AP1120
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
Features
• 1.3V maximum dropout at full load current
• Fast transient response
• Output current limiting for each channel
• Built-in thermal shutdown each channel
• Good noise rejection
• Dual output ch1=3.3V, ch2=2.5V
(1.8V for B version)
• Lead Free Package: SOP-8L
• Lead Free Finish/ RoHS Compliant (Note 1)
Applications
• PC peripheral
• Communication
Ordering Information
General Description
AP1120 series are low dropout positive regulator to provide
1A output current capability. The product is specifically designed
to provide well-regulated supply for low voltage IC applications
such as high-speed bus termination and low current 3.3V/2.5V or
3.3V/1.8V logic supply. AP1120 series are guaranteed to have
<1.3V dropout at full load current making it ideal to provide well
regulated outputs dual channels with up to 18V input supply.
AP 1120 S X L - 13
Package
S : SOP-8L
Vout
Blank : CH1=3.3V
CH2=2.5V
Lead Free
L : Lead Free
Packing
13 : Tape & Reel
B : CH1=3.3V
CH2=1.8V
Device
AP1120SXL-13
Lead-free
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be on found our website at
http://www.diodes.com/datasheets/ap02001.pdf
Package
Code
S SOP-8L 2500/Tape & Reel -13
Packaging
(Note 2)
.
.
Quantity Part Number Suffix
AP1120 Rev. 2 1 of 7 FEBRUARY 2009
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13” Tape and Reel
Pin Assignments
( Top View )
AP1120
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
GND1
VIN 1
1
2
3.3V
8
3.3V
7
AP1120
2.5V (1.8V)
6
5
2.5V (1.8V)
GND 2
VIN 2
3
4
SOP-8L
Pin Descriptions
Pin Name Description
GND1/2 Ground
3.3V (Vout1)
2.5V/1.8V
(Vout2)
The output of the regulator. A minimum of 10uF c apacitor (0.15 Ω ≤ ESR ≤ 20Ω) must be
connected from this pin to ground to insure stability.
VIN1/2
AP1120 Rev. 2 2 of 7 FEBRUARY 2009
The input pin of regulator. Typically a large storage capacitor (0.15Ω ≤ ESR ≤ 20Ω) is
connected from this pin to ground.
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Block Diagram
AP1120
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
Vin 1
Vin 2
Typical Circuit
2
4
Thermal
Shutdown
Thermal
Shutdown
7,8
Vout 1
+
-
+
CURRENT
LIMIT
+
-
+
CURRENT
LIMIT
1.25V
+
-
1.25V
+
-
+
1
GND 1
5,6
Vout 2
+
3
GND 2
GND1
3.3V
3.3V/1A
5V
C1
Vin1
GND2
3.3V
2.5V
2.5V/1A
100uF
Vin2
2.5V
C2
100uF
C3
100uF
(3.3V/2.5V Dual output )
AP1120 Rev. 2 3 of 7 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
AP1120
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
Absolute Maximum Ratings
Symbol Parameter Rating Unit
VIN DC Supply Volt age -0.3 to 18 V V
PD Power Dissipation Internally Limited
TST Storage Temperature -65 to +150
TOP Operating Junction Temperature Range 0 to +150
o
C
o
C
Electrical Characteristics (Under Operating Conditions)
Parameter Conditions Min Typ. Max Unit
I
= 10mA, TA = 25oC,
AP1120(B) - V
Output Voltage
AP1120 - V
AP1120B - V
Line Regulation IO=10mA,V
OUT1
OUT2
OUT2
+1.5V<VIN<12V, TA =25oC 0.2 %
OUT
AP1120 series
V
Load Regulation
Dropout Voltage
IN-VOUT
)
(V
Current Limit (VIN-V
Minimum Load Current
OUT1
AP1120 series
V
OUT2
I
= 1A,ΔV
OUT
OUT
o
0
C≦Tj≦125oC (Note 5)
=0.1%V
OUT
) = 5V 1. 1 A
Thermal Regulation TA=25 oC, 30ms pulse 0.008 0.04 %/W
Ripple Rejection F=120Hz,C
=25uF Tantalum, I
OUT
Temperature Stability IO=10mA 0.5 %
θ
Thermal Resistance
JA
Junction-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
SOP-8L: Control Circuitry/Power Transistor
θ
Thermal Resistance
JC
Junction-to-Case
(Note 6)
CH1 or CH2 only
CH1 & CH2 and PD1=PD2
Notes: 3. See thermal regulation specifi cations for changes in output voltage due to he atin g effect s. Line and load regul ation 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/out put
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).
AP1120 Rev. 2 4 of 7 FEBRUARY 2009
OUT
4.8V
≦VIN≦12V
= 10mA, TA = 25oC,
I
OUT
≦VIN≦12V
4V
= 10mA, TA = 25oC,
I
OUT
4V
≦VIN≦12V
= 5V, 0≦I
V
IN
=25oC (Note 3, 4)
T
A
=4V, 0mA<Io<1A,
V
IN
T
=25oC (Note 3, 4)
A
OUT
OUT
≦1A,
3.235 3.300 3.365 V
2.450 2.500 2.550 V
1.764 1.800 1.836 V
26 33 mV
20 25 mV
1.3 1.4 V
5 10 mA
=1A 60 70 dB
OUT
50
45
20
12
O
C/W
O
C/W
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(
)
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
Typical Performance Characteristics
2. 0
1. 8
1. 6
1. 4
V
1. 2
1. 0
0. 8
0. 6
Dropout Voltage
0. 4
0. 2
0
0
Dropout Voltage vs Output Current
Tj = 25 oC
250
Output Current (mA)
500
Tj = 125 oC
750
1000
0.20
0
I load=800mA
-0.20
-0.40
-0.80
Output Voltage Deviation (%)
- 1
-25 0
25 50 75 100 125
Temperature (oC)
Load Regulation vs Temperature
AP1120
2
1.5
1
0. 5
0
-0.5
- 1
-1.5
Output Voltage Change (%)
- 2
-50 -25 0 25 50 75 100 125 150
Percent Change in Output Voltage vs Temperature
7.5
Cin=1uF
Cout=10uF Tantalum
6.5
5.5
40
20
0
-20
-40
0 20 40 60 80 100 120 140 160 180 200
Output Voltage Deviation (mV) Input Voltage (V)
Temperature (oC)
TIME (us)
Line Transient Response
1
0.8
0.6
0.4
0.2
Output Voltage Deviation (%)
0
24
30
C in = 1uF
20
C out = 10 uF Tant alum
Preload = 100mA
10
0
-10
-20
Output Voltage Deviation (mV)
2
1
0
-1
Load Current (A)
010
20 30 40 50 60 70 80 90 100
Load Transient Response
6 8 10 12
Input Voltage (V)
Line Regulation
TIME (us )
AP1120 Rev. 2 5 of 7 FEBRUARY 2009
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Marking Information
(1) SOP-8L
AP1120
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
( Top View )
8
5
Logo
Part Number
AP1120 X
YY
WW X
X
41
Package Information (All Dimensions in mm)
(1) Package type: SOP-8L
0.254
0.62/0.82
7°~9°
Gauge Plane
Seating Plane
Detail "A"
7°~9°
1.27typ
4.85/4.95
0.3/0.5
3.85/3.95
1.30/1.50
5.90/6.10
1.75max.
0.10/0.20
Detail "A"
0.35max.
45°
0.15/0.25
Blank : 3.3V/2.5V version
B : 3.3V/1.8V version
: Year : 08, 09,10~
YY
WW : Week : 01~52; 52
represents 52 and 53 week
: Internal Code
X
L : Lead Free
0°/8°
8x-0.60
5.4
6x-1.27
8x-1.55
Land Pattern Recommendation
(Unit: mm)
AP1120 Rev. 2 6 of 7 FEBRUARY 2009
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AP1120
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will
agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages.
LIFE SUPPORT
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the
President of Diodes Incorporated.
AP1120 Rev. 2 7 of 7 FEBRUARY 2009
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