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AP1122
1A LOW DROPOUT POSITIVE REGULATOR
Features
* * * * * * * * * 1.3V maximum dropout at full load current Fixed 1.2V2% output voltage Fast transient response Output current limiting Built-in thermal shutdown Good noise rejection Packages: SOT223-3L, TO252-3L, SOT89-3L SOT223-3L and TO252-3L: Available in "Green" Molding Compound (No Br, Sb) (Note 1) Lead Free Finish/RoHS Compliant (Note 2)
General 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 supply.
Applications
* * PC peripheral Communication
Ordering Information
AP1122XXX Package
E : SOT223-3L D : TO252-3L Y : SOT89-3L
Lead Free
Packing
-U : Tube L : Lead Free G : Green (Note 1) -13 : Taping
Note:
1. Green is only for SOT223-3L and TO252-3L. 2. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device (Note 3)
AP1122E AP1122D AP1122Y
Lead-free
Tube/Bulk Package Packaging Quantity Part Number Code (Note 3) Suffix
E D Y SOT223-3L TO252-3L SOT89-3L 75 80 NA -U -U NA
13" Tape and Reel Quantity Part Number Suffix
2500/Tape & Reel 2500/Tape & Reel 2500/Tape & Reel -13 -13 -13
Note:
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 Rev. 2
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AP1122
1A LOW DROPOUT POSITIVE REGULATOR
Pin Assignment
(1) SOT223-3L (2) TO252-3L
( Top View )
( Top View ) 3 2 1 Tab is Vout
(3) SOT89-3L
Vin Vout GND
3 2 1 Tab is Vout
Vin Vout
GND
3 2 1 Tab is Vout
Vin Vout GND
Typical Application Circuit
2.5V C1 100uF Vin Vout GND Tab is Vout C2 100uF 1.2V/1A
AP1122 Rev. 2
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AP1122
1A LOW DROPOUT POSITIVE REGULATOR
Block Diagram
Vin 3 2 Vout
+ +
CURRENT LIMIT 1.2V
+
+
Thermal Shutdown 1 GND
Pin Descriptions
NAME GND Vout Vin I/O I O I PIN # 1 2 3 FUNCTION Ground Pin 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. 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.
Absolute Maximum Ratings
Symbol Vin TST TOP TM Parameter DC Supply Voltage Storage Temperature Operating Junction Temperature Range Maximum Junction Temperature Rating -0.3 to 12 -65 to +150 0 to +125 150 Unit V o C o C oC
AP1122 Rev. 2
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AP1122
1A LOW DROPOUT POSITIVE REGULATOR
Electrical Characteristics
PARAMETER Output Voltage Line Regulation Load Regulation Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current (Note 6) Thermal Regulation Ripple Rejection Temperature Stability
(Under Operating Conditions)
CONDITIONS 2.5VVIN12V, TA=25oC IO=10mA, 2.5VSOT89-3L : Control Circuitry/Power Transistor (Note 7) SOT223-3L : Control Circuitry/Power Transistor (Note 8) TO252-3L : Control Circuitry/Power Transistor (Note 9) SOT89-3L : Control Circuitry/Power Transistor (Note 7) SOT223-3L : Control Circuitry/Power Transistor (Note 8) TO252-3L : Control Circuitry/Power Transistor (Note 9)
o
MIN 1.176
TYP 1.2
MAX 1.224 0.2 1
UNIT V % % V A
1.3 1. 1 5 0.008 60 0.5 182 107 73 42 12 16
1.4
10 0.04 70
mA %/W dB %
o
JA Thermal Resistance
Junction-to-Ambient
C/W C/W
JC Thermal Resistance
Junction-to-Case
Note:
o
4. 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. 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 differential the device is guaranteed to regulate if the output current is greater than 10mA. 7. Test condition for SOT89-3L: no air flow, no heat sink. 8. Test condition for SOT223-3L: TA = 27C, no air flow, device mounted on 2"X2" polyimide PCB, 2 oz copper, 5.6mmX5.6mm pad. 9. Test condition for TO252-3L: TA = 27C, no air flow, device mounted on 2"X2" polyimide PCB, 1 oz copper, 2cmX2cm pad.
AP1122 Rev. 2
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AP1122
1A LOW DROPOUT POSITIVE REGULATOR
Typical Performance Characteristics
2. 0 1. 8 0.20
Output Voltage Deviation (%)
1. 6
0 I load=800mA
Dropout Voltage (V)
1. 4 1. 2 1. 0 0. 8 0. 6 0. 4 0. 2 0 0 Tj = 125 oC Tj = 25 oC
-0.20
-0.40
-0.80
Dropout Voltage vs Output Current
2 1.5 1
Output Current (mA)
250
500
750
1000
-1
-25
0
Temperature (oC)
25
50
75
100
125
Load Regulation vs Temperature
Output Voltage Change (%)
1 0. 5 0 -0.5 -1 -1.5 -2 -50 -25 0 25 50 75 100 125 150
0.8
Output Voltage Deviation (%)
0.6
0.4
0.2
0
Percent Change in Output Voltage vs Temperature
Output Voltage Deviation (mV) Input Voltage (V) Load Current (A) Output Voltage Deviation (mV) 7.5 6.5 5.5 40 20 0 -20 -40 Cin=1uF Cout=10uF Tantalum 30 20 10 0 -10 -20 2 1 0 -1 0 10 20
Temperature (oC)
2
4
Line Regulation
C in = 1uF C out = 10 uF Tantalum Preload = 100mA
Input Voltage (V)
6
8
10
12
0
20
40
60
TIME (us)
80
100 120 140 160 180 200
30
TIME (us)
40
50
60
70
80
90
100
Line Transient Response
Load Transient Response
AP1122 Rev. 2
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AP1122
1A LOW DROPOUT POSITIVE REGULATOR
Marking Information
(1) SOT223-3L (2) TO252-3L
(Top view)
Internal Code Logo
Logo
(Top view)
XXX 1122 X
Month: A~L = 01~12 Year: "1" = 2001 "2" = 2002 Blank: Lead Free G: Green
1122X XXXX X
Blank: Lead Free G: Green Internal Code
Xth Week: 01~52
Year: "01" = 2001 "02" = 2002
~
(3) SOT89-3L
Date Code Month: A~L Year: 0~9
XX XX
1 2 3
Identification Code
Identification code JB
Output version AP1122
AP1122 Rev. 2
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AP1122
1A LOW DROPOUT POSITIVE REGULATOR
Package Information
(1) SOT223-3L
6.30/6.70 Nom 6.50 2.90 3.15 Ref. 1.6 3.3
6.70/7.30 Nom 7.00
3.30/3.70 Nom 3.50 1.6
1.50/2.00 Nom 2.00
13
2.3 Basic 4.6 Basic
1.2 0.02/0.08 Nom 0.05
2.3
Land Pattern Recommendation (Unit: mm)
1.50/ 1.80 Nom 1.65 0.91/1.10 Nom 1.00 Seating Plane Nom 0.30
0/10 Nom 5
13
0.60/0.70 Nom 0.80
AP1122 Rev. 2
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6.4 0.28/0.32
FEBRUARY 2007
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AP1122
1A LOW DROPOUT POSITIVE REGULATOR
Package Information
(2) TO252-3L
(Continued)
0.88/1.27
5.6
6.354/6.80 Typ 6.58 5.20/5.50 Typ 5.35
5.40/6.20 Typ 5.57
11.0
5.6
2.25 2.0
7.2 1.2 9.00/10.40 Typ 9.70 2.18/2.40 Typ 2.29 SEE NOTE2 SEATING PLANE 0.45/0.58 Typ 0.52
1.7 0.4 1.9 1.3 50 (2x) 2.7
0.61 Typ
2.28 BSC. 4.57 BSC.
0.64/1.02 Typ 0.83
Land Pattern Recommendation (Unit: mm)
0.89/ 1.14
0.45/0.58 Typ 0.52
0.51
Note:
10. JEDEC Outline: TO-252 AB Mils suggested for positive contact at mounting.
(3) SOT89-3L
1.40/1.75 Typ 1.60
2.35/2.60 Typ 2.48 1.45/1.55 Typ 1.50 0.80/ 1.20
3.94/4.25 1.40/1.60 Typ 1.50 0.35/0.43 Typ 0.39
2.90/3.10 Typ 3.00
1.5 0.9 Land Pattern Recommendation (Unit: mm)
80 (2x) 4.40/4.60 Typ 4.50
0.36/0.48 0.41/0.53 0.36/0.48 Typ 0.42 Typ 0.47 Typ 0.42
AP1122 Rev. 2
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(c) Diodes Incorporated
AP1122
1A LOW DROPOUT POSITIVE REGULATOR
IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. LIFE SUPPORT Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated.
AP1122 Rev. 2
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