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AP1120

DUAL 1A LOW DROPOUT POSITIVE REGULATOR

AP1120 Rev. 2 4 of 7 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

Absolute Maximum Ratings

Symbol Parameter Rating Unit

DC Supply Voltage -0.3 to 18 V V

Power Dissipation Internally Limited

Storage Temperature -65 to +150

Operating Junction Temperature Range 0 to +150

Electrical Characteristics (Under Operating Conditions)

Paramete

Conditions Min Typ. Max Unit

Output Voltage

AP1120(B) - V

OUT1

OUT

= 10mA, T

= 25

4.8V

≦V

≦12V

3.235 3.300 3.365 V

AP1120 - V

OUT2

OUT

= 10mA, T

= 25

≦V

≦12V

2.450 2.500 2.550 V

AP1120B - V

OUT2

OUT

= 10mA, T

= 25

≦V

≦12V

1.764 1.800 1.836 V

Line Regulation I

=10mA,V

OUT

+1.5V<V

<12V, T

=25

C 0.2 %

Load Regulation

AP1120 series

OUT1

= 5V, 0≦I

OUT

≦1A,

=25

C (Note 3, 4)

26 33 mV

AP1120 series

OUT2

=4V, 0mA<Io<1A,

=25

C (Note 3, 4)

20 25 mV

Dropout Voltage

-V

OUT

)

OUT

= 1A,ΔV

OUT

=0.1%V

OUT

1.3 1.4 V

Current Limit (V

-V

OUT

) = 5V 1. 1 A

Minimum Load Current

C≦Tj≦125

C (Note 5)

5 10 mA

Thermal Regulation T

=25

C, 30ms pulse 0.008 0.04 %/W

Ripple Rejection F=120Hz,C

OUT

=25uF Tantalum, I

OUT

=1A 60 70 dB

Temperature Stability I

=10mA 0.5 %

Thermal Resistance

Junction-to-Ambient (No

heat sink; No air flow)

SOP-8L: Control Circuitry/Power Transistor

(Note 6)

CH1 or CH2 only

CH1 & CH2 and PD1=PD2

C/W

Thermal Resistance

Junction-to-Case

SOP-8L: Control Circuitry/Power Transistor

(Note 6)

CH1 or CH2 only

CH1 & CH2 and PD1=PD2

C/W

Notes: 3. 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.

4. Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by

the input/output differentially and the output current. Guaranteed maximum power dissipation will not be available over the

full input/output range.

5. Quiescent current is defined as the minimum output current that requires maintaining regulation. At 12V input/output

differential the device is guaranteed to regulate if the output current is greater than 10mA.

6. Vout1 and Vout2 are connected to the PCB copper area 5.5mm*5.5mm separately. If you need large PD or lower Tc & Tj,

please connect to the large copper area >> 5.5mm*5.5mm (like 10mm*10mm).

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