LR12K4-G Supertex, LR12K4-G Datasheet

Linear Regulators - Standard 100V 50mA Adj 3-Term

LR12K4-G

Manufacturer Part Number
LR12K4-G
Description
Linear Regulators - Standard 100V 50mA Adj 3-Term
Manufacturer
Supertex
Datasheet

Specifications of LR12K4-G

Polarity
Positive
Number Of Outputs
1
Output Type
Adjustable
Output Voltage
10 V
Output Current
100 mA
Line Regulation
0.03 % / V
Load Regulation
3 %
Input Voltage Max
100 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Maximum Power Dissipation
2000 mW
Mounting Style
SMD/SMT
Output Voltage Tolerance
+/- 5 %
Voltage Regulation Accuracy
5 %
Package / Case
TO-252 (DPAK)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LR12K4-G
Quantity:
2 020
LR12 Typical Application
Features
Applications
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
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
13.2V to
100V
V
IN
C1
High Input Voltage, Adjustable
*Required for conditions where V
3-Terminal Linear Regulator
LR12
VIN
ADJ
VOUT
R2
*
IN
R1
is less than V
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
R
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 R
constant bias current of typically 10µA is connected to
the ADJ pin. This increases V
10µA times R
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.
1
and R
1.2V to 88V
V
OUT
2
OUT
C2
as shown in the typical application circuits. The
.
2
.
R
LOAD
OUT
by a constant voltage of
1
and R
2
. An internal
LR12
LR12

Related parts for LR12K4-G

LR12K4-G Summary of contents

Page 1

... V 3-Terminal Linear Regulator 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 ...

Page 2

... Ordering Information Package Options TO-252 Device 8-Lead SOIC (D-PAK) LR12 LR12LG-G LR12K4-G -G indicates package is RoHS compliant (‘Green’) Absolute Maximum Ratings Parameter V IN-ADJ V OUT-ADJ OUT Operating ambient temperature Operating junction temperature Storage temperature Absolute maximum ratings are those values beyond which damage to the device may oc- cur ...

Page 3

Electrical Characteristics Sym Parameter Output current limit I OUT Minimum output current I Adjust output current ADJ Minimum output load C2 capacitance DV /D Ripple rejection ratio OUT VIN T Junction temperature limit LIMIT Functional Block Diagram VIN Current Limit ...

Page 4

Typical Application Circuits Figure 1: High Input Voltage, 5.0V Output Linear Regulator * Required for conditions where V is less than =17V to 100V IN C1 Figure 2: SMPS Start-Up Circuit V =15V to 100V IN VIN ...

Page 5

Typical Performance Curves V OUT VIN VOUT ADJ LR12 13. 5.0V OUT VIN VOUT ADJ 6.04KΩ LR12 25V 18.2KΩ ±1% = 1.2V 2.4KΩ 100nF I OUT ±1% 100nF R LOAD 5 Temperature Variation 1.30 1.25 1.20 1.15 1.10 ...

Page 6

Typical Performance Curves V VIN VOUT ADJ LR12 0V to 50V 18.2KΩ ±1% V OUT VIN VOUT ADJ LR12 20V P-P @ 120Hz 65V 18.2KΩ ±1% (cont.) = 5.0V OUT 6.04KΩ ±1% 100nF 1KΩ 5.0V OUT 6.04KΩ ±1% ...

Page 7

Typical Performance Curves Load Transient Response OUT VIN VOUT ADJ LR12 6.04KΩ ±1% 25V 18.2KΩ ±1% SW Open Closed V OUT 200mV/div Load Transient Response, Load = 509Ω 50V/div V IN 5V/div Line Power Up ...

Page 8

... MAX .094 .005 .035 .045 JEDEC Registration TO-252, Variation AA, Issue E, June 2004. * This dimension is not specified in the original JEDEC drawing. The value listed is for reference only. Drawings not to scale. Supertex Doc. #: DSPD-3TO252K4, Version D081408 Note Rear View Gauge Plane θ ...

Page 9

... Dimension NOM - - (mm) MAX 1.75 0.25 JEDEC Registration MS-012, Variation AA, Issue E, Sept. 2005. * This dimension is not specified in the original JEDEC drawing. The value listed is for reference only. Drawings are not to scale. Supertex Doc. #: DSPD-8SOLGTG, Version H101708 Note 1 h Seating Plane ...

Page 10

... 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 ...

Related keywords