Supertex inc. LR12. High Input Voltage, Adjustable 3-Terminal Linear Regulator. Features. General Description. Applications. LR12 Typical Application

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1 High Input Voltage, Adjustable 3-Terminal Linear Regulator Features 13.2 to 100V input voltage range Stable with output capacitor Adjustable 1.20 to 88V output regulation 5% reference voltage tolerance Output current limiting, 50mA min. 10µA typical 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 is a high voltage, low output current, adjustable linear regulator. It has a wide operating input voltage range of V. The output voltage can be adjusted from V, 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 1 and R 2 as shown in the typical application circuits. The regulates the voltage difference between and pins to a nominal value of 1.20V. The 1.20V is amplified by the external resistor ratio R 1 and R 2. An internal constant bias current of typically 10µA is connected to the pin. This increases by a constant voltage of 10µA times R 2. The 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 turns off when an external voltage greater than the output voltage of the is applied to of the. To maintain stability, a bypass capacitor of or larger and a minimum DC output current of 500µA are required. Typical Application * 13.2 to 100V 1.2 to 88V R 1 C 1 C 2 R LOAD R 2 * Required for conditions where is less than. Doc.# DSFP-

2 Ordering Information Part Number Package Options Packing K4-G TO-252 (D-PAK) 2000/Reel LG-G 8-Lead SOIC 2500/Reel N3-G TO /Bag N3-G P002 TO /Reel N3-G P003 TO /Reel N3-G P005 TO /Reel N3-G P013 TO /Reel N3-G P014 TO /Reel -G denotes a lead (Pb)-free / RoHS compliant package Absolute Maximum Ratings Parameter Value V to +120V - -10V to +10V V to +120V Operating ambient temperature Operating junction temperature Storage temperature Power T A = 25 O C TO-252 (D-PAK) 8-Lead SOIC TO-92 Typical Thermal Resistance Package TO Lead SOIC TO-92 θ ja ( O C/W) 81 O C/W 101 O C/W 132 O C/W -40 C to +85 C -40 C to +125 C -65 C to +150 C 2.0W 1.8W 0.6W Pin Configuration NC NC 8-Lead SOIC Product Marking Si YYWW K4 LLLLLLL YYWW LLLL SiLR 12 Y WLL TO-252 (D-PAK) TO-92 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) 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 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: -40 O C < T A < +85 O C) Sym Parameter Min Typ Max Units Conditions - Input to output voltage difference V --- Overall output voltage regulation V 13.2V < <100V, R 1 = 2.4KΩ, R 2 = 0 Δ Line regulation %/V 15V < <100V,, = 0.5A Load regulation % = 15V,, 0.5mA< <50mA Temperature regulation % = 15V,, = 10mA, -40 O C < T A < 85 O C Doc.# DSFP- 2

3 Electrical Characteristics (cont.) Sym Parameter Min Typ Max Units Conditions Output current limit T J < 85 O C, - < 12V ma T J < 125 O C, - < 100V Minimum output current ma Includes R 1 and load current I Adjust output current µa --- C2 Minimum output load capacitance nf --- D /D Ripple rejection ratio db 120Hz, T LIMIT Junction temperature limit O C --- Functional Block Diagram Pass Element Overtemp & Overcurrent 1.2V 6.5V 1.0kΩ 10μA Current Limit I C (ma) Temperature ( O C) Doc.# DSFP- 3

4 Typical Application Circuits Figure 1: High Input Voltage, 5.0V Output Linear Regulator * Required for conditions where is less than. * = V R 1 C 2 R LOAD 16.5kΩ C 1 R kΩ R 2 = 1.20V 1+ + I R 2 R 1 Figure 2: SMPS Start-Up Circuit = 15 to 100V V AUX V CC FB PWM IC Figure 3: High Voltage Adjustable Constant Current Source = 1.20V R + = V - R Doc.# DSFP- 4

5 Typical Performance Curves 1.30 Temperature Variation V = 1.2V 2.4kΩ (V) T (junction) ( o C) 5.30 Load Regulation V 18.2kΩ R LOAD (V) (ma) Doc.# DSFP- 5

6 Typical Performance Curves (cont.) 6.0 vs V to 50V 1.0kΩ (V) kΩ (V) -65 Ripple Rejection 20V 120Hz 65V 18.2kΩ R LOAD Ripple Rejection Ratio (db) (ma) Doc.# DSFP- 6

7 Typical Performance Curves (cont) Load Transient Response 25V 18.2kΩ 10kΩ SW 509Ω Line Transient Response 100V 0V 0V 18.2kΩ 10kΩ Load Transient Response, Load = 509Ω Line Turn On/Off Response Line Power Up Transient Line Power Down Transient Doc.# DSFP- 7

8 3-Lead TO-252 (D-PAK) Package Outline (K4) E b3 E1 A c2 4 L3 θ1 D1 H D L4 L5 Note 1 b2 e b View B Front View Rear View Side View L2 Gauge A1 Seating θ L L1 View B Note: 1. Although 4 terminal locations are shown, only 3 are functional. Lead number 2 was removed. Dimension (inches) Symbol A A1 b b2 b3 c2 D D1 E E1 e H L L1 L2 L3 L4 L5 θ θ1 MIN * * O 0 O NOM BSC REF BSC MAX * * O 15 O JEDEC Registration TO-252, Variation AA, Issue E, June * This dimension is not specified in the JEDEC drawing. Drawings not to scale. Supertex Doc. #: DSPD-3TO252K4, Version E Doc.# DSFP- 8

9 8-Lead SOIC (Narrow Body) Package Outline (LG) 4.90x3.90mm body, 1.75mm height (max), 1.27mm pitch D θ1 8 Note 1 (Index Area D/2 x E1/2) E1 E L2 Gauge 1 L L1 Seating Top View A A2 A1 e b Seating Side View A A θ View B View B Note 1 h h 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. Dimension (mm) Symbol A A1 A2 b D E E1 e h L L1 L2 θ θ1 MIN 1.35* * 5.80* 3.80* O 5 O NOM BSC REF BSC MAX * * 6.20* 4.00* O 15 O JEDEC Registration MS-012, Variation AA, Issue E, Sept * This dimension is not specified in the JEDEC drawing. Drawings are not to scale. Supertex Doc. #: DSPD-8SOLGTG, Version I Doc.# DSFP- 9

10 3-Lead TO-92 Package Outline (N3) D Seating A L e1 e Front View b c Side View E1 1 3 E 2 Bottom View Dimensions (inches) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to 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. 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 (website: http//) 2013 All rights reserved. Unauthorized use or reproduction is prohibited. Doc.# DSFP- Symbol A b c D E E1 e e1 L MIN NOM MAX * 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 E Bordeaux Drive, Sunnyvale, CA Tel:

11 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Microchip: N3-G LG-G K4-G N3-G P005 N3-G P014 N3-G P013 N3-G P002 N3- G P003