AME AME8804AEEY

Analog Microelectronics, Inc.
AME8804
300mA CMOS LDO
n General Description
n Features
The AME8804 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-26 and SOT-25 packages are attractive for "Pocket" and "Hand Held" applications.
l
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
l
l
The SOT-26 version also features a "Power Good" detector, which pulls low when the output is out of regulation.
l
The AME8804 is stable with an output capacitance of
2.2µF or greater.
l
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 Detector (6 pin version only)
Power-Saving Shutdown Mode
Space-Saving SOT-26 and SOT-25
Adjustable Output Voltages
Low Temperature Coefficient
n Applications
l
l
l
l
l
n Functional Block Diagram
IN
l
l
OUT
Overcurrent
Shutdown
Instrumentation
Portable Electronics
Wireless Devices
Cordless Phones
PC Peripherals
Battery Powered Widgets
Electronic Scales
n Typical Application
Thermal
Shutdown
IN
EN
C1
V ref x110%
PG
5V
AMP
V ref =1.215V
GND
C2
R1
1µF
100p
C3
2.2µF
R2
ADJ
V ref x90%
OUT
OUT
EN
IN AME8804
PG
G N D ADJ
V OUT = 1.215 (R1 +R2)/R2
C2 is unnecessary when R1 or R2 < 20K
PG pin is only available in the SOT-26 package option
1
Analog Microelectronics, Inc.
300mA CMOS LDO
AME8804
n Pin Configuration
SOT-26 Top View
6
1
5
SOT-25 Top View
4
2
3
4
5
1. VIN
2. GND
3. EN
4. PG
5. ADJ
6. VOUT
1
2
3
1. VIN
2. GND
3. EN
4. ADJ
5. VOUT
n Ordering Information
Part Number
Marking Output Voltage Package
Operating Temp. Range
AME8804AEEY
AAUww
Adjustable
SOT-26
-40OC to +85OC
AME8804AEEV
AJCww
Adjustable
SOT-25
-40OC to +85OC
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
Maximum
Unit
8
V
P D / (V IN - V O)
mA
GND - 0.3 to V IN + 0.3
V
Input Voltage
Output Current
Input, Output 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)
Thermal Resistance (θja)
Internal Power Dissipation (P D )
(∆ T = 100oC)
Maximum
SOT-25
260
SOT-25
380
SOT-26
260
SOT-26
380
Unit
o
C/W
mW
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
AME8804
n Electrical Specifications
TA = 250C VIN=5V unless otherwise noted
Parameter
Symbol
Input Voltage
V IN
Output Voltage Accuracy
VO
Dropout Voltage
V DROPOUT
Test Condition
Min
IO=1mA
Typ
Max
Units
Note 1
7
V
-1.5
1.5
%
1.5V<V O(NOM)<=2.0V
IO=300mA
V O=V ONOM -2.0%
1300
See
chart
2.0V<V O(NOM)<=2.8V
2.8V<V O(NOM)<3.8V
mV
300
Output Current
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
IGND
IO=1mA to 300mA
35
Line Regulation
REGLINE
Load Regulation
REGLOAD
Over Temerature Shutdown
OTS
150
o
C
Over Temerature Hysterisis
OTH
30
o
C
V O Temperature Coefficient
TC
30
Power Supply Rejection
PSRR
Output Voltage Noise
eN
ADJ Input Bias Current
IADJ
ADJ Reference Voltage
V REF
IO=5mA
V O < 2.0V
V IN =V O+1 to V O+2
V O >= 2.0V
IO=1mA to 300mA
f=10Hz to 100kHz
IO=10mA,CBY P=0µF
450
mA
µA
0.15
%
0.02
0.1
%
0.2
1
%
ppm/ oC
f=1kHz
50
f=10kHz
20
f=100kHz
15
Co=2.2µF
30
µVrms
1
µA
IO=100mA
CO=2.2µF
mA
1.203 1.215
dB
1.227
V
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
IEL
V EN =0V, V IN =2.7V to 7V
0.5
µA
Shutdown Supply Current
ISD
V IN =5V, V O=0V, V EN <V EL
1
µA
Shutdown Output Voltage
V O, SD
IO=35µA,V EN <V EL
0.1
V
85
%V O(NOM)
EN Input Threshold
EN Input Bias Current
Output Under Voltage
V UV
Output Over Voltage
V OV
0.5
0
115
%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(min)=V OUT+V DROPOUT
4
400
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 amplifier, 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 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 AME8804 switches from voltage mode to current
mode when the load exceeds the rated output current.
This prevents over-stress. The AME8804 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 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 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 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 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.
300mA CMOS LDO
AME8804
Load Step ( 1mA-300mA)
Ground Current vs. Input Voltage
Vo(5mV/DIV)
45
35
85 O C
30
25
C L =2.2µF
C I N =2.2µF
Output
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)
Power Supply Rejection Ratio
Chip Enable Transient Response
Enable (2V/DIV)
0
-10
-30
C L =2µF
R L =10Ω
0
-40
-50
Output (1V/DIV)
PSRR (dB)
100mA
C L =2.2µF Tantalum
C B Y P =0
-20
10mA
100mA
-60
-70
-80
1.0E+01
1mA
100µA
100µA
1.0E+03
1.0E+05
0
1.0E+07
TIME ( 1mS/DIV)
Frequency (Hz)
Drop Out Voltage vs Output Voltage
Drop Out Voltage vs Load Current
250
250
200
Dropout Voltage (mV)
Drop Out Voltage (mV)
300
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
0
200
150
100
50
0
2.5
2.75
3
3.25
3.5
Output Voltage (V)
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
3.75
4
0
50
100
150
200
Load Current (mA)
250
300
Analog Microelectronics, Inc.
AME8804
300mA CMOS LDO
Noise Measurement
Vo (1mV/ DIV)
Output Current (mA)
Safe Operating Area
SOT-26
300
SOT-25
100
10
1.0
0.1
8.0
Input-Output Voltage Differential (V)
TIME (20mS/DIV)
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)
Line Transient Response
VIN(1V/DIV)
IOUT (200mA/DIV)
Current Limit Response
R L O A D =3.3Ω
0
TIME (2mS/DIV)
VOUT (10mV/DIV)
VOUT (1V/DIV)
0
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.
300mA CMOS LDO
AME8804
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
Ω)
ESR (Ω
100
0.1
10
Stable Region
1
0.1
Untested Region
0.01
Untested Region
0.01
0
50
100
150
200
0
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
C L =3µF
10
Stable Region
1
C L =10µF
100
Ω)
ESR (Ω
100
Ω)
ESR (Ω
100
10
Stable Region
1
0.1
0.1
0.01
Untested Region
0.01
0
50
100
ILOAD (mA)
8
150
Untested Region
0.001
200
0
50
100
ILOAD (mA)
150
200
Analog Microelectronics, Inc.
AME8804
300mA CMOS LDO
n External Resistor Divider Table
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
5.00
10.00
20.00
50.00 100.00 200.00
R2(kohm)=(1.215*R1(kohm))/(Vout-1.215)
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
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
285.88
180.00
131.35
103.40
85.26
72.54
63.12
55.86
50.10
45.42
41.54
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
714.71
450.00
328.38
258.51
213.16
181.34
157.79
139.66
125.26
113.55
103.85
95.67
88.69
82.65
77.39
72.75
68.64
64.97
61.68
58.70
55.99
53.52
51.27
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
517.02
426.32
362.69
315.58
279.31
250.52
227.10
207.69
191.34
177.37
165.31
154.78
145.51
137.29
129.95
123.35
117.39
111.98
107.05
102.53
98.38
94.55
91.01
87.73
84.67
81.82
79.15
76.66
74.31
72.11
70.03
68.07
66.21
64.46
852.63
725.37
631.17
558.62
501.03
454.21
415.38
382.68
354.74
330.61
309.55
291.02
274.58
259.89
246.70
234.78
223.96
214.10
205.06
196.76
189.11
182.02
175.45
169.34
163.64
158.31
153.31
148.62
144.21
140.06
136.13
132.43
128.91
500.00 1000.00
826.53
773.89
727.54
686.44
649.73
616.75
586.96
559.91
535.24
512.66
491.90
472.76
455.06
438.63
423.34
409.09
395.77
383.28
371.56
360.53
350.14
340.34
331.06
322.28
877.26
846.69
818.18
791.53
766.56
743.12
721.07
700.29
680.67
662.13
644.56
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
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
5.00
10.00
20.00
50.00 100.00 200.00
R2(kohm)=(1.215*R1(kohm))/(Vout-1.215)
3.14
6.28
12.56
31.40
62.79 125.58
3.06
6.12
12.24
30.60
61.21 122.42
2.99
5.97
11.94
29.85
59.71 119.41
2.91
5.83
11.65
29.14
58.27 116.55
2.85
5.69
11.38
28.45
56.91 113.82
2.78
5.56
11.12
27.80
55.61 111.21
2.72
5.44
10.87
27.18
54.36 108.72
2.66
5.32
10.63
26.59
53.17 106.35
2.60
5.20
10.41
26.02
52.03 104.07
2.55
5.09
10.19
25.47
50.94 101.89
2.49
4.99
9.98
24.95
49.90
99.79
2.44
4.89
9.78
24.45
48.89
97.79
2.40
4.79
9.59
23.96
47.93
95.86
2.35
4.70
9.40
23.50
47.00
94.00
2.31
4.61
9.22
23.06
46.11
92.22
2.26
4.53
9.05
22.63
45.25
90.50
2.22
4.44
8.88
22.21
44.42
88.85
2.18
4.36
8.73
21.81
43.63
87.25
2.14
4.29
8.57
21.43
42.86
85.71
2.11
4.21
8.42
21.06
42.11
84.23
2.07
4.14
8.28
20.70
41.40
82.79
2.04
4.07
8.14
20.35
40.70
81.41
2.00
4.00
8.01
20.02
40.03
80.07
1.97
3.94
7.88
19.69
39.38
78.77
1.94
3.88
7.75
19.38
38.76
77.51
1.91
3.81
7.63
19.07
38.15
76.30
1.88
3.76
7.51
18.78
37.56
75.12
1.85
3.70
7.40
18.49
36.99
73.97
1.82
3.64
7.29
18.22
36.43
72.86
1.79
3.59
7.18
17.95
35.89
71.79
1.77
3.54
7.07
17.69
35.37
70.74
1.74
3.49
6.97
17.43
34.86
69.73
1.72
3.44
6.87
17.19
34.37
68.74
1.69
3.39
6.78
16.95
33.89
67.78
1.67
3.34
6.69
16.71
33.43
66.85
1.65
3.30
6.59
16.49
32.97
65.94
1.63
3.25
6.51
16.27
32.53
65.06
1.61
3.21
6.42
16.05
32.10
64.20
500.00 1000.00
313.95
306.05
298.53
291.37
284.54
278.03
271.81
265.86
260.17
254.72
249.49
244.47
239.64
235.01
230.55
226.26
222.12
218.13
214.29
210.57
206.98
203.52
200.16
196.92
193.78
190.74
187.79
184.93
182.16
179.47
176.86
174.32
171.85
169.46
167.13
164.86
162.65
160.50
627.91
612.09
597.05
582.73
569.09
556.06
543.62
531.73
520.34
509.43
498.97
488.93
479.29
470.02
461.10
452.51
444.24
436.27
428.57
421.14
413.97
407.04
400.33
393.84
387.56
381.48
375.58
369.86
364.32
358.94
353.71
348.64
343.71
338.91
334.25
329.72
325.30
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
A
M ILLIM ETERS
M IN
M AX
1.00
1.40
INCHES
M IN
M AX
0.0394
0.0551
A1
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
E
2.70
1.40
3.10
1.80
0.1063
0.0551
0.1220
0.0709
e
H
2.60
3.00
0.1024
0.35
-
0.0138
°
0
0.0335
SYM BOLS
L
θ1
S1
1.90 BSC
°
0
0.85
0.0748 BSC
9
1.05
°
0.1181
°
9
0.0413
SOT-25
A
MILLIMETERS
MIN
MAX
1.00
1.45
INCHES
MIN
MAX
0.0394
0.0571
SYMBOLS
A1
0.00
0.15
0.0000
A2
0.70
1.25
0.0276
0.0492
b
C
0.35
0.08
0.55
0.25
0.0138
0.0031
0.0217
0.0098
D
2.70
3.10
0.1063
0.1220
E
e
1.40
1.80
1.90 BSC
H
2.60
3.00
0.1024
0.1181
L
0.30
-
0.0118
-
θ1
S1
°
0
0.85
°
10
1.05
0.0591
0.0551
0.0709
0.07480 BSC
°
0
0.0335
°
10
0.0413
11
www.analogmicro.com
E-Mail: [email protected]micro.com
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-DS8804-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