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PDF AME8844 Data sheet ( Hoja de datos )
| Número de pieza | AME8844 | |
| Descripción | 750mA CMOS LDO | |
| Fabricantes | Analog Microelectronics | |
| Logotipo |  |
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AME, Inc.
AME8844
n General Description
The AME8844 family of positive, linear regulators fea-
ture low quiescent current (45µA typ.) with low dropout
voltage, making them ideal for battery applications.
Output voltages are set at the factory and trimmed to
1.5% accuracy.
www.DataSheet4U.com
These rugged devices have both Thermal Shutdown,
and Current Fold-back to prevent device failure under the
"Worst" operating conditions.
An additional feature is a “Power Good” detector, which
pulls low when the output is out of regulation.
The AME8844 is stable with an output capacitance of
4.7µF or greater.
n Features
l Very Low Dropout Voltage
l Guaranteed 750mA Output
l Accurate to within 1.5%
l 45µA Quiescent Current Typically
l Over-Temperature Shutdown
l Current Limiting
l Short Circuit Current Fold-back
l Noise Reduction Bypass Capacitor (Fixed
Versions)
l Power-Saving Shutdown Mode
l Space-Saving MSOP-8 Package
l 6 Factory Pre-set Output Voltages
l Low Temperature Coefficient
l Adjustable Version
l Power Good Output Function.
l All AME's Lead Free Products Meet RoHS
Standards
n Applications
l Instrumentation
l Portable Electronics
l Wireless Devices
l PC Peripherals
l Battery Powered Widgets
Rev.E.01
750mA CMOS LDO
n Functional Block Diagram
(Fixed Versions)
IN
OUT
Overcurrent
Shutdown
Thermal
Shutdown
EN
Vref x115%
PG
AMP
R1
Vref x85%
Vref
(Adjustable Version)
IN
R2
GND
OUT
Overcurrent
Shutdown
Thermal
Shutdown
AMP
R1
(external)
EN
1.242V
ADJ
R2
(external)
n Typical Applications
GND
IN
5V
IN OUT
AME8844
PG GND EN
C1
1µF
OUT
C3
4.7µF
1
1 page  
AME, Inc.
AME8844
750mA CMOS LDO
n Absolute Maximum Ratings
Parameter
Input Voltage
Maximum
-0.3 to 8
Unit
V
EN Voltage
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Output Voltage
-0.3 to 8
-0.3 to VIN + 0.3
V
V
PG Voltage
Output Current
ESD Classification
-0.3 to VIN + 0.3
PD / (VIN - VOUT)
B*
V
mA
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device.
* HBM B: 2000~3999V
n Recommended Operating Conditions
Parameter
Ambient Temperature Range
Junction Temperature Range
Storage Temperature Range
Symbol
TA
TJ
TSTG
Rating
- 40 to 85
- 40 to 125
- 65 to 150
Unit
oC
oC
oC
n Thermal Information
Parameter
Thermal Resistance *
(Junction to Case)
Thermal Resistance
(Junction to Ambient)
Package Die Attach Symbol
θJC
MSOP-8 Conductive Epoxy
θJA
Internal Power Dissipation
PD
Maximum Junction Temperature
Solder Iron(10 Sec)**
* Measure θJC on center of molding compound if IC has no tab.
** MIL-STD-202G 210F
Rev.E.01
Maximum
100
206
625
150
350
Unit
oC / W
mW
oC
oC
5
5 Page 
AME, Inc.
AME8844
n External Resistor Divider Table
R1
(K Ohm)
Vout
1.30
www.DataSheet4U.com 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
1
20.67
11.27
7.75
5.90
4.77
4.00
3.44
3.02
2.70
2.43
2.21
2.03
1.88
1.75
1.63
1.53
1.44
1.36
1.29
1.23
1.17
1.12
1.07
1.02
0.98
0.95
0.91
0.88
0.85
0.82
0.79
0.77
0.75
0.73
0.70
0.69
0.67
2 5 10 20
R2(kohm)=(1.24*R1(kohm))/(Vout-1.24)
41.33
22.55
15.50
11.81
9.54
8.00
6.89
6.05
5.39
4.86
4.43
4.07
3.76
3.49
3.26
3.06
2.88
2.73
2.58
2.46
2.34
2.23
2.14
2.05
1.97
1.89
1.82
1.76
1.70
1.64
1.59
1.54
1.49
1.45
1.41
1.37
1.33
103.33
56.36
38.75
29.52
23.85
20.00
17.22
15.12
13.48
12.16
11.07
10.16
9.39
8.73
8.16
7.65
7.21
6.81
6.46
6.14
5.85
5.59
5.34
5.12
4.92
4.73
4.56
4.40
4.25
4.11
3.97
3.85
3.73
3.63
3.52
3.43
3.33
206.67
112.73
77.50
59.05
47.69
40.00
34.44
30.24
26.96
24.31
22.14
20.33
18.79
17.46
16.32
15.31
14.42
13.63
12.92
12.28
11.70
11.17
10.69
10.25
9.84
9.47
9.12
8.79
8.49
8.21
7.95
7.70
7.47
7.25
7.05
6.85
6.67
413.33
225.45
155.00
118.10
95.38
80.00
68.89
60.49
53.91
48.63
44.29
40.66
37.58
34.93
32.63
30.62
28.84
27.25
25.83
24.55
23.40
22.34
21.38
20.50
19.68
18.93
18.24
17.59
16.99
16.42
15.90
15.40
14.94
14.50
14.09
13.70
13.33
750mA CMOS LDO
Rev.E.01
11
11 Page | ||
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| PDF Descargar | [ Datasheet AME8844.PDF ] | |
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