Analog Microelectronics, Inc.
AME1117
1A Low Dropout Positive
Voltage Regulator
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
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 90µA
l
Overcurrent protection
l
Thermal protection
l
Available in TO-220, TO-252, SOT-223
n
Applications
l
High Efficiency Linear Regulators
l
5V to 3.3V Voltage Converter
l
Battery Charger
l
Post Regulators for Switching Supplies
n
Functional Block Diagram
In p u t
n
Typical Application
AM E1117
C u rre n t
L im itin g
A m p lifie r
GND
4.75V to 12V
10µF Tan
10µF Tan
Load
T h e rm a l
P ro te ctio n
O u tp u t
E rro r
Am p.
Bandgap
R e fe re n c e
A D J/C O M
Input range depends on V
OUT
Please refer to electrical characteristics.
Figure 1
Figure 2
1
Analog Microelectronics, Inc.
AME1117
1A Low Dropout Positive
Voltage Regulator
n
Pin Configuration
AME1117
AME 1117
1
2
3
A D J / G N D V
OUT
V
IN
ADJ/GND
V
OUT
V
IN
TO-220 Front View
SOT-223 Front View
AME 1117
1
2
3
AME1117
1
ADJ/GND
2
V
OUT
3
V
IN
ADJ/GND
V
OUT
V
IN
TO-252 ( DPAK-2)
Front View
TO-252 ( DPAK-2)
Front View
2
Analog Microelectronics, Inc.
AME1117
1A Low Dropout Positive
Voltage Regulator
n
Ordering Information
Part Number
AME1117ACGT
AME1117BCGT
AME1117CCGT
AME1117DCGT
AME1117ACCT
Marking Output Voltage Package
ABEyww
AKEyww
ABFyww
AKFyww
AME1117
ACCT
yyww
AME1117
BCCT
yyww
AME1117
CCCT
yyww
AME1117
DCCT
yyww
AME1117
ACBT
yyww
AME1117
BCBT
yyww
AME1117
CCBT
yyww
AME1117
DCBT
yyww
ADJ
2.5
3.3
5.0
ADJ
SOT-223
AME1117BCCT
2.5
TO-252
(DPAK-2)
3.3
AME1117CCCT
AME1117DCCT
5.0
AME1117ACBT
ADJ
AME1117BCBT
2.5
TO-220
3.3
AME1117CCBT
AME1117DCBT
5.0
3
Analog Microelectronics, Inc.
AME1117
1A Low Dropout Positive
Voltage Regulator
n
Absolute Maximum Ratings
Parameter
Input Voltage
TO-220
Thermal Resistance
(Junction to Case)
TO-252
SOT-223
TO-220
Thermal Resistance
(Junction to Ambient)
TO-252
SOT-223
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (10 sec)
T
J
T
STG
T
LEAD
θ
JA
θ
JC
Symbol
V
IN
Maximum
7
2.5
5
15
50
90
160
0 to 125
-65 to 150
260
o
o
Unit
V
C/W
C
n
Electrical Characteristics
AME1117AXXX
Parameter
Reference voltage
Line regulation *
Load regulation
Dropout voltage
Current limit
Temp. coefficient
Adjust pin current
Adjust pin
current change
Temperature stability
Minimum load current
RMS output noise
Ripple rejection ratio
Symbol
V
REF
Reg
LINE
Reg
LOAD
V
D
I
S
T
C
I
ADJ
∆
I
ADJ
T
S
I
O
V
N
R
A
Test conditions
V
IN
= 5V, I
O
= 10mA
V
IN
= 4.75~7V, I
O
= 10mA
V
IN
= 5V, I
O
= 10mA~1A
I
O
= 10mA~1A,
∆
Vo =
±
1%
V
IN
= 2.75~7V
V
IN
= 2.75~7V, I
O
= 10mA~1A
V
IN
T
J
= 25
o
C
= 2.75~7V, I
O
= 10mA~1A
Over Temp.
Min.
Typ.
Max.
Unit
V
T
J
= 25
o
C 1.238 1.250 1.262
Over Temp. 1.225 1.250 1.275
T
J
= 25
o
C
T
J
= 25
o
C
Over Temp.
T
J
= 25
o
C
Over Temp.
Over Temp.
-
-
-
-
-
1.0
-
-
-
-
-
-
-
60
0.2
0.5
5
0.003
72
10
-
-
-
0.05
0.2
1.2
1.3
-
0.005
55
0.2
0.3
0.4
1.4
-
-
-
-
90
5
%
mA
%V
O
dB
µ
A
V
A
%/”C
%
V
IN
= 2.75~7V, I
O
= 10mA~1A, Over Temp.
V
IN
= 5V, I
O
= 100mA, Over Temp.
V
IN
= 5V
T
J
= 25
o
C
V
IN
= 5V, I
O
= 1A, Over Temp.
4
Analog Microelectronics, Inc.
AME1117
1A Low Dropout Positive
Voltage Regulator
AME1117BXXX
Parameter
Output voltage
Line regulation
Load regulation
Symbol
V
O
Reg
LINE
Reg
LOAD
V
D
I
S
I
Q
T
C
T
S
V
N
R
A
Test conditions
V
IN
= 5V, I
O
= 0A
V
IN
= 4.75~7V, I
O
= 0A
V
IN
= 5V, I
O
= 0A~1A
I
O
= 0A~1A,
∆
Vo =
±
1%
V
IN
= 4.75~7V, Over Temp.
V
IN
= 5V, I
O
= 0A~1A, Over Temp.
V
IN
= 4.75~7V, I
O
= 0A~1A
V
IN
= 5V, I
O
= 100mA, Over Temp.
T
J
= 25
o
C
V
IN
= 5V, I
O
= 1A, Over Temp.
Min.
2.475
T
J
= 25
o
C
Over Temp. 2.450
T
J
= 25
o
C
T
J
= 25
o
C
Over Temp.
T
J
= 25
o
C
Over Temp.
-
-
-
-
-
1.0
-
-
-
-
60
Typ.
2.500
2.500
-
0.05
0.2
1.2
1.3
-
6
0.005
0.5
0.003
72
Max.
2.525
2.550
0.2
0.3
0.4
1.4
V
-
-
13
-
-
-
-
A
mA
%/”C
%
%V
O
dB
%
Unit
V
Dropout voltage
Current limit
Quiescent Current
Temp. Coefficient
Temperature stability
RMS output noise
Ripple rejection ratio
AME1117CXXX
Parameter
Output voltage
Line regulation
Load regulation
Symbol
V
O
Reg
LINE
Reg
LOAD
Test conditions
V
IN
= 5V, I
O
= 0A
V
IN
= 4.75~7V, I
O
= 0A
V
IN
= 5V, I
O
= 0A~1A
I
O
= 0A~1A,
∆
Vo =
±
1%
V
IN
= 4.75~7V, Over Temp.
V
IN
= 5V, I
O
= 0A~1A, Over Temp.
V
IN
= 4.75~7V, I
O
= 0A~1A
V
IN
= 5V, I
O
= 100mA, Over Temp.
T
J
= 25
o
C
V
IN
= 5V, I
O
= 1A, Over Temp.
Min.
3.270
T
J
= 25
o
C
Over Temp. 3.234
T
J
= 25
o
C
T
J
= 25
o
C
Over Temp.
T
J
= 25
o
C
Over Temp.
-
-
-
-
-
1.0
-
-
-
-
60
Typ.
3.300
3.300
-
0.05
0.2
1.2
1.3
-
6
0.005
0.5
0.003
72
Max.
3.330
3.366
0.2
0.3
0.4
1.4
V
-
-
13
-
-
-
-
A
mA
%/”C
%
%V
O
dB
%
Unit
V
Dropout voltage
Current limit
Quiescent Current
Temp. coefficient
Temperature stability
RMS output noise
Ripple rejection ratio
V
D
I
S
I
Q
T
C
T
S
V
N
R
A
*Line regulation test circuit
5
电子工程世界
分立器件
