1A Positive Low Dropout Fixed-Mode Regulator With EN Function
Features
•
1.4V
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.
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..
Ordering Information
AP 1118 X XX X X
Low Dropout Regulator
Package
D : TO252-5L
T : TO220-5L
K : TO263-5L
S : SOP-8L
Vout
15 : 1.5V
18 : 1.8V
25 : 2.5V
33 : 3.3V
50 : 5.0V
90 : 9.0V
12 : 12V
Lead Free
Blank : Normal
L : Lead Free Package
Packing
Blank : Tube
A : Taping
Typical Circuit
5V
C1
100uF
Vin
EN
Tab is Vout
Vout
NC
GND
C2
100uF
3.3V/1A
( 5V/3.3V fixed output )
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
1/10
Feb. 15, 2005
Not Recommended for New Design
AP1118
1A Positive Low Dropout Fixed-Mode Regulator With EN Function
Connection Diagram
5 PIN TO220
5 PIN TO252/TO263
( Top View )
5
Vin
EN
Vout
NC
GND
Tab is Vout
4
3
2
1
Vin
EN
Vout
NC
GND
5
4
3
2
1
Tab is Vout
SOP-8L
( Top View )
Vout
Vout
Vout
Vout
5
6
7
8
4
3
2
1
Vin
EN
Vout
GND
Pin Descriptions
NAME
GND
Vout
Ground.
The output of the regulator. A minimum of 10uF capacitor must be connected from this pin
to ground to insure stability.
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.
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).
No connection.
FUNCTION
Vin
EN
NC
Anachip Corp.
www.anachip.com.tw
2/10
Rev.1.1
Feb. 15, 2005
Not Recommended for New Design
AP1118
1A Positive Low Dropout Fixed-Mode Regulator With EN Function
Absolute Maximum Ratings
Characteristics
DC Supply Voltage
Enable Pin Voltage
Power Dissipation
Storage Temperature
Operating Junction Temperature Range
Symbol
Vin
V
EN
P
D
T
ST
T
OP.
Values
-0.3 to 18
7
Internally Limited
-65 to +150
0 to +150
oC
oC
Unit
V
V
Electrical Characteristics
(Under Operating Conditions)
PARAMETER
AP1118-1.5
AP1118-1.8
AP1118-2.5
Output Voltage
AP1118-3.3
AP1118-5.0
AP1118-9.0
AP1118-12.0
Line Regulation
AP1118-XXX
AP1118-1.5
AP1118-1.8
AP1118-2.5
Load Regulation
AP1118-3.3
AP1118-5.0
AP1118-9.0
AP1118-12.0
Dropout Voltage
(V
IN
-V
OUT
)
AP1118- 1.5/1.8
2.5/3.3/5.0/9.0/12
CONDITIONS
I
OUT
= 10mA, T
J
= 25 C,
3V≦V
IN
≦15V
o
I
OUT
= 10mA, T
J
= 25 C,
3.3V≦V
IN
≦15V
o
I
OUT
= 10mA, T
J
= 25 C,
4V≦V
IN
≦15V
I
OUT
= 10mA, T
J
= 25
o
C,
4.8V≦V
IN
≦15V
I
OUT
= 10mA, T
J
= 25
o
C,
6.5V≦V
IN
≦15V
o
I
OUT
= 10mA, T
J
= 25 C,
10.5V≦V
IN
≦18V
o
I
OUT
= 10mA, T
J
= 25 C,
13.5V≦V
IN
≦18V
I
O
=10mA,V
OUT
+1.5V<V
IN
<18V,
o
T
J
=25 C
V
IN
=3V, 0mA<Io<1A,
o
T
J
=25 C (Note 1,2)
V
IN
=3.3V, 0mA<Io<1A,
T
J
=25
o
C (Note 1,2)
V
IN
=4V, 0mA<Io<1A,
o
T
J
=25 C (Note 1,2)
V
IN
= 5V, 0≦I
OUT
≦1A,
T
J
=25
o
C (Note 1,2)
V
IN
= 8V, 0≦I
OUT
≦1A,
T
J
=25
o
C (Note 1,2)
V
IN
=12V, 0≦I
OUT
≦1A,
o
T
J
=25 C (Note 1,2)
V
IN
=15V, 0≦I
OUT
≦1A,
o
T
J
=25 C (Note 1,2)
I
OUT
= 1A ,
∆V
OUT
=0.1V
o
MIN
1.470
1.764
2.450
3.235
4.900
8.820
11.760
TYP
1.500
1.800
2.500
3.300
5.000
9.000
12.000
MAX
1.530
1.836
2.550
3.365
5.100
9.180
12.240
0.2
UNIT
V
V
V
V
V
V
V
%
mV
mV
mV
mV
mV
mV
mV
V
12
15
20
26
40
70
100
1.3
15
18
25
33
50
90
120
1.4
Anachip Corp.
www.anachip.com.tw
3/10
Rev.1.1
Feb. 15, 2005
Not Recommended for New Design
AP1118
1A Positive Low Dropout Fixed-Mode Regulator With EN Function
Electrical Characteristics(Continued)
PARAMETER
Current Limit
Minimum Load Current
V
EN
I
EN
Thermal Regulation
Ripple Rejection
Temperature Stability
AP1118- 1.5/1.8
2.5/3.3/5.0/9.1/12
AP1118-XXX
Enable Input Voltage
Enable Input Current
T
A
=25
O
C, 30ms pulse
F=120Hz,C
OUT
=25uF Tantalum, I
OUT
=1A
AP1118-XXX
I
O
=10mA
V
IN
=V
OUT
+3V
CONDITIONS
(V
IN
-V
OUT
) = 5V
0 C≦Tj≦125 C
Logic Low (ON)
Logic High (OFF)
V
EN
= 0.8V
V
EN
= 2.0V
o
o
(Under Operating Conditions)
MIN
1. 1
5
1.6
10
80
0.008
60
0.5
150
102
85
90
25
15
0.65/2.7
3.5
0.04
70
10
0.8
TYP
MAX
UNIT
A
mA
V
µA
%/W
dB
%
θ
JA
Thermal Resistance SOP-8L
Junction-to-Ambient(No
heat sink ;No air flow)
TO-252-5L
TO-220-5L
TO263-5L
SOP-8L
O
C/W
θ
JC
Thermal Resistance TO-252-5L
Junction-to-Case
TO-220-5L
TO263-5L
: Control Circuitry/Power Transistor
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.
Anachip Corp.
www.anachip.com.tw
4/10
Rev.1.1
Feb. 15, 2005
Not Recommended for New Design
AP1118
1A Positive Low Dropout Fixed-Mode Regulator With EN Function
电源技术
