temperature  
Protection  
+
Error  
Amplifier  
-
Fast  
Voltage  
Reference  
Start  
EN  
Control  
BYP  
GND  
This rapid transient response behavior is accomplished  
through the implementation of an active error amplifier  
feedback control. This proprietary circuit design is unique  
to this MicroPower LDO regulator.  
Functional Description  
The AAT3238 is intended for LDO regulator applications  
where output current load requirements range from no  
load to 300mA.  
The LDO regulator output has been specifically optimized  
to function with low-cost, low-ESR ceramic capacitors.  
However, the design will allow for operation over a wide  
range of capacitor types.  
The advanced circuit design of the AAT3238 has been  
specifically optimized for very fast start-up and shut-  
down timing. This proprietary CMOS LDO has also been  
tailored for superior transient response characteristics.  
These traits are particularly important for applications  
that require fast power supply timing, such as GSM cel-  
lular telephone handsets.  
A bypass pin has been provided to allow the addition of  
an optional voltage reference bypass capacitor to reduce  
output self noise and increase power supply ripple rejec-  
tion. Device self noise and PSRR will be improved by the  
addition of a small ceramic capacitor in this pin. However,  
increased values of CBYPASS may slow down the LDO regu-  
lator turn-on time.  
The high-speed turn-on capability of the AAT3238 is  
enabled through the implementation of a fast start con-  
trol circuit, which accelerates the power-up behavior of  
fundamental control and feedback circuits within the  
LDO regulator.  
This LDO regulator has complete short-circuit and ther-  
mal protection. The integral combination of these two  
internal protection circuits gives the AAT3238 a compre-  
hensive safety system to guard against extreme adverse  
operating conditions. Device power dissipation is limited  
to the package type and thermal dissipation properties.  
Refer to the Thermal Considerations section of this  
datasheet for details on device operation at maximum  
output current loads.  
Fast turn-off response time is achieved by an active output  
pull-down circuit, which is enabled when the LDO regulator  
is placed in the shutdown mode. This active fast shutdown  
circuit has no adverse effect on normal device operation.  
The AAT3238 has very fast transient response character-  
istics, which is an important feature for applications  
where fast line and load transient response is required.  
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3238.2008.05.1.7  
PRODUCT DATASHEET  
AAT3238  
TM  
TM  
PowerLinear  
300mA MicroPower High Performance LDO Linear Regulator  
Bypass Capacitor and  
Applications Information  
To assure the maximum possible performance is obtained  
from the AAT3238, please refer to the following applica-  
tion recommendations.  
Low Noise Applications  
A bypass capacitor pin is provided to enhance the low  
noise characteristics of the AAT3238 LDO regulator. The  
bypass capacitor is not necessary for operation of the  
AAT3238. However, for best device performance, a small  
ceramic capacitor should be placed between the bypass  
pin (BYP) and the device ground pin (GND). The value of  
CBYP may range from 470pF to 10nF. For lowest noise and  
best possible power supply ripple rejection performance,  
a 10nF capacitor should be used. To practically realize  
the highest power supply ripple rejection and lowest  
output noise performance, it is critical that the capacitor  
connection between the BYP pin and GND pin be direct  
and PCB traces should be as short as possible. Refer to  
the PCB Layout Recommendations section of this docu-  
ment for examples.  
Input Capacitor  
Typically, a 1µF or larger capacitor is recommended for  
CIN in most applications. A CIN capacitor is not required  
for basic LDO regulator operation. However, if the  
AAT3238 is physically located more than three centime-  
ters from an input power source, a CIN capacitor will be  
needed for stable operation. CIN should be located as  
closely to the device VIN pin as practically possible. CIN  
values greater than 1µF will offer superior input line  
transient response and will assist in maximizing the  
highest possible power supply ripple rejection.  
Ceramic, tantalum, or aluminum electrolytic capacitors  
may be selected for CIN. There is no specific capacitor ESR  
requirement for CIN. However, for 300mA LDO regulator  
output operation, ceramic capacitors are recommended  
for CIN due to their inherent capability over tantalum  
capacitors to withstand input current surges from low  
impedance sources such as batteries in portable devices.  
There is a relationship between the bypass capacitor  
value and the LDO regulator turn-on and turn-off time.  
In applications where fast device turn-on and turn-off  
time are desired, the value of CBYP should be reduced.  
In applications where low noise performance and/or  
ripple rejection are less of a concern, the bypass capac-  
itor may be omitted. The fastest device turn-on time will  
be realized when no bypass capacitor is used.  
Output Capacitor  
DC leakage on this pin can affect the LDO regulator output  
noise and voltage regulation performance. For this reason,  
the use of a low leakage, high quality ceramic (NPO or C0G  
type) or film capacitor is highly recommended.  
For proper load voltage regulation and operational stabil-  
ity, a capacitor is required between pins VOUT and GND.  
The COUT capacitor connection to the LDO regulator  
ground pin should be made as direct as practically pos-  
sible for maximum device performance.  
Capacitor Characteristics  
The AAT3238 has been specifically designed to function  
with very low ESR ceramic capacitors. For best perfor-  
mance, ceramic capacitors are recommended.  
Ceramic composition capacitors are highly recommended  
over all other types of capacitors for use with the  
AAT3238. Ceramic capacitors offer many advantages  
over their tantalum and aluminum electrolytic counter-  
parts. A ceramic capacitor typically has very low ESR, is  
lower cost, has a smaller PCB footprint, and is non-  
polarized. Line and load transient response of the LDO  
regulator is improved by using low-ESR ceramic capaci-  
tors. Since ceramic capacitors are non-polarized, they  
are not prone to incorrect connection damage.  
Typical output capacitor values for maximum output cur-  
rent conditions range from 1µF to 10µF. Applications  
utilizing the exceptionally low output noise and optimum  
power supply ripple rejection characteristics of the  
AAT3238 should use 2.2µF or greater for COUT. If desired,  
COUT may be increased without limit.  
In low output current applications where output load is  
less than 10mA, the minimum value for COUT can be as  
low as 0.47µF.  
Equivalent Series Resistance  
ESR is a very important characteristic to consider when  
selecting a capacitor. ESR is the internal series resistance  
associated with a capacitor that includes lead resistance,  
internal connections, size and area, material composi-  
tion, and ambient temperature. Typically, capacitor ESR  
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3238.2008.05.1.7  
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PRODUCT DATASHEET  
AAT3238  
TM  
TM  
PowerLinear  
300mA MicroPower High Performance LDO Linear Regulator  
is measured in milliohms for ceramic capacitors and can  
range to more than several ohms for tantalum or alumi-  
num electrolytic capacitors.  
conditions, the output of the LDO regulator will be cur-  
rent limited until the short-circuit condition is removed  
from the output or the LDO regulator package power  
dissipation exceeds the device thermal limit.  
Ceramic Capacitor Materials  
Ceramic capacitors less than 0.1µF are typically made  
from NPO or C0G materials. NPO and C0G materials  
generally have tight tolerance and are very stable over  
temperature. Larger capacitor values are usually com-  
posed of X7R, X5R, Z5U, or Y5V dielectric materials.  
These two material types are not recommended for use  
with LDO regulators since the capacitor tolerance can  
vary more than ±50% over the operating temperature  
range of the device. A 2.2µF Y5V capacitor could be  
reduced to 1µF over temperature; this could cause prob-  
lems for circuit operation. X7R and X5R dielectrics are  
much more desirable. The temperature tolerance of X7R  
dielectric is better than ±15%.  
Thermal Protection  
The AAT3238 has an internal thermal protection circuit  
which will turn on when the device die temperature  
exceeds 145°C. The internal thermal protection circuit  
will actively turn off the LDO regulator output pass  
device to prevent the possibility of over-temperature  
damage. The LDO regulator output will remain in a shut-  
down state until the internal die temperature falls back  
below the 145°C trip point.  
The combination and interaction between the short-cir-  
cuit and thermal protection systems allow the LDO regu-  
lator to withstand indefinite short-circuit conditions  
without sustaining permanent damage.  
Capacitor area is another contributor to ESR. Capacitors  
that are physically large in size will have a lower ESR  
when compared to a smaller sized capacitor of an equiv-  
alent material and capacitance value. These larger devic-  
es can improve circuit transient response when compared  
to an equal value capacitor in a smaller package size.  
No-Load Stability  
The AAT3238 is designed to maintain output voltage  
regulation and stability under operational no-load condi-  
tions. This is an important characteristic for applications  
where the output current may drop to zero.  
Consult capacitor vendor datasheets carefully when  
selecting capacitors for LDO regulators.  
Reverse Output-to-Input  
Voltage Conditions and Protection  
Enable Function  
The AAT3238 features an LDO regulator enable/  
disable function. This pin (EN) is active high and is com-  
patible with CMOS logic. To assure the LDO regulator will  
switch on, the EN turn-on control level must be greater  
than 1.5V. The LDO regulator will go into the disable  
shutdown mode when the voltage on the EN pin falls  
below 0.6V. If the enable function is not needed in a  
specific application, it may be tied to VIN to keep the LDO  
regulator in a continuously on state.  
Under normal operating conditions, a parasitic diode  
exists between the output and input of the LDO regula-  
tor. The input voltage should always remain greater than  
the output load voltage, maintaining a reverse bias on  
the internal parasitic diode. Conditions where VOUT might  
exceed VIN should be avoided since this would forward  
bias the internal parasitic diode and allow excessive cur-  
rent flow into the VOUT pin, possibly damaging the LDO  
regulator.  
When the LDO regulator is in shutdown mode, an inter-  
nal 1.5kresistor is connected between VOUT and GND.  
This is intended to discharge COUT when the LDO regula-  
tor is disabled. The internal 1.5khas no adverse effect  
on device turn-on time.  
In applications where there is a possibility of VOUT  
exceeding VIN for brief amounts of time during normal  
operation, the use of a larger value CIN capacitor is  
highly recommended. A larger value of CIN with respect  
to COUT will effect a slower CIN decay rate during shut-  
down, thus preventing VOUT from exceeding VIN. In appli-  
cations where there is a greater danger of VOUT exceed-  
ing VIN for extended periods of time, it is recommended  
to place a Schottky diode across VIN to VOUT (connecting  
the cathode to VIN and anode to VOUT). The Schottky  
diode forward voltage should be less than 0.45V.  
Short-Circuit Protection  
The AAT3238 contains an internal short-circuit protec-  
tion circuit that will trigger when the output load current  
exceeds the internal threshold limit. Under short-circuit  
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3238.2008.05.1.7  
PRODUCT DATASHEET  
AAT3238  
TM  
TM  
PowerLinear  
300mA MicroPower High Performance LDO Linear Regulator  
Ordering Information  
Output Voltage  
Package  
Marking1  
Part Number (Tape and Reel)2  
1.2V  
1.5V  
1.6V  
1.8V  
1.85V  
2.0V  
2.3V  
2.5V  
2.7V  
2.8V  
2.85  
3.0V  
3.3V  
3.5V  
1.2V  
1.45V  
1.5V  
1.8V  
2.0V  
2.3V  
2.5V  
2.7V  
2.8V  
2.85  
3.0V  
3.3V  
3.5V  
SOT23-6  
SOT23-6  
SOT23-6  
SOT23-6  
SOT23-6  
SOT23-6  
SOT23-6  
SOT23-6  
SOT23-6  
SOT23-6  
SOT23-6  
SOT23-6  
SOT23-6  
SOT23-6  
SC70JW-8  
SC70JW-8  
SC70JW-8  
SC70JW-8  
SC70JW-8  
SC70JW-8  
SC70JW-8  
SC70JW-8  
SC70JW-8  
SC70JW-8  
SC70JW-8  
SC70JW-8  
SC70JW-8  
KIXYY  
JGXYY  
JSXYY  
JRXYY  
JFXYY  
AAT3238IGU-1.2-T1  
AAT3238IGU-1.5-T1  
AAT3238IGU-1.6-T1  
AAT3238IGU-1.8-T1  
AAT3238IGU-1.85-T1  
AAT3238IGU-2.0-T1  
AAT3238IGU-2.3-T1  
AAT3238IGU-2.5-T1  
AAT3238IGU-2.7-T1  
AAT3238IGU-2.8-T1  
AAT3238IGU-2.85-T1  
AAT3238IGU-3.0-T1  
AAT3238IGU-3.3-T1  
AAT3238IGU-3.5-T1  
AAT3238IJS-1.2-T1  
AAT3238IJS-1.45-T1  
AAT3238IJS-1.5-T1  
AAT3238IJS-1.8-T1  
AAT3238IJS-2.0-T1  
AAT3238IJS-2.3-T1  
AAT3238IJS-2.5-T1  
AAT3238IJS-2.7-T1  
AAT3238IJS-2.8-T1  
AAT3238IJS-2.85-T1  
AAT3238IJS-3.0-T1  
AAT3238IJS-3.3-T1  
AAT3238IJS-3.5-T1  
KUXYY  
QGXYY  
KIXYY  
JGXYY  
FCXYY  
VOXYY  
All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means semiconductor  
products that are in compliance with current RoHS standards, including the requirement that lead not exceed  
0.1% by weight in homogeneous materials. For more information, please visit our website at  
http://www.analogictech.com/about/quality.aspx.  
1. XYY = assembly and date code.  
2. Sample stock is generally held on part numbers listed in BOLD.  
w w w . a n a l o g i c t e c h . c o m  
3238.2008.05.1.7  
11  
PRODUCT DATASHEET  
AAT3238  
TM  
TM  
PowerLinear  
300mA MicroPower High Performance LDO Linear Regulator  
Package Information  
SOT23-6  
2.85 0.15  
1.90 BSC  
0.95 BSC  
0.15 0.07  
GAUGE PLANE  
10° 5°  
0.60 REF  
0.40 0.10 × 6  
0.45 0.15  
0.10 BSC  
SC70JW-8  
0.50 BSC 0.50 BSC 0.50 BSC  
0.225 0.075  
2.00 0.20  
0.048REF  
0.100  
0.45 0.10  
4° 4°  
7° 3°  
2.10 0.30  
All dimensions in millimeters.  
w w w . a n a l o g i c t e c h . c o m  
12  
3238.2008.05.1.7  
PRODUCT DATASHEET  
AAT3238  
TM  
TM  
PowerLinear  
300mA MicroPower High Performance LDO Linear Regulator  
Advanced Analogic Technologies, Inc.  
3230 Scott Boulevard, Santa Clara, CA 95054  
Phone (408) 737-4600  
Fax (408) 737-4611  
© Advanced Analogic Technologies, Inc.  
AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual  
property rights are implied. AnalogicTech reserves the right to make changes to their products or specications or to discontinue any product or service without notice. Except as provided in AnalogicTech’s terms and  
conditions of sale, AnalogicTech assumes no liability whatsoever, and AnalogicTech disclaims any express or implied warranty relating to the sale and/or use of AnalogicTech products including liability or warranties  
relating to tness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. In order to minimize risks associated with the customer’s applications, adequate  
design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to  
support this warranty. Specic testing of all parameters of each device is not necessarily performed. AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other  
brand and product names appearing in this document are registered trademarks or trademarks of their respective holders.  
w w w . a n a l o g i c t e c h . c o m  
3238.2008.05.1.7  
13  

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