AME AME8807

Analog Microelectronics, Inc.
AME8807
600mA CMOS LDO
n General Description
n Features
The AME8807 family of positive, linear regulators feature low quiescent current (30µA typ.) with low dropout
voltage, making them 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 AME8807 is stable with an output capacitance of
2.2µF or greater.
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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
User Adjustable Output Voltages
Low Temperature Coefficient
n Applications
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n Functional Block Diagram
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IN
Instrumentation
Portable Electronics
Wireless Devices
Cordless Phones
PC Peripherals
Battery Powered Widgets
Electronic Scales
OUT
Overcurrent
Shutdown
n Typical Application
Thermal
Shutdown
EN
IN
V ref x110%
PG
C1
AMP
ADJ
5V
OUT
OUT
EN
IN AME8807
PG
GND ADJ
C2
R1
1µF
100p
C3
2.2µF
R2
V ref x90%
V ref = 1 . 2 1 5 V
GND
VOUT = 1.215 ( R1/R2 +1 )
C2 is unnecessary if R1 or R2 < 20kohms
1
Analog Microelectronics, Inc.
600mA CMOS LDO
AME8807
n Pin Configuration
SO-8 Top View
SO-8 Top View
OUT
IN
GND
ADJ
NC
GND
GND
NC
ADJ
NC
EN
IN
OUT
GND
GND
EN
AME8807AEHA
AME8807BEHA
n Ordering Information
Part Number
Marking
Output Voltage Package
Operating Temp. Range
AME8807AEHA
8807
AEHA
yyww
Adjustable
SO-8
-40O C to +85O C
AME8807BEHA
8807
BEHA
yyww
Adjustable
SO-8
-40O C to +85O C
Please consult AME sales office or authorized Rep./Distributor for other package type availability.
2
Analog Microelectronics, Inc.
AME8807
600mA CMOS LDO
n Absolute Maximum Ratings:
Parameter
Maximum
Unit
8
V
Output Current
PD / (VIN - VO)
A
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
-40 to +125
o
C
C
n Thermal Information
Parameter
Package
8807AEHA
Maximum
Unit
124
Thermal Resistance (θja)
o
C/W
8807BEHA
124
8807AEHA
810
Internal Power Dissipation (PD ) (∆ T = 100oC)
mW
8807BEHA
810
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
3
Analog Microelectronics, Inc.
600mA CMOS LDO
AME8807
n Electrical Specifications
TA = 25 o C unless otherwise noted
Parameter
Symbol
Input Voltage
VIN
Output Voltage Accuracy
VO
Dropout Voltage
VDROPOUT
Test Condition
IO=1mA
Min
Typ
Max
Units
Note 1
8
V
-1.5
1.5
%
1.5V<VO(NOM)<=2.0V
IO=600mA
VO=VONOM -2.0%
1400
See
chart
2.0V<VO(NOM)<=2.8V
2.8V<VO(NOM)<3.8V
mV
600
Output Current
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
%
0.02
0.1
%
0.2
1
%
Line Regulation
REGLINE
Load Regulation
REGLOAD
Over Temerature Shutdown
IO=5mA
VO < 2.0V
VIN=VO+1 to VO+2
VO >= 2.0V
IO=1mA to 600mA
OTS
mA
800
o
o
OTH
30
VO Temperature Coefficient
TC
30
PSRR
IO=100mA
CO=2.2µF
f=10Hz to 100kHz
IO=10mA
mA
150
Over Temerature Hysterisis
Power Supply Rejection
f=1kHz
50
f=10kHz
20
f=100kHz
15
Co=2.2µF
30
Co=100µF
20
C
C
ppm/oC
dB
µVrms
Output Voltage Noise
eN
ADJ Input Bias Current
IADJ
0.02
0.04
µA
ADJ Reference Voltage
VREF
1.203 1.215 1.227
V
EN Input Threshold
EN Input Bias Current
Shutdown Supply Current
Note1:VIN(min)=VOUT+VDROPOUT
4
800
VEH
VIN=2.7V to 8V
2.0
Vin
V
VEL
VIN=2.7V to 8V
0
0.4
V
IEH
VEN=VIN, VIN=2.7V to 8V
0.1
µA
IEL
VEN=0V, VIN=2.7V to 8V
0.5
µA
ISD
VIN=5V, VO=0V, VEN<VEL
1
µA
0.5
Analog Microelectronics, Inc.
AME8807
600mA CMOS LDO
n Detailed Description
n Enable
The AME8807 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 120oC.
The AME8807 switches from voltage mode to current
mode when the load exceeds the rated output current.
This prevents over-stress. The AME8807 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 ADJ
The ADJ pin is the positive input to the error amplifier
which, due to the pmos pass element inversion, means
it is actually the negative input of the LDO feedback loop.
The feedback works to keep the voltage at the ADJ pin
1.215V with respect to ground. Since the internal circuitry at the ADJ pin is essentially an ESD protected
CMOS gate the input current at the ADJ pin is virtually
zero.
n External Capacitors
The AME8807 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
AME8807
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
IL o a d
0
0
0
1
2
3
4
5
6
7
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
8807BEHA
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.
AME8807
600mA CMOS LDO
Noise Measurement
I OUT (200mA/DIV)
Overtemperature Shutdown
0
R L O A D =6.6Ω
VOUT (1V/DIV)
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
AME8807
n External Resistor Divider Table
8
R1(kohm)
Vout
1.00
2.00
1.30
1.35
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80
1.85
1.90
1.95
2.00
2.05
2.10
2.15
2.20
2.25
2.30
2.35
2.40
2.45
2.50
2.55
2.60
2.65
2.70
2.75
2.80
2.85
2.90
2.95
3.00
3.05
3.10
14.29
9.00
6.57
5.17
4.26
3.63
3.16
2.79
2.51
2.27
2.08
1.91
1.77
1.65
1.55
1.46
1.37
1.30
1.23
1.17
1.12
1.07
1.03
0.98
0.95
0.91
0.88
0.85
0.82
0.79
0.77
0.74
0.72
0.70
0.68
0.66
0.64
28.59
18.00
13.14
10.34
8.53
7.25
6.31
5.59
5.01
4.54
4.15
3.83
3.55
3.31
3.10
2.91
2.75
2.60
2.47
2.35
2.24
2.14
2.05
1.97
1.89
1.82
1.75
1.69
1.64
1.58
1.53
1.49
1.44
1.40
1.36
1.32
1.29
3.00
4.00
5.00
6.00
7.00
8.00
R2(kohm)=(1.215*R1(kohm))/(Vout-1.215)
42.88
27.00
19.70
15.51
12.79
10.88
9.47
8.38
7.52
6.81
6.23
5.74
5.32
4.96
4.64
4.37
4.12
3.90
3.70
3.52
3.36
3.21
3.08
2.95
2.84
2.73
2.63
2.54
2.45
2.37
2.30
2.23
2.16
2.10
2.04
1.99
1.93
57.18
36.00
26.27
20.68
17.05
14.51
12.62
11.17
10.02
9.08
8.31
7.65
7.09
6.61
6.19
5.82
5.49
5.20
4.93
4.70
4.48
4.28
4.10
3.94
3.78
3.64
3.51
3.39
3.27
3.17
3.07
2.97
2.88
2.80
2.72
2.65
2.58
71.47
45.00
32.84
25.85
21.32
18.13
15.78
13.97
12.53
11.36
10.38
9.57
8.87
8.27
7.74
7.28
6.86
6.50
6.17
5.87
5.60
5.35
5.13
4.92
4.73
4.55
4.39
4.23
4.09
3.96
3.83
3.72
3.61
3.50
3.40
3.31
3.22
85.76
54.00
39.41
31.02
25.58
21.76
18.94
16.76
15.03
13.63
12.46
11.48
10.64
9.92
9.29
8.73
8.24
7.80
7.40
7.04
6.72
6.42
6.15
5.90
5.67
5.46
5.26
5.08
4.91
4.75
4.60
4.46
4.33
4.20
4.08
3.97
3.87
100.06
63.00
45.97
36.19
29.84
25.39
22.09
19.55
17.54
15.90
14.54
13.39
12.42
11.57
10.83
10.19
9.61
9.10
8.63
8.22
7.84
7.49
7.18
6.89
6.62
6.37
6.14
5.93
5.73
5.54
5.37
5.20
5.05
4.90
4.76
4.63
4.51
114.35
72.00
52.54
41.36
34.11
29.01
25.25
22.34
20.04
18.17
16.62
15.31
14.19
13.22
12.38
11.64
10.98
10.40
9.87
9.39
8.96
8.56
8.20
7.87
7.56
7.28
7.02
6.77
6.55
6.33
6.13
5.94
5.77
5.60
5.45
5.30
5.16
9.00
10.00
128.65
81.00
59.11
46.53
38.37
32.64
28.40
25.14
22.55
20.44
18.69
17.22
15.96
14.88
13.93
13.10
12.36
11.70
11.10
10.57
10.08
9.63
9.23
8.85
8.51
8.19
7.90
7.62
7.36
7.12
6.90
6.69
6.49
6.30
6.13
5.96
5.80
142.94
90.00
65.68
51.70
42.63
36.27
31.56
27.93
25.05
22.71
20.77
19.13
17.74
16.53
15.48
14.55
13.73
12.99
12.34
11.74
11.20
10.70
10.25
9.84
9.46
9.10
8.77
8.47
8.18
7.92
7.67
7.43
7.21
7.00
6.81
6.62
6.45
Analog Microelectronics, Inc.
AME8807
600mA CMOS LDO
n External Resistor Divider Table (contd.)
R1(kohm)
Vout
3.15
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
3.65
3.70
3.75
3.80
3.85
3.90
3.95
4.00
4.05
4.10
4.15
4.20
4.25
4.30
4.35
4.40
4.45
4.50
4.55
4.60
4.65
4.70
4.75
4.80
4.85
4.90
4.95
5.00
1.00
2.00
0.63
0.61
0.60
0.58
0.57
0.56
0.54
0.53
0.52
0.51
0.50
0.49
0.48
0.47
0.46
0.45
0.44
0.44
0.43
0.42
0.41
0.41
0.40
0.39
0.39
0.38
0.38
0.37
0.36
0.36
0.35
0.35
0.34
0.34
0.33
0.33
0.33
0.32
1.26
1.22
1.19
1.17
1.14
1.11
1.09
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.91
0.89
0.87
0.86
0.84
0.83
0.81
0.80
0.79
0.78
0.76
0.75
0.74
0.73
0.72
0.71
0.70
0.69
0.68
0.67
0.66
0.65
0.64
3.00
4.00
5.00
6.00
7.00
R2(kohm)=(1.215*R1(kohm))/(Vout-1.215)
1.88
2.51
3.14
3.77
4.40
1.84
2.45
3.06
3.67
4.28
1.79
2.39
2.99
3.58
4.18
1.75
2.33
2.91
3.50
4.08
1.71
2.28
2.85
3.41
3.98
1.67
2.22
2.78
3.34
3.89
1.63
2.17
2.72
3.26
3.81
1.60
2.13
2.66
3.19
3.72
1.56
2.08
2.60
3.12
3.64
1.53
2.04
2.55
3.06
3.57
1.50
2.00
2.49
2.99
3.49
1.47
1.96
2.44
2.93
3.42
1.44
1.92
2.40
2.88
3.36
1.41
1.88
2.35
2.82
3.29
1.38
1.84
2.31
2.77
3.23
1.36
1.81
2.26
2.72
3.17
1.33
1.78
2.22
2.67
3.11
1.31
1.75
2.18
2.62
3.05
1.29
1.71
2.14
2.57
3.00
1.26
1.68
2.11
2.53
2.95
1.24
1.66
2.07
2.48
2.90
1.22
1.63
2.04
2.44
2.85
1.20
1.60
2.00
2.40
2.80
1.18
1.58
1.97
2.36
2.76
1.16
1.55
1.94
2.33
2.71
1.14
1.53
1.91
2.29
2.67
1.13
1.50
1.88
2.25
2.63
1.11
1.48
1.85
2.22
2.59
1.09
1.46
1.82
2.19
2.55
1.08
1.44
1.79
2.15
2.51
1.06
1.41
1.77
2.12
2.48
1.05
1.39
1.74
2.09
2.44
1.03
1.37
1.72
2.06
2.41
1.02
1.36
1.69
2.03
2.37
1.00
1.34
1.67
2.01
2.34
0.99
1.32
1.65
1.98
2.31
0.98
1.30
1.63
1.95
2.28
0.96
1.28
1.61
1.93
2.25
8.00
9.00
10.00
5.02
4.90
4.78
4.66
4.55
4.45
4.35
4.25
4.16
4.08
3.99
3.91
3.83
3.76
3.69
3.62
3.55
3.49
3.43
3.37
3.31
3.26
3.20
3.15
3.10
3.05
3.00
2.96
2.91
2.87
2.83
2.79
2.75
2.71
2.67
2.64
2.60
2.57
5.65
5.51
5.37
5.24
5.12
5.00
4.89
4.79
4.68
4.58
4.49
4.40
4.31
4.23
4.15
4.07
4.00
3.93
3.86
3.79
3.73
3.66
3.60
3.54
3.49
3.43
3.38
3.33
3.28
3.23
3.18
3.14
3.09
3.05
3.01
2.97
2.93
2.89
6.28
6.12
5.97
5.83
5.69
5.56
5.44
5.32
5.20
5.09
4.99
4.89
4.79
4.70
4.61
4.53
4.44
4.36
4.29
4.21
4.14
4.07
4.00
3.94
3.88
3.81
3.76
3.70
3.64
3.59
3.54
3.49
3.44
3.39
3.34
3.30
3.25
3.21
9
Analog Microelectronics, Inc.
600mA CMOS LDO
AME8807
n Package Dimension
SO-8
A
MILLIMETERS
MIN
MAX
1.35
1.75
INCHES
MIN
MAX
0.053
0.069
A1
0.10
0.25
0.004
0.010
A2
B
—
0.33
—
0.51
—
0.013
—
0.020
SYMBOLS
θ
C
0.19
0.25
0.007
0.010
D
E
4.80
3.80
5.00
4.00
0.189
0.150
0.1970
0.157
e
—
5.80
—
6.20
—
0.228
—
0.244
0.40
1.27
0.10
0.016
0.050
0.004
H
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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-DS8807-C
Corporate Headquarters
Asia Pacific Headquarters
Analog Microelectronics, Inc.
AME, Inc.
3100 De La Cruz Blvd. Suite 201
2F, 187 Kang-Chien Road, Nei-Hu District
Santa Clara, CA. 95054-2046
Tel : (408) 988-2388
Taipei 114, Taiwan, R.O.C.
Tel : 886 2 2627-8687
Fax: (408) 988-2489
Fax : 886 2 2659-2989