LR8N3-GP005 [MICROCHIP]
1.2V-440V ADJUSTABLE POSITIVE REGULATOR, BCY3;型号: | LR8N3-GP005 |
厂家: | MICROCHIP |
描述: | 1.2V-440V ADJUSTABLE POSITIVE REGULATOR, BCY3 输出元件 调节器 |
文件: | 总10页 (文件大小:918K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Supertex inc.
LR8
High Input Voltage,
Adjustable 3-Terminal Linear Regulator
Features
General Description
► 13.2 - 450V input voltage range
► Adjustable 1.20 - 440V output regulation
► 5% output voltage tolerance
► Output current limiting
The Supertex LR8 is a high voltage, low output current, adjustable
linear regulator. It has a wide operating input voltage range of
13.2 - 450V. The output voltage can be adjusted from 1.20 - 440V
provided that the input voltage is at least 12V greater than the
output voltage. The output voltage can be adjusted by means of
two external resistors R1 and R2 as shown in the typical application
circuits. The LR8 regulates the voltage difference between VOUT
and ADJ pins to a nominal value of 1.20V. The 1.20V is amplified
by the external resistor ratio R1 and R2. An internal constant
bias current of typically 10µA is connected to the ADJ pin. This
increases VOUT by a constant voltage of 10µA times R2.
► 10µA typical ADJ current
► Internal junction temperature limiting
Applications
► Off-line SMPS startup circuits
► Adjustable high voltage constant current source
► Industrial controls
► Motor controls
The LR8 has current limiting and temperature limiting. The output
current limit is typically 20mA and the minimum temperature limit
is 125°C. An output short circuit current will therefore be limited
to 20mA. When the junction temperature reaches its temperature
limit, the output current and/or output voltage will decrease to
keep the junction temperature from exceeding its temperature
limit. For SMPS start-up circuit applications, the LR8 turns off
when an external voltage greater than the output voltage of the
LR8 is applied to VOUT of the LR8. To maintain stability, a bypass
capacitor of 1.0µF or larger and a minimum DC output current of
500µA are required.
► Battery chargers
► Power supplies
The device is available in TO-243AA (SOT-89), TO-252 (D-PAK),
and TO-92 packages.
Typical Application Circuit
*
VOUT
VIN
VOUT
VIN
R1
ADJ
C1
C2
LR8
RLOAD
R2
* Required for conditions where VIN is less than VOUT
.
Doc.# DSFP-LR8
B080113
Supertex inc.
www.supertex.com
LR8
Ordering Information
Pin Configuration
Part Number
Package Options
Packing
VOUT
LR8K4-G
TO-252 (D-PAK)
TO-92
2000/Reel
1000/Bag
2000/Reel
2000/Reel
2000/Reel
2000/Reel
2000/Reel
2000/Reel
LR8N3-G
LR8N3-G P002
LR8N3-G P003
LR8N3-G P005
LR8N3-G P013
LR8N3-G P014
LR8N8-G
TO-92
ADJ
OUT
TO-92
TO-252 (D-PAK)
TO-92
TO-92
TO-92
VOUT
TO-92
ADJ
VOUT
TO-243AA (SOT-89)
VIN
-G denotes a lead (Pb)-free / RoHS compliant package
TO-243AA (SOT-89)
Absolute Maximum Ratings
Parameter
Product Marking
Value
YY = Year Sealed
WW = Week Sealed
L = Lot Number
Si YYWW
LR8K4
LLLLLLL
VIN input voltage (voltages ref to ADJ)
Output voltage range
-0.5V to +480V
-0.5V to +470V
-40°C to +85°C
-40°C to +125°C
-65°C to +150°C
= “Green” Packaging
Operating ambient temperature range
Operating junction temperature range
Storage temperature range
Package may or may not include the following marks: Si or
TO-252 (D-PAK)
Y = Last Digit of Year Sealed
SiLR
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent
damage to the device. These are stress ratings only, and functional operation of the
device at these or any other conditions beyond those indicated in the operational sections
of the specifications is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
W = Code for Week Sealed
8
L = Lot Number
YWLL
= “Green” Packaging
Package may or may not include the following marks: Si or
TO-92
Typical Thermal Resistance
W = Code for Week Sealed
LR8W
Package
θja
= “Green” Packaging
Package may or may not include the following marks: Si or
TO-243AA (SOT-89)
TO-252 (D-PAK)
TO-92
81OC/W
132OC/W
133OC/W
TO-243AA (SOT-89)
Electrical Characteristics
(Test conditions unless otherwise specified: -40°C < TA < 85°C.)
Sym
Parameter
Min
Typ
Max Units Conditions
VIN - VOUT Input to output voltage difference
12
-
450
1.26
425
V
V
---
13.2V < VIN< 400V,
R1 = 2.4kΩ, R2 = 0
1.14
375
-
1.20
400
VOUT
Overall output voltage regulation
V
R1 = 2.4kΩ, R2 = 782kΩ
17V < VIN< 400V, VOUT = 5V,
IOUT = 0.5mA
ΔVOUT
ΔVOUT
ΔVOUT
Line regulation
0.003
0.01
%/V
VIN = 17V, VOUT = 5V,
0.5mA <IOUT< 10mA
Load regulation
-
1.4
-
3.0
+1
%
%
VIN = 17V, VOUT = 5V, IOUT = 10mA,
-40°C < TA < 85°C
Temperature regulation
-1
10
-
-
-
30
mA TJ < 85°C, VIN - VOUT = 12V
mA TJ > 125°C, VIN - VOUT = 450V
IOUT
Output current limit
0.5
Doc.# DSFP-LR8
B080113
Supertex inc.
www.supertex.com
2
LR8
Electrical Characteristics (cont.)
(Test conditions unless otherwise specified: -40°C < TA < 85°C.)
Sym
IOUT
IADJ
Parameter
Min
-
Typ
0.3
10
-
Max Units Conditions
Minimum output current
Adjust output current
Minimum output load capacitance
0.5
mA Includes R1 and load current
5.0
1.0
50
15
-
µA
µF
dB
°C
---
C2
---
DVOUT/DVIN Ripple rejection ratio
TLIMIT Junction temperature limit
60
-
-
120Hz, VOUT = 5V
---
125
-
Thermal Characteristics
Power Dissipation
θjc
°C/W
θja
°C/W
Package
@ TA = 25°C
0.74W
1.6W
TO-92
125
15
170
78†
50†
TO-243AA
TO-252
2.5W
6.25
Note:
†
Mounted on FR4 board, 25mm x 25mm x 1.57mm.
Functional Block Diagram
Pass
VOUT
ADJ
VIN
Element
Overtemp &
Overcurrent
1.2V
10µA
LR8
Doc.# DSFP-LR8
B080113
Supertex inc.
www.supertex.com
3
LR8
Typical Application Circuits
Figure 1: High Input Voltage, 5.0V Output Linear Regulator
*
V
OUT = 5.0V
VIN =
17 to 450V
VIN
VOUT
ADJ
R1
6.04kΩ
1%
LR8
C2
1.0µF
C1
RLOAD ≤16.5kΩ
R2
18.2kΩ
1%
R2
VOUT = 1.20V 1+
+ IADJ
* Required for conditions where VIN is less than VOUT
R1
Figure 2: SMPS Start-Up Circuit
+
VIN = (VOUT + 12V) to 450V
VAUXILIARY
VOUT
1
-
+
VIN
VOUT
V
OUT1
LR8 ADJ
VCC
-
FB
PWM IC
Figure 3: High Voltage Adjustable Constant Current Source
1.20V
R
IOUT
=
R
VIN
VOUT
+
LR8 ADJ
VIN =
Load
(VOUT + 12V) to 450V
1.0µF
-
Doc.# DSFP-LR8
B080113
Supertex inc.
www.supertex.com
4
LR8
Typical Performance Curves
Temperature Variation
1.30
1.25
1.20
1.15
1.10
VIN
VOUT = 1.2V
LR8
ADJ
12V
2.4k
Ω
1.0µF
1.05
1.00
-50
-25
0
25
50
75
100
125
T (junction) (OC)
Adjustment Current
12
11
10
9
VIN
VOUT = 1.2V
LR8
VIN = 400V
V
IN = 12V
ADJ
12V,
200V
400V
1.0ΩF
2.4kΩ
8
IADJ
VIN = 200V
7
6
-50
-25
0
25
50
75
100
125
T (junction) (OC)
Load Regulation
5.2
5.1
5.0
VIN
VOUT = 5.0V
IOUT
LR8
6.04kΩ
1%
ADJ
25V
1.0µF
RLOAD
18.2kΩ
1%
4.9
4.8
0
2
4
6
8
10
IOUT (mA)
Doc.# DSFP-LR8
B080113
Supertex inc.
www.supertex.com
5
LR8
Typical Performance Curves (cont.)
VOUT vs. VIN
6
5
4
3
2
VOUT = 5.0V
VIN
LR8
6.04kΩ
±±1
ADJ
±kΩ
RLOAD
0
±.0µF
0V to 50V
±8.2kΩ
±±1
±
0
0
±0
20
30
40
50
VIN (V)
Ripple Rejection
-65
-64
-63
-62
IOUT
VIN
VOUT = 5.0V
LR8
ADJ
6.04kΩ
±1
20VP-P
@ 60Hz
±
±.0µF
65V
±8.2kΩ
±1
±
-6±
-60
0
2
4
6
8
±0
IOUT (mA)
30
25
20
±5
±0
-40
-20
20
40
60
80
±00
Temperature (OC)
Doc.# DSFP-LR8
B080113
Supertex inc.
www.supertex.com
6
LR8
Typical Performance Curves (cont.)
Load Transient Response
VOUT = 5.0V
VIN
LR8
Closed
SW
Open
6.04kΩ
±±1
ADJ
sw
±.0µF
±0kΩ
25V
±8.2kΩ
±±1
532Ω
VOUT
Load Transient Response
Line Transient Response
400V
VIN
VOUT = 5.0V
VIN
400V
VIN
LR8
0V
6.04kΩ
±±1
ADJ
±.0µF
±0kΩ
±8.2kΩ
±±1
0V
VOUT
0V
Line Transient Response
400V
400V
VIN
VIN
0V
0V
5.0V
5.0V
VOUT
0V
VOUT
0V
Line Power Down Transient
Line Power Up Transient
Doc.# DSFP-LR8
B080113
Supertex inc.
www.supertex.com
7
LR8
3-Lead TO-252 D-PAK Package Outline (K4)
b3
A
E
c2
E1
L3
4
θ1
D1
H
D
L4
1
2
3
L5
Note 1
View B
b2
b
e
Front View
Rear View
Side View
Gauge
Plane
A1 Seating
Plane
L2
θ
L
L1
View B
Note:
1. Although 4 terminal locations are shown, only 3 are functional. Lead number 2 was removed.
θ
Symbol
A
A1
.086 .000* .025 .030 .195 .018 .235 .205 .250 .170
.240
b
b2
b3
c2
D
D1
E
E1
e
H
L
L1
L2
L3
L4
L5
θ1
0O
-
MIN
.370 .055
.060
.410 .070
.035 .025* .035† 0O
Dimen-
sion
(inches)
.090
BSC
.108 .020
REF BSC
NOM
-
-
-
-
-
-
-
-
-
-
-
-
-
-
MAX .094 .005 .035 .045 .215 .035 .245 .217* .265 .200*
.050 .040 .060 10O 15O
JEDEC Registration TO-252, Variation AA, Issue E, June 2004.
* This dimension is not specified in the JEDEC drawing.
†
This dimension differs from the JEDEC drawing.
Drawings not to scale.
Supertex Doc. #: DSPD-3TO252K4, Version F040910.
Doc.# DSFP-LR8
B080113
Supertex inc.
www.supertex.com
8
LR8
3-Lead TO-92 Package Outline (N3)
D
A
Seating
Plane
1
2
3
L
c
b
e1
e
Side View
Front View
E
E1
1
3
2
Bottom View
Symbol
A
.170
-
b
.014†
-
c
D
.175
-
E
.125
-
E1
.080
-
e
e1
.045
-
L
.500
-
MIN
NOM
MAX
.014†
-
.095
-
Dimensions
(inches)
.210
.022†
.022†
.205
.165
.105
.105
.055
.610*
JEDEC Registration TO-92.
* This dimension is not specified in the JEDEC drawing.
† This dimension differs from the JEDEC drawing.
Drawings not to scale.
Supertex Doc.#: DSPD-3TO92N3, Version E041009.
Doc.# DSFP-LR8
B080113
Supertex inc.
www.supertex.com
9
LR8
3-Lead TO-243AA (SOT-89) Package Outline (N8)
D
D1
C
H
E
E1
1
2
3
L
b
b1
A
e
e1
Top View
Side View
Symbol
A
1.40
-
b
0.44
-
b1
0.36
-
C
0.35
-
D
D1
1.62
-
E
E1
2.00†
-
e
e1
H
3.94
-
L
0.73†
-
MIN
NOM
MAX
4.40
-
2.29
-
Dimensions
(mm)
1.50
BSC
3.00
BSC
1.60
0.56
0.48
0.44
4.60
1.83
2.60
2.29
4.25
1.20
JEDEC Registration TO-243, Variation AA, Issue C, July 1986.
† This dimension differs from the JEDEC drawing
Drawings not to scale.
Supertex Doc. #: DSPD-3TO243AAN8, Version F111010.
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline
information go to http://www.supertex.com/packaging.html.)
Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives
an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability
to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and
specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//www.supertex.com)
©2013 Supertex inc.All rights reserved. Unauthorized use or reproduction is prohibited.
Supertex inc.
1235 Bordeaux Drive, Sunnyvale, CA 94089
Tel: 408-222-8888
www.supertex.com
Doc.# DSFP-LR8
B080113
10
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