AP1118
1A Positive Low Dropout Fixed-Mode Regulator With EN Function
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 1.1 Feb. 15, 2005
1/10
Features
1.4V maximum dropout at full load current
Fast transient response
Output current limiting
Built-in thermal shutdown
Packages: TO220-5, TO252-5, TO263-5, SOP8
Good noise rejection
Fixed Output 1.5V, 1.8V, 2.5V, 3.3V, 5.0V, 9.0V,
12V
Enable function
Applications
PC peripheral
Communication
CDROM..
General Description
AP1118 is a low dropout positive fixed-mode
regulator with minimum of 1A output current
capability. The product is specifically designed to
provide well-regulated supply for low voltage IC
applications such as high-speed bus termination
and low current 3.3V logic supply. AP1118 is also
well suited for other applications such as VGA
cards. AP1118 is guaranteed to have <1.4V
dropout at full load current making it ideal to provide
well regulated outputs of 1.25 to 12V with up to 18V
input supply. The AP1118 offers a TTL Logic
compatible enable pin.
Ordering Information
AP 1118 X XX X X
Low Dropout Regulator
Package
Vout
D : TO252-5L
T : TO220-5L
K : TO263-5L
S : SOP-8L
15 : 1.5V
18 : 1.8V
25 : 2.5V
33 : 3.3V
50 : 5.0V
90 : 9.0V
12 : 12V
Packing
Blank : Tube
A : Taping
Lead Free
Blank : Normal
L : Lead Free Package
Typical Circuit
C2
100uF
5V
3.3V/1A
Tab is Vout
Vin
Vout
GND
C1
100uF
( 5V/3.3V fixed output )
EN
NC
AP1118
1A Positive Low Dropout Fixed-Mode Regulator With EN Function
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Feb. 15, 2005
2/10
Connection Diagram
SOP-8L
Vout
GND
( Top View )
2
1
3
EN
Vin
4
5
Vout
7
Vout
Vout
6
8
Vout
5 PIN TO252/TO263
5
3
1
Vin
Vout
GND
Tab is Vout
( Top View )
2
4
EN
NC
5 PIN TO220
Tab is Vout
Vin
Vout
GND
5
3
1
2
4
EN
NC
Pin Descriptions
NAME
FUNCTION
GND Ground.
Vout
The output of the regulator. A minimum of 10uF capacitor must be connected from this pin
to ground to insure stability.
Vin
The input pin of regulator. Typically a large storage capacitor is connected from this pin to
ground to insure that the input voltage does not sag below the minimum dropout voltage
during the load transient response. This pin must always be 1.3V higher than Vout in order
for the device to regulate properly.
EN
The input pin of regulator. TTL/CMOS compatible input Logic high = disable output, Logic
Low or open = output enable. (internal pull-down resistor~100 K).
NC No
connection.
AP1118
1A Positive Low Dropout Fixed-Mode Regulator With EN Function
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Feb. 15, 2005
3/10
Absolute Maximum Ratings
Characteristics
Symbol
Values
Unit
DC Supply Voltage
Vin
-0.3 to 18
V
Enable Pin Voltage
V
EN
7 V
Power Dissipation
P
D
Internally
Limited
Storage Temperature
T
ST
-65 to +150
oC
Operating Junction Temperature Range
T
OP.
0 to +150
oC
Electrical Characteristics
(Under Operating Conditions)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
AP1118-1.5
I
OUT
= 10mA, T
J
= 25
o
C,
3VV
IN
15V
1.470
1.500 1.530 V
AP1118-1.8
I
OUT
= 10mA, T
J
= 25
o
C,
3.3VV
IN
15V
1.764
1.800 1.836 V
AP1118-2.5
I
OUT
= 10mA, T
J
= 25
o
C,
4VV
IN
15V
2.450
2.500 2.550 V
AP1118-3.3
I
OUT
= 10mA, T
J
= 25
o
C,
4.8VV
IN
15V
3.235
3.300 3.365 V
AP1118-5.0
I
OUT
= 10mA, T
J
= 25
o
C,
6.5VV
IN
15V
4.900
5.000 5.100 V
AP1118-9.0
I
OUT
= 10mA, T
J
= 25
o
C,
10.5VV
IN
18V
8.820
9.000 9.180 V
Output Voltage
AP1118-12.0
I
OUT
= 10mA, T
J
= 25
o
C,
13.5VV
IN
18V
11.760
12.000 12.240
V
Line Regulation
AP1118-XXX
I
O
=10mA,V
OUT
+1.5V<V
IN
<18V,
T
J
=25
o
C
0.2
%
AP1118-1.5
V
IN
=3V, 0mA<Io<1A,
T
J
=25
o
C (Note 1,2)
12 15
mV
AP1118-1.8
V
IN
=3.3V, 0mA<Io<1A,
T
J
=25
o
C (Note 1,2)
15 18
mV
AP1118-2.5
V
IN
=4V, 0mA<Io<1A,
T
J
=25
o
C (Note 1,2)
20 25
mV
AP1118-3.3
V
IN
= 5V, 0I
OUT
1A,
T
J
=25
o
C (Note 1,2)
26 33
mV
AP1118-5.0
V
IN
= 8V, 0I
OUT
1A,
T
J
=25
o
C (Note 1,2)
40 50
mV
AP1118-9.0
V
IN
=12V, 0I
OUT
1A,
T
J
=25
o
C (Note 1,2)
70 90
mV
Load Regulation
AP1118-12.0
V
IN
=15V, 0I
OUT
1A,
T
J
=25
o
C (Note 1,2)
100
120
mV
Dropout Voltage
(V
IN
-V
OUT
)
AP1118- 1.5/1.8
2.5/3.3/5.0/9.0/12
I
OUT
= 1A ,
V
OUT
=0.1V
1.3
1.4 V
AP1118
1A Positive Low Dropout Fixed-Mode Regulator With EN Function
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Feb. 15, 2005
4/10
Electrical Characteristics(Continued)
(Under Operating Conditions)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
Current Limit
AP1118- 1.5/1.8
2.5/3.3/5.0/9.1/12
(V
IN
-V
OUT
) = 5V
1. 1
A
Minimum Load Current
AP1118-XXX
0
o
CTj125
o
C
5 10
mA
Logic Low (ON)
0.8
V
EN
Enable Input Voltage
Logic High (OFF)
1.6
V
V
EN
= 0.8V
10
I
EN
Enable Input Current
V
EN
= 2.0V
80
A
Thermal Regulation
T
A
=25
O
C, 30ms pulse
0.008
0.04
%/W
F=120Hz,C
OUT
=25uF Tantalum, I
OUT
=1A
Ripple Rejection
AP1118-XXX V
IN
=V
OUT
+3V
60
70
dB
Temperature Stability
I
O
=10mA
0.5 %
JA
Thermal Resistance
Junction-to-Ambient(No
heat sink ;No air flow)
SOP-8L
TO-252-5L
TO-220-5L
TO263-5L
150
102
85
90
O
C/W
JC
Thermal Resistance
Junction-to-Case
SOP-8L
TO-252-5L
TO-220-5L
TO263-5L
: Control Circuitry/Power Transistor
25
15
0.65/2.7
3.5
O
C/W
Note1: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are
measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead =
1/18" from the package.
Note2: Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the
input/output differential and the output current. Guaranteed maximum power dissipation will not be available over the full
input/output range.
Note3: Quiescent current is defined as the minimum output current required to maintain regulation. At 12V input/output differential the
device is guaranteed to regulate if the output current is greater than 10mA.
AP1118
1A Positive Low Dropout Fixed-Mode Regulator With EN Function
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Feb. 15, 2005
5/10
Typical Performance Characteristics
Temperature (
o
C)
Percent Change in Output Voltage vs Temperature
Output Voltage Change (%)
-50
-25
0
25
50
75
100
125
150
- 2
-1.5
- 1
-0.5
0
0. 5
1
1.5
2
Input Voltage (V)
Line Regulation
Output Voltage Deviation (%)
0
0.2
0.4
0.6
0.8
1
2
4
6
8
10
12
TIME (us)
Line Transient Response
Output Voltage Deviati
on (mV)
Input Voltage (V)
-40
-20
0
20
40
5.5
6.5
7.5
Cin=1uF
Cout=10uF Tantalum
0
20
40
60
80
100 120 140 160 180 200
TIME (us)
Load Transient Response
Load Current (A)
Output Voltage Deviation (mV)
0
10
20 30
40
50
60
70
80
90 100
-1
0
1
2
-20
-10
0
10
20
30
C in = 1uF
C out = 10 uF Tantalum
Preload = 100mA
Output Current (mA)
Dropout Voltage vs Output Current
Dropout Voltage (V)
0
0. 2
0. 4
0. 6
0. 8
1. 0
1. 2
1. 4
1. 6
1. 8
2. 0
0
250
500
750
1000
Tj = 125
o
C
Tj = 25
o
C
Temperature (
o
C)
Load Regulation vs Temperature
Output Voltage Deviation (%)
-25
0
25
50
75
100
125
- 1
-0.80
-0.40
-0.20
0
0.20
I load=800mA
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