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
V
IN
DC Supply Voltage -0.3 to 12 V
T
ST
Storage Temperature -65 to +150
o
C
T
MJ
Maximum Junction Temperature 150
o
C
Recommended Operating Conditions
Symbol Parameter Min Max Unit
I
OUT
Output Current - 1.0 A
T
OP
Operating Junction Temperature Range 0 125
o
C
Electrical Characteristics (Under Operating Conditions)
Parameter Test Conditions Min Typ. Max Unit
Output Voltage
2.5V≦V
IN
≦12V, I
O
=10mA, T
A
=25
o
C
1.176 1.2 1.224 V
Line Regulation
2.5V≦V
IN
≦12V, I
O
=10mA, T
A
=25
o
C
0.2 %
Load Regulation V
IN
=2.5V~12V, 10mA<Io<1A, T
A
=25
o
C (Note 2, 3) 1 %
Dropout Voltage
(V
IN
-V
OUT
)
I
OUT
= 1A ,ΔV
OUT
= 1%V
OUT
1.3 V
Current Limit (V
IN
-V
OUT
) = 5V 1. 1 A
Minimum Load Current
(Note 4)
0
o
C≦T
J
≦125
o
C
5 10 mA
Thermal Regulation T
A
=25
o
C, 30ms pulse 0.008 0.04 %/W
Ripple Rejection F=120Hz,C
OUT
=25uF Tantalum, I
OUT
=1A, V
IN
=V
OUT
+3V 60 70 dB
Temperature Stability I
O
=10mA 0.5 %
θ
JA
Thermal Resistance
Junction-to-Ambient
SOT89-3L: Control Circuitry/Power Transistor (Note 5)
SOT223-3L: Control Circuitry/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
o
C/W
θ
JC
Thermal Resistance
Junction-to-Case
SOT89-3L: Control Circuitry/Power Transistor (Note 5)
SOT223-3L: Control Circuitry/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
o
C/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.
