AP1084TXXG-U [DIODES]
5A LOW DROPOUT POSITIVE ADJUSTABLE; 5A低压差正可调型号: | AP1084TXXG-U |
厂家: | DIODES INCORPORATED |
描述: | 5A LOW DROPOUT POSITIVE ADJUSTABLE |
文件: | 总11页 (文件大小:155K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
AP1084
5A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
General Description
Features
AP1084 is a low dropout positive adjustable or fixed-mode
regulator with 5.0A 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 logic supply. AP1084 is also well suited for other
applications such as VGA cards. AP1084 is guaranteed to have
lower than 1.4V dropout at full load current making it ideal to
provide well-regulated outputs of 1.25 to 3.3V with 4.7 to
12V input supply.
•
•
•
•
1.4V Maximum Dropout at Full Load Current
Built-in Thermal Shutdown
Output Current Limiting
Adjustable Output Voltage or Fixed 1.5V, 1.8V, 2.5V,
3.3V, 5.0V
Fast Transient Response
Good Noise Rejection
Lead Free Packages: TO252-3L, TO263-3L and
TO220-3L
•
•
•
•
•
TO252-3L, TO263-3L and TO220-3L: Available in
“Green” Molding Compound (No Br, Sb)
Lead Free Finish/RoHS Compliant (Note 1)
Typical Application Circuit
5.0V to 3.3V Fixed Mode Regulator
Adjustable Regulator
5V
5V
C1
100uF
C1
100uF
V
V
in
in
V
out
2.5V/5A
V
out
3.3V/5A
Ω
Ω
R1
R2
121
121
C2
100uF
C2
100uF
Adj
GND
Tab is V
Tab is V
out
out
R2
R1
VO = VREF∗ (1+
)
Note:
AP1084 Rev. 9
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AP1084
5A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Ordering Information
AP1084 X XX X - X
Package
Vout
Lead Free
Packing
U : Tube
D : TO252-3L
K : TO263-3L
T : TO220-3L
L : Lead Free
G : Green
Blank = Adj
15 =1.5V
18 =1.8V
25 =2.5V
33 =3.3V
50 =5.0V
13 : Tape & Reel
Tube
Part Number
13” Tape and Reel
Package Packaging
Part Number
Device
Code
(Note 2)
Quantity
Quantity
Suffix
NA
NA
NA
NA
-U
Suffix
AP1084DXXL-13
AP1084DXXG-13
AP1084KXXL-13
AP1084KXXG-13
AP1084TXXL-U
AP1084TXXG-U
D
D
K
K
T
T
TO252-3L
TO252-3L
TO263-3L
TO263-3L
TO220-3L
TO220-3L
NA
NA
NA
NA
50
2500/Tape & Reel
2500/Tape & Reel
800/Tape & Reel
800/Tape & Reel
NA
-13
-13
-13
-13
NA
50
-U
NA
NA
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 found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
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AP1084
5A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Pin Assignment
(1) TO252-3L
(2) TO263-3L
( Top View )
( Top View )
VIN
3
3
2
VIN
VOUT
Adj (GND)
2
VOUT
1
Adj (GND)
1
Tab is VOUT
Tab is VOUT
(3) TO220-3L
( Top View)
3
VIN
2
1
VOUT
Adj (GND)
Tab is VOUT
Pin Description
Pin Name I/O Pin #
Description
Adjustable (Ground only for fixed mode)
Adj (GND)
VOUT
I
1
2
A resistor divider from this pin to the VOUT pin and ground sets the output voltage
(Ground only for Fixed-Mode).
The output of the regulator. A minimum of 10uF (0.15Ω ≤ ESR ≤ 20Ω) capacitor must
be connected from this pin to ground to insure stability.
O
The input pin of regulator. Typically a large storage capacitor is connected from this
pin to ground to insure that the input voltage does not sag below the minimum
dropout voltage during the load transient response. This pin must always be 1.4V
(1.3V) higher than VOUT in order for the device to regulate properly.
VIN
I
3
AP1084 Rev. 9
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AP1084
5A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Block Diagram
3
2
V
in
V
out
+
+
-
+
1.25V
CURRENT
LIMIT
+
Thermal
Shutdown
1
Adj
Absolute Maximum Ratings
Symbol
VIN
Parameter
Rating
Unit
DC Supply Voltage
-0.3 to 12
-65 to +150
150
V
o
TST
Storage Temperature
C
o
TMJ
Maximum Junction Temperature
C
Recommended Operating Conditions
Symbol
Parameter
Unit
Min
Max
125
o
TOP
Operating Junction Temperature Range
0
C
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AP1084
5A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Electrical Characteristics (Under Operating Conditions)
Symbol
Conditions
Min
Typ.
Max
Unit
Parameter
Reference
Voltage
VREF
Io = 10mA, TA = 25oC, (VIN-VOUT) = 1.5V
1.225
1.250
1.275
V
AP1084-XXX IO = 10mA, VOUT+1.5V<VIN<12V, TA = 25oC
0.2
1.530
1.836
2.550
3.365
5.100
1
%
V
V
V
V
V
%
IOUT = 10mA, TA = 25oC, 3V≦VIN≦12V
AP1084-1.5
1.470
1.764
2.450
3.235
4.900
1.500
1.800
2.500
3.300
5.000
IOUT = 10mA, TA = 25oC, 3.3V≦VIN≦12V
AP1084-1.8
Line
Regulation
IOUT = 10mA, TA = 25oC, 4V≦VIN≦12V
AP1084-2.5
IOUT = 10mA, TA = 25oC, 4.8V≦VIN≦12V
AP1084-3.3
IOUT = 10mA, TA = 25oC, 6.5V≦VIN≦12V
AP1084-5.0
AP1084-Adj VIN = 3.3V, 0mA<Io<5A, TA = 25oC
VIN = 3V, 0mA<Io<5A, TA = 25oC
(Note 3, 4)
AP1084-1.5
12
15
15
18
mV
mV
VIN = 3.3V, 0mA<Io<5A
AP1084-1.8
TA = 25oC (Note 3, 4)
Load
Regulation
VIN = 4V, 0mA < Io < 5A
AP1084-2.5
20
26
40
25
33
50
mV
mV
mV
TA = 25oC (Note 3, 4)
AP1084-3.3
AP1084-5.0
VIN = 5V, 0mA < Io < 5A, TA = 25oC (Note 3, 4)
VIN = 8V, 0mA < Io < 5A, TA = 25oC
(Note 3, 4)
Dropout
Voltage
Current Limit VIN-VOUT = 5V
Minimum Load
1.3
1.4
10
V
A
ΔVo
Io = 5.0A (ΔVOUT = 1% VOUT)
5.1
5
mA
Current
Temperature
Io = 10mA
Stability
0.5
%
Thermal
Shutdown
Temperature
TSD
150
OC
Thermal
TO220-3L
TO252-3L
78
73
Resistance
Junction-to-
Ambient
θJA
OC/W
OC/W
TO263-3L
60
(Note 5)
TO220-3L:Control Circuitry/Power Transistor
TO252-3L:Control Circuitry/Power Transistor
3.5
12
Thermal
Resistance
Junction-to-
Case (Note 5)
θJC
TO263-3L:Control Circuitry/Power Transistor
3.5
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 difference
between input and output and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range.
5. Test conditions for TO220-3L, TO252-3L and TO263-3L: Devices mounted on FR-4 substrate, single sided PC board, 2oz copper, with minimum
recommended pay layout, no air flow. The case point of θJC is located on the thermal tab.
AP1084 Rev. 9
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AP1084
5A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Functional Description
Introduction
The AP1084 adjustable Low Dropout (LDO) regulator is a 3 terminal device that can easily be programmed with the addition of two
external resistors to any voltages within the range of 1.25V to Vin-1.4V. The AP1084 only needs 1.4V differential between VIN and VOUT
to maintain output regulation. In addition, the output voltage tolerances are also extremely tight and they include the transient response
as part of the specification. For example, Intel VRE specification calls for a total of +/- 100mV including initial tolerance, load regulation
and 0 to 5.0A load step.
The AP1084 is specifically designed to meet the fast current transient needs as well as providing an accurate initial voltage,
reducing the overall system cost with the need for fewer output capacitors.
Output Voltage Setting
The AP1084 can be programmed to any voltages in the range of 1.25V to Vin-1.4V with the addition of R1 and R2 external resistors
according to the following formula:
V
= V (1+ R2/R1) +I *R2 , where V = 1.25 typically, I
=
adj
out
ref
adj
ref
55uA typically R1 & R2 as shown below:
V
V
out
in
AP1084
Adj
V
R1
R2
ref
I
= 55uA
adj
The AP1084 keeps a constant 1.25V between the output pin and the adjust pin. By placing a resistor R1 across these two pins a
constant current flows through R1, adding to the Iadj current and into the R2 resistor producing a voltage equal to the
(1.25/R1)*R2+Iadj*R2 which will be added to the 1.25V to set the output voltage. This is summarized in the above equation. Since the
minimum load current requirement of the AP1084 is 10mA, R1 is typically selected to be 121Ω resistor so that it automatically satisfies
the minimum current requirement. Notice that since Iadj is typically in the range of 55uA it only adds a small error to the output voltage
and should only be considered when a very precise output voltage setting is required. For example, in a typical 3.3V application where
R1=121Ω and R2=200Ω the error due to Iadj is only 0.3% of the nominal set point.
Load Regulation
Since the AP1084 is only a 3 terminal device, it is not possible to provide true remote sensing of the output voltage at the load. The
best load regulation is achieved when the bottom side of R2 is connected to the load and the top-side of R1 resistor is connected directly
to the case or the VOUT pin of the regulator and not to the load. It is important to note that for high current applications, this can re-present
a significant percentage of the overall load regulation and one must keep the path from the regulator to the load as short as possible to
minimize this effect.
Stability
The AP1084 requires the use of an output capacitor as part of the frequency compensation in order to make the regulator stable.
For most applications a minimum of 10uF aluminum electrolytic capacitor insures both stability and good transient response.
Thermal Design
The AP1084 incorporates an internal thermal shutdown that protects the device when the junction temperature exceeds the
maximum allowable junction temperature. Although this device can operate with junction temperatures in the range of 150oC, it is
recommended that the selected heat sink be chosen such that during maximum continuous load operation the junction temperature is
kept below that temperature.
Layout Consideration
The output capacitors must be located as close to the VOUT terminal of the device as possible. It is recommended to use a section
of a layer of the PC board as a plane to connect the VOUT pin to the output capacitors to prevent any high frequency oscillation that may
result due to excessive trace inductance.
AP1084 Rev. 9
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AP1084
5A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Typical Performance Characteristics
0.20
0
2. 0
1. 8
1. 6
1. 4
1. 2
1. 0
0. 8
0. 6
0. 4
0. 2
0
I load=1.5A
Tj = 25 oC
-0.20
-0.40
-0.80
- 1
Tj = 125 oC
25
Temperature (oC)
Load Regulation vs Temperature
50
75
100
125
-40
0
1
2
Output Current (A)
Dropout Voltage vs Output Current
3
4
5
0
2
1.5
1
1
0.8
0. 5
0
0.6
0.4
-0.5
- 1
0.2
0
-1.5
- 2
-40 -25
0
25
50
75
100 125 150
6
8
10
12
2
4
Temperature (oC)
Input Voltage (V)
Line Regulation
Percent Change in Output Voltage vs Temperature
7.5
60
40
Cin=1uF
Cout=10uF Tantalum
Preload=100mA
Cin=1uF
Cout=10uF Tantalum
6.5
20
0
5.5
40
-20
-40
6
20
0
4
-20
2
-40
0
0
20 40 60 80 100 120 140 160 180 200
TIME (us)
20 30 40 50 60 70 80 90 100
TIME (us)
Load Transient Response
0
10
Line Transient Response
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AP1084
5A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Marking Information
(1) TO252-3L
( Top view )
Logo
L : Lead Free
G : Green
Part Number
1084 for ADJ
84-VV : 15 for 1.5V
18 for 1.8V
84-VV
YY WW X X
YY : Year : 01~09
WW : Week : 01~52, 52 represents
52 and 53 week
X : Internal Code
25 for 2.5V
33 for 3.3V
50 for 5.0V
(2) TO263-3L
( Top view )
Logo
L : Lead Free
G : Green
YY : Year : 01~09
WW : Week : 01~52, 52 represents
52 and 53 week
X : Internal code
Part Number
VV: 15 for 1.5V
18 for 1.8V
1084-VV
YY WW X X
25 for 2.5V
33 for 3.3V
50 for 5.0V
Blank for ADJ
(3) TO220-3L
( Top view )
Logo
L : Lead Free
G : Green
YY : Year : 01~09
Part Number
VV: 15 for 1.5V
18 for 1.8V
1084-VV
YY WW X X
WW : Week : 01~52, 52 represents
52 and 53 week
25 for 2.5V
33 for 3.3V
X : Internal code
50 for 5.0V
Blank for ADJ
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AP1084
5A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Package Information (All Dimensions in mm)
(1) Package type: TO252-3L
5.6
6.354/6.80 Typ 6.58
5.20/5.50 Typ 5.35
2.25
1.2
Land Pattern Recommendation (Unit: mm)
2.18/2.40
2.28
BSC.
4.57 BSC.
0.61 Typ
0.64/1.02
Typ 0.83
0.89/
1.14
Typ 2.29
9.00/10.40 Typ 9.70
SEATING
PLANE
0.45/0.58
Typ 0.52
0.51
0.45/0.58
Typ 0.52
(2) Package type: TO263-3L
10.9
9.65/10.29 Typ 9.97
2.54
Land Pattern Recommendation (Unit: mm)
0.38 Typ
1.3
2.54
BSC.
0.51/0.99 Typ 0.75
1.14/1.40 Typ1.27
2.28/2.80 Typ 2.54
AP1084 Rev. 9
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AP1084
5A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Package Information (Continued)
(3) Package type: TO220-3L
3.55/4.85
Typ 4.20
∅
9.70/10.70
2.54/3.43
0.51/1.40
Typ 0.95
3.53/4.09
Typ 3.81
Typ 10.20
Typ 2.98
5.84/6.86
Typ 6.35
3.66/6.35
Typ 5.00
1.14/1.78
Typ 1.46
0.31/1.14
Typ 0.72
0.51/1.14
Typ 0.83
2.03/2.92
Typ 2.48
2.99/2.79
Typ 2.54
4.83/5.33
Typ 5.08
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AP1084
5A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDING TO THIS
DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other
changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any
liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated
convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products
described herein 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 Diodes Incorporated website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized
sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall
indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized
application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names
and markings noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems
without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided
in the labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected
to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or
systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements
concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,
notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,
Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes
Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2009, Diodes Incorporated
www.diodes.com
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相关型号:
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