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Linear Regulator. LR12 Datasheet

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Linear Regulator. LR12 Datasheet






LR12 Regulator. Datasheet pdf. Equivalent




LR12 Regulator. Datasheet pdf. Equivalent





Part

LR12

Description

Adjustable 3-Terminal Linear Regulator



Feature


Supertex inc. LR12 High Input Voltage, Adjustable 3-Terminal Linear Regulator Features ►► 13.2 to 100V input v oltage range ►► Stable with 100nF output capacitor ►► Adjustable 1.2 0 to 88V output regulation ►► 5% r eference voltage tolerance ►► O utput current limiting, 50mA min. ► 10µA typical ADJ current ►► Ov er temperature protection ►► Available in 3 di.
Manufacture

Supertex

Datasheet
Download LR12 Datasheet


Supertex LR12

LR12; fferent packages Applications ►► DC /DC SMPS startup circuits ►► Adjust able high voltage constant current sour ces ►► Industrial controls ►► M otor controls ►► Battery powered sy stems ►► Power supplies ►► Tele com applications ►► LED drivers ► ► Automotive applications General De scription The Supertex LR12 is a high v oltage, low output current, adjustable linear regulato.


Supertex LR12

r. It has a wide operating input voltage range of 13.2 - 100V. The output volta ge can be adjusted from 1.20 - 88V, pro vided that the input voltage is at leas t 12V greater than the output volt .


Supertex LR12

.

Part

LR12

Description

Adjustable 3-Terminal Linear Regulator



Feature


Supertex inc. LR12 High Input Voltage, Adjustable 3-Terminal Linear Regulator Features ►► 13.2 to 100V input v oltage range ►► Stable with 100nF output capacitor ►► Adjustable 1.2 0 to 88V output regulation ►► 5% r eference voltage tolerance ►► O utput current limiting, 50mA min. ► 10µA typical ADJ current ►► Ov er temperature protection ►► Available in 3 di.
Manufacture

Supertex

Datasheet
Download LR12 Datasheet




 LR12
Supertex inc.
LR12
High Input Voltage, Adjustable
3-Terminal Linear Regulator
Features
13.2 to 100V input voltage range
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
Motor controls
Battery powered systems
Power supplies
Telecom applications
LED drivers
Automotive applications
General Description
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, 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 LR12 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.
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-up circuit applications, the LR12 turns off when an external
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.
LR12 Typical Application
VIN
13.2 to 100V
C1
*
VIN VOUT
ADJ
LR12
R2
VOUT
1.2 to 88V
R1
C2
RLOAD
* Required for conditions where VIN is less than VOUT.
Doc.# DSFP-LR12
C080113
Supertex inc.
www.supertex.com




 LR12
LR12
Ordering Information
Part Number
Package Options
LR12K4-G
TO-252 (D-PAK)
LR12LG-G
8-Lead SOIC
LR12N3-G
TO-92
LR12N3-G P002
TO-92
LR12N3-G P003
TO-92
LR12N3-G P005
TO-92
LR12N3-G P013
TO-92
LR12N3-G P014
TO-92
-G denotes a lead (Pb)-free / RoHS compliant package
Packing
2000/Reel
2500/Reel
1000/Bag
2000/Reel
2000/Reel
2000/Reel
2000/Reel
2000/Reel
Absolute Maximum Ratings
Parameter
VIN-ADJ
VOUT-ADJ
VIN - VOUT
Operating ambient temperature
Operating junction temperature
Storage temperature
Power Dissipation @ TA = 25OC
TO-252 (D-PAK)
8-Lead SOIC
TO-92
Value
-0.5V to +120V
-10V to +10V
-0.5V to +120V
-40°C to +85°C
-40°C to +125°C
-65°C to +150°C
2.0W
1.8W
0.6W
Typical Thermal Resistance
Package
θja (OC/W)
TO-252
81OC/W
8-Lead SOIC
101OC/W
TO-92
132OC/W
Pin Configuration
VOUT
ADJ
VIN
TO-252 (D-PAK)
ADJ
NC
NC
VIN
VOUT
VOUT
VOUT
VOUT
8-Lead SOIC
ADJ
VIN
VOUT
TO-92
Product Marking
Si YYWW
LR12K4
LLLLLLL
YY = Year Sealed
WW = Week Sealed
L = Lot Number
= “Green” Packaging
Package may or may not include the following marks: Si or
TO-252 (D-PAK)
YYWW
LR12
LLLL
YY = Year Sealed
WW = Week Sealed
L = Lot Number
= “Green” Packaging
Package may or may not include the following marks: Si or
8-Lead SOIC
SiLR
12
YWLL
Y = Last Digit of Year Sealed
W = Code for Week Sealed
L = Lot Number
= “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 Units Conditions
VIN - VOUT Input to output voltage difference 12
- 98.8 V ---
VOUT
Overall output voltage regulation 1.14 1.20 1.26 V 13.2V < VIN <100V, R1 = 2.4KΩ, R2 = 0
Line regulation
- 0.003 0.03 %/V 15V < VIN <100V, VOUT = 5.0V, IOUT = 0.5A
ΔVOUT
Load regulation
-
1.4 3.0
%
VIN = 15V, VOUT = 5.0V,
0.5mA< IOUT<50mA
Temperature regulation
-1.0
-
+1.0
%
VIN = 15V, VOUT = 5.0V, IOUT = 10mA,
-40OC < TA < 85OC
Doc.# DSFP-LR12
C080113
Supertex inc.
2 www.supertex.com




 LR12
LR12
Electrical Characteristics (cont.)
Sym Parameter
Min Typ Max Units Conditions
Output current limit
IOUT
Minimum output current
IADJ Adjust output current
C2
Minimum output load
capacitance
50 - 100 ma TJ < 85OC, VIN - VOUT < 12V
- - -0.5
TJ < 125OC, VIN - VOUT < 100V
0.5 -
- mA Includes R1 and load current
5.0 10 15 µA ---
100 -
- nF ---
DVOUT/DVIN Ripple rejection ratio
TLIMIT
Junction temperature limit
50 60 - dB 120Hz, VOUT = 5.0V
125 -
- OC ---
Functional Block Diagram
VIN
Pass
Element
LR12
VOUT
Overtemp &
Overcurrent
1.2V
6.5V
1.0kΩ
10μA
ADJ
Current Limit
100
90
80
70
60
50
-40
-20
0 20 40 60
Temperature (OC)
80 100
Doc.# DSFP-LR12
C080113
Supertex inc.
3 www.supertex.com



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