AME, Inc.
AME8847
n
General Description
The AME8847 of positive, linear regulators feature low
quiescent current (30µA typ.) with low dropout voltage,
making them ideal for battery applications. The space-
saving SOT-223 & SOT-89 packages are attractive for
"Pocket" and "Hand Held" applications.
These rugged devices have both thermal shutdown, and
current fold-back to prevent device failure under the "Worst"
operating conditions.
The AME8847 is stable with an output capacitance of
2.2µF or greater.
800mA CMOS LDO
n
Functional Block Diagram
IN
OUT
Overcurrent
Shutdown
Thermal
Shutdown
R1
AMP
n
Features
l
Very Low Dropout Voltage
l
Guaranteed 800mA Output
l
Accurate to within +1.5%
l
30µA Quiescent Current
l
Over-Temperature Shutdown
l
Current Limiting
l
Short Circuit Current Fold-back
l
Space-Saving SOT-223 & SOT-89 Packages
l
Factory Pre-set Output Voltages
l
Low Temperature Coefficient
l
All AME's Lead Free Products Meet RoHS
Standards
IN
V
ref
=1.215V
R2
GND
n
Typical Application
AME8847
OUT
GND
OUT
IN
C1
5V
1µF
C2
2.2µF
n
Applications
l
Instrumentation
l
Portable Electronics
l
Wireless Devices
l
Cordless Phones
l
PC Peripherals
l
Battery Powered Widgets
Rev.A.01
1
AME, Inc.
AME8847
n
Pin Configuration
SOT-223
Top View
AME8847AEGT
1. GND
2. OUT (TAB)
3. IN
* Die Attach:
Non-Conductive Epoxy
1
2
3
800mA CMOS LDO
SOT-89
Top View
AME8847AEFT
1. GND
2. IN (TAB)
3. OUT
* Die Attach:
Non-Conductive Epoxy
AME8847
AME8847
1
2
3
n
Ordering Information
AME8847 x x x x xxx x
Special Feature
Output Voltage
Number of Pins
Package Type
Operating Ambient Temperature Range
Pin Configuration
Pin
Configuration
A: 1. GND
(SOT-89)
2. IN
3. OUT
A: 1. GND
(SOT-223)
2. OUT
3. IN
Operating Ambient
Temperature
Range
E: -40
O
C to 85
O
C
Package
Type
F: SOT-89
G: SOT-223
Number
of
Pins
T: 3
Output
Voltage
180: V=1.8V
250: V=2.5V
330: V=3.3V
Special Feature
Z: Lead Free
2
Rev.A.01
AME, Inc.
AME8847
n
Ordering Information
Part Number
AME8847AEFT180Z
AME8847AEGT180Z
AME8847AEFT250Z
AME8847AEGT250Z
AME8847AEFT330Z
AME8847AEGT330Z
800mA CMOS LDO
Marking*
A8847
A18ww
BHIyww
A8847
A25ww
BHJyww
A8847
A33ww
BFWyww
Output Voltage
1.8V
1.8V
2.5V
2.5V
3.3V
3.3V
Package
SOT-89
SOT-223
SOT-89
SOT-223
SOT-89
SOT-223
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
- 40
o
C to 85
o
C
- 40
o
C to 85
o
C
- 40
o
C to 85
o
C
Note: ww & yww represents the date code pls refer to Date Code Rule on Package Dimension.
* A line on top of the first letter represents lead free plating such as A8847
Please consult AME sales office or authorized Rep./Distributor for output voltage and package type availability.
Rev.A.01
3
AME, Inc.
AME8847
n
Absolute Maximum Ratings
Parameter
Input Voltage
Output Current
Input, Output Voltage
ESD Classification
800mA CMOS LDO
Maximum
8
1
GND - 0.3 to V
IN
+ 0.3
B*
Unit
V
A
V
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device.
*HBM B:2000V~3999V
n
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
o
o
C
C
C
n
Thermal Information
Parameter
Thermal Resistance*
(Junction to Case)
Package
SOT-89
Die Attach
Symbol
θ
JC
Maximum
46
Unit
o
C/W
SOT-223
SOT-89
SOT-223
SOT-89
31
180
θ
JA
135
550
P
D
mW
800
350
o
o
Thermal Resistance
(Junction to Ambient)
Non-Conductive
Epoxy
C/W
Internal Power Dissipation
SOT-223
Solder Iron(10 Sec)**
C
* Measure
θ
JC
on backside center of tab.
** MIL-STD-202G 210F
4
Rev.A.01
AME, Inc.
AME8847
n
Electrical Specifications
T
A
= 25
O
C unless otherwise noted
Parameter
Input Voltage
Output Voltage Accuracy
Symbol
V
IN
V
OUT
I
OUT
= 800mA
V
OUT
= V
OUT(NOM)
- 2.0%
I
OUT
= 1mA
1.8V <= V
OUT(NOM)
<= 2.0V
2.0V < V
OUT(NOM)
<= 2.8V
2.8V < V
OUT(NOM)
Output Current
Output Current Limit
Output Short Circuit Current
Quiescent Current
Ground Pin Current
Output Voltage Line
Regulation
Output Voltage Load
Regulation
Thermal Shutdown
Temperature
Temperature Hysterisis
Output Voltage Temperature
Coefficient
Power Supply Ripple
Rejection
I
OUT
I
LIM
I
SC
I
Q
I
GND
V
OUT
>= 1.8V
V
OUT
>= 1.8V
V
OUT
< 0.8V
I
OUT
= 0mA
I
OUT
= 1mA to 800mA
I
OUT
= 1mA
V
IN
= V
OUT
+ 1 to V
OUT
+ 2
1.8V <= V
OUT
<= 2.0V
2.0V < V
OUT
< 4.0V
V
OUT
>= 4.0V
REG
LOAD
T
SHDN
T
HYS
T
C
f = 100Hz
PSRR
I
OUT
= 100mA
C
OUT
= 2.2
µ
F
f = 10Hz to 100KHz
I
OUT
= 10mA
f = 1KHz
f = 10KHz
C
OUT
= 2.2
µ
F
I
OUT
= 1mA to 800mA
-0.15
-0.1
-0.4
0.02
0.2
0.2
150
30
30
60
50
20
30
µ
Vrms
dB
800
900
400
30
35
0.15
0.1
0.4
1
%
o
800mA CMOS LDO
Test Condition
Min
Note 1
-1.5
Typ Max Units
7
1.5
1400
See
1000
chart
800
mV
V
%
Dropout Voltage
V
DROP
mA
mA
800
50
mA
µ
A
µ
A
REG
LINE
%
C
C
o
ppm/
o
C
Output Voltage Noise
e
N
Note1: V
IN(MIN)
= V
OUT
+ V
DROP
Note2: To prevent the Short Circuit Current protection feature from being prematurely activated, the input voltage must be
applied before a current source load is applied.
Rev.A.01
5
电子工程世界
