Analog Microelectronics, Inc.
1
AME1117
1A Low Dropout Positive
Voltage Regulator
n
n
n
n
n
Typical Application
n
n
n
n
n
General Descriptions
The AME1117 is a 1A low-dropout positive voltage regu-
lator. It is available in fixed and adjustable output
voltage versions. Overcurrent and thermal protection
are integrated onto the chip. Output current will limit
as while it reaches the pre-set current or temperature
limit. The dropout voltage is specified at 1.4V Maxi-
mum at full rated output current. The AME1117 series
provides excellent regulation over line, load and tem-
perature variations.
n
n
n
n
n
Applications
l
High Efficiency Linear Regulators
l
5V to 3.3V Voltage Converter
l
Battery Charger
l
Post Regulators for Switching Supplies
n
n
n
n
n
Functional Block Diagram
Figure 1
n
n
n
n
n
Key Features
l
Low dropout voltage ..............1.2V at 1A
l
Adjustable or fixed voltages 2.5V, 3.3V, 5.0V
l
Typical line regulation ....... 0.2%
l
Typical load regulation ...... 0.15%
l
Adjust pin current less than 90
A
l
Overcurrent protection
l
Thermal protection
l
Available in TO-220, TO-252, SOT-223
Input range depends on V
OUT
Please refer to electrical characteristics.
Figure 2
T h e rm a l
P ro te c tio n
B a n d g a p
R e fe re n c e
C u rre n t
L im itin g
A m p lifie r
In p u t
O u tp u t
A D J /C O M
E rro r
A m p .
10
F T an
4.75V to 12V
L o a d
10
F T an
AM E1117
G N D
Analog Microelectronics, Inc.
3
AME1117
1A Low Dropout Positive
Voltage Regulator
n
n
n
n
n
Ordering Information
Part Number
Marking Output Voltage Package
AME1117ACGT
ABEyww
ADJ
AME1117BCGT
AKEyww
2.5
AME1117CCGT
ABFyww
3.3
AME1117DCGT
AKFyww
5.0
AME1117ACCT
AME1117
ACCT
yyww
ADJ
AME1117BCCT
AME1117
BCCT
yyww
2.5
AME1117CCCT
AME1117
CCCT
yyww
3.3
AME1117DCCT
AME1117
DCCT
yyww
5.0
AME1117ACBT
AME1117
ACBT
yyww
ADJ
AME1117BCBT
AME1117
BCBT
yyww
2.5
AME1117CCBT
AME1117
CCBT
yyww
3.3
AME1117DCBT
AME1117
DCBT
yyww
5.0
SOT-223
TO-220
TO-252
(DPAK-2)
Analog Microelectronics, Inc.
4
AME1117
1A Low Dropout Positive
Voltage Regulator
n
n
n
n
n
Absolute Maximum Ratings
n
n
n
n
n
Electrical Characteristics
AME1117AXXX
Parameter
Symbol
Min.
Typ.
Max.
Unit
T
J
= 25
o
C
1.238 1.250 1.262
Over Temp. 1.225 1.250 1.275
T
J
= 25
o
C
-
0.05
0.3
Over Temp.
-
0.2
0.4
T
J
= 25
o
C
-
1.2
1.4
Over Temp.
-
1.3
-
Current limit
I
S
V
IN
= 2.75~7V
Over Temp.
1.0
-
-
A
Temp. coefficient
T
C
V
IN
= 2.75~7V, I
O
= 10mA~1A
-
0.005
-
%/"C
T
J
= 25
o
C
-
55
-
Over Temp.
-
90
Adjust pin
current change
Temperature stability
T
S
V
IN
= 5V, I
O
= 100mA, Over Temp.
-
0.5
%
Minimum load current
I
O
V
IN
= 5V
-
5
10
mA
RMS output noise
V
N
T
J
= 25
o
C
-
0.003
-
%V
O
Ripple rejection ratio
R
A
V
IN
= 5V, I
O
= 1A, Over Temp.
60
72
-
dB
-
-
0.2
Dropout voltage
V
D
I
O
= 10mA~1A,
Vo =
1%
-
Reference voltage
V
REF
V
Adjust pin current
I
ADJ
Line regulation *
Load regulation
%
V
IN
= 5V, I
O
= 10mA~1A
Test conditions
V
IN
= 2.75~7V, I
O
= 10mA~1A
V
IN
= 5V, I
O
= 10mA
I
ADJ
V
IN
= 2.75~7V, I
O
= 10mA~1A, Over Temp.
Reg
LOAD
Reg
LINE
V
IN
= 4.75~7V, I
O
= 10mA
T
J
= 25
o
C
A
5
0.2
V
Symbol
Maximum
Unit
V
IN
7
V
TO-220
2.5
TO-252
5
SOT-223
15
TO-220
50
TO-252
90
SOT-223
160
Operating Junction Temperature Range
T
J
0 to 125
T
STG
-65 to 150
T
LEAD
260
o
C/W
Thermal Resistance
(Junction to Ambient)
JA
o
C
Storage Temperature Range
Lead Temperature (10 sec)
Parameter
Input Voltage
Thermal Resistance
(Junction to Case)
JC
Analog Microelectronics, Inc.
5
AME1117
1A Low Dropout Positive
Voltage Regulator
*Line regulation test circuit
AME1117BXXX
Parameter
Symbol
Min.
Typ.
Max.
Unit
T
J
= 25
o
C
2.475
2.500
2.525
Over Temp. 2.450
2.500
2.550
T
J
= 25
o
C
-
0.05
0.3
Over Temp.
-
0.2
0.4
T
J
= 25
o
C
-
1.2
1.4
Over Temp.
-
1.3
-
Current limit
I
S
V
IN
= 4.75~7V, Over Temp.
1.0
-
-
A
Quiescent Current
I
Q
V
IN
= 5V, I
O
= 0A~1A, Over Temp.
-
6
13
mA
Temp. Coefficient
T
C
V
IN
= 4.75~7V, I
O
= 0A~1A
-
0.005
-
%/"C
Temperature stability
T
S
V
IN
= 5V, I
O
= 100mA, Over Temp.
-
0.5
-
%
RMS output noise
V
N
T
J
= 25
o
C
-
0.003
-
%V
O
Ripple rejection ratio
R
A
V
IN
= 5V, I
O
= 1A, Over Temp.
60
72
-
dB
-
-
0.2
Dropout voltage
V
D
I
O
= 0A~1A,
Vo =
1%
Reg
LOAD
V
IN
= 5V, I
O
= 0A~1A
V
IN
= 4.75~7V, I
O
= 0A
T
J
= 25
o
C
V
Test conditions
Output voltage
V
O
V
IN
= 5V, I
O
= 0A
V
Line regulation
Reg
LINE
%
Load regulation
AME1117CXXX
Parameter
Symbol
Min.
Typ.
Max.
Unit
T
J
= 25
o
C
3.270
3.300
3.330
Over Temp. 3.234
3.300
3.366
T
J
= 25
o
C
-
0.05
0.3
Over Temp.
-
0.2
0.4
T
J
= 25
o
C
-
1.2
1.4
Over Temp.
-
1.3
-
Current limit
I
S
V
IN
= 4.75~7V, Over Temp.
1.0
-
-
A
Quiescent Current
I
Q
V
IN
= 5V, I
O
= 0A~1A, Over Temp.
-
6
13
mA
Temp. coefficient
T
C
V
IN
= 4.75~7V, I
O
= 0A~1A
-
0.005
-
%/"C
Temperature stability
T
S
V
IN
= 5V, I
O
= 100mA, Over Temp.
-
0.5
-
%
RMS output noise
V
N
T
J
= 25
o
C
-
0.003
-
%V
O
Ripple rejection ratio
R
A
V
IN
= 5V, I
O
= 1A, Over Temp.
60
72
-
dB
V
I
O
= 0A~1A,
Vo =
1%
Test conditions
Output voltage
V
O
Dropout voltage
V
D
%
V
V
IN
= 5V, I
O
= 0A
Load regulation
Line regulation
V
IN
= 5V, I
O
= 0A~1A
Reg
LINE
Reg
LOAD
V
IN
= 4.75~7V, I
O
= 0A
T
J
= 25
o
C
-
-
0.2
PDF 
ZIP