LR12N3-GP005 [SUPERTEX]
High Input Voltage, Adjustable 3-Terminal Linear Regulator;
| 型号： | LR12N3-GP005 |
| 厂家： | 
Supertex, Inc |
| 描述： | High Input Voltage, Adjustable 3-Terminal Linear Regulator 输出元件 调节器 |
| 文件： | 总10页 (文件大小：1271K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Supertex inc.
LR12
High Input Voltage, Adjustable
3-Terminal Linear Regulator
Features
General Description
► 13.2 to 100V input voltage range
The Supertex LR12 is a high voltage, low output current,
adjustable linear regulator. It has a wide operating input voltage
range of 13.2 - 100V. The output voltage can be adjusted from
1.20- 88V,providedthattheinputvoltageisatleast12Vgreater
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 LR12 regulates the voltage
difference between VOUTand 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.
► Stable with 100nF output capacitor
► Adjustable 1.20 to 88V output regulation
► 5% reference voltage tolerance
► Output current limiting, 50mA min.
► 10µA typical ADJ current
► Over temperature protection
► Available in 3 different packages
Applications
► DC/DC SMPS startup circuits
► Adjustable high voltage constant current sources
► Industrial controls
The LR12 has current limiting and temperature limiting. The
output current limit is 100mA maximum and the minimum
temperature limit is 125°C. An output short circuit current will
therefore be limited to 100mA maximum. 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-upcircuitapplications,theLR12turnsoffwhenanexternal
voltage greater than the output voltage of the LR12 is applied
to VOUT of the LR12. To maintain stability, a bypass capacitor
of 100nF or larger and a minimum DC output current of 500µA
are required.
► Motor controls
► Battery powered systems
► Power supplies
► Telecom applications
► LED drivers
► Automotive applications
LR12 Typical Application
*
VOUT
1.2 to 88V
VIN
VIN
VOUT
13.2 to 100V
R1
ADJ
LR12
RLOAD
C2
C1
R2
* Required for conditions where VIN is less than VOUT
.
Doc.# DSFP-LR12
C080113
Supertex inc.
www.supertex.com
LR12
Pin Configuration
Ordering Information
VOUT
Part Number
Package Options
Packing
LR12K4-G
TO-252 (D-PAK)
8-Lead SOIC
TO-92
2000/Reel
2500/Reel
1000/Bag
2000/Reel
2000/Reel
2000/Reel
2000/Reel
2000/Reel
LR12LG-G
LR12N3-G
ADJ
LR12N3-G P002
LR12N3-G P003
LR12N3-G P005
LR12N3-G P013
LR12N3-G P014
TO-92
TO-92
TO-252 (D-PAK)
TO-92
ADJ
NC
NC
TO-92
VIN
TO-92
VOUT
-G denotes a lead (Pb)-free / RoHS compliant package
VOUT
VOUT
VOUT
OUT
Absolute Maximum Ratings
Parameter
8-Lead SOIC
TO-92
Value
VIN-ADJ
-0.5V to +120V
-10V to +10V
Product Marking
VOUT-ADJ
YY = Year Sealed
WW = Week Sealed
L = Lot Number
Si YYWW
LR12K4
LLLLLLL
VIN - VOUT
-0.5V to +120V
-40°C to +85°C
-40°C to +125°C
-65°C to +150°C
Operating ambient temperature
Operating junction temperature
Storage temperature
= “Green” Packaging
Package may or may not include the following marks: Si or
TO-252 (D-PAK)
Power Dissipation @ TA = 25OC
TO-252 (D-PAK)
8-Lead SOIC
YY = Year Sealed
YYWW
2.0W
1.8W
0.6W
WW = Week Sealed
LR12
L = Lot Number
TO-92
LLLL
= “Green” Packaging
Package may or may not include the following marks: Si or
Typical Thermal Resistance
8-Lead SOIC
Package
θja (OC/W)
81OC/W
101OC/W
132OC/W
Y = Last Digit of Year Sealed
SiLR
W = Code for Week Sealed
1 2
TO-252
L = Lot Number
YWLL
8-Lead SOIC
TO-92
= “Green” Packaging
Package may or may not include the following marks: Si or
TO-92
Electrical Characteristics (Test conditions unless otherwise specified: -40OC < TA < +85OC)
Sym
Parameter
Min
Typ
Max
98.8
1.26
Units Conditions
VIN -VOUT Input to output voltage difference
12
-
V
V
---
VOUT
Overall output voltage regulation 1.14 1.20
13.2V < VIN <100V, R1 = 2.4KΩ, R2 = 0
Line regulation
Load regulation
-
-
0.003 0.03
%/V 15V < VIN <100V, VOUT = 5.0V, IOUT = 0.5A
VIN = 15V, VOUT = 5.0V,
0.5mA< IOUT<50mA
1.4
-
3.0
%
ΔVOUT
VIN = 15V, VOUT = 5.0V, IOUT = 10mA,
Temperature regulation
-1.0
+1.0
%
-40OC < TA < 85OC
Doc.# DSFP-LR12
C080113
Supertex inc.
www.supertex.com
2
LR12
Electrical Characteristics(cont.)
Sym
Parameter
Min
50
-
Typ
Max Units Conditions
-
-
100
-0.5
-
TJ < 85OC, VIN - VOUT < 12V
Output current limit
ma
IOUT
TJ < 125OC, VIN - VOUT < 100V
Includes R1 and load current
---
Minimum output current
Adjust output current
0.5
5.0
-
mA
µA
IADJ
C2
10
15
Minimum output load
capacitance
100
-
-
nF
---
DVOUT/DVIN Ripple rejection ratio
TLIMIT Junction temperature limit
50
60
-
-
-
dB
OC
120Hz, VOUT = 5.0V
---
125
Functional Block Diagram
LR12
Pass
Element
VIN
VOUT
6.5V
1.0kΩ
Overtemp &
Overcurrent
1.2V
10μA
ADJ
Current Limit
100
90
80
70
60
50
-40
-20
0
20
40
60
80
100
Temperature (OC)
Doc.# DSFP-LR12
C080113
Supertex inc.
www.supertex.com
3
LR12
Typical Application Circuits
Figure 1: High Input Voltage, 5.0V Output Linear Regulator
*
Required for conditions where VIN is less than VOUT.
*
VOUT = 5.0V
VIN =
VIN
VOUT
17 - 100V
R1
C2
100nF
ADJ
6.04kΩ
1ꢀ
RLOAD ≤ 16.5kΩ
LR12
C1
R2
R2
R1
18.2kΩ
V
OUT = 1.20V 1+
+ IADJ R2
1ꢀ
Figure 2: SMPS Start-Up Circuit
VIN = 15 to 100V
+
VAUX
VOUT1
-
VIN
+
VOUT
ADJ
VOUT
2
LR12
VCC
-
FB
PWM IC
Figure 3: High Voltage Adjustable Constant Current Source
1.20V
R
IOUT
=
+
VIN
VOUT
ADJ
R
VIN =
15 - 100V
LR12
100nF
-
Doc.# DSFP-LR12
C080113
Supertex inc.
www.supertex.com
4
LR12
Typical Performance Curves
Temperature Variation
1.30
1.25
1.20
1.15
1.10
1.05
1.00
VOUT = 1.2V
VIN
VOUT
ADJ
LR12
100nF
2.4kΩ
13.2V
-50
-25
0
25
50
75
100
125
T(junction) (oC)
Load Regulation
5.30
5.25
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
IOUT
VOUT = 5.0V
VIN
VOUT
ADJ
6.04kΩ
±±1
LR12
±00nF
25V
RLOAD
±8.2kΩ
±±1
0
5
10
15
20
25
30
35
40
45
50
IOUT (mA)
Doc.# DSFP-LR12
C080113
Supertex inc.
www.supertex.com
5
LR12
Typical Performance Curves (cont.)
VOUT vs. VIN
6.0
5.0
4.0
3.0
2.0
1.0
0
VOUT = 5.0V
VIN
VOUT
ADJ
6.04kΩ
±±1
LR12
±00nF
±.0kΩ
0V to 50V
±8.2kΩ±±1
0
20
40
60
80
100
VIN (V)
Ripple Rejection
-65
-64
-63
-62
-61
-60
IOUT
VOUT = 5.0V
VIN
VOUT
ADJ
6.04kΩ
±±1
LR12
20VP-P
@ ±20Hz
±00nF
RLOAD
65V
±8.2kΩ ±±1
0
10
20
30
40
50
IOUT (mA)
Doc.# DSFP-LR12
C080113
Supertex inc.
www.supertex.com
6
LR12
Typical Performance Curves (cont)
Load Transient Response
Line Transient Response
100V
VOUT = 5.0V
VIN
VOUT
VIN
VOUT
VIN
0V
ADJ
LR12
6.04kΩ
1ꢀ
ADJ
6.04kΩ
1ꢀ
SW
LR12
100nF
100nF
10kΩ
10kΩ
25V
VIN
0V
18.2kΩ
1ꢀ
509Ω
18.2kΩ
1ꢀ
Load Transient Response, Load = 509Ω
Line Turn On/Off Response
Line Power Up Transient
Line Power Down Transient
Doc.# DSFP-LR12
C080113
Supertex inc.
www.supertex.com
7
LR12
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
0O
-
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* .045
Dimen-
sion
(inches)
.090
BSC
.108 .020
REF BSC
NOM
-
-
-
-
-
-
-
-
-
-
-
-
-
MAX .094 .005 .035 .045 .215 .035 .245 .217* .265 .182*
.050 .040 .060 10O 15O
JEDEC Registration TO-252, Variation AA, Issue E, June 2004.
* This dimension is not specified in the JEDEC drawing.
Drawings not to scale.
Supertex Doc. #: DSPD-3TO252K4, Version E091009.
Doc.# DSFP-LR12
C080113
Supertex inc.
www.supertex.com
8
LR12
8-Lead SOIC (Narrow Body) Package Outline (LG)
4.90x3.90mm body, 1.75mm height (max), 1.27mm pitch
θ1
D
8
Note 1
(Index Area
D/2 x E1/2)
E1
E
Gauge
Plane
L2
Seating
Plane
L
θ
1
L1
Top View
View B
View B
Note 1
h
A
h
A2
A
Seating
Plane
A1
e
b
A
Side View
View A-A
Note:
1. This chamfer feature is optional. A Pin 1 identifier must be located in the index area indicated. The Pin 1 identifier can be: a molded mark/identifier;
an embedded metal marker; or a printed indicator.
Symbol
A
A1
A2
b
D
E
E1
e
h
L
L1
L2
θ
0O
-
θ1
5O
-
MIN 1.35* 0.10 1.25 0.31 4.80* 5.80* 3.80*
NOM 4.90 6.00 3.90
MAX 1.75 0.25 1.65* 0.51 5.00* 6.20* 4.00*
0.25 0.40
Dimension
(mm)
1.27
BSC
1.04 0.25
REF BSC
-
-
-
-
-
-
0.50 1.27
8O
15O
JEDEC Registration MS-012, Variation AA, Issue E, Sept. 2005.
* This dimension is not specified in the JEDEC drawing.
Drawings are not to scale.
Supertex Doc. #: DSPD-8SOLGTG, Version I041309.
Doc.# DSFP-LR12
C080113
Supertex inc.
www.supertex.com
9
LR12
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
e
.095
-
e1
.045
-
L
.500
-
MIN
NOM
MAX
.014†
-
.080
-
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.
(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-LR12
C080113
10
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