Power APE1085S25 3a low dropout positive adjustable or fixed-mode regulator Datasheet

Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
„ General Description
1. Features
•
•
•
•
•
•
•
•
APE1085 is a low dropout positive adjustable or
fixed-mode regulator with minimum of 3.0A 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.
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.
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 : TO252, TO263, TO220
RoHS Compliant
„ Ordering Information
APE
Low Dropout Regulator
1085
X XX
Package
Vout
H : TO 252-3L 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
Vout
2
2
Adj (GND)
1
3
Tab is Vout
1
Vin
Vout
Adj (GND)
Tab is Vout
TO220
FRONT VIEW
3
Vin
2
Vout
1
Adj (GND)
Tab is Vout
„ Pin Descriptions
Pin No.
TO263/
PDIP-8
252/220
Name
I/O
Adj
(GND)
I
1
1
Vout
O
2
2/3/5/6/
7/8
Vin
I
3
4
Function
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.
Advanced Power Electronics Corp.
www.a-power.com.tw
2/10
Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
„ Absolute Maximum Ratings
Symbol
Parameter
Rating
Vin
PD
TST
DC Supply Voltage
Power Dissipation
Storage Temperature
TOP
Operating Junction Temperature Range
„ Electrical Characteristics
Sym.
Parameter
VREF
Reference Voltage
APE1085-XXX
APE1085-1.5
APE1085-1.8
Line
Regulation APE1085-2.5
APE1085-3.3
APE1085-5.0
APE1085-Adj
APE1085-1.5
Load
APE1085-1.8
Regulation
APE1085-2.5
∆Vo
θJA
θJC
APE1085-3.3
APE1085-5.0
Dropout Voltage
Current Limit
Minimum Load
Current
Temperature
Stability
Thermal Resistance
Junction-to-Ambient
(No heat sink ;No
air flow)
Unit
-0.3 to 12
V
Internally Limited
oC
-65 to +150
oC
0 to +150
(Under Operating Conditions)
Conditions (Notes)
o
Io=10mA, Tj=25 C, (Vin-Vout)=1.5V
IO=10mA, VOUT+1.5V<VIN<12V, TJ =25oC
IOUT = 10mA, TJ = 25oC, 3V≦VIN≦12V
IOUT = 10mA, TJ = 25oC, 3.3V≦VIN≦12V
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<3A, TJ =25oC
(Note 1,2)
VIN=3V, 0mA<Io<3A, TJ =25oC
(Note 1,2)
VIN=3.3V, 0mA<Io<3A
TJ =25oC (Note 1,2)
VIN=4V, 0mA<Io<3A
TJ =25oC (Note 1,2)
VIN = 5V, 0mA<Io<3A , TJ=25oC (Note 1,2)
VIN = 8V, 0mA<Io<3A, TJ=25oC (Note 1,2)
Io=3.0A (∆Vout = 1% Vout)
Vin-Vout=5V
Min.
Typ.
Max.
Unit
1.225
1.250
0.2
1.500
1.800
2.500
3.300
5.000
1.275
0.5
1.530
1.836
2.550
3.365
5.100
V
%
V
V
V
V
V
1
%
12
15
mV
15
18
mV
20
25
mV
26
40
1.3
33
50
1.4
mV
mV
V
A
5
10
mA
1.470
1.764
2.450
3.235
4.900
5.1
Io=10mA
0.5
TO-252
TO-263
TO-220
98
83
83
TO-252: Control Circuitry/Power Transistor
Thermal Resistance
TO-263: Control Circuitry/Power Transistor
Junction-to-Case
TO-220: Control Circuitry/Power Transistor
10
0.65/2.7
0.65/2.7
%
O
C/W
O
C/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
3/10
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
GND
Tab is Vout
3.3V/5A
3.3V/3A
C2
100uF
Vout
Adj
2.5V/5A
2.5V/3A
R1 121Ω
C2
100uF
R2 121Ω
Tab is Vout
Note: VO = VREF∗ (1 +
R2
R1
)
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
The APE1085 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.
Introduction
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.
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
APE1084
Adj
Vout
Vref
R1
Iadj=55uA
R2
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.
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
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.
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.
www.a-power.com.tw
5/10
Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
„ Performance Characteristics
0.20
2. 0
Output Voltage Deviation (%)
1. 8
1. 6
Dropout Voltage (V)
1. 4
1. 2
0
I load=1.5A
-0.20
Tj = 25 oC
1. 0
-0.40
0. 8
Tj = 125 oC
0. 6
-0.80
0. 4
0. 2
0
0
1
2
3
-1
5
4
Output Current (A)
-25
Dropout Voltage vs Output Current
0
25
50
Temperature ( oC)
75
100
125
Load Regulation vs Temperature
2
1
0.8
1
0. 5
0
-0.5
-1
-1.5
-2
-50
-25
0
25
50
Temperature ( oC)
75
100
125
150
Output Voltage Deviation (%)
Output Voltage Change (%)
1.5
0.6
0.4
0.2
0
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)
Line Transient Response
Load Current (A) Output Voltage Deviation (mV)
Output Voltage Deviation (mV) Input Voltage (V)
Percent Change in Output Voltage vs Temperature
6
8
10
Input Voltage (V)
12
Line Regulation
60
Cin=1uF
Cout=10uF Tantalum
Preload=100mA
40
20
0
-20
-40
6
4
2
0
0
10
20
30
40
50
TIME (us)
60
70
80
90
100
Load Transient Response
Advanced Power Electronics Corp.
www.a-power.com.tw
6/10
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 :
15 for 1.5V
18 for 1.8V
25 for 2.5V
33 for 3.3V
50 for 5V
Y WW SSS
Y: Year - “ 1 " : 2001 ~
WW : Xth week - 01 ~52
SSS : Sequence - 001 ~
(TO252-3L)
( Top View )
Part Number
1085 -VV
Logo
1085 for ADJ
1085 -VV : 15 for 1.5V
Y WW SSS
18
25
33
50
for 1.8V
for 2.5V
for 3.3V
for 5V
Y: Year - “ 1 " : 2001 ~
WW : Xth week - 01~52
SSS : Sequence - 001 ~
(TO220-3L / TO263-3L)
Advanced Power Electronics Corp.
www.a-power.com.tw
7/10
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
L3
3
L
15.7
D
9.1
L2
E
1.3
b
b2
2.54
Land Pattern Recommendation (Unit: mm)
C2
A
C
e
L1
Symbol
A
b
b2
C
C2
D
E
e
L
L1
L2
L3
Dimensions In Millimeters
Min.
Nom.
Max.
4.06
4.45
4.83
0.51
0.75
0.99
1.14
1.27
1.40
0.38 TYP.
1.14
1.27
1.40
8.65
9.15
9.65
9.65
9.97
10.29
2.54 BSC.
14.61
15.24
15.88
2.28
2.54
2.80
1.30
2.92
1.27
1.52
1.78
Dimensions In Inches
Min.
Nom.
Max.
0.160
0.175
0.190
0.020
0.030
0.039
0.045
0.050
0.055
0.015 TYP.
0.045
0.050
0.055
0.341
0.380
0.380
0.405
0.575
0.360
0.393
0.100 BSC.
0.600
0.090
0.050
0.100
0.051
0.060
0.110
0.115
0.070
0.625
Advanced Power Electronics Corp.
www.a-power.com.tw
8/10
Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
(2) TO252-3L
5.6
L2
E
7.2
D
11.0
5.6
b2
2.0
2.25
L1
1.2
Land Pattern Recommendation (Unit: mm)
e
e1
Notes:
1.
2.
Symbol
A
A1
b
b2
C
C1
D
E
e
e1
H
L
L1
L2
SEATING PLANE
A
L
SEE NOTE2
A1
C
H
C1
b
JEDEC Outline: TO-252 AB
Mils suggested for positive contact at mounting.
Dimensions In Millimeters
Min.
Nom.
Max.
2.18
2.29
2.40
0.89
1.14
0.61 TYP.
5.20
5.35
5.50
0.45
0.52
0.58
0.45
0.52
0.58
5.40
5.57
6.20
6.35
6.58
6.80
2.28 BSC.
4.57 BSC.
9.00
9.70
10.40
0.51
0.64
0.83
1.02
0.88
1.27
Dimensions In Inches
Min.
Nom.
Max.
0.086
0.090
0.094
0.035
0.045
0.024 TYP.
0.205
0.211
0.217
0.018
0.020
0.023
0.018
0.020
0.023
0.213
0.219
0.244
0.250
0.259
0.268
0.090 BSC.
0.180 BSC.
0.354
0.382
0.409
0.020
0.025
0.033
0.040
0.035
0.050
Advanced Power Electronics Corp.
www.a-power.com.tw
9/10
Advanced Power
Electronics Corp.
APE1085
Pb Free Plating Product
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
(3) TO220-3L
E
A
F
SEATING PLANE
Q
ΦP
L1
D
H1
L
b1
b
e
e1
Symbol
A
b1
b
C
D
E
e
e1
F
H1
J1
L
L1
øP
Q
Dimensions In Millimeters
Min.
Nom.
Max.
3.55
4.20
4.85
1.14
1.46
1.78
0.51
0.83
1.14
0.31
0.72
1.14
14.20
15.35
16.50
9.70
10.20
10.70
2.29
2.54
2.79
4.83
5.08
5.33
0.51
0.95
1.40
5.84
6.35
6.86
2.03
2.48
2.92
12.72
13.72
14.72
3.66
5.00
6.35
3.53
3.81
4.09
2.54
2.98
3.43
C
J1
Dimensions In Inches
Min.
Nom.
Max.
0.140
0.165
0.191
0.045
0.057
0.070
0.020
0.033
0.045
0.012
0.028
0.045
0.559
0.604
0.650
0.382
0.402
0.421
0.090
0.100
0.110
0.190
0.200
0.210
0.020
0.037
0.055
0.230
0.250
0.270
0.080
0.098
0.115
0.501
0.540
0.580
0.144
0.197
0.250
0.139
0.150
0.161
0.100
0.117
0.135
Advanced Power Electronics Corp.
www.a-power.com.tw
10/10
Similar pages