AP1115
0.6A Low Dropout Positive Adjustable or Fixed-Mode Regulator
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 Aug.27, 2004
1/7
Features
1.3V maximum dropout at full load current
Fast transient response
Output current limiting
Built-in thermal shutdown
Packages: SOT89, TO92
Good noise rejection
3-Terminal Adjustable or Fixed 1.5V / 1.8V / 2.5V
/ 2.8V / 3.0V / 3.3V / 3.5V / 5.0V
Applications
PC peripheral
Communication
General Description
AP1115 is a low dropout positive adjustable or
fixed-mode regulator with minimum of 0.6A 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.
AP1115 is also well suited for other applications
such as VGA cards. AP1115 is guaranteed to have
<1.3V dropout at full load current making it ideal to
provide well regulated outputs of 1.25V to 5V with
up to 18V input supply.
Connection Diagram (Top View)
Adj (GND)
AP1115B-3 PIN SOT89
Vout
Vin
Tab is Pin2
Adj (GND)
AP1115A-3 PIN SOT89
Vout
Vin
Tab is Pin2
1
2
3
1
2
3
AP1115A-3 PIN TO92
1 Vin
2 GND
3 Vout
AP1115B-3 PIN TO92
1 GND
2 Vin
3 Vout
Pin Descriptions
NAME
I/O
FUNCTION
Adj
(GND)
I
A resistor divider from this pin to the Vout pin and ground sets the output voltage.
(Ground only for Fixed-Mode)
Vout O
The output of the regulator. A minimum of 10uF capacitor (0.15 ESR 20)
must be connected from this pin to ground to insure stability.
Vin I
The input pin of regulator. Typically a large storage capacitor (0.15 ESR
20) 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.
AP1115
0.6A Low Dropout Positive Adjustable or Fixed-Mode Regulator
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 Aug.27, 2004
2/7
Ordering Information
AP 1115 X X XX X X
Low Dropout Regulator
Package
Vout
Y : SOT89-3L
V : TO92-3L
Blank : ADJ
15 : 1.5V
18 : 1.8V
25 : 2.5V
28 : 2.8V
30 : 3.0V
33 : 3.3V
35 : 3.5V
50 : 5.0V
Packing
Blank : Tube
A : Taping
Lead Free
Blank : Normal
L : Lead Free Package
Pin Version
A: Pin1:Vout
2:Adj(GND)
3:Vin
B: Pin1:Adj(GND)
2:Vin
3:Vout
Typical Circuit
C2
100uF
5V
3.3V/0.5A
Vin
Vout
GND
C1
100uF
AP1115A (5V/3.3V fixed output)
)
1
2
REF
o
R
R
(1
V
V
+
=
Note:
Vin
Vout
GND
AP1115B (5V/3.3V fixed output)
5V
C1
100uF
C2
100uF
3.3V/0.5A
R1
121O
R2
121O
C2
100uF
5V
2.5V/0.5A
Vin
Vout
Adj
C1
100uF
V
O
AP1115A (5V/2.5V Adj output)
R2
121O
R1
121O
C2
100uF
5V
2.5V/0.5A
Vin
Vout
Adj
C1
100uF
V
O
AP1115B (5V/2.5V Adj output)
AP1115
0.6A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Aug.27, 2004
3/7
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
V
IN
DC Supply Voltage
-0.3 to 18 V
V
P
D
Power Dissipation
Internally Limited
T
ST
Storage Temperature
-65 to +150
o
C
T
OP
Operating Junction Temperature Range
0 to +150
o
C
Electrical Characteristics
(Under Operating Conditions)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
Reference Voltage
AP1115-ADJ
T
J
=25
o
C,(V
IN
-
OUT
)=1.5V
I
O
=10mA
1.225
1.250 1.275
V
AP1115-1.5
I
OUT
= 10mA, T
J
= 25
o
C,
3VV
IN
12V
1.470
1.500 1.530
V
AP1115-1.8
I
OUT
= 10mA, T
J
= 25
o
C,
3.3VV
IN
12V
1.764
1.800 1.836
V
AP1115-2.5
I
OUT
= 10mA, T
J
= 25
o
C,
4VV
IN
12V
2.450
2.500 2.550
V
AP1115-2.8
I
OUT
= 10mA, T
J
= 25
o
C,
4.3VV
IN
12V
2.744
2.800 2.856
V
AP1115-3.0
I
OUT
= 10mA, T
J
= 25
o
C,
4.5VV
IN
12V
2.940
3.000 3.060
V
AP1115-3.3
I
OUT
= 10mA, T
J
= 25
o
C,
4.8VV
IN
12V
3.235
3.300 3.365
V
AP1115-3.5
I
OUT
= 10mA, T
J
= 25
o
C,
5VV
IN
12V
3.430
3.500 3.570
V
Output Voltage
AP1115-5.0
I
OUT
= 10mA, T
J
= 25
o
C,
6.5VV
IN
12V
4.900
5.000 5.100
V
Line Regulation
AP1115-XXX
I
O
=10mA,V
OUT
+1.5V<V
IN
<15V,
T
J
=25
o
C
- - 0.2
%
AP1115-ADJ
V
IN
=3.3V,Vadj=0,0mA<Io<0.6A,
T
J
=25
o
C (Note 1,2)
- - 1
%
AP1115-1.5
V
IN
=3V, 0mA<Io<0.6A,
T
J
=25
o
C (Note 1,2)
- 12 15
mV
AP1115-1.8
V
IN
=3.3V, 0mA<Io<0.6A,
T
J
=25
o
C (Note 1,2)
- 15 18
mV
AP1115-2.5
V
IN
=4V, 0mA<Io<0.6A,
T
J
=25
o
C (Note 1,2)
- 20 25
mV
AP1115-2.8
V
IN
=4.3V, 0mA<Io<0.6A,
T
J
=25
o
C (Note 1,2)
- 22 28
mV
AP1115-3.0
V
IN
=5V, 0I
OUT
0.6A,
T
J
=25
o
C (Note 1,2)
- 23 30
mV
AP1115-3.3
V
IN
=5V, 0I
OUT
0.6A,
T
J
=25
o
C (Note 1,2)
- 26 33
mV
AP1115-3.5
V
IN
=5V, 0I
OUT
0.6A,
T
J
=25
o
C (Note 1,2)
- 28 35
mV
Load Regulation
AP1115-5.0
V
IN
=8V, 0I
OUT
0.6A,
T
J
=25
o
C (Note 1,2)
- 40 50
mV
Dropout Voltage
(V
IN
-V
OUT
)
AP1115-ADJ/1.5/1.8
2.5/2.8/3.0/3.3/3.5/5.0
I
OUT
= 0.6A,
V
OUT
=0.1%V
OUT
- 1.1 1.3 V
Current Limit
AP1115-ADJ/1.5/1.8
2.5/2.8/3.0/3.3/3.5/5.0
(V
IN
-V
OUT
) = 5V
0.7
-
-
A
Minimum Load Current
AP1115-XXX
0
o
CTj125
o
C
- 5 10
mA
Thermal Regulation
T
A
=25
o
C, 30ms pulse
-
0.008
0.04
%/W
AP1115
0.6A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Aug.27, 2004
4/7
Electrical Characteristics (Continued)
(Under Operating Conditions)
F=120Hz,C
OUT
=25uF Tantalum, I
OUT
=0.6A
Ripple Rejection
AP1115-XXX V
IN
=V
OUT
+3V -
60
70
dB
Temperature Stability
I
O
=10mA -
0.6
-
%
SOT89
- 300 -
JA
Thermal Resistance Junction-to-Ambient (No
heat sink; No air flow)
TO92 - 160 -
o
C/W
JC
SOT89: Control Circuitry/Power Transistor
Thermal Resistance Junction-to-Case
-
100
-
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 5W. 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.
Marking Information
1
3
2
Date Code
Month: A~L
Year: 0~9
Identification Code
( See the table )
Blank: normal
L: Lead Free Package
XX
XX X
SOT89-3
Identification Code
Part Number
Output
version
AP1115A
AP1115B
ADJ
JO JU
1.5V
JP JV
1.8V
JQ JW
2.5V
JR JX
2.8V
JC JD
3.0V
JM JN
3.3V
JS JY
3.5V
JK JL
5.0V
JT JZ
Year: "1"=2001
"2"=2002
Xth Week: 01~52
1115
Internal code: Blank or A~Z
Part Number: AP1115
Output voltage
A: A version
B: B version
Blank: ADJ
15:1.5V
18:1.8V
25:2.5V
28:2.8V
30:3.0V
33:3.3V
35:3.5V
50:5.0V
X XX
Y WW X X
(Top View)
TO92
1
2
3
Blank: normal
L: Lead Free Package
AP1115
0.6A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Aug.27, 2004
5/7
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
Out
put
V
o
l
t
age Devi
at
i
on (mV
)
I
nput
V
o
l
t
age (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
)
Out
put
V
o
l
t
age Devi
at
i
on (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
100
200
300
400
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=600mA
500
600
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