TEXAS INSTRUMENTS UC282-1/UC282-2/UC282-3/UC282-ADJ/UC382-1/UC382-2/UC382-3/UC382-ADJ handbook
Contents
1. 300 C T Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied Exposure to absolute maximum rated conditions for extended periods may affect device reliability Currents are positive into negative out of the specified terminal Consult Packaging Section of Databook for thermal limitations and considerations of packages AVAILABLE OPTIONS 1 PACKAGED DEVICES TO 220 T TO 263 TD 2 Ty OUTPUT VOLTAGE OUTPUT VOLTAGE 1 5 V 24V 25V 1 2 V or ADJ 1 5 V 24 V 25V 1 2 V or ADJ 40 C to 100 C 282T 1 282T 2 282T 3 282T ADJ 282TD 1 282TD 2 282TD 3 282TD ADJ 0 C to 100 C 382T 1 382T 2 382T 3 382T ADJ 382TD 1 382TD 2 382TD 3 382TD ADJ 1 For more package and ordering information see the Package Option Addendum located at the end of this data sheet 2 For 50 piece reel add KTTT e g UC282TDKTTT 1 for 500 piece reel add TR e g UC282TDTR 1 electrical characteristics TA 40 C to 100 C for the UC282 X series and 0 C to 100 C for the UC382 X VB 5 V VIN 3 3 V VOUT 2 5 V for the UC382 ADu TA Ty unless otherwise stated UC382 3 fixed 2 5 V 3 A family PAR2. O UC282 1UC 282 1 UC282 2 UC282 3 UC282 ADJ UC382 1 UC382 2 UC382 3 UC382 ADJ Unitrode Products m from Texas Instruments FAST LDO LINEAR REGULATOR SLUS317B JANUARY 2000 REVISED FEBRUARY 2004 Fast Transient Response 5 PIN TO 220 10 mA to 3 A Load Current TPACKAGE Or WIEN Short Circuit Protection 5 ADJ Maximum Dropout of 450 mV at 3 A Load 4 VOUT Current 3 GND 2 VIN Separate Bias and VIN Pins 1 VB Available in Adjustable or Fixed Output Voltages 5 Pin Package Allows Kelvin Sensing of 5 Load Voltage PIN TO 263 4 07 TD PACKAGE 3 GND Reverse Current Protection TOP VIEW 2 VIN 1 VB Ts Note Tab Ground description The UC382 is a low dropout linear regulator providing a quick response to fast load changes Combined with its precision onboard reference the UC382 excels at driving GTL and BTL buses Due to its fast response to load transients the total capacitance required to decouple the regulator s output can be significantly decreased when compared to standard LDO linear regulators Dropout voltage VIN to VOUT is only 450 mV maximum at 100 C and 350 mV typical at 3 A load The onboard bandgap reference is stable with temperature and scaled for a 1 2 V input to the internal power amplifier The UC382 is available in fixed output voltages of 1 5 V 2 1 V or 2 5 V The output voltage of the adjustable version can be set with two external resistors
3. 41 5 V OUTPUT 330uF 2 2uF T UT CER Figure 9 Typical UC382 1 2 or 3 Application 35 TEXAS INSTRUMENTS 8 POST OFFICE BOX 655303 DALLAS TEXAS 75265 UDG 00082 UDG 00083 4 Texas INSTRUMENTS www ti com PACKAGING INFORMATION PACKAGE OPTION ADDENDUM 9 Dec 2004 Orderable Device Status Package Package Pins Package Eco Plan Lead Ball Finish MSL Peak Temp Type Drawing Qty UC282T 1 ACTIVE TO 220 KC 5 50 None CU SN Level NA NA NA UC282T 2 ACTIVE TO 220 KC 5 50 None CU SN Level NA NA NA UC282T 3 ACTIVE TO 220 KC 5 50 None CU SN Level NA NA NA UC282T ADJ ACTIVE TO 220 KC 5 1000 None CU SN Level NA NA NA UC282TD 1 OBSOLETE DDPAK KTT 5 None Call TI Call TI TO 263 UC282TD 2 OBSOLETE DDPAK KTT 5 None Call TI Call TI TO 263 UC282TD 3 OBSOLETE DDPAK KTT 5 None Call TI Call TI TO 263 UC282TD ADJ OBSOLETE DDPAK KTT 5 None Call TI Call TI TO 263 UC282TDKTTT 1 ACTIVE DDPAK KTT 5 50 None CU SN Level 2 220C 1 YEAR TO 263 UC282TDKTTT 2 ACTIVE DDPAK KTT 5 50 None CU SN Level 2 220C 1 YEAR TO 263 UC282TDKTTT 3 ACTIVE DDPAK KTT 5 50 None CU SN Level 2 220C 1 YEAR TO 263 UC282TDKTTT ADJ ACTIVE DDPAK KTT 5 50 None CU SN Level 2 220C 1 YEAR TO 263 UC282TDTR 1 ACTIVE DDPAK KTT 5 500 None CU SN Level 2 220C 1 YEAR TO 263 UC282TDTR 2 ACTIVE DDPAK KTT 5 500 None CU SN Level 2 220C 1 YEAR TO 263 UC282TDTR 3 ACTIVE DDPAK KTT 5 500
4. If the external resistors are omitted the output voltage defaults to 1 2 V block diagram UC382 ADJ UC382 1 1 5 V UC382 2 2 1 V UC382 3 2 5 V 3E BH 1 2V REFERENCE oot GND UDG 00080 Please be aware that an important notice concerning availability standard warranty and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet All trademarks are the property of their respective owners 435 TEXAS INSTRUMENTS POST OFFICE BOX 655303 9 DALLAS TEXAS 75265 1 PRODUCTION DATA information is current as of publication date Copyright 2000 2004 Texas Instruments Incorporated Products conform to specifications per the terms of Texas Instruments standard warranty Production processing does not necessarily include testing of all parameters UC282 1 UC282 2 UC282 3 UC282 ADJ UC382 1 UC382 2 UC382 3 UC382 ADJ FAST LDO LINEAR REGULATOR SLUS317B JANUARY 2000 REVISED FEBRUARY 2004 absolute maximum ratings over operating free air temperature unless otherwise noted t VB cesse nid eae ees eue eee lt eL ML I E e 13 V M aem 7 OUtDUL voltage reren re biceps 1 2 V to 6 0 V Storage temperature Tem 110 esctes event Oe eade o s bos pad da qd ee d dard dra 65 C to 150 C Junction temperature Tj es ne RR Ret sae 55 C to 150 C Lead temperature soldering 10 seconds
5. In a typical application VB and VIN are driven from switching power supplies which may have large filter capacitors at their outputs If the UC382 is further than 12 inches from the power supply it is recommended to add local decoupling as close as possible to the linear regulator Decouple the output of the UC382 with at least 100 uF of high quality tantalum or Sanyo OSCON capacitors close to the VOUT pin for maximum stability Many applications involving Ultra Fast GTL or BTL applications require additional capacitance close to the load The exact amount will vary according to speed and magnitude of the load transients and the tolerance allowed for transients on VOUT When specifying the decoupling capacitors the series resistance of the capacitor bank is an important factor in its ability to filter load transients The UC382 allows for Kelvin sensing the voltage at the load This improves regulation performance and eliminates the voltage drops due to wire trace resistance This voltage drop must be added to the headroom VIN to VOUT and VB to VOUT The dropout of 450 mV is measured at the pins and does not include additional drops due to trace resistance The minimum load current is 10 mA Two or more UC382 s may be used in parallel While stable this arrangement does degrade the transient response 35 TEXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 5 UC282 1 UC282 2 UC282 3 UC282 ADJ UC382 1 UC382 2 UC382
6. 212 V Load regulation lvoUT 10 mAto3A 0 5 4 mV VIN PSSR VOUT programmed for 2 5 V 80 100 dB VB PSSR VOUT programmed for 2 5 V 50 60 dB lvouTt 3A Ty 25 C 350 425 mV VIN dropout voltage VIN VOUT lvouT 3A UC382 ADJ 350 450 mV lvOUT 3 A UC282 ADJ 350 500 mV IyouT 3A UC382 ADJ 1 8 2 10 V a cca WEE VONT IVOUT 3A UC282 ADJ 18 220 v Short circuit current limit 3 3 4 5 A IVOUT 10 mA 6 11 mA VB current IVOUT 3A 18 BI mA VIN current IVOUT 3A 2 94 2 97 A pin descriptions ADJ In the adjustable version the user programs the output voltage with two external resistors The resistors should be 0 1 for high accuracy The output amplifier is configured as a non inverting operational amplifier The resistors should meet the criteria of R3 R4 lt 100 Q Connect ADJ to VOUT for an output voltage of 1 2 V Note that the point at which the feedback network is connected to the output is the Kelvin sense point For 1 2 and 3 versions ADJ pin is tied to VOUT to obtain specified output voltage GND For accurate results the GND pin should be referenced to the load ground VB Supplies power to all circuits of the regulator except the collector of the output power transistor The 2 V headroom from VB to VOUT allows the use of a Darlington output stage for inherently low output impedance and fast response Dropout is derated for junction temperatures below 0 C VIN Supplies the current to the collector of the outp
7. None CU SN Level 2 220C 1 YEAR TO 263 UC282TDTR ADJ ACTIVE DDPAK KTT 5 500 None CU SN Level 2 220C 1 YEAR TO 263 UC382T 1 ACTIVE TO 220 KC 5 50 None CU SN Level NA NA NA UC382T 2 ACTIVE TO 220 KC 5 50 None CU SN Level NA NA NA UC382T 3 ACTIVE TO 220 KC 5 50 None CU SN Level NA NA NA UC382T ADJ ACTIVE TO 220 KC 5 50 None CU SN Level NA NA NA UC382TD 1 OBSOLETE DDPAK KTT 5 None Call TI Call TI TO 263 UC382TD 2 OBSOLETE DDPAK KTT 5 None Call TI Call TI TO 263 UC382TD 3 OBSOLETE DDPAK KTT 5 None Call TI Call TI TO 263 UC382TD ADJ OBSOLETE DDPAK KTT 5 None Call TI Call TI TO 263 UC382TDKTTT 1 ACTIVE DDPAK KTT 5 50 None CU SN Level 2 220C 1 YEAR TO 263 UC382TDKTTT 2 ACTIVE DDPAK KTT 5 50 None CU SN Level 2 220C 1 YEAR TO 263 UC382TDKTTT 3 ACTIVE DDPAK KTT 5 50 None CU SN Level 2 220C 1 YEAR TO 263 UCS382TDKTTT ADJ ACTIVE DDPAK KTT 5 50 None CU SN Level 2 220C 1 YEAR TO 263 Addendum Page 1 K Texas PACKAGE OPTION ADDENDUM INSTRUMENTS www ti com 9 Dec 2004 Orderable Device Status Package Package Pins Package Eco Plan Lead Ball Finish MSL Peak Temp Type Drawing Qty UC382TDTR 1 ACTIVE DDPAK KTT 5 500 None CU SN Level 2 220C 1 YEAR TO 263 UC382TDTR 2 ACTIVE DDPAK KTT 5 500 None CU SN Level 2 220C 1 YEAR TO 263 UC382TDTR 3 ACTIVE DDPAK KTT 5 500 None CU SN Level 2 220C 1 YEAR TO 263 UC382TDTR ADJ ACTIVE DDPAK KTT 5 500 None CU SN Level 2 220C 1 YEAR TO 263 The marketing status values are defin
8. 3 UC382 ADJ FAST LDO LINEAR REGULATOR SLUS317B JANUARY 2000 REVISED FEBRUARY 2004 OPEN LOOP GAIN OPEN LOOP PHASE vs Ys FREQUENCY FREQUENCY 70 0 60 50 40 o e o 5 o v _ 30 a 90 s 20 10 0 10 180 100 1k 10k 100 1M 10M 100 1k 10k 100 k 1M 10M f Frequency Hz f Frequency Hz Figure 3 Figure 4 POWER SUPPLY REJECTION RATIO VB INPUT vs FREQUENCY 1 60 H 2 2 m 50 E 9 S 40 c 9 9 30 vc 2 20 o EJ o z 10 o 0 E 0 a 100 1k 10k 100 k 1M 10M f Frequency Hz Figure 5 i TEXAS INSTRUMENTS 6 POST OFFICE BOX 655303 DALLAS TEXAS 75265 UC282 1 UC282 2 UC282 3 UC282 ADJ UC382 1 UC382 2 UC382 3 UC382 ADJ FAST LDO LINEAR REGULATOR SLUS317B JANUARY 2000 REVISED FEBRUARY 2004 APPLICATION INFORMATION VB VIN VOUT 4 7 uF UC382 ADJ UDG 00081 Figure 6 Transient Test Circuit 10 mA to 3 A us Load Transient Response AVO 10 mV DIV IL 1 Arpiv 2 us DIV Figure 7 Wy TEXAS INSTRUMENTS POST OFFICE BOX 655303 9 DALLAS TEXAS 75265 7 UC282 1 UC282 2 UC282 3 UC282 ADJ UC382 1 UC382 2 UC382 3 UC382 ADJ FAST LDO LINEAR REGULATOR SLUS317B JANUARY 2000 REVISED FEBRUARY 2004 APPLICATION INFORMATION KELVIN SENSE 41 8V OUTPUT 2 2uF Figure 8 Typical UC382 ADJ Application KELVIN
9. AMETERS TEST CONDITIONS MIN TYP MAX UNITS UC382 3 2 475 2 500 2 525 V UC282 3 2450 2 500 2525 V Load regulation lvoUT 10 mAto3A 0 5 4 mV VIN PSSR 80 100 dB VB PSSR 50 60 dB lyOUT 3A Ty 25 C 350 425 mV VIN dropout voltage VIN VOUT lyOUT 3A UC382 3 350 450 mV lyOUT 3A UC282 3 350 500 mV IVOUT 3 A UC382 3 18 240 V 3A UC282 3 18 220 V Short circuit current limit 3 3 4 5 A lvouT 10 mA 6 11 mA VB current lyOUT 3 A 18 60 mA VIN current lyOUT 3 A 2 94 2 97 A 35 TEXAS INSTRUMENTS 2 POST OFFICE BOX 655303 DALLAS TEXAS 75265 UC282 1 UC282 2 UC282 3 UC282 ADJ UC382 1 UC382 2 UC382 3 UC382 ADJ FAST LDO LINEAR REGULATOR SLUS317B JANUARY 2000 REVISED FEBRUARY 2004 electrical characteristics TA 40 C to 100 C for the UC282 X series and 0 C to 100 C for the UC382 X VB 5 V VIN 3 3 V VOUT 2 5 V for the UC382 ADJ TA Ty unless otherwise stated UC382 2 fixed 2 1 V 3 A family PARAMETERS TEST CONDITIONS MIN TYP MAX UNITS UC382 2 2 079 2 100 2 121 V Qutput voltage lvouT 100 mA UC282 2 2 058 2 100 2121 v Load regulation lvOUT 10 mAto3A 0 5 4 mV VIN PSSR 80 100 dB VB PSSR 52 62 dB lvOUT 3 A TJ225 C 350 425 mV VIN dropout voltage VINCVOUT lvVOUT 3A UC382 2 350 450 mV lvOUT 3 A UC282 2 350 500 mV 3A UC382 2 1 8 2 10 V Von VETI QU
10. T m 284 UC282 2 18 220 V Short circuit current limit 3 3 4 5 A IVOUT 10 mA 6 11 mA VB current VOUT 3A 18 mA VIN current lvOUT 3A 2 94 2 97 A UC382 1 fixed 1 5 V 3 A family PARAMETERS TEST CONDITIONS MIN TYP MAX UNITS UC382 1 1 485 1 500 1 515 V Output voltage Ivou HD UC282 1 1 470 1 500 1515 V Load regulation lyvOUT 10 mA to 3 A 0 5 4 mV VIN PSSR 80 100 08 VB PSSR 55 65 dB lvouT 3 A Ty 25 C 350 425 mV VIN dropout voltage VINCVOUT lVOUT 3A UC382 1 350 450 mV IVOUT 3A UC282 1 350 500 mV Tet lvouT 3 A UC382 1 1 8 240 V lVOUT 3A UC282 1 1 8 2 20 V Short circuit current limit 3 3 4 5 A IyouT 10 mA 6 11 mA VB current 18 VIN current IVOUT 3 A 2 94 2 97 A 35 TEXAS INSTRUMENTS POST OFFICE BOX 655303 9 DALLAS TEXAS 75265 3 UC282 1 UC282 2 UC282 3 UC282 ADJ UC382 1 UC382 2 UC382 3 UC382 ADJ FAST LDO LINEAR REGULATOR SLUS317B JANUARY 2000 REVISED FEBRUARY 2004 electrical characteristics TA 40 C to 100 C for the UC282 X series and 0 C to 100 C for the UC382 X VB 5 V VIN 3 3 V VOUT 2 5 V for the UC382 ADJ TA Ty unless otherwise stated UC382 ADJ adjustable 3 A family PARAMETERS TEST CONDITIONS MIN TYP MAX UNITS UC382 ADJ 1 188 1 200 1 212 V UC282 ADJ 1176 1 200 1
11. TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual property of the third party or a license from TI under the patents or other intellectual property of TI Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties conditions limitations and notices Reproduction of this information with alteration is an unfair and deceptive business practice TI is not responsible or liable for such altered documentation Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice TI is not responsible or liable for any such statements Following are URLs where you can obtain information on other Texas Instruments products and application solutions Products Applications Amplifiers amplifier ti com Audio www ti com audio Data Converters dataconverter ti com Automotive www ti com automotive DSP dsp ti com Broadband www ti com broadband Interface interface ti com Digital Control www ti com digitalcontrol Logic logic ti com Military www ti com military Power Mgmt power ti com Optical Networking www ti com opticalnetwork Mic
12. ed as follows ACTIVE Product device recommended for new designs LIFEBUY TI has announced that the device will be discontinued and a lifetime buy period is in effect NRND Not recommended for new designs Device is in production to support existing customers but TI does not recommend using this part in a new design PREVIEW Device has been announced but is not in production Samples may or may not be available OBSOLETE TI has discontinued the production of the device 2 Eco Plan May not be currently available please check http www ti com productcontent for the latest availability information and additional product content details None Not yet available Lead Pb Free Pb Free RoHS TI s terms Lead Free or Pb Free mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances including the requirement that lead not exceed 0 196 by weight in homogeneous materials Where designed to be soldered at high temperatures TI Pb Free products are suitable for use in specified lead free processes Green RoHS amp no Sb Br TI defines Green to mean Pb Free and in addition uses package materials that do not contain halogens including bromine Br or antimony Sb above 0 1 of total product weight 3 MSL Peak Temp The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications and peak solder temperature Important Information and Disclaimer The i
13. ications enhancements improvements and other changes to its products and services at any time and to discontinue any product or service without notice Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete All products are sold subject to Tl s terms and conditions of sale supplied at the time of order acknowledgment TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with Tl s standard warranty Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty Except where mandated by government requirements testing of all parameters of each product is not necessarily performed TI assumes no liability for applications assistance or customer product design Customers are responsible for their products and applications using Tl components To minimize the risks associated with customer products and applications customers should provide adequate design and operating safeguards TI does not warrant or represent that any license either express or implied is granted under any TI patent right copyright mask work right or other TI intellectual property right relating to any combination machine or process in which TI products or services are used Information published by TI regarding third party products or services does not constitute a license from
14. nformation provided on this page represents TI s knowledge and belief as of the date that it is provided TI bases its knowledge and belief on information provided by third parties and makes no representation or warranty as to the accuracy of such information Efforts are underway to better integrate information from third parties TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals TI and TI suppliers consider certain information to be proprietary and thus CAS numbers and other limited information may not be available for release In no event shall TI s liability arising out of such information exceed the total purchase price of the TI part s at issue in this document sold by TI to Customer on an annual basis Addendum Page 2 MECHANICAL DATA KTT R PSFM G5 PLASTIC FLANGE MOUNT PACKAGE 0 420 10 67 0 380 9 65 0 245 6 22 Min mu 0 270 6 86 Min Exposed Thermal Tab A 0 012 0 30 0 000 0 00 0 036 0 91 6 026 0586 0 067 1 70 0 010 0 25 amp Gauge Plane Gauge Plane 0 010 0 25 OPTIONAL LEAD FORM 4200577 3 E 03 2005 A All linear dimensions are in inches millimeters B This drawing is subject to cha
15. nge without notice C Body dimensions do not include mold flash or protrusion Mold flash or protrusion not to exceed 0 005 0 13 per side N Falls within JEDEC T0 263 variation BA except minimum lead thickness maximum seating height and minimum body length 35 TEXAS INSTRUMENTS www ti com MECHANICAL DATA MSOT008B JANUARY 1995 REVISED SEPTEMBER 2000 KC R PSFM T5 PLASTIC FLANGE MOUNT 0 420 10 67 0 113 2 87 0 185 4 70 0 156 3 96 DIA 0 380 9 65 0 103 2 62 0 175 4 46 0 146 3 71 nd 4 46 0 055 1 40 0 045 1 14 0 147 3 73 0 137 3 48 0 340 8 64 0 330 8 38 y 26 34 0 125 3 18 25 32 see Note C EHE v 0 040 1 02 0 122 3 10 0 067 1 70 p 0 030 0 76 170 0 102 2 59 025 0 64 0 010 0 25 M 0 268 6 81 la 0012 0 30 4040208 E 09 00 NOTES A Alllinear dimensions are in inches millimeters B This drawing is subject to change without notice C Lead dimensions are not controlled within this area D Alllead dimensions apply before solder dip E The center lead is in electrical contact with the mounting tab 5 TEXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 1 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries TI reserve the right to make corrections modif
16. rocontrollers microcontroller ti com Security www ti com security Telephony www ti com telephony Video amp Imaging www ti com video Wireless www ti com wireless Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265 Copyright 2005 Texas Instruments Incorporated
17. ut power transistor only The dropout VIN VOUT is under 100 mV for light loads maximum dropout is 450 mV at 3 A for Ty 0 C to 100 C Dropout is derated for junction temperatures over 100 C At full load the majority of the VB current is going to the load VOUT This pin should be connected to the load via a low impedance path Avoid connectors which add significant inductance and resistance Note that even though a Kelvin sense is available through a 5 pin package care must be taken since voltage drops along wire traces add to the dropout voltage 3 TEXAS INSTRUMENTS 4 POST OFFICE BOX 655303 DALLAS TEXAS 75265 UC282 1 UC282 2 UC282 3 UC282 ADJ UC382 1 UC382 2 UC382 3 UC382 ADJ FAST LDO LINEAR REGULATOR SLUS317B JANUARY 2000 REVISED FEBRUARY 2004 pin descriptions continued Vpo Dropout Voltage V DROPOUT VOLTAGE Vg Vout DROPOUT VOLTAGE Vin Vout vs vs LOAD CURRENT LOAD CURRENT 1 9 400 Ty 27 C gt 27 J T TJ227C E o o 1 8 S 300 5 o Q 2 Q 1 7 Q 200 gt 1 6 100 0 1 2 3 100 mA 1A 2A 3A l Load Current A IL Load Current A Figure 1 Figure 2 APPLICATION INFORMATION The UC382 is easy to use The adjustable version requires two 0 1 resistors to set the output voltage The fixed versions of the UC382 require no external resistors All versions of the UC382 require decoupling capacitors on the input and output
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