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, 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. ►► 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 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 VIN VOUT ADJ C1 VOUT 1.2 to 88V LR12 R1 C2 RLOAD R2 * Required for conditions where VIN is less than VOUT. Doc.# DSFP-LR12 C080113 Supertex inc. www.supertex.com LR12 Pin Configuration Ordering Information Part Number Package Options Packing LR12K4-G TO-252 (D-PAK) 2000/Reel LR12LG-G 8-Lead SOIC 2500/Reel LR12N3-G TO-92 1000/Bag LR12N3-G P002 TO-92 2000/Reel LR12N3-G P003 TO-92 2000/Reel LR12N3-G P005 TO-92 2000/Reel LR12N3-G P013 TO-92 2000/Reel LR12N3-G P014 TO-92 2000/Reel VOUT VIN TO-252 (D-PAK) VIN ADJ NC NC ADJ -G denotes a lead (Pb)-free / RoHS compliant package VOUT VOUT VOUT VOUT Absolute Maximum Ratings Parameter VIN-ADJ -0.5V to +120V VOUT-ADJ -10V to +10V VIN - VOUT -0.5V to +120V Operating ambient temperature -40°C to +85°C Operating junction temperature -40°C to +125°C Storage temperature -65°C to +150°C Power Dissipation @ TA = 25OC TO-252 (D-PAK) 8-Lead SOIC TO-92 81 C/W 8-Lead SOIC 101OC/W TO-92 132OC/W VOUT 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 Typical Thermal Resistance TO-252 TO-92 Product Marking 2.0W 1.8W 0.6W θja ( VIN 8-Lead SOIC Value Package ADJ 8-Lead SOIC C/W) O Y = Last Digit of Year Sealed W = Code for Week Sealed L = Lot Number = “Green” Packaging S i LR 1 2 YWLL O Package may or may not include the following marks: Si or TO-92 Electrical Characteristics (Test conditions unless otherwise specified: -40 C < T O Sym A < +85OC) Parameter Min Typ Max Units 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 Load regulation - 1.4 3.0 % VIN = 15V, VOUT = 5.0V, 0.5mA< IOUT<50mA -1.0 - +1.0 % VIN = 15V, VOUT = 5.0V, IOUT = 10mA, -40OC < TA < 85OC ΔVOUT Temperature regulation Doc.# DSFP-LR12 C080113 2 Conditions 15V < VIN <100V, VOUT = 5.0V, IOUT = 0.5A Supertex inc. www.supertex.com LR12 Electrical Characteristics (cont.) Sym Min Typ Max 50 - 100 - - -0.5 Minimum output current 0.5 - - mA Includes R1 and load current IADJ Adjust output current 5.0 10 15 µA --- C2 Minimum output load capacitance 100 - - nF --- DVOUT/DVIN Ripple rejection ratio 50 60 - dB 120Hz, VOUT = 5.0V Junction temperature limit 125 - - O IOUT TLIMIT Parameter Output current limit Units ma C Conditions TJ < 85OC, VIN - VOUT < 12V TJ < 125OC, VIN - VOUT < 100V --- Functional Block Diagram LR12 Pass Element VIN Overtemp & Overcurrent 6.5V 1.0kΩ 1.2V VOUT 10μA ADJ Current Limit 100 IC (mA) 90 80 70 60 50 -40 -20 0 20 40 60 80 100 Temperature ( C) O Doc.# DSFP-LR12 C080113 3 Supertex inc. www.supertex.com LR12 Typical Application Circuits Figure 1: High Input Voltage, 5.0V Output Linear Regulator * Required for conditions where VIN is less than VOUT. * VIN = 17 - 100V VIN VOUT = 5.0V VOUT R1 6.04kΩ ±1% ADJ LR12 C1 R2 18.2kΩ ±1% C2 100nF VOUT = 1.20V 1+ RLOAD ≤ 16.5kΩ R2 R1 + IADJ R2 Figure 2: SMPS Start-Up Circuit VIN = 15 to 100V + VAUX VOUT1 VIN + VOUT ADJ LR12 VOUT2 VCC - PWM IC FB Figure 3: High Voltage Adjustable Constant Current Source IOUT = + VIN = 15 - 100V VIN VOUT ADJ R LR12 100nF - Doc.# DSFP-LR12 C080113 1.20V R 4 Supertex inc. www.supertex.com LR12 Typical Performance Curves Temperature Variation 1.30 1.25 VIN VOUT VOUT = 1.2V 1.20 LR12 13.2V VOUT (V) ADJ 100nF 2.4kΩ 1.15 1.10 1.05 1.00 -50 -25 0 25 50 75 100 125 T(junction) ( C) o Load Regulation 5.30 5.25 VOUT ADJ LR12 5.15 6.04kΩ ±1% 100nF 25V 5.20 IOUT VOUT (V) VIN VOUT = 5.0V RLOAD 18.2kΩ ±1% 5.10 5.05 5.00 4.95 4.90 4.85 4.80 0 5 10 15 20 25 30 35 40 45 50 IOUT (mA) Doc.# DSFP-LR12 C080113 5 Supertex inc. www.supertex.com LR12 Typical Performance Curves (cont.) VOUT vs. VIN 6.0 5.0 VOUT ADJ 6.04kΩ ±1% LR12 4.0 100nF 0V to 50V 1.0kΩ VOUT (V) VIN VOUT = 5.0V 18.2kΩ±1% 3.0 2.0 1.0 0 0 20 40 60 80 100 40 50 VIN (V) Ripple Rejection VIN VOUT ADJ 20VP-P @ 120Hz 65V LR12 VOUT = 5.0V IOUT 6.04kΩ ±1% 100nF RLOAD 18.2kΩ ±1% Ripple Rejection Ratio (dB) -65 -64 -63 -62 -61 -60 0 10 20 30 IOUT (mA) Doc.# DSFP-LR12 C080113 6 Supertex inc. www.supertex.com LR12 Typical Performance Curves (cont) Load Transient Response VIN VOUT ADJ LR12 25V Line Transient Response 100V VOUT = 5.0V 6.04kΩ ±1% 100nF SW 10kΩ 18.2kΩ ±1% 509Ω VOUT ADJ 0V LR12 VIN 0V Load Transient Response, Load = 509Ω 6.04kΩ ±1% 100nF 10kΩ 18.2kΩ ±1% Line Turn On/Off Response Line Power Up Transient Doc.# DSFP-LR12 C080113 VIN VIN Line Power Down Transient 7 Supertex inc. www.supertex.com LR12 3-Lead TO-252 (D-PAK) Package Outline (K4) b3 E A c2 E1 4 L3 θ1 D1 H D 1 2 3 L4 L5 Note 1 View B b2 b e Front View Side View Rear 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. Symbol Dimension (inches) MIN A A1 b b2 b3 c2 D D1 E E1 .086 .000* .025 .030 .195 .018 .235 .205 .250 .170 NOM - - - - - - .240 - - - MAX .094 .005 .035 .045 .215 .035 .245 .217* .265 .182* e .090 BSC H L .370 .055 - .060 .410 .070 L1 L2 .108 REF .020 BSC L3 L4 L5 θ θ1 .035 .025* .045 0O 0O - - - - - .050 .040 .060 10 O 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 8 Supertex inc. www.supertex.com 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 L2 L 1 θ L1 Top View View B Note 1 Gauge Plane Seating Plane View B h A h A A2 Seating Plane A1 e b Side View View A-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 Dimension (mm) A A1 A2 b MIN 1.35* 0.10 1.25 0.31 NOM - - - - MAX 1.75 0.25 1.65* 0.51 D E E1 4.80* 5.80* 3.80* 4.90 6.00 3.90 5.00* 6.20* 4.00* e 1.27 BSC h L 0.25 0.40 - - 0.50 1.27 L1 1.04 REF L2 0.25 BSC θ θ1 0O 5O - - 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 9 Supertex inc. www.supertex.com LR12 3-Lead TO-92 Package Outline (N3) D A Seating Plane 1 2 3 L c b e1 e Side View Front View E1 E 1 3 2 Bottom View Symbol Dimensions (inches) A b c MIN .170 .014 NOM - - MAX .210 .022 † .014 † D E E1 e e1 L .175 .125 .080 .095 .045 .500 - - - - - - .205 .165 .105 .105 .055 .610* † .022 † 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) Supertex inc. ©2013 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited. Doc.# DSFP-LR12 C080113 10 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com