APE1085 [A-POWER]
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator; 3A低压差正可调或固定模式稳压器
| 型号： | APE1085 |
| 厂家： | 
ADVANCED POWER ELECTRONICS CORP. |
| 描述： | 3A Low Dropout Positive Adjustable or Fixed-Mode Regulator |
| 文件： | 总10页 (文件大小：210K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
1. Features
General Description
• 1.4V maximum dropout at full load current
• Built-in thermal shutdown
• Output current limiting
APE1085 is a low dropout positive adjustable or
fixed-mode regulator with minimum of 3.0A output
current capability. The product is specifically
• Adjustable output voltage or fixed 1.5V, 1.8V, 2.5V, designed to provide well-regulated supply for low
3.3V, 5.0V
voltage IC applications such as high-speed bus
termination and low current 3.3V logic supply.
APE1085 is also well suited for other applications
such as VGA cards. APE1085 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.
• Fast transient response
• Good noise rejection
• Package : TO252, TO263, TO220
• RoHS Compliant
Ordering Information
APE 1085
X XX
Package
Vout
Low Dropout Regulator
H : TO252-3L Blank : Adj
S : TO263-3L 15 = 1.5V
P : TO220-3L 18 = 1.8V
25 = 2.5V
33 = 3.3V
50 = 5.0V
Block Diagram
Vin
3
2 Vout
+
+
+
1.25V
－
CURRENT
LIMIT
+
Thermal
Shutdown
1
Adj
This datasheet contains new product information. Advanced Power Electronics Corp. reserves the rights to modify the product specification without notice. No liability is assumed as
a result of the use of this product. No rights under any patent accompany the sale of the product.
200313072-1/10
Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Connection Diagram
TO263
TO252
FRONT VIEW
FRONT VIEW
Vin
3
Vin
3
Vout
2
Vout
2
1
Adj (GND)
1
Adj (GND)
Tab is Vout
Tab is Vout
TO220
FRONT VIEW
3
2
1
Vin
Vout
Adj (GND)
Tab is Vout
Pin Descriptions
Pin No.
Name I/O
Function
TO263/
252/220
PDIP-8
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)
Adj
I
1
2
1
(GND)
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.
2/3/5/6/
7/8
Vout
Vin
O
I
3
4
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Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A 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
Storage Temperature
-65 to +150
0 to +150
C
o
TOP
Operating Junction Temperature Range
C
Electrical Characteristics (Under Operating Conditions)
Sym.
Parameter
Conditions (Notes)
Min.
Typ.
Max.
Unit
VREF
Reference Voltage Io=10mA, Tj=25oC, (Vin-Vout)=1.5V
1.225
1.250
0.2
1.500
1.275
0.5
1.530
V
%
V
APE1085-XXX
APE1085-1.5
APE1085-1.8
APE1085-2.5
APE1085-3.3
APE1085-5.0
IO=10mA, VOUT+1.5V<VIN<12V, TJ =25oC
I
I
I
I
I
OUT = 10mA, TJ = 25oC, 3V≦VIN≦12V
OUT = 10mA, TJ = 25oC, 3.3V≦VIN≦12V
OUT = 10mA, TJ = 25oC, 4V≦VIN≦12V
OUT = 10mA, TJ = 25oC, 4.8V≦VIN≦12V
OUT = 10mA, TJ = 25oC, 6.5V≦VIN≦12V
1.470
1.764
2.450
3.235
4.900
1.800
2.500
3.300
5.000
1.836
2.550
3.365
5.100
V
V
V
V
Line
Regulation
VIN=3.3V, 0mA<Io<3A, TJ =25oC
(Note 1,2)
APE1085-Adj
APE1085-1.5
APE1085-1.8
APE1085-2.5
1
%
VIN=3V, 0mA<Io<3A, TJ =25oC
(Note 1,2)
12
15
20
15
18
25
mV
mV
mV
Load
Regulation
VIN=3.3V, 0mA<Io<3A
TJ =25oC (Note 1,2)
VIN=4V, 0mA<Io<3A
TJ =25oC (Note 1,2)
APE1085-3.3
APE1085-5.0
Dropout Voltage
Current Limit
Minimum Load
Current
VIN = 5V, 0mA<Io<3A , TJ=25oC (Note 1,2)
VIN = 8V, 0mA<Io<3A, TJ=25oC (Note 1,2)
26
40
1.3
33
50
1.4
mV
mV
V
∆Vo
Io=3.0A (∆Vout = 1% Vout)
Vin-Vout=5V
5.1
A
5
10
mA
%
Temperature
Stability
Io=10mA
0.5
Thermal Resistance
Junction-to-Ambient
(No heat sink ;No
air flow)
TO-252
TO-263
TO-220
98
83
83
θJA
OC/W
TO-252: Control Circuitry/Power Transistor
TO-263: Control Circuitry/Power Transistor
TO-220: Control Circuitry/Power Transistor
10
0.65/2.7
0.65/2.7
Thermal Resistance
Junction-to-Case
θJC
OC/W
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 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.
Advanced Power Electronics Corp.
www.a-power.com.tw
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Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Typical Circuit
(1) TO263/252/220
5.0V to 3.3V Fixed Mode Regulator
Adjustable Regulator
5V
5V
C1
100uF
C1
100uF
Vin
Vin
Vout
Adj
2.5V/3A
Vout
3.3V/3A
Ω
Ω
R1
R2
121
C2
100uF
C2
100uF
GND
Tab is Vout
121
Tab is Vout
R2
R1
VO = VREF∗ (1+
)
Note:
Advanced Power Electronics Corp.
www.a-power.com.tw
4/10
Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Functional Description
Introduction
The APE1085 is specifically designed to meet the fast
The APE1085 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
APE1085 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 3.0A load step.
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 APE1085 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
APE1085
Vout
Adj
Vref
R1
R2
Iadj=55uA
The APE1085 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
APE1085 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.
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 APE1085 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 APE1085 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.
Load Regulation
Since the APE1085 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
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.
Advanced Power Electronics Corp.
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Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Performance Characteristics
2. 0
1. 8
1. 6
1. 4
1. 2
1. 0
0. 8
0. 6
0. 4
0. 2
0
0.20
0
I load=1.5A
-0.20
-0.40
-0.80
- 1
Tj = 25 oC
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
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Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Marking Information
( Top View )
Part Number
10 85-VV
Logo
1085 for ADJ
1085-VV :
Y WW SSS
15 for 1.5V
18 for 1.8V
25 for 2.5V
33 for 3.3V
50 for 5V
Y: Year -
WW : Xth week - 01~52
SSS : Sequence - 001 ~
1
: 2001 ~
“ ＂
(TO252-3L)
( Top View )
1085 -VV
Part Number
Logo
1085 for ADJ
Y WW SSS
1085 VV
-
: 15 for1.5V
18 for1.8V
25 for2.5V
for3.3V
50 for5V
Y: Year -
1
: 2001 ~
“ ＂
33
WW : Xth week - 01~52
SSS : Sequence - 001 ~
(TO220-3L / TO263-3L)
Advanced Power Electronics Corp.
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Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Package Dimension
(1) TO263-3L
10.9
E
2.54
1.3
e
b
b2
Land Pattern Recommendation (Unit: mm)
L1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min.
4.06
0.51
1.14
Nom.
4.45
Max.
4.83
0.99
1.40
Min.
0.160
0.020
0.045
Nom.
0.175
Max.
0.190
0.039
0.055
A
b
0.75
0.030
b2
C
1.27
0.050
0.38 TYP.
1.27
0.015 TYP.
0.050
C2
D
1.14
8.65
9.65
1.40
9.65
0.045
0.055
9.15
0.341
0.380
0.360
0.393
0.380
0.405
E
9.97
10.29
e
2.54 BSC.
15.24
2.54
0.100 BSC.
0.600
L
14.61
2.28
-
15.88
2.80
2.92
1.78
0.575
0.625
L1
L2
L3
0.090
-
0.100
0.051
0.060
0.110
0.115
0.070
1.30
1.27
1.52
0.050
Advanced Power Electronics Corp.
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Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
(2) TO252-3L
5.6
E
b2
2.25
1.2
Land Pattern Recommendation (Unit: mm)
H
b
e
e1
L
SEATING PLANE
Notes:
1.
2.
JEDEC Outline: TO-252 AB
Mils suggested for positive contact at mounting.
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min.
2.18
0.89
Nom.
2.29
Max.
2.40
1.14
Min.
Nom.
0.090
-
Max.
A
A1
b
0.086
0.035
0.094
0.045
-
0.61 TYP.
5.35
0.024 TYP.
0.211
0.020
0.020
0.219
0.259
0.090 BSC.
0.180 BSC.
0.382
-
b2
C
5.20
0.45
0.45
5.40
6.35
5.50
0.58
0.58
6.20
6.80
0.205
0.018
0.018
0.213
0.250
0.217
0.023
0.023
0.244
0.268
0.52
C1
D
0.52
5.57
E
6.58
e
2.28 BSC.
4.57 BSC.
9.70
e1
H
9.00
0.51
0.64
0.88
10.40
-
0.354
0.020
0.025
0.035
0.409
-
L
-
L1
L2
0.83
1.02
1.27
0.033
-
0.040
0.050
-
Advanced Power Electronics Corp.
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9/10
Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
(3) TO220-3L
A
E
F
ΦP
H1
b1
C
b
J1
e
e1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min.
3.55
1.14
0.51
0.31
14.20
9.70
2.29
4.83
0.51
5.84
2.03
12.72
3.66
3.53
2.54
Nom.
4.20
1.46
0.83
0.72
15.35
10.20
2.54
5.08
0.95
6.35
2.48
13.72
5.00
3.81
2.98
Max.
4.85
1.78
1.14
1.14
16.50
10.70
2.79
5.33
1.40
6.86
2.92
14.72
6.35
4.09
3.43
Min.
Nom.
0.165
0.057
0.033
0.028
0.604
0.402
0.100
0.200
0.037
0.250
0.098
0.540
0.197
0.150
0.117
Max.
0.191
0.070
0.045
0.045
0.650
0.421
0.110
0.210
0.055
0.270
0.115
0.580
0.250
0.161
0.135
A
b1
b
0.140
0.045
0.020
0.012
0.559
0.382
0.090
0.190
0.020
0.230
0.080
0.501
0.144
0.139
0.100
C
D
E
e
e1
F
H1
J1
L
L1
øP
Q
Advanced Power Electronics Corp.
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