AME
AME8844
750mA CMOS LDO
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.
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.
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Functional Block Diagram
(Fixed Versions)
IN
OUT
Overcurrent
Shutdown
Thermal
Shutdown
EN
Vrefx115%
PG
R1
AMP
R2
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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
Vref x85%
Vref
GND
(Adjustable Version)
IN
OUT
Overcurrent
Shutdown
Thermal
Shutdown
AMP
R1
EN
ADJ
(external)
1.242V
R2
(external)
GND
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Typical Applications
IN
IN
OUT
OUT
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Applications
l
Instrumentation
l
Portable Electronics
l
Wireless Devices
l
PC Peripherals
l
Battery Powered Widgets
Rev.F.01
C1
5V
1µF
AME8844
PG
GND
EN
C3
4.7
µF
1
AME
AME8844
750mA CMOS LDO
n
Pin Configuration
MSOP-8
Top View
8
7
6
5
MSOP-8
Top View
AME 8844BEQAADJ
1. EN
2. IN
3. ADJ
8
7
6
5
AME 8844CEQAxxx
1. EN
2. IN
3. NC
AME8844
4. OUT
5. GND
6. GND
7. GND
8. GND
* Die Attach:
Conductive Epoxy
AME8844
4. OUT
5. GND
6. GND
7. PG
8. GND
* Die Attach:
Conductive Epoxy
1
2
3
4
1
2
3
4
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Pin Description
Pin Number
Pin Name
AME8844BEQA AME8844CEQA
Enable pin.
When pulled low, the PMOS pass transistor turns off, current
consuming less than 1µA.
Input voltage pin.
It should be decoupled with 1µF or greater capacitor.
Feedback output voltage for adjustable device.
No connection.
LDO voltage regulator output pin.
It should be decoupled with a 4.7µF or greater value low ESR
ceramic capacitor.
Power-Good output.
This open-drain output is low when output is out of regulation.
Ground connection pin.
Pin Description
1
1
EN
2
3
N/A
2
N/A
3
IN
ADJ
NC
4
4
OUT
N/A
5, 6, 7, 8
7
5, 6, 8
PG
GND
2
Rev.F.01
AME
AME8844
750mA CMOS LDO
n
Ordering Information
Part Number
AME8844BEQAADJ
Marking*
8844
Byww
8844
Byww
8844
Nyww
Output Voltage
ADJ
Package
MSOP-8
Operating Ambient
Temperature Range
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
- 40
o
C to +85
o
C
AME8844BEQAADJZ
ADJ
MSOP-8
AME8844CEQA250Z
2.50
MSOP-8
Note: yww represents the date code
* A line on top of the first character represents lead free plating such as 8844
Please consult AME sales office or authorized Rep./Distributor for the availability of output voltage and package type.
4
Rev.F.01
AME
AME8844
750mA CMOS LDO
n
Absolute Maximum Ratings
Parameter
Input Voltage
EN Voltage
Output Voltage
PG Voltage
Output Current
ESD Classification
Maximum
-0.3 to +8
-0.3 to +8
-0.3 to V
IN
+ 0.3
-0.3 to V
IN
+ 0.3
P
D
/ (V
IN
- V
OUT
)
B*
Unit
V
V
V
V
mA
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device.
* HBM B: 2000~3999V
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Recommended Operating Conditions
Parameter
Ambient Temperature Range
Junction Temperature Range
Storage Temperature Range
Symbol
T
A
T
J
T
STG
Rating
- 40 to +85
- 40 to +125
- 65 to +150
Unit
o
C
C
C
o
o
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Thermal Information
Parameter
Thermal Resistance *
(Junction to Case)
Thermal Resistance
(Junction to Ambient)
Internal Power Dissipation
Maximum Junction Temperature
Solder Iron(10 Sec)**
MSOP-8
Conductive Epoxy
Package
Die Attach
Symbol
θ
JC
θ
JA
P
D
Maximum
100
Unit
o
C/W
206
625
150
350
mW
o
o
C
C
* Measure
θ
JC
on center of molding compound if IC has no tab.
** MIL-STD-202G 210F
Rev.F.01
5
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