1A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Features
- 1.4V maximum dropout at full load current
- Fast transient response
- Output current limiting
- Built-in thermal shutdown
- Packages: SOT223, TO263, TO252, TO220,
SOT89
- Good noise rejection
- 3-Terminal Adjustable or Fixed 1.5V, 1.8V, 1.9V,
2.5V, 3.3V, 5.0V
General Description
AP1117 is a low dropout positive adjustable or
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.
AP1117 is also well suited for other applications
such as VGA cards. AP1117 is guaranteed to have
lower than 1.4V dropout at full load current making
it ideal to provide well-regulated outputs of 1.25 to
5.0 with 6.4V to 12V input supply.
Applications
- PC peripheral
- Communication
Ordering Information
AP 1117 X XX X X
Low Dropout Regulator
Package
E : SOT223-3L
K : TO263-3L
D : TO252-3L
T : TO220-3L
Y : SOT89-3L
Vout
Lead Free
Packing
Blank : Tube
A : Taping
Blank : ADJ Blank : Normal
15 : 1.5V
L : Lead Free Package
18 : 1.8V
19: 1.9V
25 : 2.5V
33 : 3.3V
50 : 5.0V
5V
Typical Circuit
5V
C1
100uF
Vin
Vout
GND
Tab is Vout
3.3V/1A
C2
100uF
C1
100uF
Vin
Vout
Adj
Tab is Vout
R1
121
Ω
R2
121
Ω
V
o
2.5V/1A
C2
100uF
( 5V/3.3V fixed output )
( 5V/2.5V ADJ output )
Note: V
o
=
V
REF
∗
(1
+
R
2
)
R
1
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.1.0 Aug 17, 2004
1/11
AP1117
1A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Connection Diagram
3 PIN SOT223
( Top View )
3
2
1
Tab is Vout
Vin
Vout
Adj (GND)
1
Tab is Vout
3 PIN SOT89
3 PIN TO220
Adj (GND)
3 PIN TO252 / TO263
( Top View )
3
2
Vin
Vout
3
2
1
Tab is Vout
Vin
Vout
Adj (GND)
3
2
1
Tab is Vout
Vin
Vout
Adj (GND)
Block Diagram
Vin
3
2
Vout
+
+
－
CURRENT
LIMIT
1.25V
+
1
+
－
Thermal
Shutdown
GND
(FIXED)
1
Adj
Anachip Corp.
www.anachip.com.tw
2/11
Rev.1.0 Aug 17, 2004
AP1117
1A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Pin Descriptions
NAME
I/O
PIN #
FUNCTION
Adj (GND)
I
1
A resistor divider from this pin to the Vout pin and ground sets the
output voltage. (Ground only for Fixed-Mode)
The output of the regulator. A minimum of 10uF capacitor (0.15Ω
≤
ESR
≤
20Ω) must be connected from this pin to ground to insure
stability.
The input pin of regulator. Typically a large storage capacitor
(0.15Ω
≤
ESR
≤
20Ω) 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.
Vout
O
2
Vin
I
3
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
Vin
P
D
T
ST
T
OP
DC Supply Voltage
Power Dissipation
Storage Temperature
Operating Junction Temperature Range
-0.3 to 12
Internally Limited
-65 to +150
0 to +150
V
oC
oC
Anachip Corp.
www.anachip.com.tw
3/11
Rev.1.0 Aug 17, 2004
AP1117
1A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Electrical Characteristics
(Under Operating Conditions)
PARAMETER
Reference Voltage
AP1117-ADJ
AP1117-1.5
AP1117-1.8
AP1117-1.9
Output Voltage
AP1117-2.5
AP1117-3.3
AP1117-5.0
Line Regulation
AP1117-XXX
AP1117-ADJ
AP1117-1.5
AP1117-1.8
Load Regulation
AP1117-1.9
AP1117-2.5
AP1117-3.3
AP1117-5.0
Dropout Voltage
(V
IN
-V
OUT
)
CONDITIONS
T
J
=25
o
C,(V
IN
-
OUT
)=1.5V
I
O
=10mA
I
OUT
= 10mA, T
J
= 25
o
C,
3V≦V
IN
≦12V
o
I
OUT
= 10mA, T
J
= 25 C,
3.3V≦V
IN
≦12V
I
OUT
= 10mA, T
J
= 25
o
C,
3.3V≦V
IN
≦12V
I
OUT
= 10mA, T
J
= 25
o
C,
4V≦V
IN
≦12V
I
OUT
= 10mA, T
J
= 25
o
C,
4.8V≦V
IN
≦12V
I
OUT
= 10mA, T
J
= 25
o
C,
6.5V≦V
IN
≦12V
I
O
=10mA,V
OUT
+1.5V<V
IN
<12V,
T
J
=25
o
C
V
IN
=3.3V,Vadj=0,0mA<Io<1A,
T
J
=25
o
C (Note 1,2)
V
IN
=3V, 0mA<Io<1A,
T
J
=25
o
C (Note 1,2)
V
IN
=3.3V, 0mA<Io<1A,
T
J
=25
o
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,
T
J
=25
o
C (Note 1,2)
V
IN
= 5V, 0≦I
OUT
≦1A,
o
T
J
=25 C (Note 1,2)
V
IN
= 8V, 0≦I
OUT
≦1A,
T
J
=25
o
C (Note 1,2)
MIN
1.225
1.470
1.764
1.862
2.450
3.235
4.900
TYP
1.250
1.500
1.800
1.900
2.500
3.300
5.000
MAX
1.275
1.530
1.836
1.938
2.550
3.365
5.100
0.2
1
12
15
16
20
26
40
1.3
1. 1
5
0.008
60
0.5
300
117
92
85
100
15
0.65/2.7
10
0.65/2.7
10
0.04
70
15
18
19
25
33
50
1.4
UNIT
V
V
V
V
V
V
V
%
%
mV
mV
mV
mV
mV
mV
V
A
mA
%/W
dB
%
O
AP1117-ADJ/1.5/1.8
I
OUT
= 1A ,∆V
OUT
=0.1%V
OUT
/1.9/2.5/3.3/5.0
AP1117-ADJ/1.5/1.8
(V
IN
-V
OUT
) = 5V
Current Limit
/1.9/2.5/3.3/5.0
o
o
0 C≦Tj≦125 C
Minimum Load Current
AP1117-XXX
o
Thermal Regulation
T
A
=25 C, 30ms pulse
F=120Hz,C
OUT
=25uF Tantalum, I
OUT
=1A
Ripple Rejection
AP1117-XXX
V
IN
=V
OUT
+3V
Temperature Stability
I
O
=10mA
θ
JA
Thermal Resistance SOT89
SOT-223
Junction-to-Ambient(No TO-252
heat sink ;No air flow)
TO-220/263
SOT89 : Control Circuitry/Power Transistor
θ
JC
Thermal Resistance SOT-223 : Control Circuitry/Power Transistor
TO-263 : Control Circuitry/Power Transistor
Junction-to-Case
TO-252 : Control Circuitry/Power Transistor
TO-220 : Control Circuitry/Power Transistor
C/W
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 difference between
input and 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 in maintaining 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
4/11
Rev.1.0 Aug 17, 2004
AP1117
1A Low Dropout Positive Adjustable or Fixed-Mode Regulator
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ADI Reference Circuit
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