AS2715T-2.5 [SIPEX]
Fixed Positive LDO Regulator, 2.5V, 0.69V Dropout, PSSO2, TO-263, 3 PIN;
| 型号： | AS2715T-2.5 |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | Fixed Positive LDO Regulator, 2.5V, 0.69V Dropout, PSSO2, TO-263, 3 PIN 输出元件 调节器 |
| 文件： | 总9页 (文件大小：166K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AS2715
1.5A High Current Low Dropout Voltage Regulator
Adjustable & Fixed Output,
Fast Response
(ADVANCED INFORMATION)
FEATURES
APPLICATIONS
• Adjustable Output Down To 1.2V
• 1% output accuracy @ 2.5V, 3.3V& 5.0V
• Output Current of 1.5A
• Powering VGA & Sound Card
• LCD Monitors
• USB Power Supply
• Low Dropout Voltage of 350mV @ 1.5A
• Extremely Tight Load And Line Regulation
• Extremely Fast Transient Response
• Reverse-battery and “Load Dump” Protection
• Power PC Supplies
• SMPS Post-Regulator
• High Efficiency “Green” Computer Systems
• High Efficiency Linear Power Supplies
• Standard 3-Terminal Low Cost TO-220, TO-263
• Portable Instrumentation
• Constant Current Regulators
• Adjustable Power Supplies
• Battery Charger
PRODUCT DESCRIPTION
The AS2715 is a 1.5A high accuracy, low dropout voltage regulator with only 350mV(Typ.)@ 1.5A). The AS2715 is designed for
low voltage application that requires lower dropout voltage and faster transient response. This device is an excellent choice for use in
powering low voltage microprocessor that require a lower dropout, faster transient response to regulate from +2.5V to 3.8V supplies
and as a post regulator for switching supplies applications.
The AS2715 offers full protection against over-current faults, reversed input polarity, reversed load insertion, and positive and
negative transient voltage. On-Chip trimming adjusts the reference voltage to 1%. Features such as Enable pin, Error Flag pin are
also included in the 5 pin packages.
The AS2715 is offered in a 3 & 5-pin TO-220 & TO-263 package compatible with other 3 terminal regulators. For a 3A low dropout
regulator refer to the AS2730 data sheet.
ORDERING INFORMATION
TO-220
3-PIN
AS2715U-X
TO-263
3-PIN
AS2715T-X
X = Output Voltage (2.5V, 3.3V, 5.0V or Blank for Adjustable.)
Consult with factory for other fixed output voltages.
PIN CONNECTIONS
TO-263-3 Package
TO-220-3 Package
AS2715
1
2
3
AS2715
VIN GND VOUT
Front View
VIN
GND VOUT
Front View
Rev. 10/11/00
AS2715
ABSOLUTE MAXIMUM RATINGS
Lead Temperature (soldering, 5 seconds)……………………260°C
Storage Temperature Range…………………………-65°C +150°C
Operating Junction Temperature Range……………..-40°C +125°C
Input Voltage)………………………………………..260°C
Input Supply Voltage (Note 1) (Survival)……-20V to +60V
ELECTRICAL CHARACTERISTICS at IOUT = 10mA, TA = 25°C, unless otherwise specified. The Boldface applies over the junction
temperature range.
AS2715
PARAMETER
2.5V Version
Output Voltage
CONDITIONS
Typ
Units
Min
Max
IOUT = 10mA
2.5
2.475
2.525
V
2.5
2.450
2.550
10mA ≤IOUT≤1.5A, 4.3V≤VIN ≤16V
3.3V Version2.
Output Voltage
IOUT = 10mA
3.3
3.267
3.330
V
V
3.3
3.234
3.366
10mA ≤IOUT≤1.5A, 4.3V≤VIN ≤16V
5.0V Version
Output Voltage
IOUT = 10mA
5.0
4.95
5.05
5.0
4.90
5.10
10mA ≤IOUT≤1.5A, 5.5V≤VIN ≤16V
All Voltage Options
Line Regulation
Load Regulation
∆V
∆T
0.1
0.2
50
0.5
1
100
%
%
ppm/°C
IO = 10mA, (VOUT + 1V) ≤ VIN≤ 16V
VIN = VOUT + 5V, 10mA ≤ IOUT≤ IFULLLOAD
Output Voltage
Temperature Coef.
90
mV
200
Dropout Voltage (Note 1)
IO = 100mA
IO = 750mA
IO = 1.5A
280
490
690
25
12
25
0.9
mA
mA
Ground Current (Note 3)
IO = 750mA, VIN = VOUT, +1V
IO = 1.5A
VIN = 0.1V less than specified VOUT IOUT = 10mA
IGNDDO Ground Pin Current
at Dropout
Current Limit
VOUT = 0V (Note 2)
2.2
1.7
A
400
CL = 10µF
µV RMS
Output Noise Voltage
(10Hz to 100kHz)
IL = 100mA
260
1.240
CL = 33µF
1.228
1.252
V
nA
Reference Voltage
1.215
1.265
40
50
80
Adjust Pin
120
Bias Current
(Note 4)
ppm/°C
Reference Voltage
Temperature
Coefficient
0.1
nA/°C
Adjust Pin Bias
Current Temperature
Coefficient
Rev. 10/11/00
AS2715
Device set for 3.3V (Note 5)
Device set for 3.3V (Note 5)
Device set for 3.3V (Note 5)
60
75
15
40
mV
mV
mV
Upper Threshold
Voltage
25
95
Lower Threshold
Voltage
140
Hysteresis
NOTES:
Note 1: Dropout voltage is defined as the input-to output differential when the output voltage drops to 95% of its nominal value.
Note 2: VIN = VOUT (NOMINAL) +1V. For example, use VIN= 4.3V for a 3.3V regulator. Employ pulse-testing procedures to minimize temperature rise.
Note 3: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current to the ground current.
Note 4: Thermal regulation is defined as the change in the output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation
effects.
Note 5: Comparator threshold is expressed in terms of a voltage differential at the Adjust terminal below the nominal reference voltage measured 6V input. To express
these thresholds in terms of output voltage change, multiply the error amplifier gain = VOUT/VREF = (R1 + R2)/R2. For example, at a programmable output voltage of
5V, the Error output is guaranteed to go low when the output drops by 95mVx 5V/ 1.240V = 38mV. Threshold remain constant as a percent of VOUT as VOUT is varied,
with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed.
Note 6: VEN ≤ 0.8V and VIN≤ 16V, VOUT = 0.
BLOCK DIAGRAM
IN
OUT
O.V
ILIMIT
FLAG
1.180V
1.240V
28V
R1*
Reference
+
-
+
-
ADJ
EN
Thermal
Shutdown
R2*
GND
Rev. 10/11/00
AS2715
APPLICATION HINTS
will guarantee stability over load. A tantalum capacitor is
recommended for a fast load transient response.
The AS2715 incorporates protection against over-current
faults, reversed load insertion, over temperature operation, and
positive and negative transient voltage. However, the use of
an output capacitor is required in order to insure the stability
and the performances.
If the power source has high AC impedance, a 0.1µF capacitor
between input & ground is recommended. This capacitor
should have good characteristics up to 250 kHz.
Thermal Consideration
Minimum Load Current
Although the AS2715 offers limiting circuitry for overload
conditions, it is necessary not to exceed the maximum junction
temperature, and therefore to be careful about thermal
resistance. The heat flow will follow the lowest resistance
path, which is the Junction-to-case thermal resistance. In
order to insure the best thermal flow of the component, a
proper mounting is required. Note that the case of the device
is electrically connected to the output. The
To ensure a proper behavior of the regulator at light load, a
minimum load of 5mA for AS2715 is required.
VOUT
VIN
case has to be electrically isolated, a thermally conductive
spacer can be used. However do not forget to consider its
contribution to thermal resistance.
AS2715
Assuming:
VIN = 10V, VOUT = 5V, IOUT = 1.5A, TA = 50°C/W,
θHeatsink Case= 6°C/W, θHeatsink Case = 0.5°C/W, θ JC = 3°C/W
Power dissipation under this condition
PD = (VIN – VOUT) * IOUT = 7.5W
Fig.1 Basic Fixed Output Regulator
Junction Temperature
TJ = TA + PD * (θCase – HS + θ HS θ JC
)
For the Control Section
TJ = 50 + 7.5*(0.5 + 6=3) = 121.25°C
121.25°C < TJ (max) for the Control & Power Sections.
In both case reliable operation is insured by adequate junction
temperature.
Capacitor Requirements
The output capacitor is needed for stability and to minimize
the output noise. The required value of the capacitor varies
with the load. However, a minimum value of 10µF Aluminum
Rev. 10/11/00
AS2715
Load Regulation
Line Regulation
3.310
3.305
3.300
3.295
3.290
3.285
3.280
3.320
3.315
3.310
3.305
3.300
3.295
3.290
3.285
3.280
3.3V Device
IL = 10mA
CL = 10uF
3.3V Device
Vin = 4.3V
CL = 10uF
0
0.25
0.5
0.75
IL (A)
1
1.25
1.5
4
6
8
10
Vin (V)
12
14
16
Ground Current vs. Load Current
Ground Current vs. Input Voltage
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
260
240
220
200
180
160
140
3.3V Device
Vin = 4.3V
CL = 10uF
3.3V Device
IL = 10mA
CL = 10uF
0
0.25
0.5
0.75
1
1.25
1.5
4
6
8
10
12
14
16
IL (A)
Vin (V)
Ground Current vs. Load Current
(In Dropout)
Dropout Voltage vs. Load Current
600
500
400
300
200
100
0
100
90
80
70
60
50
40
30
20
10
0
3.3V Device
3.3V Device
Vin = 3.2V
CL = 10uF
Vin = 3.2V
CL = 10uF
0
0.25
0.5
0.75
1
1.25
1.5
0
0.25
0.5
0.75
1
1.25
1.5
IL (A)
IL (A)
Rev. 10/11/00
AS2715
Ground Current vs. Temperature
(IL = 10mA)
Output Voltage vs. Temperature
280
270
260
250
240
230
220
210
200
190
180
3.320
3.310
3.300
3.290
3.280
3.270
3.260
3.250
3.240
3.230
3.220
3.3V Device
3.3V Device
Vin = 4.3V
IL = 10mA
CL = 10uF
Vin = 4.3V
IL = 10mA
CL = 10uF
-40
-20
0
20
40
60
80
100
120
-40
-20
0
20
40
60
80
100
120
Temperature (oC)
Temperature (oC)
Ground Current vs. Temperature
(In Dropout, IL = 750mA)
Ground Current vs. Temperature
(IL = 500mA)
35
34
33
32
31
30
29
28
27
26
7.00
6.80
6.60
6.40
6.20
6.00
5.80
5.60
5.40
5.20
5.00
3.3V Device
3.3V Device
Vin = 3.2V
IL = 750mA
CL = 10uF
Vin = 4.3V
IL = 500mA
CL = 10uF
25
-40
-20
0
20
40
60
80
100
120
-40
-20
0
20
40
60
80
100
120
Temperature (oC)
Temperature (oC)
Ground Current vs. Temperature
(In Dropout, IL = 1.5A)
Ground Current vs. Temperature
(IL = 1.5A)
100
95
90
85
80
75
70
52.0
50.0
48.0
46.0
44.0
42.0
40.0
38.0
36.0
3.3V Device
3.3V Device
Vin = 3.2V
IL = 1.5A
Vin = 4.3V
IL = 1.5A
CL = 10uF
CL = 10uF
-40
-20
0
20
40
60
80
100
120
-40
-20
0
20
40
60
80
100
120
Temperature (oC)
Temperature (oC)
Rev. 10/11/00
AS2715
Dropout Voltage vs. Temperature
(IL = 750mA)
400
380
360
340
320
300
280
260
240
220
200
3.3V Device
Vin = 3.2V
IL = 750mA
CL = 10uF
-40
-20
0
20
40
60
80
100
120
Temperature (oC)
Rev. 10/11/00
AS2715
PACKAGE DRAWING
TO-263-3L (T)
(4.470 ±
0.127)
0.051)
0.176±
0.050±
0.005
0.002 (1.270 ±
0.055 (1.397)
0.405 ±
0.005
±
(10.287 0.127)
0.356 ± 0.005
±
(9.042 0.127)
0.600 +- 0.025
±
(15.24
0.635)
±
0.010
0.100
±
(2.540 0.254)
0° 8°
0.103 BSC
(2.616)
0.050 (1.270)
+
0.032 +- 0.001
+ 0.003
0.015
-
(0.813 +- 0.025)
(0.381 0.074)
-
Rev. 10/11/00
AS2715
PACKAGE DRAWING
TO-220-3L (U)
0.180 ± 0.005
(4.572 ± 0.127)
0.151D ± 0.002
(3.835 D ± 0.051)
0.408 ± 0.013
(10.36 ± 0.33)
0.050 ± 0.002
(1.270 ± 0.051)
0.110 ± 0.010
(2.794 ± 0.254)
0.250 ± 0.010
(6.350 ± 0.254)
Tapered 1o
2 Sides
0.340 ± 0.010
(8.636 ± 0.254)
SEATING PLANE
1.020 ± 0.015
(25.910 ± 0.381)
0.150 MIN
(3.81 MIN)
7o Typ.
0.540 ± 0.015
(13.720 ± 0.381)
0.410
(10.41)
0.050 TYP
(1.27 TYP)
0.200 ± 0.010
(5.080 ± 0.254)
0.015 ± 0.010/-0.015
(2.667± 0.254/-0.381)
0.100 ± 0.010
(2.540 ± 0.254)
0.015 ± 0.010/-0.002
(0.381± 0.254/-0.051)
0.032 ± 0.005
(0.813 ± 0.127)
Rev. 10/11/00
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