SLUS212F - NOVEMBER 1999 - REVISED MAY 2009 D D D D D D D D 5-PIN TO-220 T PACKAGE (TOP VIEW) Fast Transient Response 10-mA to 5-A Load Current Short Circuit Protection Maximum Dropout of 500-mV at 5-A Load Current Separate Bias (VB) and VIN Pins Available in Adjustable or Fixed Output Voltages 5-Pin Package Allows Kelvin Sensing of Load Voltage Reverse Current Protection 5-PIN TO-263 TD PACKAGE (TOP VIEW) Note: Tab = Ground description The UC385 is a low dropout linear regulator providing a quick response to fast load changes. Combined with its precision onboard reference, the UC385 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 490 mV maximum and 350 mV typical at 5-A load (0C to 100C). The onboard bandgap reference is stable with temperature and scaled for a 1.2 V input to the internal power amplifier. The UC385 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. If the external resistors are omitted, the output voltage defaults to 1.2 V. block diagram VB 1 UC382-ADJ UC382-1 (1.5 V) UC382-2 (2.1 V) UC382-3 (2.5 V) R1 R2 OPEN 2 k 2 k 2 k 0 500 1.5 k 2.16 k THERMAL SHUTDOWN 2 1.2 V BANDGAP REFERENCE VIN + SHORT CIRCUIT SENSE R2 R1 3 5 4 GND ADJ VOUT UDG-00084 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. Copyright 1998-2009, Texas Instruments Incorporated !" # $%&" !# '%()$!" *!"&+ *%$"# $ " #'&$$!"# '& ",& "&# &-!# #"%&"# #"!*!* .!!"/+ *%$" '$&##0 *&# " &$&##!)/ $)%*& "&#"0 !)) '!!&"&#+ www.ti.com 1 SLUS212F - NOVEMBER 1999 - REVISED MAY 2009 absolute maximum ratings over operating free-air temperature (unless otherwise noted) VB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 V VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 V Output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 V to -6.0 V Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65C to 150C Junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55C to 150C Lead temperature (soldering, 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300C 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. AVAILABLE OPTIONS(1) PACKAGED DEVICES TO-263 (TD)(2) TO-220 (T) TJ OUTPUT VOLTAGE OUTPUT VOLTAGE 1.5 V 2.1 V 2.5 V 1.2 V or ADJ 1.5 V 2.1 V 2.5 V 1.2 V or ADJ -40C to 100C 285T-1 285T-2 285T-3 285T-ADJ 285TD-1 285TD-2 285TD-3 285TD-ADJ 0C to 100C 385T-1 385T-2 385T-3 385T-ADJ 385TD-1 385TD-2 385TD-3 385TD-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., UC285TDKTTT-1); for 500 piece reel, add TR (e.g., UC285TDTR-1). electrical characteristics unless otherwise stated, these parameters apply for TA = -40C to 100C for the UC285-x series and 0C to 100C for the UC385-x, VB = 5 V; VIN = 3.3 V, VOUT = 2.5 V, TA = TJ. PARAMETER TEST CONDITION MIN TYP MAX UNIT 2.475 2.5 2.525 V 2.45 2.5 2.525 0.5 4 UC385-3 Fixed 2.5 V, 5-A Family Output voltage UC385-3 UC285-3 Load regulation IVOUT = 100 mA IVOUT = 100 mA IVOUT = 10 mA to 5 A VIN PSRR 80 VB PSRR 50 VIN dropout voltage (VIN - VOUT) UC385-3 UC285-3 VB dropout (VB - VOUT) IVOUT = 5 A, IVOUT = 5 A UC385-3 IVOUT = 5 A IVOUT = 5 A UC285-3 IVOUT = 5 A TJ = 25C Short circuit current limit 110 IVOUT = 10 mA IVOUT = 5 A VIN current IVOUT = 5 A dB 65 dB 350 425 mV 350 490 mV 350 500 mV 1.8 2.1 V 1.8 2.2 V 5.1 VB current V mV 7.5 A 8 15 mA 40 100 mA 4.9 4.96 A 2.079 2.1 2.121 V 2.058 2.1 2.121 V 0.5 4 VIN PSRR 80 110 dB VB PSRR 50 67 dB UC385-2 Fixed 2.1 V, 5-A Family Output voltage UC385-2 UC285-2 Load regulation 2 IVOUT = 100 mA IVOUT = 100 mA IVOUT = 10 mA to 5 A www.ti.com mV SLUS212F - NOVEMBER 1999 - REVISED MAY 2009 electrical characteristics unless otherwise stated, these parameters apply for TA = -40C to 100C for the UC285-x series and 0C to 100C for the UC385-x, VB = 5 V; VIN = 3.3 V, VOUT = 2.5 V, TA = TJ. PARAMETER TEST CONDITION MIN TYP MAX UNIT 350 425 mV 350 490 mV 350 500 mV UC385-2 IVOUT = 5 A IVOUT = 5 A 1.8 2.1 V UC285-2 IVOUT = 5 A 1.8 2.2 V UC385-2 Fixed 2.1 V, 5-A Family (continued) VIN dropout voltage (VIN - VOUT) UC385-2 UC285-2 VB dropout (VB - VOUT) IVOUT = 5 A, IVOUT = 5 A TJ = 25C Short circuit current limit 5.1 VB current IVOUT = 10 mA IVOUT = 5 A VIN current IVOUT = 5 A 7.5 A 8 15 mA 40 100 mA 4.9 4.96 A 1.485 1.5 1.515 1.470 1.5 1.515 0.5 4 UC385-1 Fixed 1.5 V, 5-A Family Output voltage UC385-1 UC285-1 Load regulation IVOUT = 100 mA IVOUT = 100 mA IVOUT = 10 mA to 5 A VIN PSRR 80 110 VB PSRR 50 65 VIN dropout voltage (VIN - VOUT) UC285-1 UC285-2 VB dropout (VB - VOUT) IVOUT = 5 A, IVOUT 5 A UC385-1 IVOUT = 5 A IVOUT = 5 A UC285-1 IVOUT = 5 A TJ = 25C Short circuit current limit IVOUT = 10 mA IVOUT = 5 A VIN = current IVOUT = 5 A V mV dB dB 350 425 mV 350 490 mV 350 500 mV 1.8 2.1 V 1.8 2.2 V 7.5 A 8 15 mA 40 100 mA 5.1 VB current V 4.9 4.96 A 1.188 1.2 1.212 V 1.176 1.2 1.212 V 0.5 4 110 UC385-ADJ Adjustable, 5-A Family ADJ voltage UC385-ADJ UC285-ADJ Load regulation IVOUT - 100 mA IVOUT - 100 mA VIN PSRR IVOUT = 10 mA to 5 A VOUT programmed for 2.5 V 80 VB PSRR VOUT Programmed for 2.5 V 50 VIN dropout voltage (VIN - VOUT) IVOUT = 5 A, IVOUT = 5 A UC385-ADJ UC285-ADJ VB dropout (VB - VOUT) VIN current dB 65 dB 350 425 mV 350 490 mV IVOUT = 5 A IVOUT = 5 A 350 500 mV UC385-ADJ 1.8 2.1 V UC285-ADJ IVOUT = 5 A 1.8 2.2 V Short circuit current limit VB current TJ = 25C mV 5.1 IVOUT = 10 mA IVOUT = 5 A IVOUT = 5 A www.ti.com 4.9 7.5 A 8 15 mA 40 100 mA 4.96 A 3 SLUS212F - NOVEMBER 1999 - REVISED MAY 2009 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 noninverting operational amplifier. The resistors should meet the criteria of R3 || R4 < 100 . 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. 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 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 0C.) VIN: Supplies the current to the collector of the output power transistor only. The dropout (VIN-VOUT) is under 100 mV for light loads; maximum dropout is 490 mV at 5 A for TJ = 0C to 100C. (Dropout is derated for junction temperatures over 100C.) 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. DROPOUT VOLTAGE (VIN - VOUT) vs. LOAD CURRENT DROPOUT VOLTAGE (VB - VOUT) vs. LOAD CURRENT 400 VDO - Dropout Voltage (VIN - VOUT) - mV VDO - Dropout Voltage (VB - VOUT) - V 1.7 TJ = 27C 1.675 1.65 1.625 300 200 100 1.6 0 1 2 3 4 5 5 100m IL- Load Current - A IL- Load Current - A Figure 2 Figure 1 4 TJ = 27C www.ti.com SLUS212F - NOVEMBER 1999 - REVISED MAY 2009 APPLICATION INFORMATION The UC385 is easy to use. The adjustable version requires two resistors to set the output voltage. The fixed versions of the UC385 require no external resistors. All versions of the UC385 require decoupling capacitors on the input and output. In a typical application, VB and VIN are driven from switching power supplies which may have large filter capacitors at their outputs. If the UC385 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 UC385 with at least 100 F of high quality tantalum or Sanyo OSCON capacitors close to the VOUT pin for maximum stability. Many applications involving ultrafast 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 UC385 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 350 mV is measured at the pins and does not include additional drops due to trace resistance. OPEN LOOP PHASE vs. FREQUENCY OPEN LOOP GAIN vs. FREQUENCY 0 70 60 CO = 100 F IL = 1 A CO = 100 F IL = 1 A Gain - dB Phase - deg 50 -90 40 30 20 10 0 -180 -10 100 1k 10 k 100 k 1M 10 M 100 1k 10 k 100 k 1M 10 M f - Frequency - Hz f - Frequency - Hz Figure 4 Figure 3 www.ti.com 5 SLUS212F - NOVEMBER 1999 - REVISED MAY 2009 APPLICATION INFORMATION PSSR - Power Supply Rejection Ratio (VB Input) - dB POWER SUPPLY REJECTION RATIO (VB INPUT) vs. FREQUENCY 60 50 40 30 20 10 0 100 1k 10 k 100 k 1M 10 M f - Frequency - Hz Figure 5 1 F Ceramic + _ 5V 1 2 + + _ 3.3 V 4.7 F Tantalum VIN VB VOUT 4 + UC385-ADJ GND ADJ IRF 520 VO = 1.2 V 100 F Tantalum 121 R1 5 Pulse Generator 3 UDG-00085 Figure 6. Transient Test Circuit 6 www.ti.com SLUS212F - NOVEMBER 1999 - REVISED MAY 2009 APPLICATION INFORMATION 10 mA to 3 A/s Load Transient Response 20 10 0 -10 3 -20 2 1 0 I O - Load Current - A VO - Change in Output Voltage - mV 2 s/DIV Figure 7 +5 V + 4.7 F Kelvin Sense Point 1 +3.3 V 2 + 4.7 F VIN VB VOUT 4 R3 60 UC385-ADJ GND ADJ + 330 F OSCON +1.8 V Output F 2.2 Ceramic 5 R4 120 3 UDG-00086 Figure 8. Typical UC385-ADJ Application www.ti.com 7 SLUS212F - NOVEMBER 1999 - REVISED MAY 2009 APPLICATION INFORMATION +5 V + 4.7 F Kelvin Sense Point 1 2 VIN VB VOUT + UC385-1 GND +1.5 V Output 4 ADJ 330 F OSCON 2.2 F Ceramic 5 3 UDG-00087 Figure 9. Typical UC385-1, -2, or -3 Application 8 www.ti.com SLUS212F - NOVEMBER 1999 - REVISED MAY 2009 Revision History DATE REV PAGE SECTION 5/09 F 2 Absolute Maximum Ratings DESCRIPTION Added VB. NOTE: Page numbers for previous revisions may differ from page numbers in the current version. www.ti.com 9 PACKAGE OPTION ADDENDUM www.ti.com 28-Apr-2009 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty UC285T-1 ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC285T-1G3 ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC285T-3 ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC285T-3G3 ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC285T-ADJ ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC285T-ADJG3 ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC285TD-1 OBSOLETE DDPAK/ TO-263 KTT 5 TBD Call TI Call TI UC285TD-2 OBSOLETE DDPAK/ TO-263 KTT 5 TBD Call TI Call TI UC285TD-3 OBSOLETE DDPAK/ TO-263 KTT 5 TBD Call TI Call TI UC285TD-ADJ OBSOLETE DDPAK/ TO-263 KTT 5 TBD Call TI Call TI UC285TDKTTT-1 ACTIVE DDPAK/ TO-263 KTT 5 50 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC285TDKTTT-1G3 ACTIVE DDPAK/ TO-263 KTT 5 50 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC285TDKTTT-3 ACTIVE DDPAK/ TO-263 KTT 5 50 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC285TDKTTT-3G3 ACTIVE DDPAK/ TO-263 KTT 5 50 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC285TDKTTT-ADJ ACTIVE DDPAK/ TO-263 KTT 5 50 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC285TDKTTT-ADJG3 ACTIVE DDPAK/ TO-263 KTT 5 50 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385T-1 ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC385T-1G3 ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC385T-2 ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC385T-2G3 ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC385T-3 ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC385T-3G3 ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC385T-ADJ ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC385T-ADJG3 ACTIVE TO-220 KC 5 50 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type UC385TD-1 OBSOLETE DDPAK/ TO-263 KTT 5 TBD Call TI Call TI Addendum-Page 1 Lead/Ball Finish MSL Peak Temp (3) PACKAGE OPTION ADDENDUM www.ti.com 28-Apr-2009 Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty UC385TD-2 OBSOLETE DDPAK/ TO-263 KTT 5 TBD Call TI Call TI UC385TD-3 OBSOLETE DDPAK/ TO-263 KTT 5 TBD Call TI Call TI UC385TD-ADJ OBSOLETE DDPAK/ TO-263 KTT 5 TBD Call TI Call TI UC385TDKTTT-1 ACTIVE DDPAK/ TO-263 KTT 5 50 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385TDKTTT-1G3 ACTIVE DDPAK/ TO-263 KTT 5 50 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385TDKTTT-3 ACTIVE DDPAK/ TO-263 KTT 5 50 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385TDKTTT-3G3 ACTIVE DDPAK/ TO-263 KTT 5 50 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385TDKTTT-ADJ ACTIVE DDPAK/ TO-263 KTT 5 50 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385TDKTTT-ADJG3 ACTIVE DDPAK/ TO-263 KTT 5 50 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385TDTR-1 ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385TDTR-1G3 ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385TDTR-3 ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385TDTR-3G3 ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385TDTR-ADJ ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385TDTR-ADJE3 ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385TDTR-ADJG3 ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEAR UC385TH-ADJ OBSOLETE TO-220 KC 5 TBD Call TI Call TI Lead/Ball Finish MSL Peak Temp (3) (1) The marketing status values are defined 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 - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. 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 0.1% 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. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) Addendum-Page 2 PACKAGE OPTION ADDENDUM www.ti.com 28-Apr-2009 (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information 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 3 PACKAGE MATERIALS INFORMATION www.ti.com 28-Apr-2009 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel Diameter Width (mm) W1 (mm) A0 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant UC285TDKTTT-1 DDPAK/ TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2 UC285TDKTTT-3 DDPAK/ TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2 UC285TDKTTT-ADJ DDPAK/ TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2 UC385TDKTTT-1 DDPAK/ TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2 UC385TDKTTT-3 DDPAK/ TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2 UC385TDKTTT-ADJ DDPAK/ TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2 UC385TDTR-1 DDPAK/ TO-263 KTT 5 500 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2 UC385TDTR-3 DDPAK/ TO-263 KTT 5 500 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2 UC385TDTR-ADJ DDPAK/ TO-263 KTT 5 500 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 28-Apr-2009 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) UC285TDKTTT-1 DDPAK/TO-263 KTT 5 50 346.0 346.0 41.0 UC285TDKTTT-3 DDPAK/TO-263 KTT 5 50 346.0 346.0 41.0 UC285TDKTTT-ADJ DDPAK/TO-263 KTT 5 50 346.0 346.0 41.0 UC385TDKTTT-1 DDPAK/TO-263 KTT 5 50 346.0 346.0 41.0 UC385TDKTTT-3 DDPAK/TO-263 KTT 5 50 346.0 346.0 41.0 UC385TDKTTT-ADJ DDPAK/TO-263 KTT 5 50 346.0 346.0 41.0 UC385TDTR-1 DDPAK/TO-263 KTT 5 500 346.0 346.0 41.0 UC385TDTR-3 DDPAK/TO-263 KTT 5 500 346.0 346.0 41.0 UC385TDTR-ADJ DDPAK/TO-263 KTT 5 500 346.0 346.0 41.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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