AME AME8841GEHA 600ma cmos ldo Datasheet

Analog Microelectronics, Inc.
AME8841
600mA CMOS LDO
n General Description
n Features
The AME8841 linear regulator features low quiescent current (30µA typ.) with low dropout voltage, making it ideal
for battery applications. The space-saving SO-8 package is attractive for "Pocket” and "Hand Held" applications.
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These rugged devices have both Thermal Shutdown,
and Current Fold-back to prevent device failure under
the "Worst" of operating conditions.
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The AME8841 is stable with an output capacitance of
2.2µF or greater.
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n Pin Configuration
n Applications
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Very Low Dropout Voltage
Guaranteed 600mA Output
Accurate to within 1.5%
30µA Quiescent Current
Over-Temperature Shutdown
Current Limiting
Short Circuit Current Fold-back
Power-Saving Shutdown Mode
Space-Saving SO-8 Package
Many fixed output voltages available
Low Temperature Coefficient
Instrumentation
Portable Electronics
Wireless Devices
Cordless Phones
PC Peripherals
Battery Powered Widgets
Electronic Scales
SO-8 Top View
NC
OUT
IN
GND
AME
8841
EN
NC
NC
OUT
n Functional Block Diagram
IN
OUT
n Typical Application
Overcurrent
Shutdown
IN
IN
Thermal
Shutdown
AME8841
GND
EN
5V
OUT
OUT
EN
C1
C3
1µF
2.2µF
R1
AMP
V ref =1.215V
R2
GND
1
Analog Microelectronics, Inc.
600mA CMOS LDO
AME8841
n Absolute Maximum Ratings:
Parameter
Maximum
Unit
8
V
PD / (VIN - VO)
A
GND - 0.3 to V IN + 0.3
V
Input Voltage
Output Current
Input, Output Voltage
ESD Classification
B
n Recomended Operating Conditions:
Parameter
Ambient Temperature Range
Junction Temperature
Rating
Unit
-40 to +85
o
-40 to +125
o
C
C
n Thermal Paramters
Parameter
Thermal Resistance (θja)
Internal Power Dissipation (PD )
(∆ T = 100oC)
Maximum
123.7
810
Unit
o
C/W
mW
Maximum Junction Temperature
150
o
Maximum Lead Temperature ( 10 Sec)
300
o
C
C
Caution: Stress above the listed absolute rating may cause permanent damage to the device
2
Analog Microelectronics, Inc.
AME8841
600mA CMOS LDO
n Ordering Information
P art N um ber
A M E 8841A E HA
A M E 8841B E HA
A M E 8841CE HA
A M E 8841DE HA
A M E 8841E E HA
A M E 8841FE HA
A M E 8841GE HA
A M E 8841HE HA
A M E 8841IE HA
A M E 8841JE HA
A M E 8841K E HA
A M E 8841LE HA
A M E 8841M E HA
A M E 8841NE HA
A M E 8841OE HA
A M E 8841RE HA
Marking
8841
A E HA
y y ww
8841
B E HA
y y ww
8841
CE HA
y y ww
8841
DE HA
y y ww
8841
E E HA
y y ww
8841
FE HA
y y ww
8841
GE HA
y y ww
8841
HE HA
y y ww
8841
IE HA
y y ww
8841
JE HA
y y ww
8841
K E HA
y y ww
8841
LE HA
y y ww
8841
M E HA
y y ww
8841
NE HA
y y ww
8841
OE HA
y y ww
8841
RE HA
y y ww
Output
P ackage
Operating Temp.
3.3V
S O-8
-40 O C to + 85 O C
3.0V
S O-8
-40 O C to + 85 O C
2.8V
S O-8
-40 O C to + 85 O C
2.5V
S O-8
-40 O C to + 85 O C
3.8V
S O-8
-40 O C to + 85 O C
3.6V
S O-8
-40 O C to + 85 O C
3.5V
S O-8
-40 O C to + 85 O C
2.7V
S O-8
-40 O C to + 85 O C
3.4V
S O-8
-40 O C to + 85 O C
2.85V
S O-8
-40 O C to + 85 O C
3.7V
S O-8
-40 O C to + 85 O C
1.5V
S O-8
-40 O C to + 85 O C
1.8V
S O-8
-40 O C to + 85 O C
2.9V
S O-8
-40 O C to + 85 O C
3.1V
S O-8
-40 O C to + 85 O C
2.65V
S O-8
-40 O C to + 85 O C
P lease c ons ult A M E s ales office or authorized Rep./Distributor for other output voltage
and pac kage type availability .
3
Analog Microelectronics, Inc.
600mA CMOS LDO
AME8841
n Electrical 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
%
1.4V<VO(NOM)<=2.0V
IO=600mA
VO=VONOM -2.0%
1400
See
chart
2.0V<VO(NOM)<=2.8V
2.8V<VO(NOM)
mV
600
IO
VO>1.2V
600
Current Limit
ILIM
VO>1.2V
600
Short Circuit Current
ISC
VO<0.8V
300
600
mA
Quiescent Current
IQ
IO=0mA
30
50
µA
Ground Pin Current
IGND
IO=1mA to 600mA
30
50
µA
0.15
%
0.1
%
Output Current
Line Regulation
REGLINE
IO=5mA
VIN=VO+1 to VO+2
VO < 2.0V
-0.15
4.0V > VO >= 2.0V
-0.1
VO >= 4.0V
-0.4
mA
800
0.02
mA
0.4
%
Over Temerature Shutdown
OTS
150
o
Over Temerature Hysterisis
OTH
30
o
VO Temperature Coefficient
TC
30
Power Supply Rejection
Output Voltage Noise
EN Input Threshold
EN Input Bias Current
Shutdown Supply Current
Note1:VIN(min)=VOUT+VDROPOUT
4
800
PSRR
eN
f=1kHz
50
f=10kHz
20
f=100kHz
15
Co=2.2µF
30
IO=100mA
CO=2.2µF
f=10Hz to 100kHz
IO=10mA,CBYP=0µF
C
C
ppm/oC
dB
mVrms
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
ISD
VIN=5V, VO=0V, VEN<VEL
1
µA
0.5
Analog Microelectronics, Inc.
AME8841
600mA CMOS LDO
n Detailed Description
n Enable
The AME8841 family of CMOS regulators contain a
PMOS pass transistor, voltage reference, error amplifier,
over-current protection, and thermal shutdown.
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 600mA. During thermal
shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops
below 110oC.
The AME8841 switches from voltage mode to current mode
when the load exceeds the rated output current. This
prevents over-stress. The AME8841 also incorporates
current foldback to reduce power dissipation when the
output is short circuited. This feature becomes active
when the output drops below 0.8 volts, and reduces the
current flow by 65%. Full current is restored when the
voltage exceeds 0.8 volts.
n External Capacitors
The AME8841 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.
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.
600mA CMOS LDO
AME8841
Load Step ( 1mA-600mA)
Ground Current vs. Input Voltage
Vo(10mV/DIV)
45
35
85 O C
30
25
Output
C L =2.2µF
CIN=2.2µF
25 O C
20
IL(200mA/DIV)
µA)
Ground Current (µ
40
15
10
5
0
0
1
2
3
4
5
6
7
IL o a d
0
8
TIME ( 20mS/DIV)
Input Voltage (V)
Drop Out Voltage vs. Output Voltage
Power Supply Rejection Ratio
0
-10
0.25
IL O A D= 6 0 0 m A
-20
0.2
PSRR (dB)
Drop Out Voltage (V)
0.3
0.15
0.1
-30
-40
-50
10mA
100mA
-70
0
2
2.5
3
3.5
4
4.5
5
5.5
Output Voltage (V)
600
8807AEHA
8841AEHA
100
10
0.1
-80
1.0E+01
100 µA
1.0E+03
100 µA
1.0E+05
Frequency (Hz)
Safe Operating Area
Output Current (mA)
100mA
-60
0.05
1.0
Input-Output Voltage Differential (V)
6
C L =2.2 µF Tantalum
C B Y P =0
8.0
1mA
1.0E+07
Analog Microelectronics, Inc.
AME8841
600mA CMOS LDO
Noise Measurement
(200mA/DIV)
Overtemperature Shutdown
OUT
0
R LOAD =6.6Ω
VOUT (1V/DIV)
I
Vo (1mV/ DIV)
CL = 2.2µF
NO FILTER
0
TIME (0.5Sec/DIV)
TIME (20mS/DIV)
I OUT (200mV/DIV)
Short Circuit Response
C L O A D =2.2µF
C I N =1.0µF
R L O A D =3.3Ω
V O U T N O M =3.3V
TIME (2mS/DIV)
TIME (2mS/DIV)
Line Transient Response
0
VIN(1V/DIV)
0
VOUT (10mV/DIV)
C L =2µF
R L =10Ω
Output (1V/DIV)
Enable (2V/DIV)
Chip Enable Transient Response
TIME ( 1mS/DIV)
C L O A D =2.2µF
C IN = 1µF
R L O A D < 1 0 0 mΩ
V OUT (1V/DIV)
IOUT (200mA/DIV) VOUT (1V/DIV)
Current Limit Response
C L O A D =2.2µF
IL O A D = 1 m A
V O U T D C =3.3V
V I N D C =4.5V
TIME (200mS/DIV)
7
Analog Microelectronics, Inc.
600mA CMOS LDO
AME8841
EN pin vs. Temp.
Quiescent Current vs.Temp.
-0.20
EN pin LO bias current (uA)
Quiescent Current (uA)
40
38
36
34
32
30
28
26
-20
0
20
40
60
Temperature (0C)
-0.25
-0.30
-0.35
-0.40
-0.45
-0.50
80
-20
20
80
Dropout Voltage @ 600mA (mV)
500
0.60
0.55
0.50
0.45
0.40
0.35
0.30
-20
0
20
40
60
480
460
440
420
400
380
360
-20
80
0
Temperature (0C)
20
40
60
80
Tem perature (0C)
Vout vs. Temp.
Load Regulation vs. Temp.
2.660
0.55
2.655
Load Regulation (%)
Vout @ Vin=Vout+2V (V)
60
Dropout Voltage vs. Temp.
0.65
2.650
2.645
2.640
2.635
2.630
0.50
0.45
0.40
0.35
2.625
2.620
-20
0
20
40
60
0
Temperature ( C)
8
40
Tem perature (0C)
Shut Down Current vs.
Temp.
Shut Down Current (uA)
0
80
0.30
-20
0
20
40
Tem perature (0C)
60
80
Analog Microelectronics, Inc.
AME8841
600mA CMOS LDO
n Package Dimension
SO-8
MILLIMETERS
MIN
MAX
1.35
1.75
0.10
0.25
INCHES
MIN
MAX
0.053
0.069
0.004
0.010
—
0.33
—
0.51
—
0.013
—
0.020
C
D
E
0.19
4.80
3.80
0.25
5.00
4.00
0.007
0.189
0.150
0.010
0.1970
0.157
e
—
5.80
0.40
—
6.20
1.27
0.10
—
0.228
0.016
—
0.244
0.050
0.004
SYMBOLS
A
A1
A2
B
θ
H
L
y
θ
—
°
0
°
8
°
0
°
8
9
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-DS8841-C
Corporate Headquarters
Asia Pacific Headquarters
Analog Microelectronics, Inc.
AME, Inc.
3100 De La Cruz Blvd. Suite 201
Santa Clara, CA. 95054-2046
2F, NO. 187 Kang-Chien Road, Nei-Hu Dist.,
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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