AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122 Rev. 8 1 of 12 MAY 2009
www.diodes.com © Diodes Incorporat ed
• 1.3V maximum dropout at full load current
• Fixed 1.2V± 2% output voltage
• Fast transient response
• Output current limiting
• Built-in thermal shutdown
• Good noise rejection
• Packages: SOT223-3L, TO252-3L, SOT89-3L,
TO263-3L and TO220-3L
• SOT223-3L and TO252-3L: Available in “Green”
Molding Compound (No Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 2)
AP1122 is a low dropout positive fixed-mode regulator with
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 1.2V logic
supply. AP1122 is also well suited for other applications such as
VGA cards. AP1122 is guaranteed to have lower than
1.3V dropout at full load current making it ideal to provide
well-regulated outputs of 1.2 output voltage with 2.5V input
voltage supply.
Applications
• PC peripheral
• Communication
Typical Application Circuit
C2
100uF
2.5V
1.2V/1A
Tab is VOUT
VIN
VOUT
GND
C1
100uF
Features General Description
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122 Rev. 8 2 of 12 MAY 2009
www.diodes.com © Diodes Incorp orated
Lead-free
Lead-free
Lead-free
Lead-free
Lead-free
Lead-free
Lead-free
Lead-free
Ordering Information
E : SOT223-3L
D : TO252-3L
Y : SOT89-3L
Package
L : Lead Free (Note 1)
AP 1122 X X - X
Lead Free Packing
U : Tube
13 : Tape & Reel
G : Green
K : TO263-3L
T : TO220-3L
Device Package
Code Packaging
(Note 3)
Tube 13” Ta pe and Reel
Quantity Part Number
Suffix Quantity Part Number
Suffix
AP1122EG-U E SOT223-3L 75 -U NA NA
AP1122EG-13 E SOT223-3L NA NA 2500/Tape & Reel -13
AP1122EL-U E SOT223-3L 75 -U NA NA
AP1122EL-13 E SOT223-3L NA NA 2500/Tape & Reel -13
AP1122DG-U D TO252-3L 80 -U NA NA
AP1122DG-13 D TO252-3L NA NA 2500/Tape & Reel -13
AP1122DL-U D TO252-3L 80 -U NA NA
AP1122DL-13 D TO252-3L NA NA 2500/Tape & Reel -13
AP1122YL-13 Y SOT89-3L NA NA 2500/Tape & Reel -13
AP1122KL-U K TO263-3L 50 -U NA NA
AP1122KL-13 K TO263-3L NA NA 800/Tape & Reel -13
AP1122TL-U T TO220-3L 50 -U NA NA
Notes: 1. SOT89-3L, TO263-3L and TO220-3L are available in “Lead Free” products only.
2. EU Directive 2002/95/EC (RoHS). All applicable RoHS exempt ions a pplied. Please visit our website at
http://www.diodes.com/products/lead_free.html
3. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122 Rev. 7 3 of 12 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
Pin Assignment
(1) SOT223-3L (2) TO252-3L/ TO263-3L
VOUT
GND
Tab is VOUT
( Top View )
3
2
1
VIN
3
2
1
VIN
VOUT
GND
Tab is VOUT
( Top View )
(3) SOT89-3L (4) TO220-3L
GND
VOUT
VIN
1
3
2
Tab is VOUT
( Top View )
Tab is VOUT
3VIN
2
1
VOUT
GND
( Top View)
Pin Descriptions
Pin Name I/O Pin # Description
GND I 1 Ground Pin
VOUT O 2
The output of the regu lator. A minimum of 10 uF capacitor (0.15Ω ≤ ESR ≤ 20Ω)
must be connected from this pin to ground to insure stability.
VIN I 3
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 t he
minimum dropout voltage during the load transient response.
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122 Rev. 8 4 of 12 MAY 2009
www.diodes.com © Diodes Incorporated
Block Diagram
3
Thermal
Shutdown 1
2 VOUT
GND
1.2V +
+
CURRENT
LIMIT
VIN
+
+
Absolute Maximum Ratings
Symbol Parameter Rating Unit
VIN DC Supply Voltage -0.3 to 12 V
TST Storage Temperature -65 to +150 oC
TMJ Maximum Junction Temperature 150 oC
Recommended Operating Conditions
Symbol Parameter Min Max Unit
IOUT Output Current - 1.0 A
TOP Operating Junction Temperature Range 0 125 oC
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122 Rev. 8 5 of 12 MAY 2009
www.diodes.com © Diodes Incorporated
Electrical Characteristics (Under Operating Conditions)
Parameter Conditions Min Typ. Max Unit
Output Voltage 2.5V≦VIN≦12V, IO=10mA, TA=25oC 1.176 1.2 1.224 V
Line Regulation 2.5V≦VIN≦12V, IO=10mA, TA=25oC 0.2 %
Load Regulation VIN=2.5V~12 V, 10 mA<I o< 1 A, TA=25oC (Note 4, 5) 1 %
Dropout Volt age
(VIN-VOUT) IOUT = 1A ,ΔVOUT = 1%VOUT 1.3 V
Current Limit (VIN-VOUT) = 5V 1. 1 A
Minimum Load Current
(Note 6) 0oC≦TJ≦125oC 5 10 mA
Therm al Re g u la ti o n TA=25oC, 30ms puls e 0.00 8 0.04 %/W
Ripple Rejection F=120Hz,COUT=25uF Tantalum, IOUT=1A, VIN=VOUT+3V 60 70 dB
Temperature Stability IO=10mA 0.5 %
JA
θ
Thermal Re si sta n c e
Junction-to-Ambient
SOT89-3L: Control Circuitry/Power Transistor (Note 7)
SOT223-3L: Control Circuitry/Power Transistor (Note 8)
TO252-3L: Control Circuitry/Power Transistor (Note 7)
TO220-3L: Control Circuitry/Power Transistor (Note 7)
TO263-3L: Control Circuitry/Power Transistor (Note 7)
182
107
73
78
60
oC/W
JC
θ
Thermal Re si sta n c e
Junction-to-Case
SOT89-3L: Control Circuitry/Power Transistor (Note 7)
SOT223-3L: Control Circuitry/Power Transistor (Note 8)
TO252-3L: Control Circuitry/Power Transistor (Note 7)
TO220-3L: Control Circuitry/Power Transistor (Note 7)
TO263-3L: Control Circuitry/Power Transistor (Note 7)
42
16
12
3.5
3.5
oC/W
Notes: 4. See thermal regulation specifications for changes in output voltage due to heating effe cts. 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.
5. 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.
6. Quiescent current is defined as the minimum output current required in maintaining regulation. At 12V input/output differe nt ial the device is
guaranteed to regulate if the output current is greater than 10mA.
7. Test conditions for SOT89-3L, TO252-3L, TO220-3L, and TO263-3L: Devices mounted on FR-4 substrate, single sided PC board, 2oz copper,
with minimum recommended pad layout, no air flow.
8. Test condition for SOT223-3L: Device mounted on FR-4 substrate, single sided PC board, 2oz copper, with 5mmX5mm thermal pad layout, no
air flow.
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122 Rev. 8 6 of 12 MAY 2009
www.diodes.com © Diodes Incorporated
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
24
6 8 10 12
TIME (us)
Line Transient Respo nse
Output Voltage Deviation (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 Transie nt Response
Load Current (A) Output V o ltage Dev iation (m V)
010
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 Tant alum
Preload = 100mA
Temperature (
o
C)
Load Regulation vs T emperature
Output Voltage Deviation (%)
-25 0 25 50 75 100 125
- 1
-0.80
-0.40
-0.20
0
0.20
I load=800mA
Dropout Voltage vs Output Current
Output Current (mA)
Dropout Voltage (V)
0
0. 2
0. 4
0. 6
0. 8
1. 0
1. 2
1. 4
1. 6
1. 8
2. 0
0250 500 750 1000
Tj = 1 25
o
C
Tj = 25
o
C
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122 Rev. 8 7 of 12 MAY 2009
www.diodes.com © Diodes Incorporated
Marking Information
(1) SOT223-3L
Y W X
1 1 2 2
Logo
( Top View )
X : Internal code
a~z : Lead Free
A~Z : Green
Y : Year : 0~9
W : Week : A~Z : 1~26 week;
a~z : 27~52 week;
z repersents 52 and 53 week
Part Number
(2) TO252-3L
1 1 2 2
X : Internal Code
WW : Week : 01~52, 52 represents
YY : Year : 01~09
( Top View )
YY WW X X
Logo
L : Lead Free
G : Green
52 and 53 week
Part Number
(3) SOT89-3L
1 32
X X
Y W
XX : Identification code
( Top View )
X
Y : Year : 0~9
W : Week : A~Z : 1~26 week;
X : Internal code
a~z : 27~52 week;
z represents 52 and 53 wee k
a~z : Lead Free
Marking Code Table
Identification code Output version
JB AP1122
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122 Rev. 8 8 of 12 MAY 2009
www.diodes.com © Diodes Incorporated
Marking Information (Continued)
(4) TO263-3L
1 1 2 2
X : Internal code
YY : Year : 01~09
( Top View )
YY WW X XWW : Week : 01~52, 52 represents
Logo
52 and 53 week
L : Lead Free
Part Number
(5) TO220-3L
( Top View )
1 1 2 2
Logo
YY WWX X
Part Number
X : Internal code
WW : Week : 01~52, 52 represents
YY : Year : 01~09
52 and 53 week
L : Lead Free
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122 Rev. 8 10 of 12 MAY 2009
www.diodes.com © Diodes Incorporat ed
(2) TO252-3L
5.20/5.50 Typ 5.35
6.354/6.80 Typ 6.58
2.28
BSC.
0.61 Ty p
0.88/1.27
4.57 BS C. 9.00/10 .40 T yp 9. 70
SEATING
PLANE
SEE NOTE2
0.51
5.6
11.0
5.6
2.0
2.25
Land Pattern Recommendation (Unit: mm)
7.2
1.2
2.18/2.40
Typ 2.29
0.45/0.58
Typ 0.52
0.64/1.02
Typ 0.83
0.45/0.58
Typ 0.52
0.89/
1.14
5.40/6.20
Typ 5.57
(3) SOT89-3L
0.80/
1.20 2.35/2.60 Typ 2.48
1.40/1.75
Typ 1.60
2.90/3.10
Typ 3.00
1.40/1.60
Typ 1.50
4.40/4.60 Typ 4.50
0.41/0.53
Typ 0.47
0.36/0.48
Typ 0.42
80(2x)
1.7
0.4
0.9
2.7
1.3
1.9
50(2x)
Land Pattern Recommendation (Unit: mm)
1.5
0.36/0.48
Typ 0.42
1.45/1.55
Typ 1.50
0.35/0.43
Typ 0.39
3.94/4.25
Package Information (Continued)
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122 Rev. 8 11 of 12 MAY 2009
www.diodes.com © Diodes Incorporat ed
(4) TO263-3L
9.65/10.29 Typ 9.97
2.54
BSC.
2.92
Typ 1.30
0.51/0.99 Typ 0.75
1.14/1.40 Typ1.27
8.65/9.65 Typ 9.15
1.27/
1.78
Typ
1.52 14.61/15.88 Typ 15.2 4
4.06/4.83
Typ 4.45
1.14/1.40
Typ 1.27
2.28/2.80 Typ 2.54
1.3
3
15.7
10.9
9.1
Land Pattern Recom m endation (Unit: mm )
2.54
0.38 Typ
(5) TO220-3L 3.55/4.85
Typ 4.20 0.51/1.40
Typ 0.95
0.31/1.14
Typ 0.72
SEATING PLANE
14.20/16.50
Typ 15.35
9.70/10.70
Typ 10.20
12.72/14.72
Typ 13.72
0.51/1.14
Typ 0.83
4.83/5.33
Typ 5.08
1.14/1.78
Typ 1.46
Ø3.53/4.09
Typ 3.81
5.84/6.86
Typ 6.35
2.54/3.43
Typ 2.98
3.66/6.35
Typ 5.00
2.03/2.92
Typ2.48
2.99/2.79
Typ 2.54
Package Information (Continued)
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122 Rev. 8 12 of 12 MAY 2009
www.diodes.com © Diodes Incorporat ed
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Diodes Inc orporated product s are spec ificall y not authorized for use as criti cal components in life support devi ces or systems without
the express written approva l of t he Chief Exec ut ive Officer of Diod es Inc o rpo rated. As used herei n :
A. Life support devices or systems are devices or systems which:
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2. support or sust ai n lif e and whose f ailure to perform when properly used in accordance with ins t ruc t i ons for use provided
in the labeli ng can be reas onably expected to result in signi f ic a nt i njury t o t h e user.
B. A critic al componen t is any component i n a life support device or syst em whose failu re to perform can be reasonably expec ted
to cause the failure of the life support device or to affect its safety or effectiveness.
Custom ers repres ent that they have all necessary expertis e in the safety and regulator y ramific ations of their life support devic es or
systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements
concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,
notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,
Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes
Incorporated products in such safety-critical, life support devices or systems.
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