AP1121

Dual 1A Low Dropout Positive Regulator

Anachip Corp.

www.anachip.com.tw

Rev. 0.0 Mar. 4, 2004

3/6

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

3.235

3.300

3.365

V

2.450

2.500

2.550

V

Output Voltage

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

(Note4)

CH1 or CH2 only

CH1 & CH2 and PD1=PD2

50

45

JC

θ Thermal Resistance

Junction-to-Case

SOP8: Control Circuitry/Power Transistor

(Note 4)

CH1 or CH2 only

CH1 & CH2 and PD1=PD2

20

12

Note1: 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.

Note2: 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.

Note3: 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.

Note4: Vout1 and Vout2 are connected to the PCB cupper area 5.5mm*5.5mm separately. If you need large PD or lower Tc & Tj,

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