AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122
Document number: DS31012 Rev. 9 - 2 1 of 11
www.diodes.com May 2010
© Diodes Incorporated
Description
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 suppl y .
Applications
• PC peripheral
• Communication
Features
• 1.3V maximum dropout at full load current
• Fixed 1.2V± 2% output volta ge
• 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
• SOT89-3L, SOT223-3L an d T O252-3L: Available in
“Green” Molding Compound (No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)
Pin Assignments
VOUT
GND
Tab is VOUT
(Top View)
3
2
1
VIN
SOT223-3L
3
2
1
VIN
VOUT
GND
Tab is VOUT
(Top View)
TO252-3L/ TO263-3L
GND
VOUT
VIN
1
3
2
Tab is VOUT
(Top View)
SOT89-3L
Tab is VOUT
3VIN
2
1
VOUT
GND
( Top View)
TO220-3L
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122
Document number: DS31012 Rev. 9 - 2 2 of 11
www.diodes.com May 2010
© Diodes Incorporated
Typical Application Circuit
C2
100uF
2.5V
1.2V/1A
Tab is VOUT
VIN
VOUT
GND
C1
100uF
Pin Descriptions
Pin Name I/O Pin # Description
GND I 1 Ground Pin
VOUT O 2
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.
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 b elow the
minimum dropout voltage during the load transient response.
Functional Block Diagram
3
Thermal
Shutdown 1
2 VOUT
GND
1.2V +
+
CURRENT
LIMIT
VIN
+
+
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122
Document number: DS31012 Rev. 9 - 2 3 of 11
www.diodes.com May 2010
© Diodes Incorporated
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
Electrical Characteristics (Under Operating Conditions)
Parameter Test 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~12V, 10mA<Io<1A, TA=25oC (Note 2, 3) 1 %
Dropout Voltage
(VIN-VOUT) IOUT = 1A ,ΔVOUT = 1%VOUT 1.3 V
Current Limit (VIN-VOUT) = 5V 1. 1 A
Minimum Load Current
(Note 4) 0oC≦TJ≦125oC 5 10 mA
Thermal Regulation TA=25oC, 30ms pulse 0.008 0.04 %/W
Ripple Rejection F=120Hz,COUT=25uF Tantalum, IOUT=1A, VIN=VOUT+3V 60 70 dB
Temperature Stability IO=10mA 0.5 %
θJA Thermal Resistance
Junction-to-Ambient
SOT89-3L: Control Circuitr y/Power Transistor (Note 5)
SOT223-3L: Control Circuitr y/Power Transistor (Note 6)
TO252-3L: Control Circuitry/Power Transistor (Note 5)
TO220-3L: Control Circuitry/Power Transistor (Note 5)
TO263-3L: Control Circuitry/Power Transistor (Note 5)
182
107
73
78
60
oC/W
θJC Thermal Resistance
Junction-to-Case
SOT89-3L: Control Circuitr y/Power Transistor (Note 5)
SOT223-3L: Control Circuitr y/Power Transistor (Note 6)
TO252-3L: Control Circuitry/Power Transistor (Note 5)
TO220-3L: Control Circuitry/Power Transistor (Note 5)
TO263-3L: Control Circuitry/Power Transistor (Note 5)
42
16
12
3.5
3.5
oC/W
Notes: 2. 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.
3. 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.
4. 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.
5. 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.
6. 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
Document number: DS31012 Rev. 9 - 2 4 of 11
www.diodes.com May 2010
© 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
681012
TIME (u s)
Line Transient Response
Outpu t 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 Transient Response
Load Current (A ) Output Voltag e D eviati on (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 Tantalum
Preload = 100mA
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
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 = 125
o
C
Tj = 25
o
C
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122
Document number: DS31012 Rev. 9 - 2 5 of 11
www.diodes.com May 2010
© Diodes Incorporated
Ordering Information
E : SOT223-3L
D : TO252-3L
Y : SOT89-3L
Package L : Lead Free (Note 7)
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 8)
Tube 13” Tape and Reel
Quantity Part Number
Suffix Quantity Part Number
Suffix
AP1122EL-13 E SOT223-3L NA NA 2500/Tape & Reel -13
AP1122EG-13 E SOT223-3L NA NA 2500/Tape & Reel -13
AP1122DL-13 D TO252-3L NA NA 2500/Tape & Reel -13
AP1122DG-13 D TO252-3L NA NA 2500/Tape & Reel -13
AP1122YL-13 Y SOT89-3L NA NA 2500/Tape & Reel -13
AP1122YG-13 Y SOT89-3L NA NA 2500/Tape & Reel -13
AP1122KL-13 K TO263-3L NA NA 800/Tape & Reel -13
AP1122TL-U T TO220-3L 50 -U NA NA
Notes: 7. TO263-3L and TO220-3L are available in “Lead Free” products only.
8. Pad layout as shown on Diodes Inc. suggested pad la yout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122
Document number: DS31012 Rev. 9 - 2 6 of 11
www.diodes.com May 2010
© 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 : 27~5 2 week ;
z repersents 52 an d 53 w eek
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 week
a~z : Lead Free
A~Z : Green
Part Number Package Identification Code
AP1122 SOT89-3L JB
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122
Document number: DS31012 Rev. 9 - 2 7 of 11
www.diodes.com May 2010
© 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
Document number: DS31012 Rev. 9 - 2 9 of 11
www.diodes.com May 2010
© Diodes Incorporated
Package Outline Dimensions (Continued)
(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 BSC. 9.00/ 10.40 Typ 9.70
SEATING
PLANE
SEE NOTE 2
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
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122
Document number: DS31012 Rev. 9 - 2 10 of 11
www.diodes.com May 2010
© Diodes Incorporated
Package Outline Dimensions (Continued)
(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 15.24
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 Pa ttern Recommen dation (Unit: m m )
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
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
AP1122
Document number: DS31012 Rev. 9 - 2 11 of 11
www.diodes.com May 2010
© Diodes Incorporated
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