AP1084PB15 [DIODES]
Fixed Positive LDO Regulator, 1.5V, 1.4V Dropout, BIPolar, PSSO2, LEAD FREE, POWERDI5-2;![AP1084PB15](http://pdffile.icpdf.com/pdf2/p00301/img/icpdf/AP1084SK33G_1819695_icpdf.jpg)
型号: | AP1084PB15 |
厂家: | ![]() |
描述: | Fixed Positive LDO Regulator, 1.5V, 1.4V Dropout, BIPolar, PSSO2, LEAD FREE, POWERDI5-2 |
文件: | 总9页 (文件大小:285K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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AP1084
1A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
General Description
Features
AP1084 is a low dropout positive adjustable or fixed-mode
regulator with minimum of 1.0A 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
Package: 3-Pin SOT223 and PowerDI™5 (Under
Development) packages
•
•
•
Ordering Information
AP1084 X
Package
X
X
X
Low Dropout Regulator
Vout
Packing
Lead Free
SK : SOT223-3L Blank : ADJ
PB : PowerDI™5 15 : 1.5V
18 : 1.8V
Blank : Lead-Free
G : Green
Blank : Tube or bulk
-7/-13 : Taping
25 : 2.5V
33 : 3.3V
50 : 5.0V
7” Tape and Reel
Quantity
13” Tape and Reel
Device
(Note 1)
Package Packaging
Part
Quantity
Part
Code
(Note 2)
Number
Number
Suffix
Suffix
AP1084SK
SK
SK
SK
SK
SK
SK
PB
PB
PB
PB
PB
PB
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
PowerDI™5
PowerDI™5
PowerDI™5
PowerDI™5
PowerDI™5
PowerDI™5
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
-7
10,000/Tape & Reel
10,000/Tape & Reel
10,000/Tape & Reel
10,000/Tape & Reel
10,000/Tape & Reel
10,000/Tape & Reel
5000/Tape & Reel
5000/Tape & Reel
5000/Tape & Reel
5000/Tape & Reel
5000/Tape & Reel
5000/Tape & Reel
-13
AP1084SK15
AP1084SK18
AP1084SK25
AP1084SK33
AP1084SK50
AP1084PB
AP1084PB15
AP1084PB18
AP1084PB25
AP1084PB33
AP1084PB50
-7
-7
-7
-7
-13
-13
-13
-13
-13
-13
-13
-13
-7
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
-13
-13
-13
DS30802 Rev. 1 - 2
1 of 9
AP1084
www.diodes.com
© Diodes Incorporated
AP1084
1A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Block Diagram
Vin
3
2 Vout
+
+
-
+
1.25V
CURRENT
LIMIT
+
Thermal
Shutdown
1
Adj
Connection Diagram
3 PIN SOT-223
( Top View )
3
3 PIN PowerDI™5
( Top View )
Vin
3 Vin
Vout
2
1
Vout 1
2 Adj (GND)
Adj (GND)
Tab is Vout
Pin Descriptions
Pin No.
Name
I/O
Function
PowerDI™
SOT-223
5
Adjustable (Ground only for fixed mode)
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.
The input pin of regulator. Typically a large storage capacitor (0.15Ω ≤ ESR ≤ 20Ω) 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.
Adj
(GND)
I
1
2
1
Vout
Vin
O
2/3/5/6/7/8
4
I
3
DS30802 Rev. 1 - 2
2 of 9
AP1084
www.diodes.com
© Diodes Incorporated
AP1084
1A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
Vin
PD
DC Supply Voltage
Power Dissipation
-0.3 to 12
V
Internally Limited
o
TST
TOP
Storage Temperature
-65 to +150
0 to +150
C
o
Operating Junction Temperature Range
C
Electrical Characteristics (Under Operating Conditions)
Sym.
Conditions (Notes)
Min.
Typ.
Max.
Unit
Parameter
VREF
Reference Voltage
AP1084-XXX
AP1084-1.5
AP1084-1.8
AP1084-2.5
AP1084-3.3
AP1084-5.0
Io=10mA, Tj=25oC, (Vin-Vout)=1.5V
IO=10mA, VOUT+1.5V<VIN<12V, TJ =25oC
IOUT = 10mA, TJ = 25oC, 3V≤VIN≤12V
1.225
1.250
1.275
0.2
V
%
V
V
V
V
V
1.470
1.764
2.450
3.235
4.900
1.500
1.800
2.500
3.300
5.000
1.530
1.836
2.550
3.365
5.100
I
OUT = 10mA, TJ = 25oC, 3.3V≤VIN≤12V
Line
Regulation
IOUT = 10mA, TJ = 25oC, 4V≤VIN≤12V
IOUT = 10mA, TJ = 25oC, 4.8V≤VIN≤12V
IOUT = 10mA, TJ = 25oC, 6.5V≤VIN≤12V
VIN=3.3V, 0mA<Io<1A, TJ =25oC
(Note 1,2)
AP1084-Adj
AP1084-1.5
AP1084-1.8
AP1084-2.5
1
%
VIN=3V, 0mA<Io<1A, TJ =25oC
(Note 1,2)
12
15
20
15
18
25
mV
mV
mV
Load
Regulation
VIN=3.3V, 0mA<Io<1A
TJ =25oC (Note 1,2)
VIN=4V, 0mA<Io<1A
TJ =25oC (Note 1,2)
AP1084-3.3
AP1084-5.0
Dropout Voltage
VIN = 5V, 0mA<Io<1A , TJ=25oC (Note 1,2)
26
40
1.3
33
50
1.4
mV
mV
V
V
IN = 8V, 0mA<Io<1A, TJ=25oC (Note 1,2)
∆Vo
Io=1.0A (∆Vout = 1% Vout)
Current Limit
Vin-Vout=5V
1.0
A
Minimum Load Current
Temperature Stability
Thermal Resistance
Junction-to-Ambient
(No heat sink ;No air flow)
5
0.5
10
mA
%
Io=10mA
SOT-223
Transistor
: Control Circuitry/Power
117
TBD
θJA
OC/W
PowerDI™5 : Control Circuitry/Power Transistor
Note 1: 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.
Note 2: Line and load regulation are guaranteed up to the maximum power dissipation of 5W. 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.
Note 3: Output is 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).
DS30802 Rev. 1 - 2
3 of 9
AP1084
www.diodes.com
© Diodes Incorporated
AP1084
1A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Typical Circuit
5V
5V
C1
100uF
C1
100uF
Vin
Vin
Vo
Vout
Adj
Vout
2.5V/1A
3.3V/1A
R1
121
C2
100uF
C2
100uF
Ω
GND
R2
Ω
121
Tab is Vout
Tab is Vout
( 5V/3.3V fixed output )
( 5V/2.5V ADJ output )
R2
Note:
Vo = VREF ∗(1+
)
R1
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 1.0A 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:
Vout = Vref (1+ R2/R1) +Iadj *R2 , where Vref = 1.25 typically, Iadj =
55uA typically R1&R2 as shown at below
Vin
Vout
AP1084
Adj
Vref
R1
R2
Iadj=55uA
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.
DS30802 Rev. 1 - 2
4 of 9
AP1084
www.diodes.com
© Diodes Incorporated
AP1084
1A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Functional Description (Continued)
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 the
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.
DS30802 Rev. 1 - 2
5 of 9
AP1084
www.diodes.com
© Diodes Incorporated
AP1084
1A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Performance Characteristics
2. 0
1. 8
1. 6
1. 4
0.20
0
I load=1.5A
-0.20
-0.40
-0.80
- 1
Tj = 25 oC
1. 2
1. 0
0. 8
0. 6
0. 4
0. 2
0
Tj = 125 oC
25
50
75
100
125
-25
0
1
2
3
4
5
0
Temperature (oC)
Output Current (A)
Dropout Voltage vs Output Current
Load Regulation vs Temperature
2
1.5
1
1
0.8
0. 5
0
0.6
0.4
-0.5
- 1
0.2
0
-1.5
- 2
-50 -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
DS30802 Rev. 1 - 2
6 of 9
www.diodes.com
AP1084
© Diodes Incorporated
AP1084
1A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Marking Information
(1) SOT-223
(Top view)
Datecode
Logo
W W
Y
Y
: Year
OutputType
1084: ADJ
84-15:1.5V
84-18:1.8V
84-19:1.9V
84-25:2.5V
84-33:3.3V
84-50:5.0V
WW: Nthweek
1 0 8 4 X
Blank :LeadFree
G :Green
(2) PowerDI™5
(Topview)
1084
Logo
Output Type
YWWX
Date code
: Year
1084 : ADJ
84-15: 1.5V
84-18: 1.8V
84-19: 1.9V
84-25: 2.5V
Y
WW: Nth w eek
Lead Free
Blank : Lead Free
G : Green
84-33: 3.3V
84-50: 5.0V
Date Code Key
Year
2006
2007
2008
2009
2010
Code
T
U
V
W
X
Month
Code
Jan
Feb March Apr
May
Jun
Jul
Aug Sep
Oct
Nov
Dec
1
2
3
4
5
6
7
8
9
O
N
D
DS30802 Rev. 1 - 2
7 of 9
AP1084
www.diodes.com
© Diodes Incorporated
AP1084
1A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Package Diagrams (All Dimensions in mm)
(1) SOT-223
6.30/6.70 Nom 6.50
2.90 3.15 Ref.
3.3
3.30/3.70
Nom 3.50
1.50/2.00
Nom 2.00
2.3
1.2
Land Pattern Recommendation (Unit: mm)
2.3 Basic
4.6 Basic
13°
0.91/1.10
0.60/0.70
Nom 0.80
0.28/0.32
Nom 1.00
13°
Seating Plane
Nom 0.30
(2) PowerDI™5
1.05/
1.15
3.90/
4.05
1.70/
1.88
0.33/0.43
0.50/
0.65
6.40/
6.60
5.30/5.45
0.33/0.43
0.50/
0.65
0.80/
0.99
0.80/
0.99
3.90/4.05
3.05 NOM
0.75/0.95
1.70/1.88
6.40/6.60
3.55
NOM
1.20/1.50
0.80/0.99
0.50/0.65
0.80/0.99
DS30802 Rev. 1 - 2
8 of 9
www.diodes.com
AP1084
© Diodes Incorporated
AP1084
1A LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Marking Code Table
Package
(Note 4)
Device
Marking Code
Date Code
AP1084SK
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
PowerDI™5
PowerDI™5
PowerDI™5
PowerDI™5
PowerDI™5
PowerDI™5
1084
84-15
84-18
84-25
84-33
84-50
1084
84-15
84-18
84-25
84-33
84-50
YWW
YWW
YWW
YWW
YWW
YWW
YWW
YWW
YWW
YWW
YWW
YWW
AP1084SK15
AP1084SK18
AP1084SK25
AP1084SK33
AP1084SK50
AP1084PB
AP1084PB15
AP1084PB18
AP1084PB25
AP1084PB33
AP1084PB50
Note:
4. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
DS30802 Rev. 1 - 2
9 of 9
AP1084
www.diodes.com
© Diodes Incorporated
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Fixed Positive LDO Regulator, 2.5V, 1.4V Dropout, BIPolar, PSSO2, LEAD FREE, POWERDI5-2
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AP1084PB25G
Fixed Positive LDO Regulator, 2.5V, 1.4V Dropout, BIPolar, PSSO2, GREEN, POWERDI5-2
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Fixed Positive LDO Regulator, 2.5V, 1.4V Dropout, BIPolar, PSSO2, GREEN, POWERDI5-2
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