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 10A is connected to the ADJ pin. This increases VOUT by a constant voltage of 10A times R2. Stable with 100nF output capacitor Adjustable 1.20 to 88V output regulation 5% reference voltage tolerance Output current limiting, 50mA min. 10A typical ADJ current Over temperature protection Available in 3 different packages Applications DC/DC SMPS startup circuits The LR12 has current limiting and temperature limiting. The output current limit is 100mA maximum and the minimum temperature limit is 125C. 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 500A are required. Adjustable high voltage constant current sources Industrial controls Motor controls Battery powered systems Power supplies Telecom applications LED drivers Automotive applications LR12 Typical Application * VOUT 1.2V to 88V VIN VIN 13.2V to 100V LR12 VOUT ADJ R1 C2 C1 R2 *Required for conditions where VIN is less than VOUT. RLOAD LR12 Ordering Information Pin Configurations VOUT Package Options Device 8-Lead SOIC TO-252 (D-PAK) TO-92 LR12 LR12LG-G LR12K4-G LR12N3-G VIN ADJ TO-252 (K4) -G indicates package is RoHS compliant (`Green') ADJ NC NC VIN ADJ VOUT VOUT VOUT VOUT 8-Lead SOIC (LG) Absolute Maximum Ratings Parameter Value VIN-ADJ -0.5V to +120V VOUT-ADJ -0.5V to +120V Operating ambient temperature -40C to +85C Operating junction temperature -40C to +125C Storage temperature -65C to +150C Si YYWW LR12K4 LLLLLLL TO-252 (K4) YYWW LR12 LLLL jc 8-Lead SOIC (LG) ja @ TA = 25OC (OC/W) (OC/W) TO-252 2.0W 6.25 50 8-Lead SOIC 1.8W - 55* TO-92 0.6W 125 170 Y = Last Digit of Year Sealed W = Code for Week Sealed L = Lot Number = "Green" Packaging S i LR 1 2 YWLL Package may or may not include the following marks: Si or TO-92 (N3) Notes: * Mounted on FR4 board, 25mm x 25mm x 1.57mm Electrical Characteristics (Test conditions unless otherwise specified: -40 C < T O Sym YY = Year Sealed WW = Week Sealed L = Lot Number = "Green" Packaging Package may or may not include the following marks: Si or Thermal Characteristics Package YY = Year Sealed WW = Week Sealed L = Lot Number = "Green" Packaging Package may or may not include the following marks: Si or Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Continuous operation of the device at the absolute rating level may affect device reliability. All voltages are referenced to device ground. Power Dissipation VOUT TO-92 (N3) Product Marking -10V to +10V VIN - VOUT VIN 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 = 2.4K, 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 VOUT Temperature regulation 2 Conditions 15V < VIN <100V, VOUT = 5.0V, IOUT = 0.5A 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 A --- 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 VOUT Overtemp & Overcurrent 6.5V 1.0K 1.2V 10A ADJ Current Limit 100 IC (mA) 90 80 70 60 50 -40 -20 0 20 40 Temperature (oC) 3 60 80 100 LR12 Typical Application Circuits Figure 1: High Input Voltage, 5.0V Output Linear Regulator * Required for conditions where VIN is less than VOUT. * VIN=17V to 100V VIN VOUT = 5.0V VOUT R1 6.04K 1% ADJ LR12 C1 C2 100nF RLOAD 16.5K R2 18.2K 1% VOUT = 1.20V 1+ R2 R1 + IADJ R2 Figure 2: SMPS Start-Up Circuit VIN=15V to 100V + VAUX VOUT1 VIN + VOUT ADJ LR12 VOUT2 VCC FB - PWM IC Figure 3: High Voltage Adjustable Constant Current Source IOUT = + VIN = 15V to 100V VIN VOUT ADJ R LR12 100nF - 4 1.20V R LR12 Typical Performance Curves VIN VOUT Temperature Variation VOUT = 1.2V 1.30 ADJ LR12 2.4K 100nF 1.25 VOUT (V) 13.2V 1.20 1.15 1.10 1.05 1.00 -50 -25 0 25 50 75 100 125 T(junction) (oC) VIN VOUT VOUT = 5.0V Load Regulation IOUT 5.30 5.25 ADJ 6.04K 1% LR12 5.20 100nF 25V 5.15 RLOAD VOUT (V) 18.2K 1% 5.10 5.05 5.00 4.95 4.90 4.85 4.80 0 5 10 15 20 25 30 IOUT (mA) 5 35 40 45 50 LR12 Typical Performance Curves (cont.) VOUT vs. VIN VOUT = 5.0V VOUT ADJ 6.04K 1% LR12 0V to 50V 5 100nF 1K VOUT (V) VIN 6 18.2K 1% 4 3 2 1 0 0 20 40 60 80 100 VIN (V) Ripple Rejection VOUT VOUT = 5.0V IOUT ADJ 20VP-P @ 120Hz 65V Ripple Rejection Ratio (dB) VIN -65 6.04K 1% LR12 100nF 18.2K 1% RLOAD -64 -63 -62 -61 -60 0 10 20 30 IOUT (mA) 6 40 50 LR12 Typical Performance Curves (cont) Load Transient Response Line Transient Response 100V VIN VOUT VOUT = 5V VIN ADJ LR12 6.04K 1% 100nF 25V 0V SW VIN VOUT ADJ 6.04K 1% LR12 100nF 10K 18.2K 1% 18.2K 1% 509 SW Open Closed VIN 50V/div VOUT 200mV/div VIN 5V/div Load Transient Response, Load = 509 Line Turn On/Off Response VIN 50V/div VIN 50V/div VIN 5V/div VIN 5V/div Line Power Down Transient Line Power Up Transient 7 10K LR12 3-Lead TO-252 D-PAK Package Outline (K4) b3 E A c2 E1 4 L3 1 D1 H D 1 2 3 L4 L5 Note 1 b2 Front View View B b e Side View Rear View Gauge Plane A1 Seating Plane L2 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 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. 8 L1 .108 REF L2 .020 BSC L3 L4 L5 1 .035 .025* .045 0 0O - - - - - .050 .040 .060 10O 15O O LR12 8-Lead SOIC (Narrow Body) Package Outline (LG) 4.90x3.90mm body, 1.75mm height (max), 1.27mm pitch D 1 8 E E1 L2 Note 1 (Index Area D/2 x E1/2) L 1 L1 Top View Gauge Plane Seating Plane View B A View B Note 1 h h A A2 Seating Plane b e A1 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 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 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. 9 L1 1.04 REF L2 0.25 BSC 1 0O 5O - - 8O 15O LR12 3-Lead TO-92 Package Outline (N3) D A 1 Seating Plane 2 3 L b e1 e c Side View Front View E1 E 3 1 2 Bottom View Symbol Dimensions (inches) A b MIN .170 .014 NOM - - MAX .210 .022 c .014 .022 D E E1 e e1 L .175 .125 .080 .095 .045 .500 - - - - - - .205 .165 .105 .105 .055 .610* JEDEC Registration TO-92. * This dimension is not specified in the original JEDEC drawing. The value listed is for reference only. This dimension is a non-JEDEC dimension. Drawings not to scale. Supertex Doc.#: DSPD-3TO92N3, Version D080408. (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. (c)2009 Doc.# DSFP-LR12 B030509 All rights reserved. Unauthorized use or reproduction is prohibited. 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com