AME8803IEEY [AME]
300mA CMOS LDO; 300毫安CMOS LDO
| 型号： | AME8803IEEY |
| 厂家： | 
ANALOG MICROELECTRONICS |
| 描述： | 300mA CMOS LDO |
| 文件： | 总13页 (文件大小：120K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Analog Microelectronics, Inc.
AME8803/8814
300mA CMOS LDO
n General Description
n Features
The AME8803 family of positive, linear regulators fea-
ture low quiescent current (30µA typ.) with low dropout
voltage, making them ideal for battery applications. The
space-saving SOT-23-6 package is attractive for
"Pocket" and "Hand Held" applications.
l Very Low Dropout Voltage
l Guaranteed 300mA Output
l Accurate to within 1.5%
l 30µA Quiescent Current
l Over-Temperature Shutdown
l Current Limiting
These rugged devices have both Thermal Shutdown,
and Current Fold-back to prevent device failure under
the "Worst" of operating conditions.
l Short Circuit Current Fold-back
l Noise Reduction Bypass Capacitor
l Power Good Detector
An additional feature is a "Power Good" detector, which
pulls low when the output is out of regulation. In appli-
cations requiring a low noise, regulated supply, place a
1000pF capacitor between Bypass and ground.
l Power-Saving Shutdown Mode
l Space-Saving SOT-26 (SOT-23-6)
l Factory Pre-set Output Voltages
l Low Temperature Coefficient
The AME8803 is stable with an output capacitance of
2.2µF or greater.
n Applications
l Instrumentation
l Portable Electronics
l Wireless Devices
l Cordless Phones
l PC Peripherals
n Functional Block Diagram
l Battery Powered Widgets
l Electronic Scales
IN
OUT
Overcurrent
Shutdown
n Typical Application
Thermal
Shutdown
EN
IN
PG
OUT
IN
AME8803
EN
OUT
BYP
GND
BYP
R1
R2
V
ref x110%
AMP
C1
C2
1nF
C3
2.2
PG
5V
µ
F
1 F
µ
V
ref x90%
Vref=1.215V
GND
1
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8803/8814
n Pin Configuration
AME8814
AME8803
SOT-26 W Top View
SOT-26 Top View
6
5
4
6
5
4
1. V
4. PG
1. EN
4. V
IN
OUT
2. GND
3. EN
5. BYP
2. GND
3. BYP
5. GND
6. V
1
2
3
1
2
3
6. V
OUT
IN
n Ordering Information
Operating
Temp.
Part Number
Marking Output Package
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
AME8803AEEY
AME8803BEEY
AME8803CEEY
AME8803DEEY
AME8803EEEY
AME8803FEEY
AME8803GEEY
AME8803HEEY
AME8803IEEY
AME8803JEEY
AME8803KEEY
AME8803LEEY
AME8803MEEY
AME8803NEEY
AME8803OEEY
AAPww
AAQww
AARww
AASww
AATww
ABQww
ACHww
AGKww
AEQww
AGSww
AHUww
AJKww
AJLww
3.3V
3.0V
2.8V
2.5V
3.8V
3.6V
3.5V
2.7V
3.4V
2.85V
3.7V
1.5V
1.8V
2.9V
3.1V
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
ALAww
ALBww
2
Analog Microelectronics, Inc.
AME8803/8814
300mA CMOS LDO
n Ordering Information
Part Number
Marking Output Package Operating Temp.
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
-40OC to +85OC
AME8814AEEY
AME8814BEEY
AME8814CEEY
AME8814DEEY
AME8814EEEY
AME8814FEEY
AME8814GEEY
AME8814HEEY
AME8814IEEY
AME8814JEEY
AME8814KEEY
AME8814LEEY
AME8814MEEY
AME8814NEEY
AME8814OEEY
AIEww
AIFww
AIGww
AIHww
AIIww
3.3V
3.0V
2.8V
2.5V
3.8V
3.6V
3.5V
2.7V
3.4V
2.85V
3.7V
1.5V
1.8V
2.9V
3.1V
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
AIJww
AIKww
AILww
AIMww
AINww
AIOww
AJDww
AJEww
AKYww
AKZww
Please consult AME sales office or authorized Rep./Distributor for other output voltage and package type availability.
3
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8803/8814
Absolute Maximum Ratings:
n
Parameter
Input Voltage
Maximum
8
Unit
V
Output Current
PD / (VIN - VO)
mA
Output Voltage
GND - 0.3 to VIN + 0.3
B
V
ESD Classification
Recommended operating Conditions:
n
n
Parameter
Ambient Temperature Range
Junction Temperature
Rating
Unit
oC
-40 to +85
-40 to +125
oC
Thermal Information
Parameter
Package
Maximum
Unit
Thermal Resistance (
)
)
SOT-26
260
θja
θja
oC / W
Thermal Resistance (
SOT-26W
SOT-26
260
380
380
Internal Power Dissipation (PD)
( T = 100oC)
∆
mW
oC
Internal Power Dissipation (PD)
SOT-26W
( T = 100oC)
∆
Maximum Junction Temperature
150
300
Maximum Lead Temperature ( 10 Sec)
Caution: Stress above the listed absolute rating may cause permanent damage to the device
4
Analog Microelectronics, Inc.
AME8803/8814
300mA CMOS LDO
n Electrical Specifications
TA = 25 o C unless otherwise noted
Test Condition
Parameter
Input Voltage
Symbol
VIN
Min
Note 1
-1.5
Typ
Max
7
Units
V
Output Voltage Accuracy
VO
IO=1mA
1.5
%
1.2V<VO(NOM)<=2.0V
1300
400
300
IO=300mA
See
chart
Dropout Voltage
VDROPOUT
2.0V<VO(NOM)<=2.8V
2.8V<VO(NOM)
mV
VO=VONOM -2.0%
Output Current
IO
ILIM
ISC
IQ
VO>1.2V
300
300
mA
mA
mA
Current Limit
VO>1.2V
VO<0.8V
450
150
30
Short Circuit Current
Quiescent Current
Ground Pin Current
300
50
IO=0mA
A
µ
µ
IGND
IO=1mA to 300mA
35
A
V
O < 2.0V
-0.15
-0.1
-0.4
-1
0.15
0.1
0.4
1
%
IO=1mA
Line Regulation
REGLINE
2.0V<=VO < 4.0V
0.02
0.2
0.2
150
30
%
%
%
V
IN=VO+1 to VO+2
4.0V <= Vo
Load Regulation
REGLOAD
OTS
IO=1mA to 300mA
oC
oC
Over Temerature Shutdown
Over Temerature Hysterisis
OTH
ppm/oC
V
O Temperature Coefficient
TC
30
f=1kHz
f=10kHz
f=100kHz
50
IO=100mA
Power Supply Rejection
PSRR
20
dB
C =2.2 F
µ
O
15
f=10Hz to 100kHz
IO=10mA
Output Voltage Noise
EN Input Threshold
EN Input Bias Current
eN
Co=2.2 F
30
Vrms
µ
µ
VEH
VEL
IEH
V
IN=2.7V to 7V
2.0
0
Vin
0.4
0.1
0.5
1
V
V
VIN=2.7V to 7V
V
EN=VIN, VIN=2.7V to 7V
EN=0V, VIN=2.7V to 7V
A
µ
A
µ
A
µ
IEL
V
Shutdown Supply Current
Shutdown Output Voltage
ISD
VIN=5V, VO=0V, VEN<VEL
IO=0.4mA, VEN<VEL
2.5V <=Vo <= 5.0V
1.2V <= Vo < 2.5V
2.5V <=Vo <= 5.0V
1.2V <= Vo < 2.5V
0.5
VO,SD
0
0.4
85
V
Output Under Voltage
Output Over Voltage
VUV
%VO(NOM)
75
115
125
VOV
%VO(NOM)
PG Leakage Current
PG Voltage Rating
PG Voltage Low
ILC
V
PG=7V
O in regulation
SINK=0.4mA
1
7
A
µ
VPG
VOL
V
V
I
0.4
V
Note1:VIN(min)=VOUT+VDROPOUT
5
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8803/8814
n Detailed Description
The AME8803 family of CMOS regulators contain a
PMOS pass transistor, voltage reference, error ampli-
fier, over-current protection, thermal shutdown, and
Power Good detection circuitry.
A third capacitor can be connected between the BY-
PASS pin and GND. This capacitor can be a low cost
Polyester Film variety between the value of 0.001 ~
0.01µF. A larger capacitor improves the AC ripple re-
jection, but also makes the output come up slowly. This
"Soft" turn-on is desirable in some applications to limit
turn-on surges.
The P-channel pass transistor receives data from the
error amplifier, over-current shutdown, and thermal pro-
tection circuits. During normal operation, the error am-
plifier compares the output voltage to a precision refer-
ence. Over-current and Thermal shutdown circuits be-
come active when the junction temperature exceeds
All capacitors should be placed in close proximity to
the pins. A "Quiet" ground termination is desirable.
This can be achieved with a "Star" connection.
o
150 C, or the current exceeds 300mA. During thermal
shutdown, the output voltage remains low. Normal op-
eration is restored when the junction temperature
drops below 120 C.
n Enable
o
The Enable pin normally floats high. When actively,
pulled low, the PMOS pass transistor shuts off, and all
internal circuits are powered down. In this state, the
quiescent current is less than 1µA. This pin behaves
much like an electronic switch.
The AME8803 switches from voltage mode to current
mode when the load exceeds the rated output current.
This prevents over-stress. The AME8803 also incor-
porates current foldback to reduce power dissipation
when the output is short circuited. This feature becomes
active when the output drops below 0.8volts, and re-
duces the current flow by 65%. Full current is restored
when the voltage exceeds 0.8 volts.
n Power Good
The AME8803 includes the Power Good feature. Nor-
mally, Pin 4 is "Floating", however, when the output is
not within ±10% of the specified voltage, it pulls low.
This can occur under the following conditions:
n External Capacitors
1) Input Voltage too low.
2) During Over-Temperature.
3) During Over-Current.
4) If output is pulled up.
The AME8803 is stable with an output capacitor to
ground of 2.2µF or greater. Ceramic capacitors have
the lowest ESR, and will offer the best AC performance.
Conversely, Aluminum Electrolytic capacitors exhibit
the highest ESR, resulting in the poorest AC response.
Unfortunately, large value ceramic capacitors are com-
paratively expensive. One option is to parallel a 0.1µF
ceramic capacitor with a 10µF Aluminum Electrolytic.
The benefit is low ESR, high capacitance, and low over-
all cost.
A second capacitor is recommended between the input
and ground to stabilize Vin. The input capacitor should
be at least 0.1µF to have a beneficial effect.
6
Analog Microelectronics, Inc.
AME8803/8814
300mA CMOS LDO
Load Step ( 1mA-300mA)
Ground Current vs. Input Voltage
45
40
35
30
25
20
15
10
5
CL=2.2
µF
Output
C
IN=2.2µF
85O
C
25O
C
ILoad
0
0
0
1
2
3
4
5
6
7
8
TIME( 20mS/DIV)
Input Voltage (V)
Chip Enable Transient Response
Chip Enable Transient Response
CL=2
RL=10
µ
Ω
F
CL=2
RL=10
CBYP=1000pF
µ
Ω
F
0
0
0
0
TIME ( 1mS/DIV)
TIME ( 1mS/DIV)
Drop Out Voltage vs Load Current
Drop Out Voltage vs Output Voltage
250
200
150
100
50
300
250
200
150
100
50
Top to bottom
V
O U T =2.5V
VO U T =2.8V
V
V
V
V
O U T =3.0V
O U T =3.3V
O U T =3.5V
O U T =3.8V
IL O A D=300mA
IL O A D=200mA
IL O A D=100mA
0
0
0
50
100
150
200
250
300
2.5
2.75
3
3.25
3.5
3.75
4
Load Current (mA)
7
Output Voltage (V)
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8803/8814
Power Supply Rejection Ratio
Power Supply Rejection Ratio
-20
-30
-40
-50
-60
-70
-80
0
-10
-20
-30
-40
-50
-60
-70
-80
100mA
1mA
CL=2.2
µF Tantalum
100mA
CL=2.2
µ
F Tantalum
C
BYP=1000pF
C
BYP =0
100mA
10mA
100mA
10mA
1mA
100
µ
A
100µA
100µA
100µA
1.0E+01
1.0E+03
1.0E+05
1.0E+07
1.0E+01
1.0E+03
1.0E+05
1.0E+07
Frequency (Hz)
Frequency (Hz)
Power Supply Rejection Ratio
Power Supply Rejection Ratio
-10
-10
-20
-30
-40
-50
-60
-70
-80
CBYP = 0
CBYP = 100 pF
CBYP = 0
-20
-30
-40
-50
-60
-70
CBYP = 100 pF
CL = 5.6
Ceramic
IL = 100 mA
µ
F
CL = 10
µ
F
Tantalum
IL = 100 mA
CBYP = 1 nF
CBYP = 1 nF
CBYP = 10 nF
CBYP = 10 nF
-80
1.0E+01
1.0E+02
1.0E+03
1.0E+04
1.0E+05
1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06
Frequency (Hz)
Frequency (Hz)
Overtemperature Shutdown
Short Circuit Response
RL O A D =100
RS H O R T =0.1
Ω
Ω
0
RL O A D =6.6
Ω
0
0
0
TIME (2mS/DIV)
TIME (0.5Sec/DIV)
8
Analog Microelectronics, Inc.
AME8803/8814
300mA CMOS LDO
Noise Measurement
Current Limit Response
RL O A D =3.3
Ω
CL = 2.2µF
NO FILTER
0
0
TIME (2mS/DIV)
TIME (20mS/DIV)
Transient Line Response
Safe Operating Area
300
100
VIN DC = 5.0V
SOT-23-5
CL = 2.2µF
10
1.0
8.0
0.1
Input-Output Voltage Differential (V)
TIME (2mS/DIV)
9
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8803/8814
Stability vs. ESR vs ILOAD
Stability vs. ESR vs ILOAD
10000
1000
100
10
10000
1000
100
10
Unstable Region
Unstable Region
CL=1 F
µ
µ
CL=2 F
Stable Region
Stable Region
1
1
0.1
0.1
Untested Region
Untested Region
0.01
0.01
0
50
100
150
200
0
50
100
150
200
ILOAD (mA)
ILOAD (mA)
Stability vs. ESR vs ILOAD
Stability vs. ESR vs ILOAD
10000
1000
100
10
10000
1000
100
10
Unstable Region
Unstable Region
CL=10 F
µ
CL=3
µ
F
Stable Region
Stable Region
1
1
0.1
0.1
0.01
0.001
Untested Region
Untested Region
0.01
0
50
100
150
200
0
50
100
150
200
ILOAD (mA)
ILOAD (mA)
10
Analog Microelectronics, Inc.
AME8803/8814
300mA CMOS LDO
Quiescent Current vs. Temp.
Load Regulation vs. Temp.
35
34
33
32
31
30
29
28
27
0.58
0.56
0.54
0.52
0.50
0.48
0.46
0.44
0.42
0.40
-45
-5
25
55
85
-45
-5
25
55
85
Temperature (0C)
Temperature (0C)
EN pin LO bias Current vs. Temp.
-0.20
Shut Down Current vs. Temp.
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
-0.25
-0.30
-0.35
-0.40
-0.45
-0.50
-45
-5
25
55
85
-45
-5
25
55
85
Temperature (0C)
Temperature (0C)
PG VOL vs. Temp.
Dropout Voltage vs. Temp.
0.45
0.40
0.35
0.30
0.25
0.20
0.15
220
210
200
190
180
170
160
150
-45
-5
25
55
85
-45
-5
25
55
85
Temperature (0C)
Temperature (0C)
11
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8803/8814
n Package Dimension
SOT-26
MILLIMETERS
INCHES
MIN
SYMBOLS
MIN
1.00
0.00
0.70
0.35
0.08
2.70
1.40
MAX
1.40
0.15
1.25
0.50
0.25
3.10
1.80
MAX
0.0551
0.0591
0.0492
0.0197
0.0098
0.1220
0.0709
A
A1
A2
b
0.0394
0.0000
0.0276
0.0138
0.0031
0.1063
0.0551
C
D
E
e
1.90 BSC
0.0748 BSC
H
L
2.60
0.35
0°
3.00
-
9°
0.1024
0.0138
0°
0.1181
-
9°
1
θ
S1
0.85
1.05
0.0335
0.0413
SOT-26 (Wide)
MILLIMETERS
INCHES
SYMBOLS
A
MIN
1.00
0.00
1.00
0.35
0.10
2.70
1.60
-
MAX
1.30
0.10
1.40
0.50
0.25
3.10
2.00
-
MIN
0.0937
0.000
0.0937
0.0138
0.0039
0.1063
0.0630
-
MAX
0.0512
0.0039
0.0551
0.0197
0.0098
0.1220
0.0787
-
A
1
A2
b
C
D
E
e
H
L
2.60
0.37
1°
3.00
-
0.1024
0.0146
1°
0.1181
-
1
θ
9°
9°
S1
0.85
1.05
0.0335
0.0413
12
www.analogmicro.com
E-Mail: info@analogmicro.com
Life Support Policy:
These products of Analog Microelectronics, Inc. are not authorized for use as critical components in life-
support devices or systems, without the express written approval of the president
of Analog Microelectronics, Inc.
Analog Microelectronics, Inc. reserves the right to make changes in the circuitry and specifications of its
devices and advises its customers to obtain the latest version of relevant information.
Analog Microelectronics, Inc., August 2001
Document: 2006-DS8803/8814-E
Corporate Headquarters
Asia Pacific Headquarters
AME, Inc.
2F, 187 Kang-Chien Road, Nei-Hu District
Taipei 114, Taiwan, R.O.C.
Tel : 886 2 2627-8687
Analog Microelectronics, Inc.
3100 De La Cruz Blvd. Suite 201
Santa Clara, CA. 95054-2046
Tel : (408) 988-2388
Fax: (408) 988-2489
Fax: 886 2 2659-2989
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