AP1122 datasheet(4/9 Pages) DIODES

4 / 9 page

AP1122

1A LOW DROPOUT POSITIVE REGULATOR

AP1122 Rev. 2

4 of 9

FEBRUARY 2007

www.diodes.com

Electrical Characteristics

(Under Operating Conditions)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

Output Voltage

2.5V≦VIN≦12V, TA=25

1.176

1.2

1.224

Line Regulation

IO=10mA, 2.5V<VIN<12V, TA=25

0.2

Load Regulation

VIN=2.5V~12V,Vadj=0,0mA<Io<1A, TA=25

(Note 4,5)

Dropout Voltage

(VIN-VOUT)

IOUT = 1A ,∆VOUT=0.1%VOUT

1.3

1.4

Current Limit

(VIN-VOUT) = 5V

1. 1

Minimum Load Current

(Note 6)

oC≦Tj≦125oC

Thermal Regulation

TA=25

oC, 30ms pulse

0.008

0.04

%/W

Ripple Rejection

F=120Hz,COUT=25uF Tantalum, IOUT=1A,

VIN=VOUT+3V

Temperature Stability

IO=10mA

0.5

θ Thermal Resistance

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 9)

182

107

oC/W

θ Thermal Resistance

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 9)

oC/W

Note:

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 = 27°C, no air flow, device mounted on 2”X2” polyimide PCB, 2 oz copper, 5.6mmX5.6mm pad.

9. Test condition for TO252-3L: TA = 27°C, no air flow, device mounted on 2”X2” polyimide PCB, 1 oz copper, 2cmX2cm pad.

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