AME8804AEEV [AME]
300mA CMOS LDO; 300毫安CMOS LDO
| 型号： | AME8804AEEV |
| 厂家： | 
ANALOG MICROELECTRONICS |
| 描述： | 300mA CMOS LDO |
| 文件： | 总12页 (文件大小：100K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Analog Microelectronics, Inc.
AME8804
300mA CMOS LDO
n General Description
n Features
The AME8804 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-26 and SOT-25 packages are attrac-
tive 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 Power Good Detector (6 pin version only)
l Power-Saving Shutdown Mode
l Space-Saving SOT-26 and SOT-25
l Adjustable Output Voltages
l Low Temperature Coefficient
The SOT-26 version also features a "Power Good" de-
tector, which pulls low when the output is out of regula-
tion.
The AME8804 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
IN
l Battery Powered Widgets
l Electronic Scales
OUT
Overcurrent
Shutdown
n Typical Application
OUT
C3
Thermal
Shutdown
IN
OUT
EN
IN
PG
AME8804
C2
ADJ
GND
EN
C1
R1
R2
100p
5V
1µF
Vref x110%
2.2µF
AMP
PG
ADJ
VOUT = 1.215 (R1 +R2)/R2
C2 is unnecessary when R1 or R2 < 20K
PG pin is only available in the SOT-26 package option
Vref x90%
Vref=1.215V
GND
1
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8804
n Pin Configuration
SOT-26 Top View
SOT-25 Top View
6
5
4
4
5
1. V
4. PG
5. ADJ
6. V
1. V
4. ADJ
5. V
IN
IN
2. GND
3. EN
2. GND
3. EN
OUT
2
1
3
1
2
3
OUT
n Ordering Information
Part Number Marking Output Voltage Package Operating Temp. Range
-40OC to +85OC
-40OC to +85OC
AME8804AEEY
AME8804AEEV
AAUww
AJCww
Adjustable
Adjustable
SOT-26
SOT-25
Please consult AME sales office or authorized Rep./Distributor for other package type availability.
2
Analog Microelectronics, Inc.
AME8804
300mA CMOS LDO
n Absolute Maximum Ratings
Parameter
Input Voltage
Maximum
Unit
V
8
Output Current
mA
V
PD / (VIN - VO)
GND - 0.3 to VIN + 0.3
B
Input, Output Voltage
ESD Classification
n Recommended Operating Conditions
Parameter
Ambient Temperature Range
Junction Temperature
Rating
Unit
oC
- 40 to +85
- 40 to +125
oC
n Thermal Information
Parameter
Maximum
Unit
oC / W
Thermal Resistance (
θja
)
SOT-25
SOT-25
SOT-26
260
Internal Power Dissipation (PD)
380
260
mW
oC / W
mW
( T = 100oC)
∆
Thermal Resistance (
θja
)
Internal Power Dissipation (PD)
SOT-26
380
( T = 100oC)
∆
oC
oC
Maximum Junction Temperature
150
300
Maximum Lead Temperature ( 10 Sec)
Caution: Stress above the listed absolute rating may cause permanent damage to the device
3
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8804
n Electrical Specifications
TA = 250C VIN=5V 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
%
1.5V<VO(NOM)<=2.0V
1300
400
300
IO=300mA
See
chart
Dropout Voltage
VDROPOUT
2.0V<VO(NOM)<=2.8V
2.8V<VO(NOM)<3.8V
mV
VO=VONOM -2.0%
Output Current
Current Limit
IO
ILIM
ISC
IQ
VO>1.2V
300
300
mA
mA
mA
VO>1.2V
VO<0.8V
450
150
30
Short Circuit Current
Quiescent Current
Ground Pin Current
300
50
IO=0mA
A
A
µ
IGND
IO=1mA to 300mA
35
µ
VO < 2.0V
0.15
0.1
1
%
IO=5mA
VIN=VO+1 to VO+2
Line Regulation
REGLINE
VO >= 2.0V
0.02
0.2
150
30
%
%
Load Regulation
REGLOAD
OTS
IO=1mA to 300mA
oC
Over Temerature Shutdown
Over Temerature Hysterisis
VO Temperature Coefficient
oC
OTH
ppm/oC
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
Output Voltage Noise
eN
Co=2.2 F
30
Vrms
µ
µ
IO=10mA,CBYP=0 F
µ
ADJ Input Bias Current
ADJ Reference Voltage
IADJ
VREF
VEH
VEL
IEH
1
A
µ
1.203 1.215 1.227
V
V
V
IN=2.7V to 7V
IN=2.7V to 7V
2.0
0
Vin
0.4
0.1
0.5
1
V
V
EN Input Threshold
V
EN=VIN, VIN=2.7V to 7V
EN=0V, VIN=2.7V to 7V
A
µ
µ
µ
EN Input Bias Current
IEL
V
A
A
Shutdown Supply Current
Shutdown Output Voltage
Output Under Voltage
Output Over Voltage
ISD
VIN=5V, VO=0V, VEN<VEL
I =35 A,VEN<VEL
0.5
VO,SD
VUV
VOV
ILC
0
0.1
85
V
µ
O
%VO(NOM)
%VO(NOM)
115
PG Leakage Current
V
PG=7V
1
7
A
µ
PG Voltage Rating
VPG
VOL
VO in regulation
ISINK=0.4mA
V
PG Voltage Low
0.4
V
Note1:VIN(min)=VOUT+VDROPOUT
4
Analog Microelectronics, Inc.
AME8804
300mA CMOS LDO
n Detailed Description
n Enable
The AME8804 family of CMOS regulators contain a
PMOS pass transistor, voltage reference, error ampli-
fier, over-current protection, thermal shutdown, and
Power Good detection circuitry.
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 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
n Power Good
The AME8804 (SOT-26 package only) includes the Power
Good feature. Normally, Pin 4 is "Floating", however,
when the output is not within ±10% of the specified volt-
age, it pulls low. This can occur under the following con-
ditions:
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
o
below 120 C.
1) Input Voltage too low.
2) During Over-Temperature.
3) During Over-Current.
4) If output is pulled up.
The AME8804 switches from voltage mode to current
mode when the load exceeds the rated output current.
This prevents over-stress. The AME8804 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 External Capacitors
The AME8804 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.
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
AME8804
Load Step ( 1mA-300mA)
Ground Current vs. Input Voltage
45
40
35
30
25
20
15
10
5
CL=2.2
µF
Output
85O
C
C
IN=2.2µF
25O
C
ILoad
0
0
0
1
2
3
4
5
6
7
8
TIME( 20mS/DIV)
Input Voltage (V)
Power Supply Rejection Ratio
Chip Enable Transient Response
0
-10
-20
-30
-40
-50
-60
-70
-80
100mA
CL=2.2
µ
BYP=0
F Tantalum
CL=2
RL=10
µ
Ω
F
C
0
10mA
100mA
1mA
100µA
100µA
0
1.0E+01
1.0E+03
1.0E+05
1.0E+07
TIME ( 1mS/DIV)
Frequency (Hz)
Drop Out Voltage vs Output Voltage
Drop Out Voltage vs Load Current
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
Output Voltage (V)
Load Current (mA)
6
Analog Microelectronics, Inc.
AME8804
300mA CMOS LDO
Noise Measurement
Safe Operating Area
SOT-26
300
100
SOT-25
10
1.0
8.0
0.1
Input-Output Voltage Differential (V)
TIME (20mS/DIV)
Overtemperature Shutdown
Short Circuit Response
RL O A D =100
RS H O R T =0.1
Ω
Ω
0
0
RL O A D =6.6
Ω
0
0
TIME (0.5Sec/DIV)
TIME (2mS/DIV)
Line Transient Response
Current Limit Response
RL O A D =3.3
Ω
CL O A D =2.2µF
I
V
V
L O A D =1mA
O U T D C =3.3V
INDC=4.5V
0
0
TIME (2mS/DIV)
TIME (200mS/DIV)
7
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8804
Stability vs. ESR vs I LOAD
Stability vs. ESR vs ILOAD
10000
10000
1000
100
10
Unstable Region
Unstable Region
1000
µ
CL=1
F
CL=2 F
µ
100
10
Stable Region
Stable Region
1
1
0.1
0.1
0.01
Untested Region
Untested Region
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 F
µ
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)
8
Analog Microelectronics, Inc.
AME8804
300mA CMOS LDO
n External Resistor Divider Table
R1(kohm)
Vout
1.00
2.00
5.00
10.00
20.00
50.00 100.00 200.00 500.00 1000.00
R2(kohm)=(1.215*R1(kohm))/(Vout-1.215)
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
71.47 142.94 285.88 714.71
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
90.00 180.00 450.00
65.68 131.35 328.38
51.70 103.40 258.51 517.02
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
85.26 213.16 426.32 852.63
72.54 181.34 362.69 725.37
63.12 157.79 315.58 631.17
55.86 139.66 279.31 558.62
50.10 125.26 250.52 501.03
45.42 113.55 227.10 454.21
41.54 103.85 207.69 415.38
38.27
35.47
33.06
30.96
29.10
27.46
25.99
24.67
23.48
22.40
21.41
20.51
19.68
18.91
18.20
17.55
16.93
16.36
15.83
15.33
14.86
14.42
14.01
13.61
13.24
12.89
95.67 191.34 382.68
88.69 177.37 354.74
82.65 165.31 330.61 826.53
77.39 154.78 309.55 773.89
72.75 145.51 291.02 727.54
68.64 137.29 274.58 686.44
64.97 129.95 259.89 649.73
61.68 123.35 246.70 616.75
58.70 117.39 234.78 586.96
55.99 111.98 223.96 559.91
53.52 107.05 214.10 535.24
51.27 102.53 205.06 512.66
49.19
47.28
45.51
43.86
42.33
40.91
39.58
38.33
37.16
36.05
35.01
34.03
33.11
32.23
98.38 196.76 491.90
94.55 189.11 472.76
91.01 182.02 455.06
87.73 175.45 438.63 877.26
84.67 169.34 423.34 846.69
81.82 163.64 409.09 818.18
79.15 158.31 395.77 791.53
76.66 153.31 383.28 766.56
74.31 148.62 371.56 743.12
72.11 144.21 360.53 721.07
70.03 140.06 350.14 700.29
68.07 136.13 340.34 680.67
66.21 132.43 331.06 662.13
64.46 128.91 322.28 644.56
6.45
9
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8804
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
5.00
10.00
20.00
50.00 100.00 200.00 500.00 1000.00
R2(kohm)=(1.215*R1(kohm))/(Vout-1.215)
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
3.14
3.06
2.99
2.91
2.85
2.78
2.72
2.66
2.60
2.55
2.49
2.44
2.40
2.35
2.31
2.26
2.22
2.18
2.14
2.11
2.07
2.04
2.00
1.97
1.94
1.91
1.88
1.85
1.82
1.79
1.77
1.74
1.72
1.69
1.67
1.65
1.63
1.61
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
12.56
12.24
11.94
11.65
11.38
11.12
10.87
10.63
10.41
10.19
9.98
9.78
9.59
9.40
9.22
9.05
8.88
8.73
8.57
8.42
8.28
8.14
8.01
7.88
7.75
7.63
7.51
7.40
7.29
7.18
7.07
6.97
6.87
6.78
6.69
6.59
6.51
6.42
31.40
30.60
29.85
29.14
28.45
27.80
27.18
26.59
26.02
25.47
24.95
24.45
23.96
23.50
23.06
22.63
22.21
21.81
21.43
21.06
20.70
20.35
20.02
19.69
19.38
19.07
18.78
18.49
18.22
17.95
17.69
17.43
17.19
16.95
16.71
16.49
16.27
16.05
62.79 125.58 313.95 627.91
61.21 122.42 306.05 612.09
59.71 119.41 298.53 597.05
58.27 116.55 291.37 582.73
56.91 113.82 284.54 569.09
55.61 111.21 278.03 556.06
54.36 108.72 271.81 543.62
53.17 106.35 265.86 531.73
52.03 104.07 260.17 520.34
50.94 101.89 254.72 509.43
49.90
48.89
47.93
47.00
46.11
45.25
44.42
43.63
42.86
42.11
41.40
40.70
40.03
39.38
38.76
38.15
37.56
36.99
36.43
35.89
35.37
34.86
34.37
33.89
33.43
32.97
32.53
32.10
99.79 249.49 498.97
97.79 244.47 488.93
95.86 239.64 479.29
94.00 235.01 470.02
92.22 230.55 461.10
90.50 226.26 452.51
88.85 222.12 444.24
87.25 218.13 436.27
85.71 214.29 428.57
84.23 210.57 421.14
82.79 206.98 413.97
81.41 203.52 407.04
80.07 200.16 400.33
78.77 196.92 393.84
77.51 193.78 387.56
76.30 190.74 381.48
75.12 187.79 375.58
73.97 184.93 369.86
72.86 182.16 364.32
71.79 179.47 358.94
70.74 176.86 353.71
69.73 174.32 348.64
68.74 171.85 343.71
67.78 169.46 338.91
66.85 167.13 334.25
65.94 164.86 329.72
65.06 162.65 325.30
64.20 160.50 321.00
Note: Small load (greater than 2 mA) is necessary as R1 or R2 is larger than 50 Kohm. Otherwise, output
voltage probably cannot be pulled down to 0 V on disable mode.
10
Analog Microelectronics, Inc.
AME8804
300mA CMOS LDO
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
0.1024
0.0138
0°
0.1181
-
9°
-
9°
1
θ
S1
0.85
1.05
0.0335
0.0413
SOT-25
MILLIMETERS
INCHES
SYMBOLS
MIN
1.00
0.00
0.70
0.35
0.08
2.70
1.40
MAX
1.45
0.15
1.25
0.55
0.25
3.10
1.80
MIN
MAX
0.0571
0.0591
0.0492
0.0217
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
0.07480 BSC
H
L
2.60
0.30
0°
3.00
0.1024
0.1181
-
10°
0.0118
0°
-
10°
θ1
S1
0.85
1.05
0.0335
0.0413
11
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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-DS8804-E
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AME, Inc.
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Santa Clara, CA. 95054-2046
Tel : (408) 988-2388
Fax: (408) 988-2489
Fax: 886 2 2659-2989
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