AME AME8802OEEV 300ma cmos ldo Datasheet

Analog Microelectronics, Inc.
AME8802
300mA CMOS LDO
n General Description
n Features
The AME8802 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.
l
l
Very Low Dropout Voltage
Guaranteed 300mA Output
Accurate to within 1.5%
30µA Quiescent Current
Over-Temperature Shutdown
Current Limiting
Short Circuit Current Fold-back
Power Good Output Function
Power-Saving Shutdown Mode
Space-Saving SOT-25 (SOT-23-5)
Factory Pre-set Output Voltages
l
Low Temperature Coefficient
l
l
l
l
These rugged devices have both Thermal Shutdown,
and Current Fold-back to prevent device failure under
the "Worst" of operating conditions.
l
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An additional feature is a "Power Good" detector, which
pulls low when the output is out of regulation.
l
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The AME8802 is stable with an output capacitance of
2.2µF or greater.
n Applications
l
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n Functional Block Diagram
l
l
IN
l
OUT
Instrumentation
Portable Electronics
Wireless Devices
Cordless Phones
PC Peripherals
Battery Powered Widgets
Electronic Scales
Overcurrent
Shutdown
n Typical Application
Thermal
Shutdown
EN
IN
IN
V ref x 1 1 0 %
PG
AMP
R1
PG
5V
V ref x 9 0 %
V ref = 1 . 2 1 5 V
**
OUT
AME8802
GND
OUT
EN
C1
C2
1µF
2.2µF
R2
GND
** If output voltage specification is lower than 1.215V, Vref will be
trimmed to 1.2V.
1
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8802
n Pin Configuration
SOT-25 Top View
4
5
1. VIN
2. GND
3. EN
1
2
4. PG
5. OUT
3
n Ordering Information
Part N umber
Marking
Output Voltage
Package
Operating Temp. R ange
AME8802AEEV
AAKww
3.3V
SOT-25
-40 C to +85 C
AME8802BEEV
AALww
3.0V
SOT-25
-40 C to +85 C
AME8802C EEV
AAMww
2.8V
SOT-25
-40 C to +85 C
AME8802D EEV
AANww
2.5V
SOT-25
-40 C to +85 C
AME8802EEEV
AAOww
3.8V
SOT-25
-40 C to +85 C
AME8802FEEV
ABPww
3.6V
SOT-25
-40 C to +85 C
AME8802GEEV
AC Gww
3.5V
SOT-25
-40 C to +85 C
AME8802HEEV
AEHww
2.7V
SOT-25
-40 C to +85 C
AME8802IEEV
AEPww
3.4V
SOT-25
-40 C to +85 C
AME8802JEEV
AGRww
2.85V
SOT-25
-40 C to +85 C
AME8802KEEV
AHTww
3.7V
SOT-25
-40 C to +85 C
AME8802LEEV
AJMww
1.5V
SOT-25
-40 C to +85 C
AME8802MEEV
AJNww
1.8V
SOT-25
-40 C to +85 C
AME8802NEEV
AKQww
2.9V
SOT-25
-40 C to +85 C
AME8802OEEV
AKRww
3.1V
SOT-25
-40 C to +85 C
AME8802TEEV
ARVww
1.2V
SOT-25
-40 C to +85 C
AME8802UEEV
ASD ww
3.2V
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
O
O
O
O
# represents the date code
Please consult AME sales office or authorized Rep./D istributor for other output voltage
and package type availability.
2
Analog Microelectronics, Inc.
AME8802
300mA CMOS LDO
n Absolute Maximum Ratings
Parameter
Maximum
Unit
8
V
Output Current
P D / (VIN - V O)
mA
Output Voltage
GND - 0.3 to VIN + 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
Parameter
Thermal Resistance (θja)
Internal Power Dissipation (P D )
(∆ T = 100oC)
Maximum
SOT-25
260
SOT-25
380
Unit
o
C/W
mW
Maximum Junction Temperature
150
o
C
Maximum Lead Temperature ( 10 Sec)
300
o
C
Caution: Stress above the listed absolute rating may cause permanent damage to the device
3
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8802
n Electrical Specifications
TA = 25 o C unless otherwise noted
Parameter
Symbol
Input Voltage
V IN
Output Voltage Accuracy
VO
Dropout Voltage
V DR OPOU T
Test Condition
Min
IO =1mA
Typ
Ma x
Units
Note 1
7
V
-1.5
1.5
%
1.2V<V O(NOM)<=2.0V
IO=300mA
V O =V ON OM -2.0%
1300
See
chart
2.0V<V O(NOM)<=2.8V
mV
300
2.8V<V O(NOM)
IO
V O>1.2V
300
Current Limit
ILIM
V O>1.2V
300
Short Circuit Current
ISC
V O<0.8V
150
300
mA
Quiescent Current
IQ
IO =0mA
30
50
µA
Ground Pin Current
IGN D
IO =1mA to 300mA
35
Output Current
Line Regulation
Load Regulation
REGLIN E
REG LOAD
IO =1mA
V IN =V O +1 to V O+2
V O < 2.0V
-0.15
2.0V<=V O < 4.0V
-0.1
4.0V <= Vo
IO =1mA to 300mA
mA
450
mA
µA
0.15
%
0.02
0.1
%
-0.4
0.2
0.4
%
-1
0.2
1
%
Over Temerature Shutdown
OTS
150
o
Over Temerature Hysterisis
OTH
30
o
V O Temperature Coefficient
TC
30
Power Supply Rejection
PSRR
Output Voltage Noise
eN
EN Input Threshold
EN Input Bias Current
f=1kHz
50
f=10kHz
20
f=100kHz
15
Co=2.2µF
30
IO=100mA
CO =2.2µF
f=10Hz to 100kHz
IO =10mA
C
C
ppm/ oC
dB
µVrms
V EH
V IN =2.7V to 7V
2.0
Vin
V
V EL
V IN =2.7V to 7V
0
0.4
V
IEH
V EN =V IN , V IN =2.7V to 7V
0.1
µA
0.5
µA
1
µA
0.4
V
IEL
V EN =0V, V IN =2.7V to 7V
Shutdown Supply Current
ISD
V IN =5V, V O =0V, V EN <V EL
Shutdown Output Voltage
V O,SD
IO=0.4mA, V EN <V EL
Output Under Voltage
V UV
Output Over Voltage
V OV
0.5
0
2.5V <=Vo <= 5.0V
85
1.2V <= Vo < 2.5V
75
2.5V <=Vo <= 5.0V
115
1.2V <= Vo < 2.5V
125
%V O(NOM)
%V O(NOM)
PG Leakage Current
ILC
V PG=7V
1
µA
PG Voltage Rating
V PG
V O in regulation
7
V
PG Voltage Low
V OL
ISINK =0.4mA
0.4
V
Note1:V IN (m in)=V OU T+V DR OPOU T
4
400
Analog Microelectronics, Inc.
AME8802
300mA CMOS LDO
n Detailed Description
n Enable
The AME8802 family of CMOS regulators contain a
PMOS pass transistor, voltage reference, error amplifier, over-current protection, thermal shutdown, and
power good function.
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 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 AME8802 switches from voltage mode to current
mode when the load exceeds the rated output current.
This prevents over-stress. The AME8802 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.
n Power Good
The AME8802 includes the Power Good feature. Normally, 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:
1)
2)
3)
4)
Input Voltage too low.
During Over-Temperature.
During Over-Current.
If output is pulled up.
n External Capacitors
The AME8802 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 0.1uF to have a beneficial effect.
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.
5
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8802
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
6
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.
AME8802
300mA CMOS LDO
Power Supply Rejection Ratio
0
-10
PSRR (dB)
100mA
C L =2.2µF Tantalum
C B Y P =0
-20
-30
-40
-50
10mA
100mA
-60
-70
-80
1.0E+01
1mA
100µA
100µA
1.0E+03
1.0E+05
1.0E+07
Frequency (Hz)
Overtemperature Shutdown
I OUT (200mA/DIV)
R L O A D =100Ω
R S H O R T =0.1Ω
VOUT (1V/DIV)
0
0
R L O A D =6.6Ω
VOUT (1V/DIV)
ILOAD (400mA/DIV)
Short Circuit Response
0
0
TIME (0.5Sec/DIV)
TIME (2mS/DIV)
Noise Measurement
IOUT (200mA/DIV)
Current Limit Response
VOUT (1V/DIV)
0
Vo (1mV/ DIV)
R L O A D =3.3Ω
CL = 2.2µF
NO FILTER
0
TIME (2mS/DIV)
TIME (20mS/DIV)
7
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8802
Stability vs. ESR vs ILOAD
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
10
Stable Region
1
0.1
0.1
Untested Region
Untested Region
0.01
0.01
0
50
100
150
0
200
50
100
150
ILOAD (mA)
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
Ω)
ESR (Ω
100
Stable Region
10
0.1
0.1
0.01
Untested Region
0
50
100
Stable Region
1
1
0.01
C L =10µF
100
C L =3µF
10
200
Untested Region
0.001
150
0
200
100
150
200
ILOAD (mA)
ILOAD (mA)
VIN DC = 5.0V
Safe Operating Area
Output Current (mA)
VIN (1V/DIV)
Transient Line Response
VO (1mV/DIV)
50
300
SOT-23-5
100
10
0.1
1.0
Input-Output Voltage Differential (V)
8
TIME (2mS/DIV)
8.0
Analog Microelectronics, Inc.
AME8802
300mA CMOS LDO
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
0.54
0.52
0.50
0.48
0.46
0.44
0.42
0.40
27
-45
-5
25
55
-45
85
0
Temperature ( C)
Shut Down Current vs.Temp.
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
25
55
0
-0.30
-0.35
-0.40
-0.45
-0.50
85
-5
25
55
85
Temperature (0C)
Temperature ( C)
Dropout Voltage vs. Temp.
PG VOL vs.Temp.
220
0.45
210
PG VOL @ 0.4mA (V)
Dropout Voltage @ 300mA
(mV)
85
-0.25
-45
-5
55
-0.20
0.0
-45
25
EN Pin LO Bias Current vs.Temp
EN pin LO bias current (uA)
Shut Down Current (uA)
1.0
-5
Temperature (0C)
200
190
180
170
160
150
0.40
0.35
0.30
0.25
0.20
0.15
-45
-5
25
55
Temperature (0C)
85
-45
-5
25
55
85
Temperature (0C)
9
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8802
n Package Dimension
SOT-25
A
MILLIMETERS
MIN
MAX
1.00
1.45
INCHES
MIN
MAX
0.0394
0.0571
A1
A2
b
C
D
E
0.00
0.70
0.35
0.08
2.70
1.40
0.0000
0.0276
0.0138
0.0031
0.1063
0.0551
e
H
L
1.90 BSC
2.60
3.00
0.30
-
θ1
S1
0
0.85
SYMBOLS
10
°
0.15
1.25
0.55
0.25
3.10
1.80
°
10
1.05
0.0591
0.0492
0.0217
0.0098
0.1220
0.0709
0.07480 BSC
0.1024
0.1181
0.0118
°
0
0.0335
°
10
0.0413
www.analogmicro.com
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-DS8802-E
Corporate Headquarters
Asia Pacific Headquarters
Analog Microelectronics, Inc.
AME, Inc.
3100 De La Cruz Blvd. Suite 201
Santa Clara, CA. 95054-2046
2F, 187 Kang-Chien Road, Nei-Hu District
Taipei 114, Taiwan, R.O.C.
Tel : (408) 988-2388
Fax: (408) 988-2489
Tel : 886 2 2627-8687
Fax : 886 2 2659-2989
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