Diodes AP1121AS Dual 1a low dropout positive regulator Datasheet

AP1121
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
General Description
Features
•
•
•
•
•
•
•
•
1.3V maximum dropout at full load current
Fast transient response
Output current limiting for each channel
Built-in thermal shutdown for each channel
Good noise rejection
Dual output ch1 = 3.3V, ch2 = 2.5V
(ch2 = 1.8V for version B)
SOP-8L: Available in “Green” Molding Compound (No
Br, Sb)
Lead Free Finish/ RoHS Compliant for Lead Free and
“Green” Products (Note 1)
AP1121 is a 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. AP1121 is a 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.
Applications
•
•
PC peripheral
Communication
Ordering Information
AP1121X X X X
Vout
A : CH1=3.3V
CH2=2.5V
B : CH1=3.3V
CH2=1.8V
Note:
Lead Free
S : SOP-8L
L : Lead Free
G : Green
Packing
-U
-13
: Tube
: Taping
1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
(Note 2)
AP1121AS
AP1121BS
Note:
Package
Tube/Bulk
Package
Packaging Quantity Part Number
Code
Suffix
S
S
SOP-8L
SOP-8L
100
100
-U
-U
13” Tape and Reel
Quantity
Part Number
Suffix
2500/Tape & Reel
2500/Tape & Reel
-13
-13
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP1121 Rev. 4
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AP1121
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
Pin Assignments
(Top View)
VOUT1 1
8
GND
VIN1 2
7
GND
VIN2 3
6
GND
VOUT2 4
5
GND
AP1121
Pin Descriptions
NAME
GND
3.3V(VOUT1)
2.5V/1.8V
(VOUT2)
VIN
AP1121 Rev. 4
Descriptions
Ground
The output of the regulator. A minimum of
10uF capacitor (0.15Ω ≤ ESR ≤ 20Ω) must
be connected from this pin to ground to
insure stability.
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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AP1121
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
Block Diagram
2
1
VIN1
VOUT1
-
+
+
1.25V
+
CURRENT
LIMIT
+
Thermal
Shutdown
5/6
-
GND
4
3
VOUT2
VIN2
-
+
+
1.25V
+
CURRENT
LIMIT
+
Thermal
Shutdown
7/8
-
GND
Typical Application Circuit
3.3V/1A
C1
100uF
V OUT1 GND
VIN1 GND
5V
C2
100uF 2.5V/1A
C3
100uF
VIN2
GND
V OUT2 GND
(3.3V/2.5V Dual output )
AP1121 Rev. 4
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AP1121
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
Absolute Maximum Ratings
Symbol
VIN
TST
Parameter
DC Supply Voltage
TOP
Operating Junction Temperature Range
TM
Maximum Junction Temperature
PARAMETER
Output Voltage
Line Regulation
Load Regulation
Dropout Voltage
(VIN-VOUT)
Current Limit
Minimum Load Current
Thermal Regulation
Ripple Rejection
Temperature Stability
V
-65 to +150
o
0 to +125
o
C
C
oC
150
( Under Operating Conditions )
CONDITIONS
IOUT = 10mA, TA = 25oC,
AP1121_ - VOUT1
4.8V≤VIN≤12V
IOUT = 10mA, TA = 25oC,
AP1121A - VOUT2
4V≤VIN≤12V
IOUT = 10mA, TA = 25oC,
AP1121B - VOUT2
4V≤VIN≤12V
IO = 10mA, VOUT +1.5V<VIN<12V, TA = 25oC
AP1121 series
VIN = 5V, 0≤IOUT ≤1A,
VOUT1
TA = 25oC (Note 3, 4)
AP1121 series
VIN = 4V, 0mA<Io<1A,
VOUT2
TA = 25oC (Note 4, 5)
MIN
TYP
MAX
UNIT
3.235
3.300
3.365
V
2.450
2.500
2.550
V
1.764
1.800
1.836
V
0.2
%
26
33
mV
20
25
mV
1.3
1.4
V
5
0.008
60
0.5
10
0.04
70
A
mA
%/W
dB
%
IOUT = 1A, ∆VOUT = 0.1%VOUT
(VIN-VOUT) = 5V
0oC≤Tj≤125oC (Note 5)
TA = 25 oC, 30ms pulse
F = 120Hz, COUT = 25uF Tantalum, IOUT = 1A
IO = 10mA
θ JA Thermal Resistance SOP8: Control Circuitry/Power Transistor
(Note 6)
Junction-to-Ambient (No CH1 or CH2 only
heat sink; No air flow)
CH1 & CH2 and PD1 = PD2
SOP8: Control Circuitry/Power Transistor
θ JC Thermal Resistance (Note 6)
CH1 or CH2 only
Junction-to-Case
CH1 & CH2 and PD1 = PD2
Note:
Unit
-0.3 to 18 V
Storage Temperature
Electrical Characteristics
Rating
1. 1
177
158
O
29
19
O
C/W
C/W
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).
AP1121 Rev. 4
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AP1121
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
Typical Performance Characteristics
0.20
2. 0
Output Voltage Deviation (%)
1. 8
1. 6
Dropout Voltage (V)
1. 4
1. 2
0
I load=800mA
-0.20
Tj = 25 oC
1. 0
-0.40
0. 8
Tj = 125 oC
0. 6
-0.80
0. 4
0. 2
0
0
250
750
500
-1
1000
Output Current (mA)
-25
Dropout Voltage vs Output Current
0
25
50
Temperature (oC)
75
100
125
Load Regulation vs Temperature
2
1
Output Voltage Deviation (%)
Output Voltage Change (%)
1.5
1
0. 5
0
-0.5
-1
-1.5
-2
-50
-25
0
25
50
Temperature (oC)
75
100
125
0.8
0.6
0.4
0.2
0
150
2
4
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
TIME (us)
30
10
12
C in = 1uF
C out = 10 uF Tantalum
Preload = 100mA
20
10
0
-10
-20
2
1
0
-1
Line Transient Response
AP1121 Rev. 4
8
Line Regulation
Load Current (A) Output Voltage Deviation (mV)
Output Voltage Deviation (mV) Input Voltage (V)
Percent Change in Output Voltage vs Temperature
6
Input Voltage (V)
0
10
20
30
40
50
TIME (us)
60
70
80
90
100
Load Transient Response
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AP1121
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
Marking Information
SOP-8L
(Top View)
8
5
A : 3.3V/2.5V version
B : 3.3V/1.8V version
Logo
Part Number
AP1121 X
L : Lead Free
G : Green
YY WW X X
4
~
1
ID code: internal
Xth week: 01~52
Year: "01" =2001
"02" =2002
SOP-8L
Device
Package
Identification Code
AP1121AS
AP1121BS
SOP-8L
SOP-8L
AP1121
AP1121
Package Information
0.254
0.08/0.25
5.79/6.20
3.70/4.10
Package Type: SOP-8L
Gauge Plane
Seating Plane
0.38/1.27
Detail "A"
7°~9°
0.20typ
1.75max.
1.30/1.50
0.35max. 45°
0.3/0.5
1.27typ
7°~9°
Detail "A"
3.70/4.10
4.80/5.30
AP1121 Rev. 4
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© Diodes Incorporated
AP1121
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.
AP1121 Rev. 4
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© Diodes Incorporated
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