AP1121

DUAL 1A LOW DROPOUT POSITIVE REGULATOR

AP1121 Rev. 4

4 of 7

FEBRUARY 2007

www.diodes.com

Absolute Maximum Ratings

Symbol

Parameter

Rating

Unit

DC Supply Voltage

-0.3 to 18 V

V

Storage Temperature

-65 to +150

Operating Junction Temperature Range

0 to +125

Maximum Junction Temperature

150

oC

Electrical Characteristics

( Under Operating Conditions )

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

4.8V

3.235

3.300

3.365

V

4V

2.450

2.500

2.550

V

Output Voltage

4V

1.764

1.800

1.836

V

Line Regulation

0.2

%

AP1121 series

26

33

mV

Load Regulation

AP1121 series

20

25

mV

Dropout Voltage

1.3

1.4

V

Current Limit

1. 1

A

Minimum Load Current

0

5

10

mA

Thermal Regulation

0.008

0.04

%/W

Ripple Rejection

60

70

dB

Temperature Stability

0.5

%

JA

θ Thermal Resistance

Junction-to-Ambient (No

heat sink; No air flow)

SOP8: Control Circuitry/Power Transistor

(Note 6)

CH1 or CH2 only

CH1 & CH2 and PD1 = PD2

177

158

JC

θ Thermal Resistance

Junction-to-Case

SOP8: Control Circuitry/Power Transistor

(Note 6)

CH1 or CH2 only

CH1 & CH2 and PD1 = PD2

29

19

Note:

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).