AME AME8840KEEV 300ma cmos ldo Datasheet

Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
n General Description
n Features
The AME8801/8840 family of positive, linear regulators
feature low quiescent current (30µA typ.) with low dropout voltage, making them ideal for battery applications.
The space-saving SOT-23-5 package is attractive for
"Pocket" and "Hand Held" applications.
These rugged devices have both Thermal Shutdown,
and Current Fold-back to prevent device failure under
the "Worst" of operating conditions.
In applications requiring a low noise, regulated supply,
place a 1000 pF capacitor between Bypass and Ground.
The AME8801 is stable with an output capacitance of
2.2µF or greater.
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
l
Short Circuit Current Fold-back
l
Noise Reduction Bypass Capacitor
l
Power-Saving Shutdown Mode
l
Space-Saving SOT-25 (SOT-23-5) Package
l
Factory Pre-set Output Voltages
l
Low Temperature Coefficient
n Applications
l
l
l
l
n Functional Block Diagram
l
l
IN
OUT
Overcurrent
Shutdown
l
Instrumentation
Portable Electronics
Wireless Devices
Cordless Phones
PC Peripherals
Battery Powered Widgets
Electronic Scales
n Typical Application
Thermal
Shutdown
OUTPUT
INPUT
EN
IN
OUT
AME8801
BYP
BYP
R1
GND
EN
AMP
C1
5V
V ref = 1 . 2 1 5 V
1 µF
C2
C3
1nF
2.2µF
R2
GND
1
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8801/8812/8840
n Pin Configuration
AME8801
SOT-25 Top View
5
AME8801
SOT-26 Top View
4
1
2
1. VIN
2. GND
3. EN
3
4. BYP
5. OUT
AME8812
SOT-25 Top View
6
5
4
5
1
2
3
1
1. OUT_1
2. GND
3. BYP
4. EN
5. VIN
6. OUT_2
1. EN
2. GND
3. VIN
2
AME8840
SOT-25 Top View
4
5
3
1
4. OUT
5. BYP
4
2
1. EN
2. GND
3. BYP
3
4. OUT
5. VIN
n Ordering Information
2
Part Number
Marking
Output Voltage
Package
Operating Temp. Range
AME8801AEEV
AAFww
3.3V
SOT-25
-40 C to +85 C
AME8801BEEV
AAGww
3.0V
SOT-25
-40 C to +85 C
AME8801CEEV
AAHww
2.8V
SOT-25
-40 C to +85 C
AME8801DEEV
AAIww
2.5V
SOT-25
-40 C to +85 C
AME8801EEEV
AAJww
3.8V
SOT-25
-40 C to +85 C
AME8801FEEV
ABOww
3.6V
SOT-25
-40 C to +85 C
AME8801GEEV
ACFww
3.5V
SOT-25
-40 C to +85 C
AME8801HEEV
AEGww
2.7V
SOT-25
-40 C to +85 C
AME8801IEEV
AEOww
3.4V
SOT-25
-40 C to +85 C
AME8801JEEV
AGQww
2.85V
SOT-25
-40 C to +85 C
AME8801KEEV
AHSww
3.7V
SOT-25
-40 C to +85 C
AME8801LEEV
AJOww
1.5V
SOT-25
-40 C to +85 C
AME8801MEEV
AJPww
1.8V
SOT-25
-40 C to +85 C
AME8801NEEV
AKOww
2.9V
SOT-25
-40 C to +85 C
AME8801OEEV
AKPww
3.1V
SOT-25
-40 C to +85 C
AME8801SEEV
AQXww
5.0V
SOT-25
-40 C to +85 C
AME8801JEEY
ARUww
2.85V
SOT-26
-40 C to +85 C
Please consult AME sales office or authorized Rep./Distributor for other output
voltage and package type availability.
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
n Ordering Information
Part Number
Output Voltage
Package
Operating Temp. Range
AME8812AEEV
3.3V
SOT-25
-40 C to +85 C
AME8812BEEV
3.0V
SOT-25
-40 C to +85 C
AME8812CEEV
2.8V
SOT-25
-40 C to +85 C
AME8812DEEV
2.5V
SOT-25
-40 C to +85 C
AME8812EEEV
3.8V
SOT-25
-40 C to +85 C
AME8812FEEV
3.6V
SOT-25
-40 C to +85 C
AME8812GEEV
3.5V
SOT-25
-40 C to +85 C
AME8812HEEV
2.7V
SOT-25
-40 C to +85 C
AME8812IEEV
3.4V
SOT-25
-40 C to +85 C
AME8812JEEV
2.85V
SOT-25
-40 C to +85 C
AME8812KEEV
3.7V
SOT-25
-40 C to +85 C
AME8812LEEV
1.5V
SOT-25
-40 C to +85 C
AME8812MEEV
1.8V
SOT-25
-40 C to +85 C
AME8812NEEV
2.9V
SOT-25
-40 C to +85 C
AME8812OEEV
3.1V
SOT-25
-40 C to +85 C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Please consult AME sales office or authorized Rep./Distributor for other output
voltage and package type availability.
3
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8801/8812/8840
n Ordering Information
Part Number
Marking
Output Voltage
Package
Operating Temp. Range
AME8840AEEV
ALCww
3.3V
SOT-25
-40 C to +85 C
AME8840BEEV
ALDww
3.0V
SOT-25
-40 C to +85 C
AME8840CEEV
ALEww
2.8V
SOT-25
-40 C to +85 C
AME8840DEEV
ALFww
2.5V
SOT-25
-40 C to +85 C
AME8840EEEV
ALGww
3.8V
SOT-25
-40 C to +85 C
AME8840FEEV
ALHww
3.6V
SOT-25
-40 C to +85 C
AME8840GEEV
ALIww
3.5V
SOT-25
-40 C to +85 C
AME8840HEEV
ALJww
2.7V
SOT-25
-40 C to +85 C
AME8840IEEV
ALKww
3.4V
SOT-25
-40 C to +85 C
AME8840JEEV
ALLww
2.85V
SOT-25
-40 C to +85 C
AME8840KEEV
ALMww
3.7V
SOT-25
-40 C to +85 C
AME8840LEEV
ALNww
1.5V
SOT-25
-40 C to +85 C
AME8840MEEV
ALOww
1.8V
SOT-25
-40 C to +85 C
AME8840NEEV
ALPww
2.9V
SOT-25
-40 C to +85 C
AME8840OEEV
ALQww
3.1V
SOT-25
-40 C to +85 C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Please consult AME sales office or authorized Rep./Distributor for other output
voltage and package type availability.
4
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
n Absolute Maximum Ratings
Parameter
Maximum
Unit
8
V
Output Current
P D / (V IN - V O )
mA
Output Voltage
GND - 0.3 to V IN + 0.3
V
Input Voltage
ESD Classification
B
n Recommended Operating Conditions
Parameter
Rating
Ambient Temperature Range
Junction Temperature
Unit
-40 to +85
o
C
-40 to +125
o
C
n Thermal Information
Param ete r
Thermal Resistance (q ja )
Internal Power Dissipation (P D )
(DT = 100o C)
Thermal Resistance (q ja )
Internal Power Dissipation (P D )
(DT = 100o C)
Maximum Junction Temperature
Ma x im um
SOT-25
260
SOT-25
380
SOT-26
260
SOT-26
380
150
Unit
o
C/W
mW
o
C/W
mW
o
C
Caution: Stress above the listed absolute rating may cause permanent damage to the device
5
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8801/8812/8840
n Electronic Specifications
TA = 25 o C unless otherwise noted
Parameter
Symbol
Input Voltage
VIN
Output Voltage Accuracy
VO
Dropout Voltage
VDROPOUT
Test Condition
Min
IO=1mA
Typ
Max
Units
Note 1
7
V
-1.5
1.5
%
1.2V<VO(NOM)<=2.0V
IO=300mA
VO=VONOM -2.0%
1300
See
chart
2.0V<VO(NOM)<=2.8V
mV
300
2.8V<VO(NOM)
Output Current
IO
VO>1.2V
300
Current Limit
ILIM
VO>1.2V
300
Short Circuit Current
ISC
VO<0.8V
150
300
mA
Quiescent Current
IQ
IO=0mA
30
50
µA
Ground Pin Current
IGND
IO=1mA to 300mA
35
Line Regulation
Load Regulation
Over Temerature Shutdown
REGLINE
REGLOAD
IO=1mA
VIN=VO+1 to VO+2
VO < 2.0V
-0.15
2.0V<=VO < 4.0V
-0.1
4.0V <= Vo
IO=1mA to 300mA
mA
450
0.02
0.1
%
-0.4
0.2
0.4
%
-1
0.2
1
%
150
o
o
OTH
30
VO Temperature Coefficient
TC
30
Output Voltage Noise
PSRR
eN
CO=2.2µF
f=10Hz to 100kHz
IO=10mA
µA
%
OTS
f=1kHz
50
f=10kHz
20
f=100kHz
15
Co=2.2µF
30
IO=100mA
mA
0.15
Over Temerature Hysterisis
Power Supply Rejection
C
C
ppm/oC
dB
µVrms
VEH
VIN=2.7V to 7V
2.0
Vin
V
VEL
VIN=2.7V to 7V
0
0.4
V
IEH
VEN=VIN, VIN=2.7V to 7V
0.1
µA
IEL
VEN=0V, VIN=2.7V to 7V
0.5
µA
Shutdown Supply Current
ISD
VIN=5V, VO=0V, VEN<VEL
1
µA
Shutdown Output Voltage
VO,SD
IO=0.4mA, VEN<VEL
0.4
V
EN Input Threshold
EN Input Bias Current
Note1:VIN(min)=VOUT+VDROPOUT
6
400
0.5
0
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
n Detailed Description
The AME8801/8840 family of CMOS regulators contain
a PMOS pass transistor, voltage reference, error amplifier, over-current protection, and thermal shutdown.
The P-channel pass transistor receives data from the
error amplifier, over-current shutdown, and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current and Thermal shutdown circuits become active when the junction temperature exceeds
150oC, or the current exceeds 300mA. During thermal
shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops
below 120oC.
The AME8801/8840 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The AME8801/8840
also incorporates current foldback to reduce power dissipation when the output is short circuited. This feature
becomes active when the output drops below 0.8volts,
and reduces the current flow by 65%. Full current is
restored when the voltage exceeds 0.8 volts.
A third capacitor can be connected between the BYPASS 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 rejection, but also makes the output come up slowly. This
"Soft" turn-on is desirable in some applications to limit
turn-on surges.
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.
n Enable
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.
n External Capacitors
The AME8801/8840 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 comparatively 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 overall 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.
7
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8801/8812/8840
Load Step ( 1mA-300mA)
Ground Current vs. Input Voltage
Vo(5mV/DIV)
45
35
85 O C
30
Output
C L =2.2µF
C I N =2.2µF
25
25 O C
20
IL(200mA/DIV)
µA)
Ground Current (µ
40
15
10
5
IL o a d
0
0
0
1
2
3
4
5
6
7
TIME( 20mS/DIV)
8
Input Voltage (V)
C L =2µF
R L =10Ω
C B Y P =1000pF
Enable (2V/DIV)
Chip Enable Transient Response
Output (1V/DIV)
0
C L =2µF
R L =10Ω
0
Output (1V/DIV)
Enable (2V/DIV)
Chip Enable Transient Response
0
0
TIME ( 1mS/DIV)
TIME ( 1mS/DIV)
Drop Out Voltage vs Load Current
Drop Out Voltage vs Output Voltage
250
Dropout Voltage (mV)
Drop Out Voltage (mV)
300
250
200
IL O A D= 3 0 0 m A
150
IL O A D = 2 0 0 m A
100
IL O A D = 1 0 0 m A
50
200
150
100
50
0
0
2.5
8
Top to bottom
V O U T =2.5V
V O U T =2.8V
V O U T =3.0V
V O U T =3.3V
V O U T =3.5V
V O U T =3.8V
2.75
3
3.25
3.5
Output Voltage (V)
3.75
4
0
50
100
150
200
Load Current (mA)
250
300
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
Power Supply Rejection Ratio
Power Supply Rejection Ratio
-20
0
-30
-10
100mA
C L =2.2µF Tantalum
C B Y P =1000pF
-20
-40
-50
PSRR (dB)
PSRR (dB)
1mA
100mA
-60
100mA
C L =2.2µF Tantalum
C B Y P =0
-30
-40
-50
10mA
100mA
-60
10mA
-70
100µA
-70
100µA
-80
1.0E+01
-80
1.0E+01
1.0E+03
1.0E+05
1.0E+07
Frequency (Hz)
Power Supply Rejection Ratio
C L = 10 µF
Tantalum
I L = 100 mA
-30
PSRR ( dB)
-40
-50
-60
C B Y P = 1 nF
-70
C BYP = 0
-40
C B Y P = 100 pF
C L = 5.6 µF
Ceramic
I L = 100 mA
-50
-60
C B Y P = 1 nF
-70
C B Y P = 10 nF
-80
1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06
C B Y P = 10 nF
-80
1.0E+01
Frequency (Hz)
1.0E+02
1.0E+03
1.0E+04
1.0E+05
Frequency (Hz)
Overtemperature Shutdown
I OUT (200mA/DIV)
Short Circuit Response
ILOAD (400mA/DIV)
1.0E+07
Power Supply Rejection Ratio
-20
R L O A D =100Ω
R S H O R T =0.1Ω
0
R L O A D =6.6Ω
VOUT (1V/DIV)
0
VOUT (1V/DIV)
PSRR ( dB)
-30
1.0E+05
-10
C BYP = 0
C B Y P = 100 pF
1.0E+03
Frequency (Hz)
-10
-20
1mA
100µA
100µA
0
0
TIME (2mS/DIV)
TIME (0.5Sec/DIV)
9
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8801/8812/8840
Noise Measurement
IOUT (200mA/DIV)
Current Limit Response
R L O A D =3.3Ω
CL = 2.2µF
NO FILTER
Vo (1mV/ DIV)
VOUT (1V/DIV)
0
0
TIME (2mS/DIV)
TIME (20mS/DIV)
Transient Line Response
VO (1mV/DIV)
VIN DC = 5.0V
CL = 2.2µF
Output Current (mA)
VIN (1V/DIV)
Safe Operating Area
300
SOT-23-5
100
10
0.1
TIME (2mS/DIV)
10
1.0
Input-Output Voltage Differential (V)
8.0
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
Stability vs. ESR vs I LOAD
10000
Stability vs. ESR vs I LOAD
10000
Unstable Region
Unstable Region
1000
1000
C L =1µF
10
Stable Region
1
C L =2µF
100
Ω)
ESR (Ω
ESR (Ω
Ω)
100
0.1
10
Stable Region
1
0.1
Untested Region
Untested Region
0.01
0.01
0
50
100
150
0
200
50
ILOAD (mA)
150
200
ILOAD (mA)
Stability vs. ESR vs I LOAD
Stability vs. ESR vs I LOAD
10000
10000
Unstable Region
Unstable Region
1000
1000
Ω)
ESR (Ω
10
Stable Region
1
C L =10µF
100
C L =3µF
100
Ω)
ESR (Ω
100
10
Stable Region
1
0.1
0.1
0.01
Untested Region
0.01
0
50
100
ILOAD (mA)
150
Untested Region
0.001
200
0
50
100
150
200
ILOAD (mA)
11
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8801/8812/8840
Load Regulation vs. Temp.
35
0.58
34
0.56
Load Regulation (%)
Quiescent Current @ 5V (uA)
Quiescent Current vs.Temp.
33
32
31
30
29
28
27
0.54
0.52
0.50
0.48
0.46
0.44
0.42
0.40
-45
-5
25
55
85
-45
Temperature (0C)
0.9
0.8
Dropout Voltage @ 300mA
(mV)
Shut Down Current (uA)
1.0
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
-5
25
55
85
0
Temperature ( C)
EN pin LO bias current (uA)
EN Pin LO Bias Current vs. Temp.
-0.20
-0.25
-0.30
-0.35
-0.40
-0.45
-0.50
-45
-5
25
55
0
12
Temperature ( C)
25
55
85
Dropout Voltage vs. Temp.
Shut Down Current vs. Temp.
-45
-5
Temperature (0C)
85
220
210
200
V O U T =3V
190
180
170
160
150
-45
-5
25
55
Temperature ( 0 C)
85
Analog Microelectronics, Inc.
AME8801/8812/8840
300mA CMOS LDO
n Package Dimension
SOT-25
A
MILLIMETERS
MIN
MAX
1.00
1.45
INCHES
MIN
MAX
0.0394
0.0571
A1
0.00
0.15
0.0000
0.0591
A2
b
C
D
0.70
0.35
0.08
2.70
1.25
0.55
0.25
3.10
0.0276
0.0138
0.0031
0.1063
0.0492
0.0217
0.0098
0.1220
E
e
H
L
1.40
1.80
1.90 BSC
0.0551
0.0709
0.07480 BSC
2.60
0.30
0.1024
0.0118
θ1
S1
0
0.85
SYMBOLS
°
3.00
°
10
1.05
°
0
0.0335
0.1181
°
10
0.0413
SOT-26
MILLIMETERS
MIN
MAX
1.00
1.40
INCHES
MIN
MAX
0.0394
0.0551
A2
0.00
0.70
0.15
1.25
0.0000
0.0276
0.0591
0.0492
b
C
0.35
0.08
0.50
0.25
0.0138
0.0031
0.0197
0.0098
D
2.70
3.10
0.1063
0.1220
E
e
H
1.40
1.80
0.0551
0.0709
1.90 BSC
2.60
3.00
0.0748 BSC
0.1024
0.1181
L
0.35
0.0138
θ1
S1
0
0.85
SYMBOLS
A
A1
°
°
9
1.05
°
0
0.0335
°
9
0.0413
13
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E-Mail: [email protected]
Life Support Policy:
These products of Analog Microelectronics, Inc. are not authorized for use as critical components in lifesupport 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-DS8801/8812/8840-E
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Analog Microelectronics, Inc.
AME, Inc.
3100 De La Cruz Blvd. Suite 201
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