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
VIN DC Supply Vo ltage -0.3 to 18 V V
PD Power Dissipation Internally Limited
TST Storage Temperature -65 to +150 oC
TOP Operating Junction Temperature Range 0 to +150 oC
Electrical Characteristics (Under Operating Conditions)
Paramete
Conditions Min Typ. Max Unit
Output Voltage
AP1120(B) - VOUT1 IOUT = 10mA, TA = 25oC,
4.8V≦VIN≦12V 3.235 3.300 3.365 V
AP1120 - VOUT2 IOUT = 10mA, TA = 25oC,
4V≦VIN≦12V 2.450 2.500 2.550 V
AP1120B - VOUT2 IOUT = 10mA , TA = 25oC,
4V≦VIN≦12V 1.764 1.800 1.836 V
Line Regulation IO=10mA,VOUT+1.5V<VIN<12V, TA =25oC 0.2 %
Load Regulation
AP1120 series
VOUT1 VIN = 5V, 0≦IOUT≦1A,
TA =25oC (Note 3, 4) 26 33 mV
AP1120 series
VOUT2 VIN=4V, 0mA<Io<1A,
TA =25oC (Note 3, 4) 20 25 mV
Dropout Voltage
(VIN-VOUT) IOUT = 1A,ΔVOUT=0.1%VOUT 1.3 1.4 V
Current Limit (VIN-VOUT) = 5V 1. 1 A
Minimum Load Current 0oC≦Tj≦125oC (Note 5) 5 10 mA
Thermal Regulation TA=25 oC, 30ms pulse 0.008 0.04 %/W
Ripple Rejection F=120Hz,COUT=25uF Tantalum, IOUT=1A 60 70 dB
Temperature Stability IO=10mA 0.5 %
JA
θ
Thermal Resistance
Junc t i o n- t o - A m bi ent (No
heat sink; No air flow)
SOP-8L: Control Circuitry/Power Transistor
(Note 6)
CH1 or CH2 only
CH1 & CH2 and PD1=PD2
50
45
OC/W
JC
θ
Thermal Resistance
Junction-to-Case
SOP-8L: Control Circuitry/Power Transistor
(Note 6)
CH1 or CH2 only
CH1 & CH2 and PD1=PD2
20
12
OC/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 cur rent is defi ned as the minimum output current that requi res maintai n ing 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).